{"title":"High-Speed Handpiece Bearings","description":"\u003cp\u003eReplacement bearings for professional high-speed dental handpiece repair. Compare the bearing code, ID × OD × width, ball material, cage material and rated speed before ordering.\u003c\/p\u003e\n\u003cp\u003eThese are independent third-party replacement parts. Final fitment should be verified by a qualified handpiece repair technician.\u003c\/p\u003e\n\u003cdetails\u003e\n\u003csummary\u003e\u003cstrong\u003eFrequently Asked Questions\u003c\/strong\u003e\u003c\/summary\u003e\n\u003ch3\u003eHow do I select the correct replacement part?\u003c\/h3\u003e\n\u003cp\u003eIdentify the exact handpiece model or series, then compare the applicable dimensions, connection type, chuck type and rated speed. Compatibility may vary between model revisions. If you are unsure, send the model number, clear photos and available measurements before ordering.\u003c\/p\u003e\n\u003ch3\u003eWhich specifications should I verify?\u003c\/h3\u003e\n\u003cp\u003eCheck the part number, handpiece model or series, dimensions, material, rated speed and connection type where applicable. Final compatibility must be confirmed by the buyer or a qualified repair technician.\u003c\/p\u003e\n\u003ch3\u003eAre these original manufacturer parts?\u003c\/h3\u003e\n\u003cp\u003eNo, unless a product page explicitly states otherwise. Our products are independent third-party aftermarket replacement parts. Brand names and model references are used only to identify intended compatibility.\u003c\/p\u003e\n\u003ch3\u003eHow is international shipping arranged?\u003c\/h3\u003e\n\u003cp\u003eOur shipping responsibility and any included freight cover delivery only within mainland China. We can deliver to the buyer’s nominated freight forwarder in China. International freight, insurance, duties, taxes and customs clearance are arranged and paid by the buyer.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003e\u003cstrong\u003eCompatibility Disclaimer\u003c\/strong\u003e\u003c\/summary\u003e\n\u003cp\u003eThird-party trademarks, brand names and model designations belong to their respective owners and are used solely to identify intended compatibility.\u003c\/p\u003e\n\u003cp\u003eHandpiece Parts Hub is an independent supplier and is not affiliated with, authorized by, sponsored by or endorsed by any referenced original equipment manufacturer. Unless explicitly stated otherwise, all products are third-party aftermarket replacement parts and are not genuine OEM components.\u003c\/p\u003e\n\u003cp\u003eCompatibility may vary between models and production revisions. Customers must verify the part number, dimensions, material, rated speed, connection type and other applicable specifications before ordering. Installation and functional testing should be performed by a qualified repair technician.\u003c\/p\u003e\n\u003c\/details\u003e","products":[{"product_id":"hp-hs-a1-high-speed-dental-handpiece-bearing","title":"HP-HS-A1 High-Speed Bearing – SR144TLZN – 3.175 × 6.35 × 2.38 mm","description":"\u003cp\u003e\u003cstrong\u003eHP-HS-A1\u003c\/strong\u003e is an independent replacement bearing for professional high-speed dental handpiece repair. It is supplied under our internal HP reference so technicians can compare it with the original bearing before ordering.\u003c\/p\u003e\u003csection data-seo-geo=\"quick-answer\"\u003e\u003ch2\u003eQuick Answer\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eHP-HS-A1\u003c\/strong\u003e is a SR144TLZN high-speed dental handpiece bearing measuring 3.175 × 6.35 × 2.38 mm (ID × OD × W). It uses 440C rings + Torlon polyimide cage + Si3N4 ceramic balls and is rated above 400,000 RPM. Match the code, all three dimensions and construction details before ordering.\u003c\/p\u003e\u003c\/section\u003e\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eInternal SKU\u003c\/th\u003e\n\u003ctd\u003eHP-HS-A1\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eBearing code\u003c\/th\u003e\n\u003ctd\u003eSR144TLZN\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eDimensions\u003c\/th\u003e\n\u003ctd\u003e3.175 × 6.35 × 2.38 mm (ID × OD × W)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eRated speed\u003c\/th\u003e\n\u003ctd\u003e\u0026gt; 400,000 RPM\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eMaterial\u003c\/th\u003e\n\u003ctd\u003e440C rings + Torlon polyimide cage + Si3N4 ceramic balls\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eApplication\u003c\/th\u003e\n\u003ctd\u003eHigh-speed dental handpiece repair\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eNet weight\u003c\/th\u003e\n\u003ctd\u003e10 g\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003ePacked shipping weight\u003c\/th\u003e\n\u003ctd\u003e20 g\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\u003ch2\u003eBefore Ordering\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eMatch the bearing code and all three dimensions with the removed bearing.\u003c\/li\u003e\n\u003cli\u003eConfirm the ball and cage materials required for the repair.\u003c\/li\u003e\n\u003cli\u003eCheck shield, flange, groove and ring-width details where applicable.\u003c\/li\u003e\n\u003cli\u003eInstallation and functional testing should be completed by a qualified repair technician.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cdetails open\u003e\u003csummary\u003e\u003cstrong\u003eEnglish Bearing Code Reference\u003c\/strong\u003e\u003c\/summary\u003e\u003cp\u003eUse this table to read common high-speed handpiece bearing designations. The product-specific specifications above take priority whenever a code is not present or the construction differs.\u003c\/p\u003e\n\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth scope=\"col\"\u003eCode\u003c\/th\u003e\n\u003cth scope=\"col\"\u003eMeaning\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eS\u003c\/th\u003e\n\u003ctd\u003eMaterial-series prefix. Refer to the product-specific Material row above for the actual ring, cage and ball materials.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eF\u003c\/th\u003e\n\u003ctd\u003eThrust flange on the outer ring. With a 2.38 mm outer-ring width, the flange is 0.60 mm wide; with a 2.78 mm outer-ring width, it is 0.80 mm wide. For a grooved outer ring (G), the flange is 0.45 mm wide.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eR144\u003c\/th\u003e\n\u003ctd\u003eR144 is the basic series used in this designation. The listed dimensions for this SKU are 3.175 × 6.35 × 2.38 mm (ID × OD × W).\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eK1 \/ K2\u003c\/th\u003e\n\u003ctd\u003eAngular-contact construction. K1 indicates a separable inner ring; K2 indicates a separable outer ring. Angular-contact versions use a one-piece cage.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eTA \/ TL \/ Ti\u003c\/th\u003e\n\u003ctd\u003eCage material. TA: yellow polyimide; TL: black polyimide (Torlon); Ti: fabric-reinforced phenolic.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eK \/ G\u003c\/th\u003e\n\u003ctd\u003eOuter-ring profile. K indicates a stepped outer diameter; G indicates a grooved outer diameter.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eZ \/ Z1\u003c\/th\u003e\n\u003ctd\u003eShield configuration. Z indicates a one-sided shield; Z1 indicates an integral one-sided shield.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eW \/ W02\u003c\/th\u003e\n\u003ctd\u003eWidth code. W means both rings are 2.78 mm wide. W02 means the outer ring is 2.38 mm and the inner ring is 2.78 mm. With no width code, both rings are 2.38 mm wide.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eN\u003c\/th\u003e\n\u003ctd\u003eBall material. N indicates Si3N4 silicon-nitride ceramic balls. With no N code, the balls are 9Cr18Mo \/ AISI 440C steel.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003c\/details\u003e\u003csection data-seo-geo=\"common-questions\"\u003e\u003ch2\u003eCommon Questions\u003c\/h2\u003e\n\u003ch3\u003eWhat is HP-HS-A1?\u003c\/h3\u003e\n\u003cp\u003eHP-HS-A1 is our internal reference for a SR144TLZN replacement bearing. Its listed size is 3.175 × 6.35 × 2.38 mm (ID × OD × W), with ceramic balls and a Torlon cage.\u003c\/p\u003e\n\u003ch3\u003eHow do I confirm that this bearing will fit?\u003c\/h3\u003e\n\u003cp\u003eCompare the bearing code and the inner diameter, outer diameter and width with the removed bearing. Then confirm any shield, flange, groove, cage and ball-material requirements. A qualified handpiece repair technician should make the final fitment decision.\u003c\/p\u003e\n\u003ch3\u003eIs this an OEM bearing?\u003c\/h3\u003e\n\u003cp\u003eNo. This is an independent third-party replacement bearing. Brand and model names, when mentioned, are used only to identify compatibility; no manufacturer affiliation or endorsement is claimed.\u003c\/p\u003e\u003c\/section\u003e\u003cnav data-related-links=\"products\" aria-label=\"Related resources\"\u003e\u003ch2\u003eRelated Resources\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"\/collections\/high-speed-handpiece-bearings\"\u003eBrowse all high-speed handpiece bearings\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/blogs\/repair-guides\"\u003eRead dental handpiece repair guides\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\u003c\/nav\u003e\u003cp\u003e\u003cstrong\u003eCompatibility notice:\u003c\/strong\u003e HP-HS-A1 is an internal reseller SKU. This is an independent third-party replacement bearing and is not manufactured, sponsored, authorized or endorsed by the handpiece manufacturer. Final fitment must be verified before installation.\u003c\/p\u003e","brand":"Handpiece Parts Hub","offers":[{"title":"Default Title","offer_id":64436784595313,"sku":"HP-HS-A1","price":3.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1033\/9893\/2849\/files\/HP-HS-A1.png?v=1787191451"},{"product_id":"hp-hs-a2-high-speed-dental-handpiece-bearing","title":"HP-HS-A2 High-Speed Bearing – SR144TLZ – 3.175 × 6.35 × 2.38 mm","description":"\u003cp\u003e\u003cstrong\u003eHP-HS-A2\u003c\/strong\u003e is an independent replacement bearing for professional high-speed dental handpiece repair. It is supplied under our internal HP reference so technicians can compare it with the original bearing before ordering.\u003c\/p\u003e\u003csection data-seo-geo=\"quick-answer\"\u003e\u003ch2\u003eQuick Answer\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eHP-HS-A2\u003c\/strong\u003e is a SR144TLZ high-speed dental handpiece bearing measuring 3.175 × 6.35 × 2.38 mm (ID × OD × W). It uses 440C rings + Torlon polyimide cage + 440C steel balls and is rated above 400,000 RPM. Match the code, all three dimensions and construction details before ordering.\u003c\/p\u003e\u003c\/section\u003e\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eInternal SKU\u003c\/th\u003e\n\u003ctd\u003eHP-HS-A2\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eBearing code\u003c\/th\u003e\n\u003ctd\u003eSR144TLZ\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eDimensions\u003c\/th\u003e\n\u003ctd\u003e3.175 × 6.35 × 2.38 mm (ID × OD × W)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eRated speed\u003c\/th\u003e\n\u003ctd\u003e\u0026gt; 400,000 RPM\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eMaterial\u003c\/th\u003e\n\u003ctd\u003e440C rings + Torlon polyimide cage + 440C steel balls\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eApplication\u003c\/th\u003e\n\u003ctd\u003eHigh-speed dental handpiece repair\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eNet weight\u003c\/th\u003e\n\u003ctd\u003e10 g\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003ePacked shipping weight\u003c\/th\u003e\n\u003ctd\u003e20 g\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\u003ch2\u003eBefore Ordering\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eMatch the bearing code and all three dimensions with the removed bearing.\u003c\/li\u003e\n\u003cli\u003eConfirm the ball and cage materials required for the repair.\u003c\/li\u003e\n\u003cli\u003eCheck shield, flange, groove and ring-width details where applicable.\u003c\/li\u003e\n\u003cli\u003eInstallation and functional testing should be completed by a qualified repair technician.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cdetails open\u003e\u003csummary\u003e\u003cstrong\u003eEnglish Bearing Code Reference\u003c\/strong\u003e\u003c\/summary\u003e\u003cp\u003eUse this table to read common high-speed handpiece bearing designations. The product-specific specifications above take priority whenever a code is not present or the construction differs.\u003c\/p\u003e\n\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth scope=\"col\"\u003eCode\u003c\/th\u003e\n\u003cth scope=\"col\"\u003eMeaning\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eS\u003c\/th\u003e\n\u003ctd\u003eMaterial-series prefix. Refer to the product-specific Material row above for the actual ring, cage and ball materials.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eF\u003c\/th\u003e\n\u003ctd\u003eThrust flange on the outer ring. With a 2.38 mm outer-ring width, the flange is 0.60 mm wide; with a 2.78 mm outer-ring width, it is 0.80 mm wide. For a grooved outer ring (G), the flange is 0.45 mm wide.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eR144\u003c\/th\u003e\n\u003ctd\u003eR144 is the basic series used in this designation. The listed dimensions for this SKU are 3.175 × 6.35 × 2.38 mm (ID × OD × W).\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eK1 \/ K2\u003c\/th\u003e\n\u003ctd\u003eAngular-contact construction. K1 indicates a separable inner ring; K2 indicates a separable outer ring. Angular-contact versions use a one-piece cage.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eTA \/ TL \/ Ti\u003c\/th\u003e\n\u003ctd\u003eCage material. TA: yellow polyimide; TL: black polyimide (Torlon); Ti: fabric-reinforced phenolic.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eK \/ G\u003c\/th\u003e\n\u003ctd\u003eOuter-ring profile. K indicates a stepped outer diameter; G indicates a grooved outer diameter.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eZ \/ Z1\u003c\/th\u003e\n\u003ctd\u003eShield configuration. Z indicates a one-sided shield; Z1 indicates an integral one-sided shield.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eW \/ W02\u003c\/th\u003e\n\u003ctd\u003eWidth code. W means both rings are 2.78 mm wide. W02 means the outer ring is 2.38 mm and the inner ring is 2.78 mm. With no width code, both rings are 2.38 mm wide.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eN\u003c\/th\u003e\n\u003ctd\u003eBall material. N indicates Si3N4 silicon-nitride ceramic balls. With no N code, the balls are 9Cr18Mo \/ AISI 440C steel.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003c\/details\u003e\u003csection data-seo-geo=\"common-questions\"\u003e\u003ch2\u003eCommon Questions\u003c\/h2\u003e\n\u003ch3\u003eWhat is HP-HS-A2?\u003c\/h3\u003e\n\u003cp\u003eHP-HS-A2 is our internal reference for a SR144TLZ replacement bearing. Its listed size is 3.175 × 6.35 × 2.38 mm (ID × OD × W), with steel balls and a Torlon cage.\u003c\/p\u003e\n\u003ch3\u003eHow do I confirm that this bearing will fit?\u003c\/h3\u003e\n\u003cp\u003eCompare the bearing code and the inner diameter, outer diameter and width with the removed bearing. Then confirm any shield, flange, groove, cage and ball-material requirements. A qualified handpiece repair technician should make the final fitment decision.\u003c\/p\u003e\n\u003ch3\u003eIs this an OEM bearing?\u003c\/h3\u003e\n\u003cp\u003eNo. This is an independent third-party replacement bearing. Brand and model names, when mentioned, are used only to identify compatibility; no manufacturer affiliation or endorsement is claimed.\u003c\/p\u003e\u003c\/section\u003e\u003cnav data-related-links=\"products\" aria-label=\"Related resources\"\u003e\u003ch2\u003eRelated Resources\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"\/collections\/high-speed-handpiece-bearings\"\u003eBrowse all high-speed handpiece bearings\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/blogs\/repair-guides\"\u003eRead dental handpiece repair guides\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\u003c\/nav\u003e\u003cp\u003e\u003cstrong\u003eCompatibility notice:\u003c\/strong\u003e HP-HS-A2 is an internal reseller SKU. This is an independent third-party replacement bearing and is not manufactured, sponsored, authorized or endorsed by the handpiece manufacturer. Final fitment must be verified before installation.\u003c\/p\u003e","brand":"Handpiece Parts Hub","offers":[{"title":"Default Title","offer_id":64436784628081,"sku":"HP-HS-A2","price":3.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1033\/9893\/2849\/files\/HP-HS-A2.png?v=1787191451"},{"product_id":"hp-hs-a3-high-speed-dental-handpiece-bearing","title":"HP-HS-A3 High-Speed Bearing – SR144TiZN – 3.175 × 6.35 × 2.38 mm","description":"\u003cp\u003e\u003cstrong\u003eHP-HS-A3\u003c\/strong\u003e is an independent replacement bearing for professional high-speed dental handpiece repair. It is supplied under our internal HP reference so technicians can compare it with the original bearing before ordering.\u003c\/p\u003e\u003csection data-seo-geo=\"quick-answer\"\u003e\u003ch2\u003eQuick Answer\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eHP-HS-A3\u003c\/strong\u003e is a SR144TiZN high-speed dental handpiece bearing measuring 3.175 × 6.35 × 2.38 mm (ID × OD × W). It uses 440C rings + fabric-reinforced phenolic cage + Si3N4 ceramic balls and is rated above 400,000 RPM. Match the code, all three dimensions and construction details before ordering.\u003c\/p\u003e\u003c\/section\u003e\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eInternal SKU\u003c\/th\u003e\n\u003ctd\u003eHP-HS-A3\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eBearing code\u003c\/th\u003e\n\u003ctd\u003eSR144TiZN\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eDimensions\u003c\/th\u003e\n\u003ctd\u003e3.175 × 6.35 × 2.38 mm (ID × OD × W)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eRated speed\u003c\/th\u003e\n\u003ctd\u003e\u0026gt; 400,000 RPM\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eMaterial\u003c\/th\u003e\n\u003ctd\u003e440C rings + fabric-reinforced phenolic cage + Si3N4 ceramic balls\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eApplication\u003c\/th\u003e\n\u003ctd\u003eHigh-speed dental handpiece repair\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eNet weight\u003c\/th\u003e\n\u003ctd\u003e10 g\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003ePacked shipping weight\u003c\/th\u003e\n\u003ctd\u003e20 g\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\u003ch2\u003eBefore Ordering\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eMatch the bearing code and all three dimensions with the removed bearing.\u003c\/li\u003e\n\u003cli\u003eConfirm the ball and cage materials required for the repair.\u003c\/li\u003e\n\u003cli\u003eCheck shield, flange, groove and ring-width details where applicable.\u003c\/li\u003e\n\u003cli\u003eInstallation and functional testing should be completed by a qualified repair technician.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cdetails open\u003e\u003csummary\u003e\u003cstrong\u003eEnglish Bearing Code Reference\u003c\/strong\u003e\u003c\/summary\u003e\u003cp\u003eUse this table to read common high-speed handpiece bearing designations. The product-specific specifications above take priority whenever a code is not present or the construction differs.\u003c\/p\u003e\n\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth scope=\"col\"\u003eCode\u003c\/th\u003e\n\u003cth scope=\"col\"\u003eMeaning\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eS\u003c\/th\u003e\n\u003ctd\u003eMaterial-series prefix. Refer to the product-specific Material row above for the actual ring, cage and ball materials.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eF\u003c\/th\u003e\n\u003ctd\u003eThrust flange on the outer ring. With a 2.38 mm outer-ring width, the flange is 0.60 mm wide; with a 2.78 mm outer-ring width, it is 0.80 mm wide. For a grooved outer ring (G), the flange is 0.45 mm wide.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eR144\u003c\/th\u003e\n\u003ctd\u003eR144 is the basic series used in this designation. The listed dimensions for this SKU are 3.175 × 6.35 × 2.38 mm (ID × OD × W).\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eK1 \/ K2\u003c\/th\u003e\n\u003ctd\u003eAngular-contact construction. K1 indicates a separable inner ring; K2 indicates a separable outer ring. Angular-contact versions use a one-piece cage.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eTA \/ TL \/ Ti\u003c\/th\u003e\n\u003ctd\u003eCage material. TA: yellow polyimide; TL: black polyimide (Torlon); Ti: fabric-reinforced phenolic.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eK \/ G\u003c\/th\u003e\n\u003ctd\u003eOuter-ring profile. K indicates a stepped outer diameter; G indicates a grooved outer diameter.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eZ \/ Z1\u003c\/th\u003e\n\u003ctd\u003eShield configuration. Z indicates a one-sided shield; Z1 indicates an integral one-sided shield.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eW \/ W02\u003c\/th\u003e\n\u003ctd\u003eWidth code. W means both rings are 2.78 mm wide. W02 means the outer ring is 2.38 mm and the inner ring is 2.78 mm. With no width code, both rings are 2.38 mm wide.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eN\u003c\/th\u003e\n\u003ctd\u003eBall material. N indicates Si3N4 silicon-nitride ceramic balls. With no N code, the balls are 9Cr18Mo \/ AISI 440C steel.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003c\/details\u003e\u003csection data-seo-geo=\"common-questions\"\u003e\u003ch2\u003eCommon Questions\u003c\/h2\u003e\n\u003ch3\u003eWhat is HP-HS-A3?\u003c\/h3\u003e\n\u003cp\u003eHP-HS-A3 is our internal reference for a SR144TiZN replacement bearing. Its listed size is 3.175 × 6.35 × 2.38 mm (ID × OD × W), with ceramic balls and a phenolic cage.\u003c\/p\u003e\n\u003ch3\u003eHow do I confirm that this bearing will fit?\u003c\/h3\u003e\n\u003cp\u003eCompare the bearing code and the inner diameter, outer diameter and width with the removed bearing. Then confirm any shield, flange, groove, cage and ball-material requirements. A qualified handpiece repair technician should make the final fitment decision.\u003c\/p\u003e\n\u003ch3\u003eIs this an OEM bearing?\u003c\/h3\u003e\n\u003cp\u003eNo. This is an independent third-party replacement bearing. Brand and model names, when mentioned, are used only to identify compatibility; no manufacturer affiliation or endorsement is claimed.\u003c\/p\u003e\u003c\/section\u003e\u003cnav data-related-links=\"products\" aria-label=\"Related resources\"\u003e\u003ch2\u003eRelated Resources\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"\/collections\/high-speed-handpiece-bearings\"\u003eBrowse all high-speed handpiece bearings\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/blogs\/repair-guides\"\u003eRead dental handpiece repair guides\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\u003c\/nav\u003e\u003cp\u003e\u003cstrong\u003eCompatibility notice:\u003c\/strong\u003e HP-HS-A3 is an internal reseller SKU. This is an independent third-party replacement bearing and is not manufactured, sponsored, authorized or endorsed by the handpiece manufacturer. Final fitment must be verified before installation.\u003c\/p\u003e","brand":"Handpiece Parts Hub","offers":[{"title":"Default Title","offer_id":64436784693617,"sku":"HP-HS-A3","price":3.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1033\/9893\/2849\/files\/HP-HS-A3.png?v=1787191451"},{"product_id":"hp-hs-a4-high-speed-dental-handpiece-bearing","title":"HP-HS-A4 High-Speed Bearing – SR144TiZ – 3.175 × 6.35 × 2.38 mm","description":"\u003cp\u003e\u003cstrong\u003eHP-HS-A4\u003c\/strong\u003e is an independent replacement bearing for professional high-speed dental handpiece repair. It is supplied under our internal HP reference so technicians can compare it with the original bearing before ordering.\u003c\/p\u003e\u003csection data-seo-geo=\"quick-answer\"\u003e\u003ch2\u003eQuick Answer\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eHP-HS-A4\u003c\/strong\u003e is a SR144TiZ high-speed dental handpiece bearing measuring 3.175 × 6.35 × 2.38 mm (ID × OD × W). It uses 440C rings + fabric-reinforced phenolic cage + 440C steel balls and is rated above 400,000 RPM. Match the code, all three dimensions and construction details before ordering.\u003c\/p\u003e\u003c\/section\u003e\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eInternal SKU\u003c\/th\u003e\n\u003ctd\u003eHP-HS-A4\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eBearing code\u003c\/th\u003e\n\u003ctd\u003eSR144TiZ\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eDimensions\u003c\/th\u003e\n\u003ctd\u003e3.175 × 6.35 × 2.38 mm (ID × OD × W)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eRated speed\u003c\/th\u003e\n\u003ctd\u003e\u0026gt; 400,000 RPM\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eMaterial\u003c\/th\u003e\n\u003ctd\u003e440C rings + fabric-reinforced phenolic cage + 440C steel balls\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eApplication\u003c\/th\u003e\n\u003ctd\u003eHigh-speed dental handpiece repair\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eNet weight\u003c\/th\u003e\n\u003ctd\u003e10 g\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003ePacked shipping weight\u003c\/th\u003e\n\u003ctd\u003e20 g\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\u003ch2\u003eBefore Ordering\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eMatch the bearing code and all three dimensions with the removed bearing.\u003c\/li\u003e\n\u003cli\u003eConfirm the ball and cage materials required for the repair.\u003c\/li\u003e\n\u003cli\u003eCheck shield, flange, groove and ring-width details where applicable.\u003c\/li\u003e\n\u003cli\u003eInstallation and functional testing should be completed by a qualified repair technician.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cdetails open\u003e\u003csummary\u003e\u003cstrong\u003eEnglish Bearing Code Reference\u003c\/strong\u003e\u003c\/summary\u003e\u003cp\u003eUse this table to read common high-speed handpiece bearing designations. The product-specific specifications above take priority whenever a code is not present or the construction differs.\u003c\/p\u003e\n\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth scope=\"col\"\u003eCode\u003c\/th\u003e\n\u003cth scope=\"col\"\u003eMeaning\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eS\u003c\/th\u003e\n\u003ctd\u003eMaterial-series prefix. Refer to the product-specific Material row above for the actual ring, cage and ball materials.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eF\u003c\/th\u003e\n\u003ctd\u003eThrust flange on the outer ring. With a 2.38 mm outer-ring width, the flange is 0.60 mm wide; with a 2.78 mm outer-ring width, it is 0.80 mm wide. For a grooved outer ring (G), the flange is 0.45 mm wide.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eR144\u003c\/th\u003e\n\u003ctd\u003eR144 is the basic series used in this designation. The listed dimensions for this SKU are 3.175 × 6.35 × 2.38 mm (ID × OD × W).\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eK1 \/ K2\u003c\/th\u003e\n\u003ctd\u003eAngular-contact construction. K1 indicates a separable inner ring; K2 indicates a separable outer ring. Angular-contact versions use a one-piece cage.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eTA \/ TL \/ Ti\u003c\/th\u003e\n\u003ctd\u003eCage material. TA: yellow polyimide; TL: black polyimide (Torlon); Ti: fabric-reinforced phenolic.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eK \/ G\u003c\/th\u003e\n\u003ctd\u003eOuter-ring profile. K indicates a stepped outer diameter; G indicates a grooved outer diameter.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eZ \/ Z1\u003c\/th\u003e\n\u003ctd\u003eShield configuration. Z indicates a one-sided shield; Z1 indicates an integral one-sided shield.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eW \/ W02\u003c\/th\u003e\n\u003ctd\u003eWidth code. W means both rings are 2.78 mm wide. W02 means the outer ring is 2.38 mm and the inner ring is 2.78 mm. With no width code, both rings are 2.38 mm wide.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eN\u003c\/th\u003e\n\u003ctd\u003eBall material. N indicates Si3N4 silicon-nitride ceramic balls. With no N code, the balls are 9Cr18Mo \/ AISI 440C steel.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003c\/details\u003e\u003csection data-seo-geo=\"common-questions\"\u003e\u003ch2\u003eCommon Questions\u003c\/h2\u003e\n\u003ch3\u003eWhat is HP-HS-A4?\u003c\/h3\u003e\n\u003cp\u003eHP-HS-A4 is our internal reference for a SR144TiZ replacement bearing. Its listed size is 3.175 × 6.35 × 2.38 mm (ID × OD × W), with steel balls and a phenolic cage.\u003c\/p\u003e\n\u003ch3\u003eHow do I confirm that this bearing will fit?\u003c\/h3\u003e\n\u003cp\u003eCompare the bearing code and the inner diameter, outer diameter and width with the removed bearing. Then confirm any shield, flange, groove, cage and ball-material requirements. A qualified handpiece repair technician should make the final fitment decision.\u003c\/p\u003e\n\u003ch3\u003eIs this an OEM bearing?\u003c\/h3\u003e\n\u003cp\u003eNo. This is an independent third-party replacement bearing. Brand and model names, when mentioned, are used only to identify compatibility; no manufacturer affiliation or endorsement is claimed.\u003c\/p\u003e\u003c\/section\u003e\u003cnav data-related-links=\"products\" aria-label=\"Related resources\"\u003e\u003ch2\u003eRelated Resources\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"\/collections\/high-speed-handpiece-bearings\"\u003eBrowse all high-speed handpiece bearings\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/blogs\/repair-guides\"\u003eRead dental handpiece repair guides\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\u003c\/nav\u003e\u003cp\u003e\u003cstrong\u003eCompatibility notice:\u003c\/strong\u003e HP-HS-A4 is an internal reseller SKU. This is an independent third-party replacement bearing and is not manufactured, sponsored, authorized or endorsed by the handpiece manufacturer. Final fitment must be verified before installation.\u003c\/p\u003e","brand":"Handpiece Parts Hub","offers":[{"title":"Default Title","offer_id":64436784726385,"sku":"HP-HS-A4","price":3.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1033\/9893\/2849\/files\/HP-HS-A4.png?v=1787191451"},{"product_id":"hp-hs-a6-high-speed-dental-handpiece-bearing","title":"HP-HS-A6 High-Speed Bearing – SR144TLZ1N – 3.175 × 6.35 × 2.38 mm","description":"\u003cp\u003e\u003cstrong\u003eHP-HS-A6\u003c\/strong\u003e is an independent replacement bearing for professional high-speed dental handpiece repair. It is supplied under our internal HP reference so technicians can compare it with the original bearing before ordering.\u003c\/p\u003e\u003csection data-seo-geo=\"quick-answer\"\u003e\u003ch2\u003eQuick Answer\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eHP-HS-A6\u003c\/strong\u003e is a SR144TLZ1N high-speed dental handpiece bearing measuring 3.175 × 6.35 × 2.38 mm (ID × OD × W). It uses 440C rings + Torlon polyimide cage + Si3N4 ceramic balls and is rated above 400,000 RPM. Match the code, all three dimensions and construction details before ordering.\u003c\/p\u003e\u003c\/section\u003e\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eInternal SKU\u003c\/th\u003e\n\u003ctd\u003eHP-HS-A6\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eBearing code\u003c\/th\u003e\n\u003ctd\u003eSR144TLZ1N\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eDimensions\u003c\/th\u003e\n\u003ctd\u003e3.175 × 6.35 × 2.38 mm (ID × OD × W)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eRated speed\u003c\/th\u003e\n\u003ctd\u003e\u0026gt; 400,000 RPM\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eMaterial\u003c\/th\u003e\n\u003ctd\u003e440C rings + Torlon polyimide cage + Si3N4 ceramic balls\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eApplication\u003c\/th\u003e\n\u003ctd\u003eHigh-speed dental handpiece repair\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eNet weight\u003c\/th\u003e\n\u003ctd\u003e10 g\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003ePacked shipping weight\u003c\/th\u003e\n\u003ctd\u003e20 g\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\u003ch2\u003eBefore Ordering\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eMatch the bearing code and all three dimensions with the removed bearing.\u003c\/li\u003e\n\u003cli\u003eConfirm the ball and cage materials required for the repair.\u003c\/li\u003e\n\u003cli\u003eCheck shield, flange, groove and ring-width details where applicable.\u003c\/li\u003e\n\u003cli\u003eInstallation and functional testing should be completed by a qualified repair technician.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cdetails open\u003e\u003csummary\u003e\u003cstrong\u003eEnglish Bearing Code Reference\u003c\/strong\u003e\u003c\/summary\u003e\u003cp\u003eUse this table to read common high-speed handpiece bearing designations. The product-specific specifications above take priority whenever a code is not present or the construction differs.\u003c\/p\u003e\n\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth scope=\"col\"\u003eCode\u003c\/th\u003e\n\u003cth scope=\"col\"\u003eMeaning\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eS\u003c\/th\u003e\n\u003ctd\u003eMaterial-series prefix. Refer to the product-specific Material row above for the actual ring, cage and ball materials.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eF\u003c\/th\u003e\n\u003ctd\u003eThrust flange on the outer ring. With a 2.38 mm outer-ring width, the flange is 0.60 mm wide; with a 2.78 mm outer-ring width, it is 0.80 mm wide. For a grooved outer ring (G), the flange is 0.45 mm wide.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eR144\u003c\/th\u003e\n\u003ctd\u003eR144 is the basic series used in this designation. The listed dimensions for this SKU are 3.175 × 6.35 × 2.38 mm (ID × OD × W).\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eK1 \/ K2\u003c\/th\u003e\n\u003ctd\u003eAngular-contact construction. K1 indicates a separable inner ring; K2 indicates a separable outer ring. Angular-contact versions use a one-piece cage.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eTA \/ TL \/ Ti\u003c\/th\u003e\n\u003ctd\u003eCage material. TA: yellow polyimide; TL: black polyimide (Torlon); Ti: fabric-reinforced phenolic.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eK \/ G\u003c\/th\u003e\n\u003ctd\u003eOuter-ring profile. K indicates a stepped outer diameter; G indicates a grooved outer diameter.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eZ \/ Z1\u003c\/th\u003e\n\u003ctd\u003eShield configuration. Z indicates a one-sided shield; Z1 indicates an integral one-sided shield.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eW \/ W02\u003c\/th\u003e\n\u003ctd\u003eWidth code. W means both rings are 2.78 mm wide. W02 means the outer ring is 2.38 mm and the inner ring is 2.78 mm. With no width code, both rings are 2.38 mm wide.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eN\u003c\/th\u003e\n\u003ctd\u003eBall material. N indicates Si3N4 silicon-nitride ceramic balls. With no N code, the balls are 9Cr18Mo \/ AISI 440C steel.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003c\/details\u003e\u003csection data-seo-geo=\"common-questions\"\u003e\u003ch2\u003eCommon Questions\u003c\/h2\u003e\n\u003ch3\u003eWhat is HP-HS-A6?\u003c\/h3\u003e\n\u003cp\u003eHP-HS-A6 is our internal reference for a SR144TLZ1N replacement bearing. Its listed size is 3.175 × 6.35 × 2.38 mm (ID × OD × W), with ceramic balls and a Torlon cage.\u003c\/p\u003e\n\u003ch3\u003eHow do I confirm that this bearing will fit?\u003c\/h3\u003e\n\u003cp\u003eCompare the bearing code and the inner diameter, outer diameter and width with the removed bearing. Then confirm any shield, flange, groove, cage and ball-material requirements. A qualified handpiece repair technician should make the final fitment decision.\u003c\/p\u003e\n\u003ch3\u003eIs this an OEM bearing?\u003c\/h3\u003e\n\u003cp\u003eNo. This is an independent third-party replacement bearing. Brand and model names, when mentioned, are used only to identify compatibility; no manufacturer affiliation or endorsement is claimed.\u003c\/p\u003e\u003c\/section\u003e\u003cnav data-related-links=\"products\" aria-label=\"Related resources\"\u003e\u003ch2\u003eRelated Resources\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"\/collections\/high-speed-handpiece-bearings\"\u003eBrowse all high-speed handpiece bearings\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/blogs\/repair-guides\"\u003eRead dental handpiece repair guides\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\u003c\/nav\u003e\u003cp\u003e\u003cstrong\u003eCompatibility notice:\u003c\/strong\u003e HP-HS-A6 is an internal reseller SKU. This is an independent third-party replacement bearing and is not manufactured, sponsored, authorized or endorsed by the handpiece manufacturer. Final fitment must be verified before installation.\u003c\/p\u003e","brand":"Handpiece Parts Hub","offers":[{"title":"Default Title","offer_id":64436784759153,"sku":"HP-HS-A6","price":3.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1033\/9893\/2849\/files\/HP-HS-A6.png?v=1787191451"},{"product_id":"hp-hs-a7-high-speed-dental-handpiece-bearing","title":"HP-HS-A7 High-Speed Bearing – SR144TiZ1N – 3.175 × 6.35 × 2.38 mm","description":"\u003cp\u003e\u003cstrong\u003eHP-HS-A7\u003c\/strong\u003e is an independent replacement bearing for professional high-speed dental handpiece repair. It is supplied under our internal HP reference so technicians can compare it with the original bearing before ordering.\u003c\/p\u003e\u003csection data-seo-geo=\"quick-answer\"\u003e\u003ch2\u003eQuick Answer\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eHP-HS-A7\u003c\/strong\u003e is a SR144TiZ1N high-speed dental handpiece bearing measuring 3.175 × 6.35 × 2.38 mm (ID × OD × W). It uses 440C rings + fabric-reinforced phenolic cage + Si3N4 ceramic balls and is rated above 400,000 RPM. Match the code, all three dimensions and construction details before ordering.\u003c\/p\u003e\u003c\/section\u003e\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eInternal SKU\u003c\/th\u003e\n\u003ctd\u003eHP-HS-A7\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eBearing code\u003c\/th\u003e\n\u003ctd\u003eSR144TiZ1N\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eDimensions\u003c\/th\u003e\n\u003ctd\u003e3.175 × 6.35 × 2.38 mm (ID × OD × W)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eRated speed\u003c\/th\u003e\n\u003ctd\u003e\u0026gt; 400,000 RPM\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eMaterial\u003c\/th\u003e\n\u003ctd\u003e440C rings + fabric-reinforced phenolic cage + Si3N4 ceramic balls\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eApplication\u003c\/th\u003e\n\u003ctd\u003eHigh-speed dental handpiece repair\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eNet weight\u003c\/th\u003e\n\u003ctd\u003e10 g\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003ePacked shipping weight\u003c\/th\u003e\n\u003ctd\u003e20 g\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\u003ch2\u003eBefore Ordering\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eMatch the bearing code and all three dimensions with the removed bearing.\u003c\/li\u003e\n\u003cli\u003eConfirm the ball and cage materials required for the repair.\u003c\/li\u003e\n\u003cli\u003eCheck shield, flange, groove and ring-width details where applicable.\u003c\/li\u003e\n\u003cli\u003eInstallation and functional testing should be completed by a qualified repair technician.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cdetails open\u003e\u003csummary\u003e\u003cstrong\u003eEnglish Bearing Code Reference\u003c\/strong\u003e\u003c\/summary\u003e\u003cp\u003eUse this table to read common high-speed handpiece bearing designations. The product-specific specifications above take priority whenever a code is not present or the construction differs.\u003c\/p\u003e\n\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth scope=\"col\"\u003eCode\u003c\/th\u003e\n\u003cth scope=\"col\"\u003eMeaning\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eS\u003c\/th\u003e\n\u003ctd\u003eMaterial-series prefix. Refer to the product-specific Material row above for the actual ring, cage and ball materials.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eF\u003c\/th\u003e\n\u003ctd\u003eThrust flange on the outer ring. With a 2.38 mm outer-ring width, the flange is 0.60 mm wide; with a 2.78 mm outer-ring width, it is 0.80 mm wide. For a grooved outer ring (G), the flange is 0.45 mm wide.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eR144\u003c\/th\u003e\n\u003ctd\u003eR144 is the basic series used in this designation. The listed dimensions for this SKU are 3.175 × 6.35 × 2.38 mm (ID × OD × W).\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eK1 \/ K2\u003c\/th\u003e\n\u003ctd\u003eAngular-contact construction. K1 indicates a separable inner ring; K2 indicates a separable outer ring. Angular-contact versions use a one-piece cage.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eTA \/ TL \/ Ti\u003c\/th\u003e\n\u003ctd\u003eCage material. TA: yellow polyimide; TL: black polyimide (Torlon); Ti: fabric-reinforced phenolic.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eK \/ G\u003c\/th\u003e\n\u003ctd\u003eOuter-ring profile. K indicates a stepped outer diameter; G indicates a grooved outer diameter.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eZ \/ Z1\u003c\/th\u003e\n\u003ctd\u003eShield configuration. Z indicates a one-sided shield; Z1 indicates an integral one-sided shield.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eW \/ W02\u003c\/th\u003e\n\u003ctd\u003eWidth code. W means both rings are 2.78 mm wide. W02 means the outer ring is 2.38 mm and the inner ring is 2.78 mm. With no width code, both rings are 2.38 mm wide.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eN\u003c\/th\u003e\n\u003ctd\u003eBall material. N indicates Si3N4 silicon-nitride ceramic balls. With no N code, the balls are 9Cr18Mo \/ AISI 440C steel.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003c\/details\u003e\u003csection data-seo-geo=\"common-questions\"\u003e\u003ch2\u003eCommon Questions\u003c\/h2\u003e\n\u003ch3\u003eWhat is HP-HS-A7?\u003c\/h3\u003e\n\u003cp\u003eHP-HS-A7 is our internal reference for a SR144TiZ1N replacement bearing. Its listed size is 3.175 × 6.35 × 2.38 mm (ID × OD × W), with ceramic balls and a phenolic cage.\u003c\/p\u003e\n\u003ch3\u003eHow do I confirm that this bearing will fit?\u003c\/h3\u003e\n\u003cp\u003eCompare the bearing code and the inner diameter, outer diameter and width with the removed bearing. Then confirm any shield, flange, groove, cage and ball-material requirements. A qualified handpiece repair technician should make the final fitment decision.\u003c\/p\u003e\n\u003ch3\u003eIs this an OEM bearing?\u003c\/h3\u003e\n\u003cp\u003eNo. This is an independent third-party replacement bearing. Brand and model names, when mentioned, are used only to identify compatibility; no manufacturer affiliation or endorsement is claimed.\u003c\/p\u003e\u003c\/section\u003e\u003cnav data-related-links=\"products\" aria-label=\"Related resources\"\u003e\u003ch2\u003eRelated Resources\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"\/collections\/high-speed-handpiece-bearings\"\u003eBrowse all high-speed handpiece bearings\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/blogs\/repair-guides\"\u003eRead dental handpiece repair guides\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\u003c\/nav\u003e\u003cp\u003e\u003cstrong\u003eCompatibility notice:\u003c\/strong\u003e HP-HS-A7 is an internal reseller SKU. This is an independent third-party replacement bearing and is not manufactured, sponsored, authorized or endorsed by the handpiece manufacturer. Final fitment must be verified before installation.\u003c\/p\u003e","brand":"Handpiece Parts Hub","offers":[{"title":"Default Title","offer_id":64436784824689,"sku":"HP-HS-A7","price":3.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1033\/9893\/2849\/files\/HP-HS-A7.png?v=1787191451"},{"product_id":"hp-hs-b1-high-speed-dental-handpiece-bearing","title":"HP-HS-B1 High-Speed Bearing – SR144TLZWN – 3.175 × 6.35 × 2.78 mm","description":"\u003cp\u003e\u003cstrong\u003eHP-HS-B1\u003c\/strong\u003e is an independent replacement bearing for professional high-speed dental handpiece repair. It is supplied under our internal HP reference so technicians can compare it with the original bearing before ordering.\u003c\/p\u003e\u003csection data-seo-geo=\"quick-answer\"\u003e\u003ch2\u003eQuick Answer\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eHP-HS-B1\u003c\/strong\u003e is a SR144TLZWN high-speed dental handpiece bearing measuring 3.175 × 6.35 × 2.78 mm (ID × OD × W). It uses 440C rings + Torlon polyimide cage + Si3N4 ceramic balls and is rated above 400,000 RPM. Match the code, all three dimensions and construction details before ordering.\u003c\/p\u003e\u003c\/section\u003e\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eInternal SKU\u003c\/th\u003e\n\u003ctd\u003eHP-HS-B1\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eBearing code\u003c\/th\u003e\n\u003ctd\u003eSR144TLZWN\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eDimensions\u003c\/th\u003e\n\u003ctd\u003e3.175 × 6.35 × 2.78 mm (ID × OD × W)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eRated speed\u003c\/th\u003e\n\u003ctd\u003e\u0026gt; 400,000 RPM\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eMaterial\u003c\/th\u003e\n\u003ctd\u003e440C rings + Torlon polyimide cage + Si3N4 ceramic balls\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eApplication\u003c\/th\u003e\n\u003ctd\u003eHigh-speed dental handpiece repair\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eNet weight\u003c\/th\u003e\n\u003ctd\u003e10 g\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003ePacked shipping weight\u003c\/th\u003e\n\u003ctd\u003e20 g\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\u003ch2\u003eBefore Ordering\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eMatch the bearing code and all three dimensions with the removed bearing.\u003c\/li\u003e\n\u003cli\u003eConfirm the ball and cage materials required for the repair.\u003c\/li\u003e\n\u003cli\u003eCheck shield, flange, groove and ring-width details where applicable.\u003c\/li\u003e\n\u003cli\u003eInstallation and functional testing should be completed by a qualified repair technician.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cdetails open\u003e\u003csummary\u003e\u003cstrong\u003eEnglish Bearing Code Reference\u003c\/strong\u003e\u003c\/summary\u003e\u003cp\u003eUse this table to read common high-speed handpiece bearing designations. The product-specific specifications above take priority whenever a code is not present or the construction differs.\u003c\/p\u003e\n\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth scope=\"col\"\u003eCode\u003c\/th\u003e\n\u003cth scope=\"col\"\u003eMeaning\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eS\u003c\/th\u003e\n\u003ctd\u003eMaterial-series prefix. Refer to the product-specific Material row above for the actual ring, cage and ball materials.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eF\u003c\/th\u003e\n\u003ctd\u003eThrust flange on the outer ring. With a 2.38 mm outer-ring width, the flange is 0.60 mm wide; with a 2.78 mm outer-ring width, it is 0.80 mm wide. For a grooved outer ring (G), the flange is 0.45 mm wide.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eR144\u003c\/th\u003e\n\u003ctd\u003eR144 is the basic series used in this designation. The listed dimensions for this SKU are 3.175 × 6.35 × 2.78 mm (ID × OD × W).\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eK1 \/ K2\u003c\/th\u003e\n\u003ctd\u003eAngular-contact construction. K1 indicates a separable inner ring; K2 indicates a separable outer ring. Angular-contact versions use a one-piece cage.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eTA \/ TL \/ Ti\u003c\/th\u003e\n\u003ctd\u003eCage material. TA: yellow polyimide; TL: black polyimide (Torlon); Ti: fabric-reinforced phenolic.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eK \/ G\u003c\/th\u003e\n\u003ctd\u003eOuter-ring profile. K indicates a stepped outer diameter; G indicates a grooved outer diameter.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eZ \/ Z1\u003c\/th\u003e\n\u003ctd\u003eShield configuration. Z indicates a one-sided shield; Z1 indicates an integral one-sided shield.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eW \/ W02\u003c\/th\u003e\n\u003ctd\u003eWidth code. W means both rings are 2.78 mm wide. W02 means the outer ring is 2.38 mm and the inner ring is 2.78 mm. With no width code, both rings are 2.38 mm wide.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eN\u003c\/th\u003e\n\u003ctd\u003eBall material. N indicates Si3N4 silicon-nitride ceramic balls. With no N code, the balls are 9Cr18Mo \/ AISI 440C steel.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003c\/details\u003e\u003csection data-seo-geo=\"common-questions\"\u003e\u003ch2\u003eCommon Questions\u003c\/h2\u003e\n\u003ch3\u003eWhat is HP-HS-B1?\u003c\/h3\u003e\n\u003cp\u003eHP-HS-B1 is our internal reference for a SR144TLZWN replacement bearing. Its listed size is 3.175 × 6.35 × 2.78 mm (ID × OD × W), with ceramic balls and a Torlon cage.\u003c\/p\u003e\n\u003ch3\u003eHow do I confirm that this bearing will fit?\u003c\/h3\u003e\n\u003cp\u003eCompare the bearing code and the inner diameter, outer diameter and width with the removed bearing. Then confirm any shield, flange, groove, cage and ball-material requirements. A qualified handpiece repair technician should make the final fitment decision.\u003c\/p\u003e\n\u003ch3\u003eIs this an OEM bearing?\u003c\/h3\u003e\n\u003cp\u003eNo. This is an independent third-party replacement bearing. Brand and model names, when mentioned, are used only to identify compatibility; no manufacturer affiliation or endorsement is claimed.\u003c\/p\u003e\u003c\/section\u003e\u003cnav data-related-links=\"products\" aria-label=\"Related resources\"\u003e\u003ch2\u003eRelated Resources\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"\/collections\/high-speed-handpiece-bearings\"\u003eBrowse all high-speed handpiece bearings\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/blogs\/repair-guides\"\u003eRead dental handpiece repair guides\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\u003c\/nav\u003e\u003cp\u003e\u003cstrong\u003eCompatibility notice:\u003c\/strong\u003e HP-HS-B1 is an internal reseller SKU. This is an independent third-party replacement bearing and is not manufactured, sponsored, authorized or endorsed by the handpiece manufacturer. Final fitment must be verified before installation.\u003c\/p\u003e","brand":"Handpiece Parts Hub","offers":[{"title":"Default Title","offer_id":64436784857457,"sku":"HP-HS-B1","price":3.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1033\/9893\/2849\/files\/HP-HS-B1.png?v=1787191451"},{"product_id":"hp-hs-b2-high-speed-dental-handpiece-bearing","title":"HP-HS-B2 High-Speed Bearing – SR144TLZW – 3.175 × 6.35 × 2.78 mm","description":"\u003cp\u003e\u003cstrong\u003eHP-HS-B2\u003c\/strong\u003e is an independent replacement bearing for professional high-speed dental handpiece repair. It is supplied under our internal HP reference so technicians can compare it with the original bearing before ordering.\u003c\/p\u003e\u003csection data-seo-geo=\"quick-answer\"\u003e\u003ch2\u003eQuick Answer\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eHP-HS-B2\u003c\/strong\u003e is a SR144TLZW high-speed dental handpiece bearing measuring 3.175 × 6.35 × 2.78 mm (ID × OD × W). It uses 440C rings + Torlon polyimide cage + 440C steel balls and is rated above 400,000 RPM. Match the code, all three dimensions and construction details before ordering.\u003c\/p\u003e\u003c\/section\u003e\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eInternal SKU\u003c\/th\u003e\n\u003ctd\u003eHP-HS-B2\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eBearing code\u003c\/th\u003e\n\u003ctd\u003eSR144TLZW\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eDimensions\u003c\/th\u003e\n\u003ctd\u003e3.175 × 6.35 × 2.78 mm (ID × OD × W)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eRated speed\u003c\/th\u003e\n\u003ctd\u003e\u0026gt; 400,000 RPM\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eMaterial\u003c\/th\u003e\n\u003ctd\u003e440C rings + Torlon polyimide cage + 440C steel balls\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eApplication\u003c\/th\u003e\n\u003ctd\u003eHigh-speed dental handpiece repair\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eNet weight\u003c\/th\u003e\n\u003ctd\u003e10 g\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003ePacked shipping weight\u003c\/th\u003e\n\u003ctd\u003e20 g\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\u003ch2\u003eBefore Ordering\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eMatch the bearing code and all three dimensions with the removed bearing.\u003c\/li\u003e\n\u003cli\u003eConfirm the ball and cage materials required for the repair.\u003c\/li\u003e\n\u003cli\u003eCheck shield, flange, groove and ring-width details where applicable.\u003c\/li\u003e\n\u003cli\u003eInstallation and functional testing should be completed by a qualified repair technician.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cdetails open\u003e\u003csummary\u003e\u003cstrong\u003eEnglish Bearing Code Reference\u003c\/strong\u003e\u003c\/summary\u003e\u003cp\u003eUse this table to read common high-speed handpiece bearing designations. The product-specific specifications above take priority whenever a code is not present or the construction differs.\u003c\/p\u003e\n\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth scope=\"col\"\u003eCode\u003c\/th\u003e\n\u003cth scope=\"col\"\u003eMeaning\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eS\u003c\/th\u003e\n\u003ctd\u003eMaterial-series prefix. Refer to the product-specific Material row above for the actual ring, cage and ball materials.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eF\u003c\/th\u003e\n\u003ctd\u003eThrust flange on the outer ring. With a 2.38 mm outer-ring width, the flange is 0.60 mm wide; with a 2.78 mm outer-ring width, it is 0.80 mm wide. For a grooved outer ring (G), the flange is 0.45 mm wide.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eR144\u003c\/th\u003e\n\u003ctd\u003eR144 is the basic series used in this designation. The listed dimensions for this SKU are 3.175 × 6.35 × 2.78 mm (ID × OD × W).\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eK1 \/ K2\u003c\/th\u003e\n\u003ctd\u003eAngular-contact construction. K1 indicates a separable inner ring; K2 indicates a separable outer ring. Angular-contact versions use a one-piece cage.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eTA \/ TL \/ Ti\u003c\/th\u003e\n\u003ctd\u003eCage material. TA: yellow polyimide; TL: black polyimide (Torlon); Ti: fabric-reinforced phenolic.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eK \/ G\u003c\/th\u003e\n\u003ctd\u003eOuter-ring profile. K indicates a stepped outer diameter; G indicates a grooved outer diameter.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eZ \/ Z1\u003c\/th\u003e\n\u003ctd\u003eShield configuration. Z indicates a one-sided shield; Z1 indicates an integral one-sided shield.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eW \/ W02\u003c\/th\u003e\n\u003ctd\u003eWidth code. W means both rings are 2.78 mm wide. W02 means the outer ring is 2.38 mm and the inner ring is 2.78 mm. With no width code, both rings are 2.38 mm wide.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eN\u003c\/th\u003e\n\u003ctd\u003eBall material. N indicates Si3N4 silicon-nitride ceramic balls. With no N code, the balls are 9Cr18Mo \/ AISI 440C steel.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003c\/details\u003e\u003csection data-seo-geo=\"common-questions\"\u003e\u003ch2\u003eCommon Questions\u003c\/h2\u003e\n\u003ch3\u003eWhat is HP-HS-B2?\u003c\/h3\u003e\n\u003cp\u003eHP-HS-B2 is our internal reference for a SR144TLZW replacement bearing. Its listed size is 3.175 × 6.35 × 2.78 mm (ID × OD × W), with steel balls and a Torlon cage.\u003c\/p\u003e\n\u003ch3\u003eHow do I confirm that this bearing will fit?\u003c\/h3\u003e\n\u003cp\u003eCompare the bearing code and the inner diameter, outer diameter and width with the removed bearing. Then confirm any shield, flange, groove, cage and ball-material requirements. A qualified handpiece repair technician should make the final fitment decision.\u003c\/p\u003e\n\u003ch3\u003eIs this an OEM bearing?\u003c\/h3\u003e\n\u003cp\u003eNo. This is an independent third-party replacement bearing. Brand and model names, when mentioned, are used only to identify compatibility; no manufacturer affiliation or endorsement is claimed.\u003c\/p\u003e\u003c\/section\u003e\u003cnav data-related-links=\"products\" aria-label=\"Related resources\"\u003e\u003ch2\u003eRelated Resources\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"\/collections\/high-speed-handpiece-bearings\"\u003eBrowse all high-speed handpiece bearings\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/blogs\/repair-guides\"\u003eRead dental handpiece repair guides\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\u003c\/nav\u003e\u003cp\u003e\u003cstrong\u003eCompatibility notice:\u003c\/strong\u003e HP-HS-B2 is an internal reseller SKU. This is an independent third-party replacement bearing and is not manufactured, sponsored, authorized or endorsed by the handpiece manufacturer. Final fitment must be verified before installation.\u003c\/p\u003e","brand":"Handpiece Parts Hub","offers":[{"title":"Default Title","offer_id":64436784922993,"sku":"HP-HS-B2","price":3.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1033\/9893\/2849\/files\/HP-HS-B2.png?v=1787191451"},{"product_id":"hp-hs-b3-high-speed-dental-handpiece-bearing","title":"HP-HS-B3 High-Speed Bearing – SR144TiZWN – 3.175 × 6.35 × 2.78 mm","description":"\u003cp\u003e\u003cstrong\u003eHP-HS-B3\u003c\/strong\u003e is an independent replacement bearing for professional high-speed dental handpiece repair. It is supplied under our internal HP reference so technicians can compare it with the original bearing before ordering.\u003c\/p\u003e\u003csection data-seo-geo=\"quick-answer\"\u003e\u003ch2\u003eQuick Answer\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eHP-HS-B3\u003c\/strong\u003e is a SR144TiZWN high-speed dental handpiece bearing measuring 3.175 × 6.35 × 2.78 mm (ID × OD × W). It uses 440C rings + fabric-reinforced phenolic cage + Si3N4 ceramic balls and is rated above 400,000 RPM. Match the code, all three dimensions and construction details before ordering.\u003c\/p\u003e\u003c\/section\u003e\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eInternal SKU\u003c\/th\u003e\n\u003ctd\u003eHP-HS-B3\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eBearing code\u003c\/th\u003e\n\u003ctd\u003eSR144TiZWN\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eDimensions\u003c\/th\u003e\n\u003ctd\u003e3.175 × 6.35 × 2.78 mm (ID × OD × W)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eRated speed\u003c\/th\u003e\n\u003ctd\u003e\u0026gt; 400,000 RPM\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eMaterial\u003c\/th\u003e\n\u003ctd\u003e440C rings + fabric-reinforced phenolic cage + Si3N4 ceramic balls\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eApplication\u003c\/th\u003e\n\u003ctd\u003eHigh-speed dental handpiece repair\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eNet weight\u003c\/th\u003e\n\u003ctd\u003e10 g\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003ePacked shipping weight\u003c\/th\u003e\n\u003ctd\u003e20 g\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\u003ch2\u003eBefore Ordering\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eMatch the bearing code and all three dimensions with the removed bearing.\u003c\/li\u003e\n\u003cli\u003eConfirm the ball and cage materials required for the repair.\u003c\/li\u003e\n\u003cli\u003eCheck shield, flange, groove and ring-width details where applicable.\u003c\/li\u003e\n\u003cli\u003eInstallation and functional testing should be completed by a qualified repair technician.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cdetails open\u003e\u003csummary\u003e\u003cstrong\u003eEnglish Bearing Code Reference\u003c\/strong\u003e\u003c\/summary\u003e\u003cp\u003eUse this table to read common high-speed handpiece bearing designations. The product-specific specifications above take priority whenever a code is not present or the construction differs.\u003c\/p\u003e\n\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth scope=\"col\"\u003eCode\u003c\/th\u003e\n\u003cth scope=\"col\"\u003eMeaning\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eS\u003c\/th\u003e\n\u003ctd\u003eMaterial-series prefix. Refer to the product-specific Material row above for the actual ring, cage and ball materials.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eF\u003c\/th\u003e\n\u003ctd\u003eThrust flange on the outer ring. With a 2.38 mm outer-ring width, the flange is 0.60 mm wide; with a 2.78 mm outer-ring width, it is 0.80 mm wide. For a grooved outer ring (G), the flange is 0.45 mm wide.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eR144\u003c\/th\u003e\n\u003ctd\u003eR144 is the basic series used in this designation. The listed dimensions for this SKU are 3.175 × 6.35 × 2.78 mm (ID × OD × W).\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eK1 \/ K2\u003c\/th\u003e\n\u003ctd\u003eAngular-contact construction. K1 indicates a separable inner ring; K2 indicates a separable outer ring. Angular-contact versions use a one-piece cage.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eTA \/ TL \/ Ti\u003c\/th\u003e\n\u003ctd\u003eCage material. TA: yellow polyimide; TL: black polyimide (Torlon); Ti: fabric-reinforced phenolic.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eK \/ G\u003c\/th\u003e\n\u003ctd\u003eOuter-ring profile. K indicates a stepped outer diameter; G indicates a grooved outer diameter.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eZ \/ Z1\u003c\/th\u003e\n\u003ctd\u003eShield configuration. Z indicates a one-sided shield; Z1 indicates an integral one-sided shield.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eW \/ W02\u003c\/th\u003e\n\u003ctd\u003eWidth code. W means both rings are 2.78 mm wide. W02 means the outer ring is 2.38 mm and the inner ring is 2.78 mm. With no width code, both rings are 2.38 mm wide.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eN\u003c\/th\u003e\n\u003ctd\u003eBall material. N indicates Si3N4 silicon-nitride ceramic balls. With no N code, the balls are 9Cr18Mo \/ AISI 440C steel.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003c\/details\u003e\u003csection data-seo-geo=\"common-questions\"\u003e\u003ch2\u003eCommon Questions\u003c\/h2\u003e\n\u003ch3\u003eWhat is HP-HS-B3?\u003c\/h3\u003e\n\u003cp\u003eHP-HS-B3 is our internal reference for a SR144TiZWN replacement bearing. Its listed size is 3.175 × 6.35 × 2.78 mm (ID × OD × W), with ceramic balls and a phenolic cage.\u003c\/p\u003e\n\u003ch3\u003eHow do I confirm that this bearing will fit?\u003c\/h3\u003e\n\u003cp\u003eCompare the bearing code and the inner diameter, outer diameter and width with the removed bearing. Then confirm any shield, flange, groove, cage and ball-material requirements. A qualified handpiece repair technician should make the final fitment decision.\u003c\/p\u003e\n\u003ch3\u003eIs this an OEM bearing?\u003c\/h3\u003e\n\u003cp\u003eNo. This is an independent third-party replacement bearing. Brand and model names, when mentioned, are used only to identify compatibility; no manufacturer affiliation or endorsement is claimed.\u003c\/p\u003e\u003c\/section\u003e\u003cnav data-related-links=\"products\" aria-label=\"Related resources\"\u003e\u003ch2\u003eRelated Resources\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"\/collections\/high-speed-handpiece-bearings\"\u003eBrowse all high-speed handpiece bearings\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/blogs\/repair-guides\"\u003eRead dental handpiece repair guides\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\u003c\/nav\u003e\u003cp\u003e\u003cstrong\u003eCompatibility notice:\u003c\/strong\u003e HP-HS-B3 is an internal reseller SKU. This is an independent third-party replacement bearing and is not manufactured, sponsored, authorized or endorsed by the handpiece manufacturer. Final fitment must be verified before installation.\u003c\/p\u003e","brand":"Handpiece Parts Hub","offers":[{"title":"Default Title","offer_id":64436784955761,"sku":"HP-HS-B3","price":3.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1033\/9893\/2849\/files\/HP-HS-B3.png?v=1787191451"},{"product_id":"hp-hs-b4-high-speed-dental-handpiece-bearing","title":"HP-HS-B4 High-Speed Bearing – SR144TLZ1WN – 3.175 × 6.35 × 2.78 mm","description":"\u003cp\u003e\u003cstrong\u003eHP-HS-B4\u003c\/strong\u003e is an independent replacement bearing for professional high-speed dental handpiece repair. It is supplied under our internal HP reference so technicians can compare it with the original bearing before ordering.\u003c\/p\u003e\u003csection data-seo-geo=\"quick-answer\"\u003e\u003ch2\u003eQuick Answer\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eHP-HS-B4\u003c\/strong\u003e is a SR144TLZ1WN high-speed dental handpiece bearing measuring 3.175 × 6.35 × 2.78 mm (ID × OD × W). It uses 440C rings + Torlon polyimide cage + Si3N4 ceramic balls and is rated above 400,000 RPM. Match the code, all three dimensions and construction details before ordering.\u003c\/p\u003e\u003c\/section\u003e\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eInternal SKU\u003c\/th\u003e\n\u003ctd\u003eHP-HS-B4\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eBearing code\u003c\/th\u003e\n\u003ctd\u003eSR144TLZ1WN\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eDimensions\u003c\/th\u003e\n\u003ctd\u003e3.175 × 6.35 × 2.78 mm (ID × OD × W)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eRated speed\u003c\/th\u003e\n\u003ctd\u003e\u0026gt; 400,000 RPM\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eMaterial\u003c\/th\u003e\n\u003ctd\u003e440C rings + Torlon polyimide cage + Si3N4 ceramic balls\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eApplication\u003c\/th\u003e\n\u003ctd\u003eHigh-speed dental handpiece repair\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eNet weight\u003c\/th\u003e\n\u003ctd\u003e10 g\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003ePacked shipping weight\u003c\/th\u003e\n\u003ctd\u003e20 g\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\u003ch2\u003eBefore Ordering\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eMatch the bearing code and all three dimensions with the removed bearing.\u003c\/li\u003e\n\u003cli\u003eConfirm the ball and cage materials required for the repair.\u003c\/li\u003e\n\u003cli\u003eCheck shield, flange, groove and ring-width details where applicable.\u003c\/li\u003e\n\u003cli\u003eInstallation and functional testing should be completed by a qualified repair technician.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cdetails open\u003e\u003csummary\u003e\u003cstrong\u003eEnglish Bearing Code Reference\u003c\/strong\u003e\u003c\/summary\u003e\u003cp\u003eUse this table to read common high-speed handpiece bearing designations. The product-specific specifications above take priority whenever a code is not present or the construction differs.\u003c\/p\u003e\n\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth scope=\"col\"\u003eCode\u003c\/th\u003e\n\u003cth scope=\"col\"\u003eMeaning\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eS\u003c\/th\u003e\n\u003ctd\u003eMaterial-series prefix. Refer to the product-specific Material row above for the actual ring, cage and ball materials.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eF\u003c\/th\u003e\n\u003ctd\u003eThrust flange on the outer ring. With a 2.38 mm outer-ring width, the flange is 0.60 mm wide; with a 2.78 mm outer-ring width, it is 0.80 mm wide. For a grooved outer ring (G), the flange is 0.45 mm wide.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eR144\u003c\/th\u003e\n\u003ctd\u003eR144 is the basic series used in this designation. The listed dimensions for this SKU are 3.175 × 6.35 × 2.78 mm (ID × OD × W).\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eK1 \/ K2\u003c\/th\u003e\n\u003ctd\u003eAngular-contact construction. K1 indicates a separable inner ring; K2 indicates a separable outer ring. Angular-contact versions use a one-piece cage.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eTA \/ TL \/ Ti\u003c\/th\u003e\n\u003ctd\u003eCage material. TA: yellow polyimide; TL: black polyimide (Torlon); Ti: fabric-reinforced phenolic.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eK \/ G\u003c\/th\u003e\n\u003ctd\u003eOuter-ring profile. K indicates a stepped outer diameter; G indicates a grooved outer diameter.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eZ \/ Z1\u003c\/th\u003e\n\u003ctd\u003eShield configuration. Z indicates a one-sided shield; Z1 indicates an integral one-sided shield.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eW \/ W02\u003c\/th\u003e\n\u003ctd\u003eWidth code. W means both rings are 2.78 mm wide. W02 means the outer ring is 2.38 mm and the inner ring is 2.78 mm. With no width code, both rings are 2.38 mm wide.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eN\u003c\/th\u003e\n\u003ctd\u003eBall material. N indicates Si3N4 silicon-nitride ceramic balls. With no N code, the balls are 9Cr18Mo \/ AISI 440C steel.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003c\/details\u003e\u003csection data-seo-geo=\"common-questions\"\u003e\u003ch2\u003eCommon Questions\u003c\/h2\u003e\n\u003ch3\u003eWhat is HP-HS-B4?\u003c\/h3\u003e\n\u003cp\u003eHP-HS-B4 is our internal reference for a SR144TLZ1WN replacement bearing. Its listed size is 3.175 × 6.35 × 2.78 mm (ID × OD × W), with ceramic balls and a Torlon cage.\u003c\/p\u003e\n\u003ch3\u003eHow do I confirm that this bearing will fit?\u003c\/h3\u003e\n\u003cp\u003eCompare the bearing code and the inner diameter, outer diameter and width with the removed bearing. Then confirm any shield, flange, groove, cage and ball-material requirements. A qualified handpiece repair technician should make the final fitment decision.\u003c\/p\u003e\n\u003ch3\u003eIs this an OEM bearing?\u003c\/h3\u003e\n\u003cp\u003eNo. This is an independent third-party replacement bearing. Brand and model names, when mentioned, are used only to identify compatibility; no manufacturer affiliation or endorsement is claimed.\u003c\/p\u003e\u003c\/section\u003e\u003cnav data-related-links=\"products\" aria-label=\"Related resources\"\u003e\u003ch2\u003eRelated Resources\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"\/collections\/high-speed-handpiece-bearings\"\u003eBrowse all high-speed handpiece bearings\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/blogs\/repair-guides\"\u003eRead dental handpiece repair guides\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\u003c\/nav\u003e\u003cp\u003e\u003cstrong\u003eCompatibility notice:\u003c\/strong\u003e HP-HS-B4 is an internal reseller SKU. This is an independent third-party replacement bearing and is not manufactured, sponsored, authorized or endorsed by the handpiece manufacturer. Final fitment must be verified before installation.\u003c\/p\u003e","brand":"Handpiece Parts Hub","offers":[{"title":"Default Title","offer_id":64436784988529,"sku":"HP-HS-B4","price":3.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1033\/9893\/2849\/files\/HP-HS-B4.png?v=1787191451"},{"product_id":"hp-hs-b5-high-speed-dental-handpiece-bearing","title":"HP-HS-B5 High-Speed Bearing – SR144TiZ1WN – 3.175 × 6.35 × 2.78 mm","description":"\u003cp\u003e\u003cstrong\u003eHP-HS-B5\u003c\/strong\u003e is an independent replacement bearing for professional high-speed dental handpiece repair. It is supplied under our internal HP reference so technicians can compare it with the original bearing before ordering.\u003c\/p\u003e\u003csection data-seo-geo=\"quick-answer\"\u003e\u003ch2\u003eQuick Answer\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eHP-HS-B5\u003c\/strong\u003e is a SR144TiZ1WN high-speed dental handpiece bearing measuring 3.175 × 6.35 × 2.78 mm (ID × OD × W). It uses 440C rings + fabric-reinforced phenolic cage + Si3N4 ceramic balls and is rated above 400,000 RPM. Match the code, all three dimensions and construction details before ordering.\u003c\/p\u003e\u003c\/section\u003e\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eInternal SKU\u003c\/th\u003e\n\u003ctd\u003eHP-HS-B5\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eBearing code\u003c\/th\u003e\n\u003ctd\u003eSR144TiZ1WN\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eDimensions\u003c\/th\u003e\n\u003ctd\u003e3.175 × 6.35 × 2.78 mm (ID × OD × W)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eRated speed\u003c\/th\u003e\n\u003ctd\u003e\u0026gt; 400,000 RPM\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eMaterial\u003c\/th\u003e\n\u003ctd\u003e440C rings + fabric-reinforced phenolic cage + Si3N4 ceramic balls\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eApplication\u003c\/th\u003e\n\u003ctd\u003eHigh-speed dental handpiece repair\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eNet weight\u003c\/th\u003e\n\u003ctd\u003e10 g\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003ePacked shipping weight\u003c\/th\u003e\n\u003ctd\u003e20 g\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\u003ch2\u003eBefore Ordering\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eMatch the bearing code and all three dimensions with the removed bearing.\u003c\/li\u003e\n\u003cli\u003eConfirm the ball and cage materials required for the repair.\u003c\/li\u003e\n\u003cli\u003eCheck shield, flange, groove and ring-width details where applicable.\u003c\/li\u003e\n\u003cli\u003eInstallation and functional testing should be completed by a qualified repair technician.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cdetails open\u003e\u003csummary\u003e\u003cstrong\u003eEnglish Bearing Code Reference\u003c\/strong\u003e\u003c\/summary\u003e\u003cp\u003eUse this table to read common high-speed handpiece bearing designations. The product-specific specifications above take priority whenever a code is not present or the construction differs.\u003c\/p\u003e\n\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth scope=\"col\"\u003eCode\u003c\/th\u003e\n\u003cth scope=\"col\"\u003eMeaning\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eS\u003c\/th\u003e\n\u003ctd\u003eMaterial-series prefix. Refer to the product-specific Material row above for the actual ring, cage and ball materials.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eF\u003c\/th\u003e\n\u003ctd\u003eThrust flange on the outer ring. With a 2.38 mm outer-ring width, the flange is 0.60 mm wide; with a 2.78 mm outer-ring width, it is 0.80 mm wide. For a grooved outer ring (G), the flange is 0.45 mm wide.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eR144\u003c\/th\u003e\n\u003ctd\u003eR144 is the basic series used in this designation. The listed dimensions for this SKU are 3.175 × 6.35 × 2.78 mm (ID × OD × W).\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eK1 \/ K2\u003c\/th\u003e\n\u003ctd\u003eAngular-contact construction. K1 indicates a separable inner ring; K2 indicates a separable outer ring. Angular-contact versions use a one-piece cage.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eTA \/ TL \/ Ti\u003c\/th\u003e\n\u003ctd\u003eCage material. TA: yellow polyimide; TL: black polyimide (Torlon); Ti: fabric-reinforced phenolic.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eK \/ G\u003c\/th\u003e\n\u003ctd\u003eOuter-ring profile. K indicates a stepped outer diameter; G indicates a grooved outer diameter.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eZ \/ Z1\u003c\/th\u003e\n\u003ctd\u003eShield configuration. Z indicates a one-sided shield; Z1 indicates an integral one-sided shield.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eW \/ W02\u003c\/th\u003e\n\u003ctd\u003eWidth code. W means both rings are 2.78 mm wide. W02 means the outer ring is 2.38 mm and the inner ring is 2.78 mm. With no width code, both rings are 2.38 mm wide.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eN\u003c\/th\u003e\n\u003ctd\u003eBall material. N indicates Si3N4 silicon-nitride ceramic balls. With no N code, the balls are 9Cr18Mo \/ AISI 440C steel.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003c\/details\u003e\u003csection data-seo-geo=\"common-questions\"\u003e\u003ch2\u003eCommon Questions\u003c\/h2\u003e\n\u003ch3\u003eWhat is HP-HS-B5?\u003c\/h3\u003e\n\u003cp\u003eHP-HS-B5 is our internal reference for a SR144TiZ1WN replacement bearing. Its listed size is 3.175 × 6.35 × 2.78 mm (ID × OD × W), with ceramic balls and a phenolic cage.\u003c\/p\u003e\n\u003ch3\u003eHow do I confirm that this bearing will fit?\u003c\/h3\u003e\n\u003cp\u003eCompare the bearing code and the inner diameter, outer diameter and width with the removed bearing. Then confirm any shield, flange, groove, cage and ball-material requirements. A qualified handpiece repair technician should make the final fitment decision.\u003c\/p\u003e\n\u003ch3\u003eIs this an OEM bearing?\u003c\/h3\u003e\n\u003cp\u003eNo. This is an independent third-party replacement bearing. Brand and model names, when mentioned, are used only to identify compatibility; no manufacturer affiliation or endorsement is claimed.\u003c\/p\u003e\u003c\/section\u003e\u003cnav data-related-links=\"products\" aria-label=\"Related resources\"\u003e\u003ch2\u003eRelated Resources\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"\/collections\/high-speed-handpiece-bearings\"\u003eBrowse all high-speed handpiece bearings\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/blogs\/repair-guides\"\u003eRead dental handpiece repair guides\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\u003c\/nav\u003e\u003cp\u003e\u003cstrong\u003eCompatibility notice:\u003c\/strong\u003e HP-HS-B5 is an internal reseller SKU. This is an independent third-party replacement bearing and is not manufactured, sponsored, authorized or endorsed by the handpiece manufacturer. Final fitment must be verified before installation.\u003c\/p\u003e","brand":"Handpiece Parts Hub","offers":[{"title":"Default Title","offer_id":64436785021297,"sku":"HP-HS-B5","price":3.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1033\/9893\/2849\/files\/HP-HS-B5.png?v=1787191451"},{"product_id":"hp-hs-v1-high-speed-dental-handpiece-bearing","title":"HP-HS-V1 High-Speed Bearing – 3.4×6.5×1.6 TLN – 3.4 × 6.5 × 1.6 mm","description":"\u003cp\u003e\u003cstrong\u003eHP-HS-V1\u003c\/strong\u003e is an independent replacement bearing for professional high-speed dental handpiece repair. It is supplied under our internal HP reference so technicians can compare it with the original bearing before ordering.\u003c\/p\u003e\u003csection data-seo-geo=\"quick-answer\"\u003e\u003ch2\u003eQuick Answer\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eHP-HS-V1\u003c\/strong\u003e is a 3.4×6.5×1.6 TLN high-speed dental handpiece bearing measuring 3.4 × 6.5 × 1.6 mm (ID × OD × W). It uses 440C rings + Torlon polyimide cage + Si3N4 ceramic balls and is rated above 400,000 RPM. Match the code, all three dimensions and construction details before ordering.\u003c\/p\u003e\u003c\/section\u003e\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eInternal SKU\u003c\/th\u003e\n\u003ctd\u003eHP-HS-V1\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eBearing code\u003c\/th\u003e\n\u003ctd\u003e3.4×6.5×1.6 TLN\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eDimensions\u003c\/th\u003e\n\u003ctd\u003e3.4 × 6.5 × 1.6 mm (ID × OD × W)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eRated speed\u003c\/th\u003e\n\u003ctd\u003e\u0026gt; 400,000 RPM\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eMaterial\u003c\/th\u003e\n\u003ctd\u003e440C rings + Torlon polyimide cage + Si3N4 ceramic balls\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eApplication\u003c\/th\u003e\n\u003ctd\u003eHigh-speed dental handpiece repair\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eNet weight\u003c\/th\u003e\n\u003ctd\u003e10 g\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003ePacked shipping weight\u003c\/th\u003e\n\u003ctd\u003e20 g\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\u003ch2\u003eBefore Ordering\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eMatch the bearing code and all three dimensions with the removed bearing.\u003c\/li\u003e\n\u003cli\u003eConfirm the ball and cage materials required for the repair.\u003c\/li\u003e\n\u003cli\u003eCheck shield, flange, groove and ring-width details where applicable.\u003c\/li\u003e\n\u003cli\u003eInstallation and functional testing should be completed by a qualified repair technician.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cdetails open\u003e\u003csummary\u003e\u003cstrong\u003eEnglish Bearing Code Reference\u003c\/strong\u003e\u003c\/summary\u003e\u003cp\u003eUse this table to read common high-speed handpiece bearing designations. The product-specific specifications above take priority whenever a code is not present or the construction differs.\u003c\/p\u003e\n\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth scope=\"col\"\u003eCode\u003c\/th\u003e\n\u003cth scope=\"col\"\u003eMeaning\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eS\u003c\/th\u003e\n\u003ctd\u003eMaterial-series prefix. Refer to the product-specific Material row above for the actual ring, cage and ball materials.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eF\u003c\/th\u003e\n\u003ctd\u003eThrust flange on the outer ring. With a 2.38 mm outer-ring width, the flange is 0.60 mm wide; with a 2.78 mm outer-ring width, it is 0.80 mm wide. For a grooved outer ring (G), the flange is 0.45 mm wide.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eBasic designation\u003c\/th\u003e\n\u003ctd\u003eThis SKU uses a dimension- or application-based designation. Confirm the listed dimensions: 3.4 × 6.5 × 1.6 mm (ID × OD × W).\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eK1 \/ K2\u003c\/th\u003e\n\u003ctd\u003eAngular-contact construction. K1 indicates a separable inner ring; K2 indicates a separable outer ring. Angular-contact versions use a one-piece cage.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eTA \/ TL \/ Ti\u003c\/th\u003e\n\u003ctd\u003eCage material. TA: yellow polyimide; TL: black polyimide (Torlon); Ti: fabric-reinforced phenolic.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eK \/ G\u003c\/th\u003e\n\u003ctd\u003eOuter-ring profile. K indicates a stepped outer diameter; G indicates a grooved outer diameter.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eZ \/ Z1\u003c\/th\u003e\n\u003ctd\u003eShield configuration. Z indicates a one-sided shield; Z1 indicates an integral one-sided shield.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eW \/ W02\u003c\/th\u003e\n\u003ctd\u003eWidth code. W means both rings are 2.78 mm wide. W02 means the outer ring is 2.38 mm and the inner ring is 2.78 mm. With no width code, both rings are 2.38 mm wide.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eN\u003c\/th\u003e\n\u003ctd\u003eBall material. N indicates Si3N4 silicon-nitride ceramic balls. With no N code, the balls are 9Cr18Mo \/ AISI 440C steel.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003c\/details\u003e\u003csection data-seo-geo=\"common-questions\"\u003e\u003ch2\u003eCommon Questions\u003c\/h2\u003e\n\u003ch3\u003eWhat is HP-HS-V1?\u003c\/h3\u003e\n\u003cp\u003eHP-HS-V1 is our internal reference for a 3.4×6.5×1.6 TLN replacement bearing. Its listed size is 3.4 × 6.5 × 1.6 mm (ID × OD × W), with ceramic balls and a Torlon cage.\u003c\/p\u003e\n\u003ch3\u003eHow do I confirm that this bearing will fit?\u003c\/h3\u003e\n\u003cp\u003eCompare the bearing code and the inner diameter, outer diameter and width with the removed bearing. Then confirm any shield, flange, groove, cage and ball-material requirements. A qualified handpiece repair technician should make the final fitment decision.\u003c\/p\u003e\n\u003ch3\u003eIs this an OEM bearing?\u003c\/h3\u003e\n\u003cp\u003eNo. This is an independent third-party replacement bearing. Brand and model names, when mentioned, are used only to identify compatibility; no manufacturer affiliation or endorsement is claimed.\u003c\/p\u003e\u003c\/section\u003e\u003cnav data-related-links=\"products\" aria-label=\"Related resources\"\u003e\u003ch2\u003eRelated Resources\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"\/collections\/high-speed-handpiece-bearings\"\u003eBrowse all high-speed handpiece bearings\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/blogs\/repair-guides\"\u003eRead dental handpiece repair guides\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\u003c\/nav\u003e\u003cp\u003e\u003cstrong\u003eCompatibility notice:\u003c\/strong\u003e HP-HS-V1 is an internal reseller SKU. This is an independent third-party replacement bearing and is not manufactured, sponsored, authorized or endorsed by the handpiece manufacturer. Final fitment must be verified before installation.\u003c\/p\u003e","brand":"Handpiece Parts Hub","offers":[{"title":"Default Title","offer_id":64436785054065,"sku":"HP-HS-V1","price":3.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1033\/9893\/2849\/files\/HP-HS-V1.png?v=1787191451"},{"product_id":"hp-hs-c1-high-speed-dental-handpiece-bearing","title":"HP-HS-C1 High-Speed Bearing – SR144TLKZN – 3.175 × 6.35 × 2.38 mm","description":"\u003cp\u003e\u003cstrong\u003eHP-HS-C1\u003c\/strong\u003e is an independent replacement bearing for professional high-speed dental handpiece repair. It is supplied under our internal HP reference so technicians can compare it with the original bearing before ordering.\u003c\/p\u003e\u003csection data-seo-geo=\"quick-answer\"\u003e\u003ch2\u003eQuick Answer\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eHP-HS-C1\u003c\/strong\u003e is a SR144TLKZN high-speed dental handpiece bearing measuring 3.175 × 6.35 × 2.38 mm (ID × OD × W). It uses 440C rings + Torlon polyimide cage + Si3N4 ceramic balls and is rated above 400,000 RPM. Match the code, all three dimensions and construction details before ordering.\u003c\/p\u003e\u003c\/section\u003e\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eInternal SKU\u003c\/th\u003e\n\u003ctd\u003eHP-HS-C1\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eBearing code\u003c\/th\u003e\n\u003ctd\u003eSR144TLKZN\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eDimensions\u003c\/th\u003e\n\u003ctd\u003e3.175 × 6.35 × 2.38 mm (ID × OD × W)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eRated speed\u003c\/th\u003e\n\u003ctd\u003e\u0026gt; 400,000 RPM\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eMaterial\u003c\/th\u003e\n\u003ctd\u003e440C rings + Torlon polyimide cage + Si3N4 ceramic balls\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eApplication\u003c\/th\u003e\n\u003ctd\u003eHigh-speed dental handpiece repair\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eNet weight\u003c\/th\u003e\n\u003ctd\u003e10 g\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003ePacked shipping weight\u003c\/th\u003e\n\u003ctd\u003e20 g\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\u003ch2\u003eBefore Ordering\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eMatch the bearing code and all three dimensions with the removed bearing.\u003c\/li\u003e\n\u003cli\u003eConfirm the ball and cage materials required for the repair.\u003c\/li\u003e\n\u003cli\u003eCheck shield, flange, groove and ring-width details where applicable.\u003c\/li\u003e\n\u003cli\u003eInstallation and functional testing should be completed by a qualified repair technician.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cdetails open\u003e\u003csummary\u003e\u003cstrong\u003eEnglish Bearing Code Reference\u003c\/strong\u003e\u003c\/summary\u003e\u003cp\u003eUse this table to read common high-speed handpiece bearing designations. The product-specific specifications above take priority whenever a code is not present or the construction differs.\u003c\/p\u003e\n\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth scope=\"col\"\u003eCode\u003c\/th\u003e\n\u003cth scope=\"col\"\u003eMeaning\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eS\u003c\/th\u003e\n\u003ctd\u003eMaterial-series prefix. Refer to the product-specific Material row above for the actual ring, cage and ball materials.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eF\u003c\/th\u003e\n\u003ctd\u003eThrust flange on the outer ring. With a 2.38 mm outer-ring width, the flange is 0.60 mm wide; with a 2.78 mm outer-ring width, it is 0.80 mm wide. For a grooved outer ring (G), the flange is 0.45 mm wide.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eR144\u003c\/th\u003e\n\u003ctd\u003eR144 is the basic series used in this designation. The listed dimensions for this SKU are 3.175 × 6.35 × 2.38 mm (ID × OD × W).\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eK1 \/ K2\u003c\/th\u003e\n\u003ctd\u003eAngular-contact construction. K1 indicates a separable inner ring; K2 indicates a separable outer ring. Angular-contact versions use a one-piece cage.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eTA \/ TL \/ Ti\u003c\/th\u003e\n\u003ctd\u003eCage material. TA: yellow polyimide; TL: black polyimide (Torlon); Ti: fabric-reinforced phenolic.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eK \/ G\u003c\/th\u003e\n\u003ctd\u003eOuter-ring profile. K indicates a stepped outer diameter; G indicates a grooved outer diameter.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eZ \/ Z1\u003c\/th\u003e\n\u003ctd\u003eShield configuration. Z indicates a one-sided shield; Z1 indicates an integral one-sided shield.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eW \/ W02\u003c\/th\u003e\n\u003ctd\u003eWidth code. W means both rings are 2.78 mm wide. W02 means the outer ring is 2.38 mm and the inner ring is 2.78 mm. With no width code, both rings are 2.38 mm wide.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eN\u003c\/th\u003e\n\u003ctd\u003eBall material. N indicates Si3N4 silicon-nitride ceramic balls. With no N code, the balls are 9Cr18Mo \/ AISI 440C steel.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003c\/details\u003e\u003csection data-seo-geo=\"common-questions\"\u003e\u003ch2\u003eCommon Questions\u003c\/h2\u003e\n\u003ch3\u003eWhat is HP-HS-C1?\u003c\/h3\u003e\n\u003cp\u003eHP-HS-C1 is our internal reference for a SR144TLKZN replacement bearing. Its listed size is 3.175 × 6.35 × 2.38 mm (ID × OD × W), with ceramic balls and a Torlon cage.\u003c\/p\u003e\n\u003ch3\u003eHow do I confirm that this bearing will fit?\u003c\/h3\u003e\n\u003cp\u003eCompare the bearing code and the inner diameter, outer diameter and width with the removed bearing. Then confirm any shield, flange, groove, cage and ball-material requirements. A qualified handpiece repair technician should make the final fitment decision.\u003c\/p\u003e\n\u003ch3\u003eIs this an OEM bearing?\u003c\/h3\u003e\n\u003cp\u003eNo. This is an independent third-party replacement bearing. Brand and model names, when mentioned, are used only to identify compatibility; no manufacturer affiliation or endorsement is claimed.\u003c\/p\u003e\u003c\/section\u003e\u003cnav data-related-links=\"products\" aria-label=\"Related resources\"\u003e\u003ch2\u003eRelated Resources\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"\/collections\/high-speed-handpiece-bearings\"\u003eBrowse all high-speed handpiece bearings\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/blogs\/repair-guides\"\u003eRead dental handpiece repair guides\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\u003c\/nav\u003e\u003cp\u003e\u003cstrong\u003eCompatibility notice:\u003c\/strong\u003e HP-HS-C1 is an internal reseller SKU. This is an independent third-party replacement bearing and is not manufactured, sponsored, authorized or endorsed by the handpiece manufacturer. Final fitment must be verified before installation.\u003c\/p\u003e","brand":"Handpiece Parts Hub","offers":[{"title":"Default Title","offer_id":64436785086833,"sku":"HP-HS-C1","price":4.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1033\/9893\/2849\/files\/HP-HS-C1.png?v=1787191451"},{"product_id":"hp-hs-c2-high-speed-dental-handpiece-bearing","title":"HP-HS-C2 High-Speed Bearing – SR144TiKZN – 3.175 × 6.35 × 2.38 mm","description":"\u003cp\u003e\u003cstrong\u003eHP-HS-C2\u003c\/strong\u003e is an independent replacement bearing for professional high-speed dental handpiece repair. It is supplied under our internal HP reference so technicians can compare it with the original bearing before ordering.\u003c\/p\u003e\u003csection data-seo-geo=\"quick-answer\"\u003e\u003ch2\u003eQuick Answer\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eHP-HS-C2\u003c\/strong\u003e is a SR144TiKZN high-speed dental handpiece bearing measuring 3.175 × 6.35 × 2.38 mm (ID × OD × W). It uses 440C rings + fabric-reinforced phenolic cage + Si3N4 ceramic balls and is rated above 400,000 RPM. Match the code, all three dimensions and construction details before ordering.\u003c\/p\u003e\u003c\/section\u003e\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eInternal SKU\u003c\/th\u003e\n\u003ctd\u003eHP-HS-C2\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eBearing code\u003c\/th\u003e\n\u003ctd\u003eSR144TiKZN\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eDimensions\u003c\/th\u003e\n\u003ctd\u003e3.175 × 6.35 × 2.38 mm (ID × OD × W)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eRated speed\u003c\/th\u003e\n\u003ctd\u003e\u0026gt; 400,000 RPM\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eMaterial\u003c\/th\u003e\n\u003ctd\u003e440C rings + fabric-reinforced phenolic cage + Si3N4 ceramic balls\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eApplication\u003c\/th\u003e\n\u003ctd\u003eHigh-speed dental handpiece repair\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eNet weight\u003c\/th\u003e\n\u003ctd\u003e10 g\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003ePacked shipping weight\u003c\/th\u003e\n\u003ctd\u003e20 g\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\u003ch2\u003eBefore Ordering\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eMatch the bearing code and all three dimensions with the removed bearing.\u003c\/li\u003e\n\u003cli\u003eConfirm the ball and cage materials required for the repair.\u003c\/li\u003e\n\u003cli\u003eCheck shield, flange, groove and ring-width details where applicable.\u003c\/li\u003e\n\u003cli\u003eInstallation and functional testing should be completed by a qualified repair technician.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cdetails open\u003e\u003csummary\u003e\u003cstrong\u003eEnglish Bearing Code Reference\u003c\/strong\u003e\u003c\/summary\u003e\u003cp\u003eUse this table to read common high-speed handpiece bearing designations. The product-specific specifications above take priority whenever a code is not present or the construction differs.\u003c\/p\u003e\n\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth scope=\"col\"\u003eCode\u003c\/th\u003e\n\u003cth scope=\"col\"\u003eMeaning\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eS\u003c\/th\u003e\n\u003ctd\u003eMaterial-series prefix. Refer to the product-specific Material row above for the actual ring, cage and ball materials.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eF\u003c\/th\u003e\n\u003ctd\u003eThrust flange on the outer ring. With a 2.38 mm outer-ring width, the flange is 0.60 mm wide; with a 2.78 mm outer-ring width, it is 0.80 mm wide. For a grooved outer ring (G), the flange is 0.45 mm wide.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eR144\u003c\/th\u003e\n\u003ctd\u003eR144 is the basic series used in this designation. The listed dimensions for this SKU are 3.175 × 6.35 × 2.38 mm (ID × OD × W).\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eK1 \/ K2\u003c\/th\u003e\n\u003ctd\u003eAngular-contact construction. K1 indicates a separable inner ring; K2 indicates a separable outer ring. Angular-contact versions use a one-piece cage.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eTA \/ TL \/ Ti\u003c\/th\u003e\n\u003ctd\u003eCage material. TA: yellow polyimide; TL: black polyimide (Torlon); Ti: fabric-reinforced phenolic.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eK \/ G\u003c\/th\u003e\n\u003ctd\u003eOuter-ring profile. K indicates a stepped outer diameter; G indicates a grooved outer diameter.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eZ \/ Z1\u003c\/th\u003e\n\u003ctd\u003eShield configuration. Z indicates a one-sided shield; Z1 indicates an integral one-sided shield.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eW \/ W02\u003c\/th\u003e\n\u003ctd\u003eWidth code. W means both rings are 2.78 mm wide. W02 means the outer ring is 2.38 mm and the inner ring is 2.78 mm. With no width code, both rings are 2.38 mm wide.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eN\u003c\/th\u003e\n\u003ctd\u003eBall material. N indicates Si3N4 silicon-nitride ceramic balls. With no N code, the balls are 9Cr18Mo \/ AISI 440C steel.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003c\/details\u003e\u003csection data-seo-geo=\"common-questions\"\u003e\u003ch2\u003eCommon Questions\u003c\/h2\u003e\n\u003ch3\u003eWhat is HP-HS-C2?\u003c\/h3\u003e\n\u003cp\u003eHP-HS-C2 is our internal reference for a SR144TiKZN replacement bearing. Its listed size is 3.175 × 6.35 × 2.38 mm (ID × OD × W), with ceramic balls and a phenolic cage.\u003c\/p\u003e\n\u003ch3\u003eHow do I confirm that this bearing will fit?\u003c\/h3\u003e\n\u003cp\u003eCompare the bearing code and the inner diameter, outer diameter and width with the removed bearing. Then confirm any shield, flange, groove, cage and ball-material requirements. A qualified handpiece repair technician should make the final fitment decision.\u003c\/p\u003e\n\u003ch3\u003eIs this an OEM bearing?\u003c\/h3\u003e\n\u003cp\u003eNo. This is an independent third-party replacement bearing. Brand and model names, when mentioned, are used only to identify compatibility; no manufacturer affiliation or endorsement is claimed.\u003c\/p\u003e\u003c\/section\u003e\u003cnav data-related-links=\"products\" aria-label=\"Related resources\"\u003e\u003ch2\u003eRelated Resources\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"\/collections\/high-speed-handpiece-bearings\"\u003eBrowse all high-speed handpiece bearings\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/blogs\/repair-guides\"\u003eRead dental handpiece repair guides\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\u003c\/nav\u003e\u003cp\u003e\u003cstrong\u003eCompatibility notice:\u003c\/strong\u003e HP-HS-C2 is an internal reseller SKU. This is an independent third-party replacement bearing and is not manufactured, sponsored, authorized or endorsed by the handpiece manufacturer. Final fitment must be verified before installation.\u003c\/p\u003e","brand":"Handpiece Parts Hub","offers":[{"title":"Default Title","offer_id":64436785119601,"sku":"HP-HS-C2","price":4.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1033\/9893\/2849\/files\/HP-HS-C2.png?v=1787191451"},{"product_id":"hp-hs-d1-high-speed-dental-handpiece-bearing","title":"HP-HS-D1 High-Speed Bearing – SR144TLKZWN – 3.175 × 6.35 × 2.78 mm","description":"\u003cp\u003e\u003cstrong\u003eHP-HS-D1\u003c\/strong\u003e is an independent replacement bearing for professional high-speed dental handpiece repair. It is supplied under our internal HP reference so technicians can compare it with the original bearing before ordering.\u003c\/p\u003e\u003csection data-seo-geo=\"quick-answer\"\u003e\u003ch2\u003eQuick Answer\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eHP-HS-D1\u003c\/strong\u003e is a SR144TLKZWN high-speed dental handpiece bearing measuring 3.175 × 6.35 × 2.78 mm (ID × OD × W). It uses 440C rings + Torlon polyimide cage + Si3N4 ceramic balls and is rated above 400,000 RPM. Match the code, all three dimensions and construction details before ordering.\u003c\/p\u003e\u003c\/section\u003e\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eInternal SKU\u003c\/th\u003e\n\u003ctd\u003eHP-HS-D1\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eBearing code\u003c\/th\u003e\n\u003ctd\u003eSR144TLKZWN\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eDimensions\u003c\/th\u003e\n\u003ctd\u003e3.175 × 6.35 × 2.78 mm (ID × OD × W)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eRated speed\u003c\/th\u003e\n\u003ctd\u003e\u0026gt; 400,000 RPM\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eMaterial\u003c\/th\u003e\n\u003ctd\u003e440C rings + Torlon polyimide cage + Si3N4 ceramic balls\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eApplication\u003c\/th\u003e\n\u003ctd\u003eHigh-speed dental handpiece repair\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eNet weight\u003c\/th\u003e\n\u003ctd\u003e10 g\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003ePacked shipping weight\u003c\/th\u003e\n\u003ctd\u003e20 g\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\u003ch2\u003eBefore Ordering\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eMatch the bearing code and all three dimensions with the removed bearing.\u003c\/li\u003e\n\u003cli\u003eConfirm the ball and cage materials required for the repair.\u003c\/li\u003e\n\u003cli\u003eCheck shield, flange, groove and ring-width details where applicable.\u003c\/li\u003e\n\u003cli\u003eInstallation and functional testing should be completed by a qualified repair technician.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cdetails open\u003e\u003csummary\u003e\u003cstrong\u003eEnglish Bearing Code Reference\u003c\/strong\u003e\u003c\/summary\u003e\u003cp\u003eUse this table to read common high-speed handpiece bearing designations. The product-specific specifications above take priority whenever a code is not present or the construction differs.\u003c\/p\u003e\n\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth scope=\"col\"\u003eCode\u003c\/th\u003e\n\u003cth scope=\"col\"\u003eMeaning\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eS\u003c\/th\u003e\n\u003ctd\u003eMaterial-series prefix. Refer to the product-specific Material row above for the actual ring, cage and ball materials.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eF\u003c\/th\u003e\n\u003ctd\u003eThrust flange on the outer ring. With a 2.38 mm outer-ring width, the flange is 0.60 mm wide; with a 2.78 mm outer-ring width, it is 0.80 mm wide. For a grooved outer ring (G), the flange is 0.45 mm wide.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eR144\u003c\/th\u003e\n\u003ctd\u003eR144 is the basic series used in this designation. The listed dimensions for this SKU are 3.175 × 6.35 × 2.78 mm (ID × OD × W).\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eK1 \/ K2\u003c\/th\u003e\n\u003ctd\u003eAngular-contact construction. K1 indicates a separable inner ring; K2 indicates a separable outer ring. Angular-contact versions use a one-piece cage.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eTA \/ TL \/ Ti\u003c\/th\u003e\n\u003ctd\u003eCage material. TA: yellow polyimide; TL: black polyimide (Torlon); Ti: fabric-reinforced phenolic.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eK \/ G\u003c\/th\u003e\n\u003ctd\u003eOuter-ring profile. K indicates a stepped outer diameter; G indicates a grooved outer diameter.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eZ \/ Z1\u003c\/th\u003e\n\u003ctd\u003eShield configuration. Z indicates a one-sided shield; Z1 indicates an integral one-sided shield.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eW \/ W02\u003c\/th\u003e\n\u003ctd\u003eWidth code. W means both rings are 2.78 mm wide. W02 means the outer ring is 2.38 mm and the inner ring is 2.78 mm. With no width code, both rings are 2.38 mm wide.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eN\u003c\/th\u003e\n\u003ctd\u003eBall material. N indicates Si3N4 silicon-nitride ceramic balls. With no N code, the balls are 9Cr18Mo \/ AISI 440C steel.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003c\/details\u003e\u003csection data-seo-geo=\"common-questions\"\u003e\u003ch2\u003eCommon Questions\u003c\/h2\u003e\n\u003ch3\u003eWhat is HP-HS-D1?\u003c\/h3\u003e\n\u003cp\u003eHP-HS-D1 is our internal reference for a SR144TLKZWN replacement bearing. Its listed size is 3.175 × 6.35 × 2.78 mm (ID × OD × W), with ceramic balls and a Torlon cage.\u003c\/p\u003e\n\u003ch3\u003eHow do I confirm that this bearing will fit?\u003c\/h3\u003e\n\u003cp\u003eCompare the bearing code and the inner diameter, outer diameter and width with the removed bearing. Then confirm any shield, flange, groove, cage and ball-material requirements. A qualified handpiece repair technician should make the final fitment decision.\u003c\/p\u003e\n\u003ch3\u003eIs this an OEM bearing?\u003c\/h3\u003e\n\u003cp\u003eNo. This is an independent third-party replacement bearing. Brand and model names, when mentioned, are used only to identify compatibility; no manufacturer affiliation or endorsement is claimed.\u003c\/p\u003e\u003c\/section\u003e\u003cnav data-related-links=\"products\" aria-label=\"Related resources\"\u003e\u003ch2\u003eRelated Resources\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"\/collections\/high-speed-handpiece-bearings\"\u003eBrowse all high-speed handpiece bearings\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/blogs\/repair-guides\"\u003eRead dental handpiece repair guides\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\u003c\/nav\u003e\u003cp\u003e\u003cstrong\u003eCompatibility notice:\u003c\/strong\u003e HP-HS-D1 is an internal reseller SKU. This is an independent third-party replacement bearing and is not manufactured, sponsored, authorized or endorsed by the handpiece manufacturer. Final fitment must be verified before installation.\u003c\/p\u003e","brand":"Handpiece Parts Hub","offers":[{"title":"Default Title","offer_id":64436785152369,"sku":"HP-HS-D1","price":4.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1033\/9893\/2849\/files\/HP-HS-D1.png?v=1787191451"},{"product_id":"hp-hs-d2-high-speed-dental-handpiece-bearing","title":"HP-HS-D2 High-Speed Bearing – SR144TiKZWN – 3.175 × 6.35 × 2.78 mm","description":"\u003cp\u003e\u003cstrong\u003eHP-HS-D2\u003c\/strong\u003e is an independent replacement bearing for professional high-speed dental handpiece repair. It is supplied under our internal HP reference so technicians can compare it with the original bearing before ordering.\u003c\/p\u003e\u003csection data-seo-geo=\"quick-answer\"\u003e\u003ch2\u003eQuick Answer\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eHP-HS-D2\u003c\/strong\u003e is a SR144TiKZWN high-speed dental handpiece bearing measuring 3.175 × 6.35 × 2.78 mm (ID × OD × W). It uses 440C rings + fabric-reinforced phenolic cage + Si3N4 ceramic balls and is rated above 400,000 RPM. Match the code, all three dimensions and construction details before ordering.\u003c\/p\u003e\u003c\/section\u003e\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eInternal SKU\u003c\/th\u003e\n\u003ctd\u003eHP-HS-D2\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eBearing code\u003c\/th\u003e\n\u003ctd\u003eSR144TiKZWN\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eDimensions\u003c\/th\u003e\n\u003ctd\u003e3.175 × 6.35 × 2.78 mm (ID × OD × W)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eRated speed\u003c\/th\u003e\n\u003ctd\u003e\u0026gt; 400,000 RPM\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eMaterial\u003c\/th\u003e\n\u003ctd\u003e440C rings + fabric-reinforced phenolic cage + Si3N4 ceramic balls\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eApplication\u003c\/th\u003e\n\u003ctd\u003eHigh-speed dental handpiece repair\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eNet weight\u003c\/th\u003e\n\u003ctd\u003e10 g\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003ePacked shipping weight\u003c\/th\u003e\n\u003ctd\u003e20 g\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\u003ch2\u003eBefore Ordering\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eMatch the bearing code and all three dimensions with the removed bearing.\u003c\/li\u003e\n\u003cli\u003eConfirm the ball and cage materials required for the repair.\u003c\/li\u003e\n\u003cli\u003eCheck shield, flange, groove and ring-width details where applicable.\u003c\/li\u003e\n\u003cli\u003eInstallation and functional testing should be completed by a qualified repair technician.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cdetails open\u003e\u003csummary\u003e\u003cstrong\u003eEnglish Bearing Code Reference\u003c\/strong\u003e\u003c\/summary\u003e\u003cp\u003eUse this table to read common high-speed handpiece bearing designations. The product-specific specifications above take priority whenever a code is not present or the construction differs.\u003c\/p\u003e\n\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth scope=\"col\"\u003eCode\u003c\/th\u003e\n\u003cth scope=\"col\"\u003eMeaning\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eS\u003c\/th\u003e\n\u003ctd\u003eMaterial-series prefix. Refer to the product-specific Material row above for the actual ring, cage and ball materials.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eF\u003c\/th\u003e\n\u003ctd\u003eThrust flange on the outer ring. With a 2.38 mm outer-ring width, the flange is 0.60 mm wide; with a 2.78 mm outer-ring width, it is 0.80 mm wide. For a grooved outer ring (G), the flange is 0.45 mm wide.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eR144\u003c\/th\u003e\n\u003ctd\u003eR144 is the basic series used in this designation. The listed dimensions for this SKU are 3.175 × 6.35 × 2.78 mm (ID × OD × W).\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eK1 \/ K2\u003c\/th\u003e\n\u003ctd\u003eAngular-contact construction. K1 indicates a separable inner ring; K2 indicates a separable outer ring. Angular-contact versions use a one-piece cage.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eTA \/ TL \/ Ti\u003c\/th\u003e\n\u003ctd\u003eCage material. TA: yellow polyimide; TL: black polyimide (Torlon); Ti: fabric-reinforced phenolic.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eK \/ G\u003c\/th\u003e\n\u003ctd\u003eOuter-ring profile. K indicates a stepped outer diameter; G indicates a grooved outer diameter.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eZ \/ Z1\u003c\/th\u003e\n\u003ctd\u003eShield configuration. Z indicates a one-sided shield; Z1 indicates an integral one-sided shield.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eW \/ W02\u003c\/th\u003e\n\u003ctd\u003eWidth code. W means both rings are 2.78 mm wide. W02 means the outer ring is 2.38 mm and the inner ring is 2.78 mm. With no width code, both rings are 2.38 mm wide.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eN\u003c\/th\u003e\n\u003ctd\u003eBall material. N indicates Si3N4 silicon-nitride ceramic balls. With no N code, the balls are 9Cr18Mo \/ AISI 440C steel.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003c\/details\u003e\u003csection data-seo-geo=\"common-questions\"\u003e\u003ch2\u003eCommon Questions\u003c\/h2\u003e\n\u003ch3\u003eWhat is HP-HS-D2?\u003c\/h3\u003e\n\u003cp\u003eHP-HS-D2 is our internal reference for a SR144TiKZWN replacement bearing. Its listed size is 3.175 × 6.35 × 2.78 mm (ID × OD × W), with ceramic balls and a phenolic cage.\u003c\/p\u003e\n\u003ch3\u003eHow do I confirm that this bearing will fit?\u003c\/h3\u003e\n\u003cp\u003eCompare the bearing code and the inner diameter, outer diameter and width with the removed bearing. Then confirm any shield, flange, groove, cage and ball-material requirements. A qualified handpiece repair technician should make the final fitment decision.\u003c\/p\u003e\n\u003ch3\u003eIs this an OEM bearing?\u003c\/h3\u003e\n\u003cp\u003eNo. This is an independent third-party replacement bearing. Brand and model names, when mentioned, are used only to identify compatibility; no manufacturer affiliation or endorsement is claimed.\u003c\/p\u003e\u003c\/section\u003e\u003cnav data-related-links=\"products\" aria-label=\"Related resources\"\u003e\u003ch2\u003eRelated Resources\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"\/collections\/high-speed-handpiece-bearings\"\u003eBrowse all high-speed handpiece bearings\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/blogs\/repair-guides\"\u003eRead dental handpiece repair guides\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\u003c\/nav\u003e\u003cp\u003e\u003cstrong\u003eCompatibility notice:\u003c\/strong\u003e HP-HS-D2 is an internal reseller SKU. This is an independent third-party replacement bearing and is not manufactured, sponsored, authorized or endorsed by the handpiece manufacturer. Final fitment must be verified before installation.\u003c\/p\u003e","brand":"Handpiece Parts Hub","offers":[{"title":"Default Title","offer_id":64436785185137,"sku":"HP-HS-D2","price":4.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1033\/9893\/2849\/files\/HP-HS-D2.png?v=1787191451"},{"product_id":"hp-hs-e1-high-speed-dental-handpiece-bearing","title":"HP-HS-E1 High-Speed Bearing – SFR144TLZN – 3.175 × 7.5 × 2.38 mm","description":"\u003cp\u003e\u003cstrong\u003eHP-HS-E1\u003c\/strong\u003e is an independent replacement bearing for professional high-speed dental handpiece repair. It is supplied under our internal HP reference so technicians can compare it with the original bearing before ordering.\u003c\/p\u003e\u003csection data-seo-geo=\"quick-answer\"\u003e\u003ch2\u003eQuick Answer\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eHP-HS-E1\u003c\/strong\u003e is a SFR144TLZN high-speed dental handpiece bearing measuring 3.175 × 7.5 × 2.38 mm (ID × OD × W). It uses 440C rings + Torlon polyimide cage + Si3N4 ceramic balls and is rated above 400,000 RPM. Match the code, all three dimensions and construction details before ordering.\u003c\/p\u003e\u003c\/section\u003e\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eInternal SKU\u003c\/th\u003e\n\u003ctd\u003eHP-HS-E1\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eBearing code\u003c\/th\u003e\n\u003ctd\u003eSFR144TLZN\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eDimensions\u003c\/th\u003e\n\u003ctd\u003e3.175 × 7.5 × 2.38 mm (ID × OD × W)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eRated speed\u003c\/th\u003e\n\u003ctd\u003e\u0026gt; 400,000 RPM\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eMaterial\u003c\/th\u003e\n\u003ctd\u003e440C rings + Torlon polyimide cage + Si3N4 ceramic balls\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eApplication\u003c\/th\u003e\n\u003ctd\u003eHigh-speed dental handpiece repair\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eNet weight\u003c\/th\u003e\n\u003ctd\u003e10 g\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003ePacked shipping weight\u003c\/th\u003e\n\u003ctd\u003e20 g\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\u003ch2\u003eBefore Ordering\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eMatch the bearing code and all three dimensions with the removed bearing.\u003c\/li\u003e\n\u003cli\u003eConfirm the ball and cage materials required for the repair.\u003c\/li\u003e\n\u003cli\u003eCheck shield, flange, groove and ring-width details where applicable.\u003c\/li\u003e\n\u003cli\u003eInstallation and functional testing should be completed by a qualified repair technician.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cdetails open\u003e\u003csummary\u003e\u003cstrong\u003eEnglish Bearing Code Reference\u003c\/strong\u003e\u003c\/summary\u003e\u003cp\u003eUse this table to read common high-speed handpiece bearing designations. The product-specific specifications above take priority whenever a code is not present or the construction differs.\u003c\/p\u003e\n\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth scope=\"col\"\u003eCode\u003c\/th\u003e\n\u003cth scope=\"col\"\u003eMeaning\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eS\u003c\/th\u003e\n\u003ctd\u003eMaterial-series prefix. Refer to the product-specific Material row above for the actual ring, cage and ball materials.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eF\u003c\/th\u003e\n\u003ctd\u003eThrust flange on the outer ring. With a 2.38 mm outer-ring width, the flange is 0.60 mm wide; with a 2.78 mm outer-ring width, it is 0.80 mm wide. For a grooved outer ring (G), the flange is 0.45 mm wide.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eR144\u003c\/th\u003e\n\u003ctd\u003eR144 is the basic series used in this designation. The listed dimensions for this SKU are 3.175 × 7.5 × 2.38 mm (ID × OD × W).\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eK1 \/ K2\u003c\/th\u003e\n\u003ctd\u003eAngular-contact construction. K1 indicates a separable inner ring; K2 indicates a separable outer ring. Angular-contact versions use a one-piece cage.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eTA \/ TL \/ Ti\u003c\/th\u003e\n\u003ctd\u003eCage material. TA: yellow polyimide; TL: black polyimide (Torlon); Ti: fabric-reinforced phenolic.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eK \/ G\u003c\/th\u003e\n\u003ctd\u003eOuter-ring profile. K indicates a stepped outer diameter; G indicates a grooved outer diameter.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eZ \/ Z1\u003c\/th\u003e\n\u003ctd\u003eShield configuration. Z indicates a one-sided shield; Z1 indicates an integral one-sided shield.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eW \/ W02\u003c\/th\u003e\n\u003ctd\u003eWidth code. W means both rings are 2.78 mm wide. W02 means the outer ring is 2.38 mm and the inner ring is 2.78 mm. With no width code, both rings are 2.38 mm wide.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eN\u003c\/th\u003e\n\u003ctd\u003eBall material. N indicates Si3N4 silicon-nitride ceramic balls. With no N code, the balls are 9Cr18Mo \/ AISI 440C steel.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003c\/details\u003e\u003csection data-seo-geo=\"common-questions\"\u003e\u003ch2\u003eCommon Questions\u003c\/h2\u003e\n\u003ch3\u003eWhat is HP-HS-E1?\u003c\/h3\u003e\n\u003cp\u003eHP-HS-E1 is our internal reference for a SFR144TLZN replacement bearing. Its listed size is 3.175 × 7.5 × 2.38 mm (ID × OD × W), with ceramic balls and a Torlon cage.\u003c\/p\u003e\n\u003ch3\u003eHow do I confirm that this bearing will fit?\u003c\/h3\u003e\n\u003cp\u003eCompare the bearing code and the inner diameter, outer diameter and width with the removed bearing. Then confirm any shield, flange, groove, cage and ball-material requirements. A qualified handpiece repair technician should make the final fitment decision.\u003c\/p\u003e\n\u003ch3\u003eIs this an OEM bearing?\u003c\/h3\u003e\n\u003cp\u003eNo. This is an independent third-party replacement bearing. Brand and model names, when mentioned, are used only to identify compatibility; no manufacturer affiliation or endorsement is claimed.\u003c\/p\u003e\u003c\/section\u003e\u003cnav data-related-links=\"products\" aria-label=\"Related resources\"\u003e\u003ch2\u003eRelated Resources\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"\/collections\/high-speed-handpiece-bearings\"\u003eBrowse all high-speed handpiece bearings\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/blogs\/repair-guides\"\u003eRead dental handpiece repair guides\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\u003c\/nav\u003e\u003cp\u003e\u003cstrong\u003eCompatibility notice:\u003c\/strong\u003e HP-HS-E1 is an internal reseller SKU. This is an independent third-party replacement bearing and is not manufactured, sponsored, authorized or endorsed by the handpiece manufacturer. Final fitment must be verified before installation.\u003c\/p\u003e","brand":"Handpiece Parts Hub","offers":[{"title":"Default Title","offer_id":64436785217905,"sku":"HP-HS-E1","price":4.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1033\/9893\/2849\/files\/HP-HS-E1.png?v=1787191451"},{"product_id":"hp-hs-e2-high-speed-dental-handpiece-bearing","title":"HP-HS-E2 High-Speed Bearing – SFR144TiZN – 3.175 × 7.5 × 2.38 mm","description":"\u003cp\u003e\u003cstrong\u003eHP-HS-E2\u003c\/strong\u003e is an independent replacement bearing for professional high-speed dental handpiece repair. It is supplied under our internal HP reference so technicians can compare it with the original bearing before ordering.\u003c\/p\u003e\u003csection data-seo-geo=\"quick-answer\"\u003e\u003ch2\u003eQuick Answer\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eHP-HS-E2\u003c\/strong\u003e is a SFR144TiZN high-speed dental handpiece bearing measuring 3.175 × 7.5 × 2.38 mm (ID × OD × W). It uses 440C rings + fabric-reinforced phenolic cage + Si3N4 ceramic balls and is rated above 400,000 RPM. Match the code, all three dimensions and construction details before ordering.\u003c\/p\u003e\u003c\/section\u003e\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eInternal SKU\u003c\/th\u003e\n\u003ctd\u003eHP-HS-E2\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eBearing code\u003c\/th\u003e\n\u003ctd\u003eSFR144TiZN\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eDimensions\u003c\/th\u003e\n\u003ctd\u003e3.175 × 7.5 × 2.38 mm (ID × OD × W)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eRated speed\u003c\/th\u003e\n\u003ctd\u003e\u0026gt; 400,000 RPM\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eMaterial\u003c\/th\u003e\n\u003ctd\u003e440C rings + fabric-reinforced phenolic cage + Si3N4 ceramic balls\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eApplication\u003c\/th\u003e\n\u003ctd\u003eHigh-speed dental handpiece repair\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eNet weight\u003c\/th\u003e\n\u003ctd\u003e10 g\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003ePacked shipping weight\u003c\/th\u003e\n\u003ctd\u003e20 g\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\u003ch2\u003eBefore Ordering\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eMatch the bearing code and all three dimensions with the removed bearing.\u003c\/li\u003e\n\u003cli\u003eConfirm the ball and cage materials required for the repair.\u003c\/li\u003e\n\u003cli\u003eCheck shield, flange, groove and ring-width details where applicable.\u003c\/li\u003e\n\u003cli\u003eInstallation and functional testing should be completed by a qualified repair technician.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cdetails open\u003e\u003csummary\u003e\u003cstrong\u003eEnglish Bearing Code Reference\u003c\/strong\u003e\u003c\/summary\u003e\u003cp\u003eUse this table to read common high-speed handpiece bearing designations. The product-specific specifications above take priority whenever a code is not present or the construction differs.\u003c\/p\u003e\n\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth scope=\"col\"\u003eCode\u003c\/th\u003e\n\u003cth scope=\"col\"\u003eMeaning\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eS\u003c\/th\u003e\n\u003ctd\u003eMaterial-series prefix. Refer to the product-specific Material row above for the actual ring, cage and ball materials.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eF\u003c\/th\u003e\n\u003ctd\u003eThrust flange on the outer ring. With a 2.38 mm outer-ring width, the flange is 0.60 mm wide; with a 2.78 mm outer-ring width, it is 0.80 mm wide. For a grooved outer ring (G), the flange is 0.45 mm wide.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eR144\u003c\/th\u003e\n\u003ctd\u003eR144 is the basic series used in this designation. The listed dimensions for this SKU are 3.175 × 7.5 × 2.38 mm (ID × OD × W).\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eK1 \/ K2\u003c\/th\u003e\n\u003ctd\u003eAngular-contact construction. K1 indicates a separable inner ring; K2 indicates a separable outer ring. Angular-contact versions use a one-piece cage.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eTA \/ TL \/ Ti\u003c\/th\u003e\n\u003ctd\u003eCage material. TA: yellow polyimide; TL: black polyimide (Torlon); Ti: fabric-reinforced phenolic.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eK \/ G\u003c\/th\u003e\n\u003ctd\u003eOuter-ring profile. K indicates a stepped outer diameter; G indicates a grooved outer diameter.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eZ \/ Z1\u003c\/th\u003e\n\u003ctd\u003eShield configuration. Z indicates a one-sided shield; Z1 indicates an integral one-sided shield.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eW \/ W02\u003c\/th\u003e\n\u003ctd\u003eWidth code. W means both rings are 2.78 mm wide. W02 means the outer ring is 2.38 mm and the inner ring is 2.78 mm. With no width code, both rings are 2.38 mm wide.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eN\u003c\/th\u003e\n\u003ctd\u003eBall material. N indicates Si3N4 silicon-nitride ceramic balls. With no N code, the balls are 9Cr18Mo \/ AISI 440C steel.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003c\/details\u003e\u003csection data-seo-geo=\"common-questions\"\u003e\u003ch2\u003eCommon Questions\u003c\/h2\u003e\n\u003ch3\u003eWhat is HP-HS-E2?\u003c\/h3\u003e\n\u003cp\u003eHP-HS-E2 is our internal reference for a SFR144TiZN replacement bearing. Its listed size is 3.175 × 7.5 × 2.38 mm (ID × OD × W), with ceramic balls and a phenolic cage.\u003c\/p\u003e\n\u003ch3\u003eHow do I confirm that this bearing will fit?\u003c\/h3\u003e\n\u003cp\u003eCompare the bearing code and the inner diameter, outer diameter and width with the removed bearing. Then confirm any shield, flange, groove, cage and ball-material requirements. A qualified handpiece repair technician should make the final fitment decision.\u003c\/p\u003e\n\u003ch3\u003eIs this an OEM bearing?\u003c\/h3\u003e\n\u003cp\u003eNo. This is an independent third-party replacement bearing. Brand and model names, when mentioned, are used only to identify compatibility; no manufacturer affiliation or endorsement is claimed.\u003c\/p\u003e\u003c\/section\u003e\u003cnav data-related-links=\"products\" aria-label=\"Related resources\"\u003e\u003ch2\u003eRelated Resources\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"\/collections\/high-speed-handpiece-bearings\"\u003eBrowse all high-speed handpiece bearings\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/blogs\/repair-guides\"\u003eRead dental handpiece repair guides\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\u003c\/nav\u003e\u003cp\u003e\u003cstrong\u003eCompatibility notice:\u003c\/strong\u003e HP-HS-E2 is an internal reseller SKU. This is an independent third-party replacement bearing and is not manufactured, sponsored, authorized or endorsed by the handpiece manufacturer. Final fitment must be verified before installation.\u003c\/p\u003e","brand":"Handpiece Parts Hub","offers":[{"title":"Default Title","offer_id":64436785250673,"sku":"HP-HS-E2","price":4.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1033\/9893\/2849\/files\/HP-HS-E2.png?v=1787191451"},{"product_id":"hp-hs-f1-high-speed-dental-handpiece-bearing","title":"HP-HS-F1 High-Speed Bearing – SFR144TLZWN – 3.175 × 7.5 × 2.78 mm","description":"\u003cp\u003e\u003cstrong\u003eHP-HS-F1\u003c\/strong\u003e is an independent replacement bearing for professional high-speed dental handpiece repair. It is supplied under our internal HP reference so technicians can compare it with the original bearing before ordering.\u003c\/p\u003e\u003csection data-seo-geo=\"quick-answer\"\u003e\u003ch2\u003eQuick Answer\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eHP-HS-F1\u003c\/strong\u003e is a SFR144TLZWN high-speed dental handpiece bearing measuring 3.175 × 7.5 × 2.78 mm (ID × OD × W). It uses 440C rings + Torlon polyimide cage + Si3N4 ceramic balls and is rated above 400,000 RPM. Match the code, all three dimensions and construction details before ordering.\u003c\/p\u003e\u003c\/section\u003e\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eInternal SKU\u003c\/th\u003e\n\u003ctd\u003eHP-HS-F1\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eBearing code\u003c\/th\u003e\n\u003ctd\u003eSFR144TLZWN\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eDimensions\u003c\/th\u003e\n\u003ctd\u003e3.175 × 7.5 × 2.78 mm (ID × OD × W)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eRated speed\u003c\/th\u003e\n\u003ctd\u003e\u0026gt; 400,000 RPM\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eMaterial\u003c\/th\u003e\n\u003ctd\u003e440C rings + Torlon polyimide cage + Si3N4 ceramic balls\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eApplication\u003c\/th\u003e\n\u003ctd\u003eHigh-speed dental handpiece repair\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eNet weight\u003c\/th\u003e\n\u003ctd\u003e10 g\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003ePacked shipping weight\u003c\/th\u003e\n\u003ctd\u003e20 g\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\u003ch2\u003eBefore Ordering\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eMatch the bearing code and all three dimensions with the removed bearing.\u003c\/li\u003e\n\u003cli\u003eConfirm the ball and cage materials required for the repair.\u003c\/li\u003e\n\u003cli\u003eCheck shield, flange, groove and ring-width details where applicable.\u003c\/li\u003e\n\u003cli\u003eInstallation and functional testing should be completed by a qualified repair technician.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cdetails open\u003e\u003csummary\u003e\u003cstrong\u003eEnglish Bearing Code Reference\u003c\/strong\u003e\u003c\/summary\u003e\u003cp\u003eUse this table to read common high-speed handpiece bearing designations. The product-specific specifications above take priority whenever a code is not present or the construction differs.\u003c\/p\u003e\n\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth scope=\"col\"\u003eCode\u003c\/th\u003e\n\u003cth scope=\"col\"\u003eMeaning\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eS\u003c\/th\u003e\n\u003ctd\u003eMaterial-series prefix. Refer to the product-specific Material row above for the actual ring, cage and ball materials.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eF\u003c\/th\u003e\n\u003ctd\u003eThrust flange on the outer ring. With a 2.38 mm outer-ring width, the flange is 0.60 mm wide; with a 2.78 mm outer-ring width, it is 0.80 mm wide. For a grooved outer ring (G), the flange is 0.45 mm wide.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eR144\u003c\/th\u003e\n\u003ctd\u003eR144 is the basic series used in this designation. The listed dimensions for this SKU are 3.175 × 7.5 × 2.78 mm (ID × OD × W).\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eK1 \/ K2\u003c\/th\u003e\n\u003ctd\u003eAngular-contact construction. K1 indicates a separable inner ring; K2 indicates a separable outer ring. Angular-contact versions use a one-piece cage.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eTA \/ TL \/ Ti\u003c\/th\u003e\n\u003ctd\u003eCage material. TA: yellow polyimide; TL: black polyimide (Torlon); Ti: fabric-reinforced phenolic.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eK \/ G\u003c\/th\u003e\n\u003ctd\u003eOuter-ring profile. K indicates a stepped outer diameter; G indicates a grooved outer diameter.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eZ \/ Z1\u003c\/th\u003e\n\u003ctd\u003eShield configuration. Z indicates a one-sided shield; Z1 indicates an integral one-sided shield.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eW \/ W02\u003c\/th\u003e\n\u003ctd\u003eWidth code. W means both rings are 2.78 mm wide. W02 means the outer ring is 2.38 mm and the inner ring is 2.78 mm. With no width code, both rings are 2.38 mm wide.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eN\u003c\/th\u003e\n\u003ctd\u003eBall material. N indicates Si3N4 silicon-nitride ceramic balls. With no N code, the balls are 9Cr18Mo \/ AISI 440C steel.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003c\/details\u003e\u003csection data-seo-geo=\"common-questions\"\u003e\u003ch2\u003eCommon Questions\u003c\/h2\u003e\n\u003ch3\u003eWhat is HP-HS-F1?\u003c\/h3\u003e\n\u003cp\u003eHP-HS-F1 is our internal reference for a SFR144TLZWN replacement bearing. Its listed size is 3.175 × 7.5 × 2.78 mm (ID × OD × W), with ceramic balls and a Torlon cage.\u003c\/p\u003e\n\u003ch3\u003eHow do I confirm that this bearing will fit?\u003c\/h3\u003e\n\u003cp\u003eCompare the bearing code and the inner diameter, outer diameter and width with the removed bearing. Then confirm any shield, flange, groove, cage and ball-material requirements. A qualified handpiece repair technician should make the final fitment decision.\u003c\/p\u003e\n\u003ch3\u003eIs this an OEM bearing?\u003c\/h3\u003e\n\u003cp\u003eNo. This is an independent third-party replacement bearing. Brand and model names, when mentioned, are used only to identify compatibility; no manufacturer affiliation or endorsement is claimed.\u003c\/p\u003e\u003c\/section\u003e\u003cnav data-related-links=\"products\" aria-label=\"Related resources\"\u003e\u003ch2\u003eRelated Resources\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"\/collections\/high-speed-handpiece-bearings\"\u003eBrowse all high-speed handpiece bearings\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/blogs\/repair-guides\"\u003eRead dental handpiece repair guides\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\u003c\/nav\u003e\u003cp\u003e\u003cstrong\u003eCompatibility notice:\u003c\/strong\u003e HP-HS-F1 is an internal reseller SKU. This is an independent third-party replacement bearing and is not manufactured, sponsored, authorized or endorsed by the handpiece manufacturer. Final fitment must be verified before installation.\u003c\/p\u003e","brand":"Handpiece Parts Hub","offers":[{"title":"Default Title","offer_id":64436785283441,"sku":"HP-HS-F1","price":4.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1033\/9893\/2849\/files\/HP-HS-F1.png?v=1787191451"},{"product_id":"hp-hs-f2-high-speed-dental-handpiece-bearing","title":"HP-HS-F2 High-Speed Bearing – SFR144TiZWN – 3.175 × 7.5 × 2.78 mm","description":"\u003cp\u003e\u003cstrong\u003eHP-HS-F2\u003c\/strong\u003e is an independent replacement bearing for professional high-speed dental handpiece repair. It is supplied under our internal HP reference so technicians can compare it with the original bearing before ordering.\u003c\/p\u003e\u003csection data-seo-geo=\"quick-answer\"\u003e\u003ch2\u003eQuick Answer\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eHP-HS-F2\u003c\/strong\u003e is a SFR144TiZWN high-speed dental handpiece bearing measuring 3.175 × 7.5 × 2.78 mm (ID × OD × W). It uses 440C rings + fabric-reinforced phenolic cage + Si3N4 ceramic balls and is rated above 400,000 RPM. Match the code, all three dimensions and construction details before ordering.\u003c\/p\u003e\u003c\/section\u003e\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eInternal SKU\u003c\/th\u003e\n\u003ctd\u003eHP-HS-F2\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eBearing code\u003c\/th\u003e\n\u003ctd\u003eSFR144TiZWN\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eDimensions\u003c\/th\u003e\n\u003ctd\u003e3.175 × 7.5 × 2.78 mm (ID × OD × W)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eRated speed\u003c\/th\u003e\n\u003ctd\u003e\u0026gt; 400,000 RPM\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eMaterial\u003c\/th\u003e\n\u003ctd\u003e440C rings + fabric-reinforced phenolic cage + Si3N4 ceramic balls\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eApplication\u003c\/th\u003e\n\u003ctd\u003eHigh-speed dental handpiece repair\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eNet weight\u003c\/th\u003e\n\u003ctd\u003e10 g\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003ePacked shipping weight\u003c\/th\u003e\n\u003ctd\u003e20 g\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\u003ch2\u003eBefore Ordering\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eMatch the bearing code and all three dimensions with the removed bearing.\u003c\/li\u003e\n\u003cli\u003eConfirm the ball and cage materials required for the repair.\u003c\/li\u003e\n\u003cli\u003eCheck shield, flange, groove and ring-width details where applicable.\u003c\/li\u003e\n\u003cli\u003eInstallation and functional testing should be completed by a qualified repair technician.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cdetails open\u003e\u003csummary\u003e\u003cstrong\u003eEnglish Bearing Code Reference\u003c\/strong\u003e\u003c\/summary\u003e\u003cp\u003eUse this table to read common high-speed handpiece bearing designations. The product-specific specifications above take priority whenever a code is not present or the construction differs.\u003c\/p\u003e\n\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth scope=\"col\"\u003eCode\u003c\/th\u003e\n\u003cth scope=\"col\"\u003eMeaning\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eS\u003c\/th\u003e\n\u003ctd\u003eMaterial-series prefix. Refer to the product-specific Material row above for the actual ring, cage and ball materials.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eF\u003c\/th\u003e\n\u003ctd\u003eThrust flange on the outer ring. With a 2.38 mm outer-ring width, the flange is 0.60 mm wide; with a 2.78 mm outer-ring width, it is 0.80 mm wide. For a grooved outer ring (G), the flange is 0.45 mm wide.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eR144\u003c\/th\u003e\n\u003ctd\u003eR144 is the basic series used in this designation. The listed dimensions for this SKU are 3.175 × 7.5 × 2.78 mm (ID × OD × W).\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eK1 \/ K2\u003c\/th\u003e\n\u003ctd\u003eAngular-contact construction. K1 indicates a separable inner ring; K2 indicates a separable outer ring. Angular-contact versions use a one-piece cage.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eTA \/ TL \/ Ti\u003c\/th\u003e\n\u003ctd\u003eCage material. TA: yellow polyimide; TL: black polyimide (Torlon); Ti: fabric-reinforced phenolic.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eK \/ G\u003c\/th\u003e\n\u003ctd\u003eOuter-ring profile. K indicates a stepped outer diameter; G indicates a grooved outer diameter.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eZ \/ Z1\u003c\/th\u003e\n\u003ctd\u003eShield configuration. Z indicates a one-sided shield; Z1 indicates an integral one-sided shield.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eW \/ W02\u003c\/th\u003e\n\u003ctd\u003eWidth code. W means both rings are 2.78 mm wide. W02 means the outer ring is 2.38 mm and the inner ring is 2.78 mm. With no width code, both rings are 2.38 mm wide.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eN\u003c\/th\u003e\n\u003ctd\u003eBall material. N indicates Si3N4 silicon-nitride ceramic balls. With no N code, the balls are 9Cr18Mo \/ AISI 440C steel.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003c\/details\u003e\u003csection data-seo-geo=\"common-questions\"\u003e\u003ch2\u003eCommon Questions\u003c\/h2\u003e\n\u003ch3\u003eWhat is HP-HS-F2?\u003c\/h3\u003e\n\u003cp\u003eHP-HS-F2 is our internal reference for a SFR144TiZWN replacement bearing. Its listed size is 3.175 × 7.5 × 2.78 mm (ID × OD × W), with ceramic balls and a phenolic cage.\u003c\/p\u003e\n\u003ch3\u003eHow do I confirm that this bearing will fit?\u003c\/h3\u003e\n\u003cp\u003eCompare the bearing code and the inner diameter, outer diameter and width with the removed bearing. Then confirm any shield, flange, groove, cage and ball-material requirements. A qualified handpiece repair technician should make the final fitment decision.\u003c\/p\u003e\n\u003ch3\u003eIs this an OEM bearing?\u003c\/h3\u003e\n\u003cp\u003eNo. This is an independent third-party replacement bearing. Brand and model names, when mentioned, are used only to identify compatibility; no manufacturer affiliation or endorsement is claimed.\u003c\/p\u003e\u003c\/section\u003e\u003cnav data-related-links=\"products\" aria-label=\"Related resources\"\u003e\u003ch2\u003eRelated Resources\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"\/collections\/high-speed-handpiece-bearings\"\u003eBrowse all high-speed handpiece bearings\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/blogs\/repair-guides\"\u003eRead dental handpiece repair guides\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\u003c\/nav\u003e\u003cp\u003e\u003cstrong\u003eCompatibility notice:\u003c\/strong\u003e HP-HS-F2 is an internal reseller SKU. This is an independent third-party replacement bearing and is not manufactured, sponsored, authorized or endorsed by the handpiece manufacturer. Final fitment must be verified before installation.\u003c\/p\u003e","brand":"Handpiece Parts Hub","offers":[{"title":"Default Title","offer_id":64436785316209,"sku":"HP-HS-F2","price":4.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1033\/9893\/2849\/files\/HP-HS-F2.png?v=1787191451"},{"product_id":"hp-hs-f3-high-speed-dental-handpiece-bearing","title":"HP-HS-F3 High-Speed Bearing – SFR144K1TiZWN – 3.175 × 7.5 × 2.78 mm","description":"\u003cp\u003e\u003cstrong\u003eHP-HS-F3\u003c\/strong\u003e is an independent replacement bearing for professional high-speed dental handpiece repair. It is supplied under our internal HP reference so technicians can compare it with the original bearing before ordering.\u003c\/p\u003e\u003csection data-seo-geo=\"quick-answer\"\u003e\u003ch2\u003eQuick Answer\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eHP-HS-F3\u003c\/strong\u003e is a SFR144K1TiZWN high-speed dental handpiece bearing measuring 3.175 × 7.5 × 2.78 mm (ID × OD × W). It uses 440C rings + fabric-reinforced phenolic cage + Si3N4 ceramic balls and is rated above 400,000 RPM. Match the code, all three dimensions and construction details before ordering.\u003c\/p\u003e\u003c\/section\u003e\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eInternal SKU\u003c\/th\u003e\n\u003ctd\u003eHP-HS-F3\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eBearing code\u003c\/th\u003e\n\u003ctd\u003eSFR144K1TiZWN\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eDimensions\u003c\/th\u003e\n\u003ctd\u003e3.175 × 7.5 × 2.78 mm (ID × OD × W)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eRated speed\u003c\/th\u003e\n\u003ctd\u003e\u0026gt; 400,000 RPM\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eMaterial\u003c\/th\u003e\n\u003ctd\u003e440C rings + fabric-reinforced phenolic cage + Si3N4 ceramic balls\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eApplication\u003c\/th\u003e\n\u003ctd\u003eHigh-speed dental handpiece repair\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eNet weight\u003c\/th\u003e\n\u003ctd\u003e10 g\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003ePacked shipping weight\u003c\/th\u003e\n\u003ctd\u003e20 g\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\u003ch2\u003eBefore Ordering\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eMatch the bearing code and all three dimensions with the removed bearing.\u003c\/li\u003e\n\u003cli\u003eConfirm the ball and cage materials required for the repair.\u003c\/li\u003e\n\u003cli\u003eCheck shield, flange, groove and ring-width details where applicable.\u003c\/li\u003e\n\u003cli\u003eInstallation and functional testing should be completed by a qualified repair technician.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cdetails open\u003e\u003csummary\u003e\u003cstrong\u003eEnglish Bearing Code Reference\u003c\/strong\u003e\u003c\/summary\u003e\u003cp\u003eUse this table to read common high-speed handpiece bearing designations. The product-specific specifications above take priority whenever a code is not present or the construction differs.\u003c\/p\u003e\n\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth scope=\"col\"\u003eCode\u003c\/th\u003e\n\u003cth scope=\"col\"\u003eMeaning\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eS\u003c\/th\u003e\n\u003ctd\u003eMaterial-series prefix. Refer to the product-specific Material row above for the actual ring, cage and ball materials.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eF\u003c\/th\u003e\n\u003ctd\u003eThrust flange on the outer ring. With a 2.38 mm outer-ring width, the flange is 0.60 mm wide; with a 2.78 mm outer-ring width, it is 0.80 mm wide. For a grooved outer ring (G), the flange is 0.45 mm wide.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eR144\u003c\/th\u003e\n\u003ctd\u003eR144 is the basic series used in this designation. The listed dimensions for this SKU are 3.175 × 7.5 × 2.78 mm (ID × OD × W).\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eK1 \/ K2\u003c\/th\u003e\n\u003ctd\u003eAngular-contact construction. K1 indicates a separable inner ring; K2 indicates a separable outer ring. Angular-contact versions use a one-piece cage.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eTA \/ TL \/ Ti\u003c\/th\u003e\n\u003ctd\u003eCage material. TA: yellow polyimide; TL: black polyimide (Torlon); Ti: fabric-reinforced phenolic.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eK \/ G\u003c\/th\u003e\n\u003ctd\u003eOuter-ring profile. K indicates a stepped outer diameter; G indicates a grooved outer diameter.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eZ \/ Z1\u003c\/th\u003e\n\u003ctd\u003eShield configuration. Z indicates a one-sided shield; Z1 indicates an integral one-sided shield.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eW \/ W02\u003c\/th\u003e\n\u003ctd\u003eWidth code. W means both rings are 2.78 mm wide. W02 means the outer ring is 2.38 mm and the inner ring is 2.78 mm. With no width code, both rings are 2.38 mm wide.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eN\u003c\/th\u003e\n\u003ctd\u003eBall material. N indicates Si3N4 silicon-nitride ceramic balls. With no N code, the balls are 9Cr18Mo \/ AISI 440C steel.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003c\/details\u003e\u003csection data-seo-geo=\"common-questions\"\u003e\u003ch2\u003eCommon Questions\u003c\/h2\u003e\n\u003ch3\u003eWhat is HP-HS-F3?\u003c\/h3\u003e\n\u003cp\u003eHP-HS-F3 is our internal reference for a SFR144K1TiZWN replacement bearing. Its listed size is 3.175 × 7.5 × 2.78 mm (ID × OD × W), with ceramic balls and a phenolic cage.\u003c\/p\u003e\n\u003ch3\u003eHow do I confirm that this bearing will fit?\u003c\/h3\u003e\n\u003cp\u003eCompare the bearing code and the inner diameter, outer diameter and width with the removed bearing. Then confirm any shield, flange, groove, cage and ball-material requirements. A qualified handpiece repair technician should make the final fitment decision.\u003c\/p\u003e\n\u003ch3\u003eIs this an OEM bearing?\u003c\/h3\u003e\n\u003cp\u003eNo. This is an independent third-party replacement bearing. Brand and model names, when mentioned, are used only to identify compatibility; no manufacturer affiliation or endorsement is claimed.\u003c\/p\u003e\u003c\/section\u003e\u003cnav data-related-links=\"products\" aria-label=\"Related resources\"\u003e\u003ch2\u003eRelated Resources\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"\/collections\/high-speed-handpiece-bearings\"\u003eBrowse all high-speed handpiece bearings\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/blogs\/repair-guides\"\u003eRead dental handpiece repair guides\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\u003c\/nav\u003e\u003cp\u003e\u003cstrong\u003eCompatibility notice:\u003c\/strong\u003e HP-HS-F3 is an internal reseller SKU. This is an independent third-party replacement bearing and is not manufactured, sponsored, authorized or endorsed by the handpiece manufacturer. Final fitment must be verified before installation.\u003c\/p\u003e","brand":"Handpiece Parts Hub","offers":[{"title":"Default Title","offer_id":64436785348977,"sku":"HP-HS-F3","price":4.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1033\/9893\/2849\/files\/HP-HS-F3.png?v=1787191451"},{"product_id":"hp-hs-f4-high-speed-dental-handpiece-bearing","title":"HP-HS-F4 High-Speed Bearing – SFR144TiZ1WN – 3.175 × 7.5 × 2.38 mm","description":"\u003cp\u003e\u003cstrong\u003eHP-HS-F4\u003c\/strong\u003e is an independent replacement bearing for professional high-speed dental handpiece repair. It is supplied under our internal HP reference so technicians can compare it with the original bearing before ordering.\u003c\/p\u003e\u003csection data-seo-geo=\"quick-answer\"\u003e\u003ch2\u003eQuick Answer\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eHP-HS-F4\u003c\/strong\u003e is a SFR144TiZ1WN high-speed dental handpiece bearing measuring 3.175 × 7.5 × 2.38 mm (ID × OD × W). It uses 440C rings + fabric-reinforced phenolic cage + Si3N4 ceramic balls and is rated above 400,000 RPM. Match the code, all three dimensions and construction details before ordering.\u003c\/p\u003e\u003c\/section\u003e\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eInternal SKU\u003c\/th\u003e\n\u003ctd\u003eHP-HS-F4\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eBearing code\u003c\/th\u003e\n\u003ctd\u003eSFR144TiZ1WN\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eDimensions\u003c\/th\u003e\n\u003ctd\u003e3.175 × 7.5 × 2.38 mm (ID × OD × W)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eRated speed\u003c\/th\u003e\n\u003ctd\u003e\u0026gt; 400,000 RPM\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eMaterial\u003c\/th\u003e\n\u003ctd\u003e440C rings + fabric-reinforced phenolic cage + Si3N4 ceramic balls\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eApplication\u003c\/th\u003e\n\u003ctd\u003eHigh-speed dental handpiece repair\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eNet weight\u003c\/th\u003e\n\u003ctd\u003e10 g\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003ePacked shipping weight\u003c\/th\u003e\n\u003ctd\u003e20 g\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\u003ch2\u003eBefore Ordering\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eMatch the bearing code and all three dimensions with the removed bearing.\u003c\/li\u003e\n\u003cli\u003eConfirm the ball and cage materials required for the repair.\u003c\/li\u003e\n\u003cli\u003eCheck shield, flange, groove and ring-width details where applicable.\u003c\/li\u003e\n\u003cli\u003eInstallation and functional testing should be completed by a qualified repair technician.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cdetails open\u003e\u003csummary\u003e\u003cstrong\u003eEnglish Bearing Code Reference\u003c\/strong\u003e\u003c\/summary\u003e\u003cp\u003eUse this table to read common high-speed handpiece bearing designations. The product-specific specifications above take priority whenever a code is not present or the construction differs.\u003c\/p\u003e\n\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth scope=\"col\"\u003eCode\u003c\/th\u003e\n\u003cth scope=\"col\"\u003eMeaning\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eS\u003c\/th\u003e\n\u003ctd\u003eMaterial-series prefix. Refer to the product-specific Material row above for the actual ring, cage and ball materials.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eF\u003c\/th\u003e\n\u003ctd\u003eThrust flange on the outer ring. With a 2.38 mm outer-ring width, the flange is 0.60 mm wide; with a 2.78 mm outer-ring width, it is 0.80 mm wide. For a grooved outer ring (G), the flange is 0.45 mm wide.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eR144\u003c\/th\u003e\n\u003ctd\u003eR144 is the basic series used in this designation. The listed dimensions for this SKU are 3.175 × 7.5 × 2.38 mm (ID × OD × W).\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eK1 \/ K2\u003c\/th\u003e\n\u003ctd\u003eAngular-contact construction. K1 indicates a separable inner ring; K2 indicates a separable outer ring. Angular-contact versions use a one-piece cage.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eTA \/ TL \/ Ti\u003c\/th\u003e\n\u003ctd\u003eCage material. TA: yellow polyimide; TL: black polyimide (Torlon); Ti: fabric-reinforced phenolic.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eK \/ G\u003c\/th\u003e\n\u003ctd\u003eOuter-ring profile. K indicates a stepped outer diameter; G indicates a grooved outer diameter.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eZ \/ Z1\u003c\/th\u003e\n\u003ctd\u003eShield configuration. Z indicates a one-sided shield; Z1 indicates an integral one-sided shield.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eW \/ W02\u003c\/th\u003e\n\u003ctd\u003eWidth code. W means both rings are 2.78 mm wide. W02 means the outer ring is 2.38 mm and the inner ring is 2.78 mm. With no width code, both rings are 2.38 mm wide.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eN\u003c\/th\u003e\n\u003ctd\u003eBall material. N indicates Si3N4 silicon-nitride ceramic balls. With no N code, the balls are 9Cr18Mo \/ AISI 440C steel.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003c\/details\u003e\u003csection data-seo-geo=\"common-questions\"\u003e\u003ch2\u003eCommon Questions\u003c\/h2\u003e\n\u003ch3\u003eWhat is HP-HS-F4?\u003c\/h3\u003e\n\u003cp\u003eHP-HS-F4 is our internal reference for a SFR144TiZ1WN replacement bearing. Its listed size is 3.175 × 7.5 × 2.38 mm (ID × OD × W), with ceramic balls and a phenolic cage.\u003c\/p\u003e\n\u003ch3\u003eHow do I confirm that this bearing will fit?\u003c\/h3\u003e\n\u003cp\u003eCompare the bearing code and the inner diameter, outer diameter and width with the removed bearing. Then confirm any shield, flange, groove, cage and ball-material requirements. A qualified handpiece repair technician should make the final fitment decision.\u003c\/p\u003e\n\u003ch3\u003eIs this an OEM bearing?\u003c\/h3\u003e\n\u003cp\u003eNo. This is an independent third-party replacement bearing. Brand and model names, when mentioned, are used only to identify compatibility; no manufacturer affiliation or endorsement is claimed.\u003c\/p\u003e\u003c\/section\u003e\u003cnav data-related-links=\"products\" aria-label=\"Related resources\"\u003e\u003ch2\u003eRelated Resources\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"\/collections\/high-speed-handpiece-bearings\"\u003eBrowse all high-speed handpiece bearings\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/blogs\/repair-guides\"\u003eRead dental handpiece repair guides\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\u003c\/nav\u003e\u003cp\u003e\u003cstrong\u003eCompatibility notice:\u003c\/strong\u003e HP-HS-F4 is an internal reseller SKU. This is an independent third-party replacement bearing and is not manufactured, sponsored, authorized or endorsed by the handpiece manufacturer. Final fitment must be verified before installation.\u003c\/p\u003e","brand":"Handpiece Parts Hub","offers":[{"title":"Default Title","offer_id":64436785381745,"sku":"HP-HS-F4","price":4.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1033\/9893\/2849\/files\/HP-HS-F4.png?v=1787191451"},{"product_id":"hp-hs-f5-high-speed-dental-handpiece-bearing","title":"HP-HS-F5 High-Speed Bearing – SFR144K1TiGZ1WN – 3.175 × 7.5 × 2.78 mm","description":"\u003cp\u003e\u003cstrong\u003eHP-HS-F5\u003c\/strong\u003e is an independent replacement bearing for professional high-speed dental handpiece repair. It is supplied under our internal HP reference so technicians can compare it with the original bearing before ordering.\u003c\/p\u003e\u003csection data-seo-geo=\"quick-answer\"\u003e\u003ch2\u003eQuick Answer\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eHP-HS-F5\u003c\/strong\u003e is a SFR144K1TiGZ1WN high-speed dental handpiece bearing measuring 3.175 × 7.5 × 2.78 mm (ID × OD × W). It uses 440C rings + fabric-reinforced phenolic cage + Si3N4 ceramic balls and is rated above 400,000 RPM. Match the code, all three dimensions and construction details before ordering.\u003c\/p\u003e\u003c\/section\u003e\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eInternal SKU\u003c\/th\u003e\n\u003ctd\u003eHP-HS-F5\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eBearing code\u003c\/th\u003e\n\u003ctd\u003eSFR144K1TiGZ1WN\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eDimensions\u003c\/th\u003e\n\u003ctd\u003e3.175 × 7.5 × 2.78 mm (ID × OD × W)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eRated speed\u003c\/th\u003e\n\u003ctd\u003e\u0026gt; 400,000 RPM\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eMaterial\u003c\/th\u003e\n\u003ctd\u003e440C rings + fabric-reinforced phenolic cage + Si3N4 ceramic balls\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eApplication\u003c\/th\u003e\n\u003ctd\u003eHigh-speed dental handpiece repair\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eNet weight\u003c\/th\u003e\n\u003ctd\u003e10 g\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003ePacked shipping weight\u003c\/th\u003e\n\u003ctd\u003e20 g\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\u003ch2\u003eBefore Ordering\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eMatch the bearing code and all three dimensions with the removed bearing.\u003c\/li\u003e\n\u003cli\u003eConfirm the ball and cage materials required for the repair.\u003c\/li\u003e\n\u003cli\u003eCheck shield, flange, groove and ring-width details where applicable.\u003c\/li\u003e\n\u003cli\u003eInstallation and functional testing should be completed by a qualified repair technician.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cdetails open\u003e\u003csummary\u003e\u003cstrong\u003eEnglish Bearing Code Reference\u003c\/strong\u003e\u003c\/summary\u003e\u003cp\u003eUse this table to read common high-speed handpiece bearing designations. The product-specific specifications above take priority whenever a code is not present or the construction differs.\u003c\/p\u003e\n\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth scope=\"col\"\u003eCode\u003c\/th\u003e\n\u003cth scope=\"col\"\u003eMeaning\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eS\u003c\/th\u003e\n\u003ctd\u003eMaterial-series prefix. Refer to the product-specific Material row above for the actual ring, cage and ball materials.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eF\u003c\/th\u003e\n\u003ctd\u003eThrust flange on the outer ring. With a 2.38 mm outer-ring width, the flange is 0.60 mm wide; with a 2.78 mm outer-ring width, it is 0.80 mm wide. For a grooved outer ring (G), the flange is 0.45 mm wide.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eR144\u003c\/th\u003e\n\u003ctd\u003eR144 is the basic series used in this designation. The listed dimensions for this SKU are 3.175 × 7.5 × 2.78 mm (ID × OD × W).\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eK1 \/ K2\u003c\/th\u003e\n\u003ctd\u003eAngular-contact construction. K1 indicates a separable inner ring; K2 indicates a separable outer ring. Angular-contact versions use a one-piece cage.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eTA \/ TL \/ Ti\u003c\/th\u003e\n\u003ctd\u003eCage material. TA: yellow polyimide; TL: black polyimide (Torlon); Ti: fabric-reinforced phenolic.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eK \/ G\u003c\/th\u003e\n\u003ctd\u003eOuter-ring profile. K indicates a stepped outer diameter; G indicates a grooved outer diameter.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eZ \/ Z1\u003c\/th\u003e\n\u003ctd\u003eShield configuration. Z indicates a one-sided shield; Z1 indicates an integral one-sided shield.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eW \/ W02\u003c\/th\u003e\n\u003ctd\u003eWidth code. W means both rings are 2.78 mm wide. W02 means the outer ring is 2.38 mm and the inner ring is 2.78 mm. With no width code, both rings are 2.38 mm wide.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eN\u003c\/th\u003e\n\u003ctd\u003eBall material. N indicates Si3N4 silicon-nitride ceramic balls. With no N code, the balls are 9Cr18Mo \/ AISI 440C steel.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003c\/details\u003e\u003csection data-seo-geo=\"common-questions\"\u003e\u003ch2\u003eCommon Questions\u003c\/h2\u003e\n\u003ch3\u003eWhat is HP-HS-F5?\u003c\/h3\u003e\n\u003cp\u003eHP-HS-F5 is our internal reference for a SFR144K1TiGZ1WN replacement bearing. Its listed size is 3.175 × 7.5 × 2.78 mm (ID × OD × W), with ceramic balls and a phenolic cage.\u003c\/p\u003e\n\u003ch3\u003eHow do I confirm that this bearing will fit?\u003c\/h3\u003e\n\u003cp\u003eCompare the bearing code and the inner diameter, outer diameter and width with the removed bearing. Then confirm any shield, flange, groove, cage and ball-material requirements. A qualified handpiece repair technician should make the final fitment decision.\u003c\/p\u003e\n\u003ch3\u003eIs this an OEM bearing?\u003c\/h3\u003e\n\u003cp\u003eNo. This is an independent third-party replacement bearing. Brand and model names, when mentioned, are used only to identify compatibility; no manufacturer affiliation or endorsement is claimed.\u003c\/p\u003e\u003c\/section\u003e\u003cnav data-related-links=\"products\" aria-label=\"Related resources\"\u003e\u003ch2\u003eRelated Resources\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"\/collections\/high-speed-handpiece-bearings\"\u003eBrowse all high-speed handpiece bearings\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/blogs\/repair-guides\"\u003eRead dental handpiece repair guides\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\u003c\/nav\u003e\u003cp\u003e\u003cstrong\u003eCompatibility notice:\u003c\/strong\u003e HP-HS-F5 is an internal reseller SKU. This is an independent third-party replacement bearing and is not manufactured, sponsored, authorized or endorsed by the handpiece manufacturer. Final fitment must be verified before installation.\u003c\/p\u003e","brand":"Handpiece Parts Hub","offers":[{"title":"Default Title","offer_id":64436785414513,"sku":"HP-HS-F5","price":4.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1033\/9893\/2849\/files\/HP-HS-F5.png?v=1787191451"},{"product_id":"hp-hs-g1-high-speed-dental-handpiece-bearing","title":"HP-HS-G1 High-Speed Bearing – SR2-5TLZWN – 3.175 × 7.938 × 3.571 mm","description":"\u003cp\u003e\u003cstrong\u003eHP-HS-G1\u003c\/strong\u003e is an independent replacement bearing for professional high-speed dental handpiece repair. It is supplied under our internal HP reference so technicians can compare it with the original bearing before ordering.\u003c\/p\u003e\u003csection data-seo-geo=\"quick-answer\"\u003e\u003ch2\u003eQuick Answer\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eHP-HS-G1\u003c\/strong\u003e is a SR2-5TLZWN high-speed dental handpiece bearing measuring 3.175 × 7.938 × 3.571 mm (ID × OD × W). It uses 440C rings + Torlon polyimide cage + Si3N4 ceramic balls and is rated above 400,000 RPM. Match the code, all three dimensions and construction details before ordering.\u003c\/p\u003e\u003c\/section\u003e\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eInternal SKU\u003c\/th\u003e\n\u003ctd\u003eHP-HS-G1\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eBearing code\u003c\/th\u003e\n\u003ctd\u003eSR2-5TLZWN\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eDimensions\u003c\/th\u003e\n\u003ctd\u003e3.175 × 7.938 × 3.571 mm (ID × OD × W)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eRated speed\u003c\/th\u003e\n\u003ctd\u003e\u0026gt; 400,000 RPM\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eMaterial\u003c\/th\u003e\n\u003ctd\u003e440C rings + Torlon polyimide cage + Si3N4 ceramic balls\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eApplication\u003c\/th\u003e\n\u003ctd\u003eHigh-speed dental handpiece repair\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eNet weight\u003c\/th\u003e\n\u003ctd\u003e10 g\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003ePacked shipping weight\u003c\/th\u003e\n\u003ctd\u003e20 g\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\u003ch2\u003eBefore Ordering\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eMatch the bearing code and all three dimensions with the removed bearing.\u003c\/li\u003e\n\u003cli\u003eConfirm the ball and cage materials required for the repair.\u003c\/li\u003e\n\u003cli\u003eCheck shield, flange, groove and ring-width details where applicable.\u003c\/li\u003e\n\u003cli\u003eInstallation and functional testing should be completed by a qualified repair technician.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cdetails open\u003e\u003csummary\u003e\u003cstrong\u003eEnglish Bearing Code Reference\u003c\/strong\u003e\u003c\/summary\u003e\u003cp\u003eUse this table to read common high-speed handpiece bearing designations. The product-specific specifications above take priority whenever a code is not present or the construction differs.\u003c\/p\u003e\n\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth scope=\"col\"\u003eCode\u003c\/th\u003e\n\u003cth scope=\"col\"\u003eMeaning\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eS\u003c\/th\u003e\n\u003ctd\u003eMaterial-series prefix. Refer to the product-specific Material row above for the actual ring, cage and ball materials.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eF\u003c\/th\u003e\n\u003ctd\u003eThrust flange on the outer ring. With a 2.38 mm outer-ring width, the flange is 0.60 mm wide; with a 2.78 mm outer-ring width, it is 0.80 mm wide. For a grooved outer ring (G), the flange is 0.45 mm wide.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eR2-5\u003c\/th\u003e\n\u003ctd\u003eR2-5 is the basic series used in this designation. The listed dimensions for this SKU are 3.175 × 7.938 × 3.571 mm (ID × OD × W).\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eK1 \/ K2\u003c\/th\u003e\n\u003ctd\u003eAngular-contact construction. K1 indicates a separable inner ring; K2 indicates a separable outer ring. Angular-contact versions use a one-piece cage.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eTA \/ TL \/ Ti\u003c\/th\u003e\n\u003ctd\u003eCage material. TA: yellow polyimide; TL: black polyimide (Torlon); Ti: fabric-reinforced phenolic.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eK \/ G\u003c\/th\u003e\n\u003ctd\u003eOuter-ring profile. K indicates a stepped outer diameter; G indicates a grooved outer diameter.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eZ \/ Z1\u003c\/th\u003e\n\u003ctd\u003eShield configuration. Z indicates a one-sided shield; Z1 indicates an integral one-sided shield.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eW \/ W02\u003c\/th\u003e\n\u003ctd\u003eWidth code. W means both rings are 2.78 mm wide. W02 means the outer ring is 2.38 mm and the inner ring is 2.78 mm. With no width code, both rings are 2.38 mm wide.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eN\u003c\/th\u003e\n\u003ctd\u003eBall material. N indicates Si3N4 silicon-nitride ceramic balls. With no N code, the balls are 9Cr18Mo \/ AISI 440C steel.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003c\/details\u003e\u003csection data-seo-geo=\"common-questions\"\u003e\u003ch2\u003eCommon Questions\u003c\/h2\u003e\n\u003ch3\u003eWhat is HP-HS-G1?\u003c\/h3\u003e\n\u003cp\u003eHP-HS-G1 is our internal reference for a SR2-5TLZWN replacement bearing. Its listed size is 3.175 × 7.938 × 3.571 mm (ID × OD × W), with ceramic balls and a Torlon cage.\u003c\/p\u003e\n\u003ch3\u003eHow do I confirm that this bearing will fit?\u003c\/h3\u003e\n\u003cp\u003eCompare the bearing code and the inner diameter, outer diameter and width with the removed bearing. Then confirm any shield, flange, groove, cage and ball-material requirements. A qualified handpiece repair technician should make the final fitment decision.\u003c\/p\u003e\n\u003ch3\u003eIs this an OEM bearing?\u003c\/h3\u003e\n\u003cp\u003eNo. This is an independent third-party replacement bearing. Brand and model names, when mentioned, are used only to identify compatibility; no manufacturer affiliation or endorsement is claimed.\u003c\/p\u003e\u003c\/section\u003e\u003cnav data-related-links=\"products\" aria-label=\"Related resources\"\u003e\u003ch2\u003eRelated Resources\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"\/collections\/high-speed-handpiece-bearings\"\u003eBrowse all high-speed handpiece bearings\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/blogs\/repair-guides\"\u003eRead dental handpiece repair guides\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\u003c\/nav\u003e\u003cp\u003e\u003cstrong\u003eCompatibility notice:\u003c\/strong\u003e HP-HS-G1 is an internal reseller SKU. This is an independent third-party replacement bearing and is not manufactured, sponsored, authorized or endorsed by the handpiece manufacturer. Final fitment must be verified before installation.\u003c\/p\u003e","brand":"Handpiece Parts Hub","offers":[{"title":"Default Title","offer_id":64436785447281,"sku":"HP-HS-G1","price":5.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1033\/9893\/2849\/files\/HP-HS-G1.png?v=1787191451"},{"product_id":"hp-hs-h1-high-speed-dental-handpiece-bearing","title":"HP-HS-H1 High-Speed Bearing – SFFR144TLGZWN – 3.175 × 7.5 × 2.78 mm","description":"\u003cp\u003e\u003cstrong\u003eHP-HS-H1\u003c\/strong\u003e is an independent replacement bearing for professional high-speed dental handpiece repair. It is supplied under our internal HP reference so technicians can compare it with the original bearing before ordering.\u003c\/p\u003e\u003csection data-seo-geo=\"quick-answer\"\u003e\u003ch2\u003eQuick Answer\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eHP-HS-H1\u003c\/strong\u003e is a SFFR144TLGZWN high-speed dental handpiece bearing measuring 3.175 × 7.5 × 2.78 mm (ID × OD × W). It uses 440C rings + Torlon polyimide cage + Si3N4 ceramic balls and is rated above 400,000 RPM. Match the code, all three dimensions and construction details before ordering.\u003c\/p\u003e\u003c\/section\u003e\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eInternal SKU\u003c\/th\u003e\n\u003ctd\u003eHP-HS-H1\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eBearing code\u003c\/th\u003e\n\u003ctd\u003eSFFR144TLGZWN\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eDimensions\u003c\/th\u003e\n\u003ctd\u003e3.175 × 7.5 × 2.78 mm (ID × OD × W)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eRated speed\u003c\/th\u003e\n\u003ctd\u003e\u0026gt; 400,000 RPM\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eMaterial\u003c\/th\u003e\n\u003ctd\u003e440C rings + Torlon polyimide cage + Si3N4 ceramic balls\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eApplication\u003c\/th\u003e\n\u003ctd\u003eHigh-speed dental handpiece repair\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eNet weight\u003c\/th\u003e\n\u003ctd\u003e10 g\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003ePacked shipping weight\u003c\/th\u003e\n\u003ctd\u003e20 g\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\u003ch2\u003eBefore Ordering\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eMatch the bearing code and all three dimensions with the removed bearing.\u003c\/li\u003e\n\u003cli\u003eConfirm the ball and cage materials required for the repair.\u003c\/li\u003e\n\u003cli\u003eCheck shield, flange, groove and ring-width details where applicable.\u003c\/li\u003e\n\u003cli\u003eInstallation and functional testing should be completed by a qualified repair technician.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cdetails open\u003e\u003csummary\u003e\u003cstrong\u003eEnglish Bearing Code Reference\u003c\/strong\u003e\u003c\/summary\u003e\u003cp\u003eUse this table to read common high-speed handpiece bearing designations. The product-specific specifications above take priority whenever a code is not present or the construction differs.\u003c\/p\u003e\n\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth scope=\"col\"\u003eCode\u003c\/th\u003e\n\u003cth scope=\"col\"\u003eMeaning\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eS\u003c\/th\u003e\n\u003ctd\u003eMaterial-series prefix. Refer to the product-specific Material row above for the actual ring, cage and ball materials.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eF\u003c\/th\u003e\n\u003ctd\u003eThrust flange on the outer ring. With a 2.38 mm outer-ring width, the flange is 0.60 mm wide; with a 2.78 mm outer-ring width, it is 0.80 mm wide. For a grooved outer ring (G), the flange is 0.45 mm wide.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eR144\u003c\/th\u003e\n\u003ctd\u003eR144 is the basic series used in this designation. The listed dimensions for this SKU are 3.175 × 7.5 × 2.78 mm (ID × OD × W).\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eK1 \/ K2\u003c\/th\u003e\n\u003ctd\u003eAngular-contact construction. K1 indicates a separable inner ring; K2 indicates a separable outer ring. Angular-contact versions use a one-piece cage.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eTA \/ TL \/ Ti\u003c\/th\u003e\n\u003ctd\u003eCage material. TA: yellow polyimide; TL: black polyimide (Torlon); Ti: fabric-reinforced phenolic.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eK \/ G\u003c\/th\u003e\n\u003ctd\u003eOuter-ring profile. K indicates a stepped outer diameter; G indicates a grooved outer diameter.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eZ \/ Z1\u003c\/th\u003e\n\u003ctd\u003eShield configuration. Z indicates a one-sided shield; Z1 indicates an integral one-sided shield.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eW \/ W02\u003c\/th\u003e\n\u003ctd\u003eWidth code. W means both rings are 2.78 mm wide. W02 means the outer ring is 2.38 mm and the inner ring is 2.78 mm. With no width code, both rings are 2.38 mm wide.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eN\u003c\/th\u003e\n\u003ctd\u003eBall material. N indicates Si3N4 silicon-nitride ceramic balls. With no N code, the balls are 9Cr18Mo \/ AISI 440C steel.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003c\/details\u003e\u003csection data-seo-geo=\"common-questions\"\u003e\u003ch2\u003eCommon Questions\u003c\/h2\u003e\n\u003ch3\u003eWhat is HP-HS-H1?\u003c\/h3\u003e\n\u003cp\u003eHP-HS-H1 is our internal reference for a SFFR144TLGZWN replacement bearing. Its listed size is 3.175 × 7.5 × 2.78 mm (ID × OD × W), with ceramic balls and a Torlon cage.\u003c\/p\u003e\n\u003ch3\u003eHow do I confirm that this bearing will fit?\u003c\/h3\u003e\n\u003cp\u003eCompare the bearing code and the inner diameter, outer diameter and width with the removed bearing. Then confirm any shield, flange, groove, cage and ball-material requirements. A qualified handpiece repair technician should make the final fitment decision.\u003c\/p\u003e\n\u003ch3\u003eIs this an OEM bearing?\u003c\/h3\u003e\n\u003cp\u003eNo. This is an independent third-party replacement bearing. Brand and model names, when mentioned, are used only to identify compatibility; no manufacturer affiliation or endorsement is claimed.\u003c\/p\u003e\u003c\/section\u003e\u003cnav data-related-links=\"products\" aria-label=\"Related resources\"\u003e\u003ch2\u003eRelated Resources\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"\/collections\/high-speed-handpiece-bearings\"\u003eBrowse all high-speed handpiece bearings\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/blogs\/repair-guides\"\u003eRead dental handpiece repair guides\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\u003c\/nav\u003e\u003cp\u003e\u003cstrong\u003eCompatibility notice:\u003c\/strong\u003e HP-HS-H1 is an internal reseller SKU. This is an independent third-party replacement bearing and is not manufactured, sponsored, authorized or endorsed by the handpiece manufacturer. Final fitment must be verified before installation.\u003c\/p\u003e","brand":"Handpiece Parts Hub","offers":[{"title":"Default Title","offer_id":64436785480049,"sku":"HP-HS-H1","price":6.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1033\/9893\/2849\/files\/HP-HS-H1.png?v=1787191451"},{"product_id":"hp-hs-k1-high-speed-dental-handpiece-bearing","title":"HP-HS-K1 High-Speed Bearing – SR144TLKZWO2N – 3.175 × 6.35 × 2.78 mm","description":"\u003cp\u003e\u003cstrong\u003eHP-HS-K1\u003c\/strong\u003e is an independent replacement bearing for professional high-speed dental handpiece repair. It is supplied under our internal HP reference so technicians can compare it with the original bearing before ordering.\u003c\/p\u003e\u003csection data-seo-geo=\"quick-answer\"\u003e\u003ch2\u003eQuick Answer\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eHP-HS-K1\u003c\/strong\u003e is a SR144TLKZWO2N high-speed dental handpiece bearing measuring 3.175 × 6.35 × 2.78 mm (ID × OD × W). It uses 440C rings + Torlon polyimide cage + Si3N4 ceramic balls and is rated above 400,000 RPM. Match the code, all three dimensions and construction details before ordering.\u003c\/p\u003e\u003c\/section\u003e\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eInternal SKU\u003c\/th\u003e\n\u003ctd\u003eHP-HS-K1\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eBearing code\u003c\/th\u003e\n\u003ctd\u003eSR144TLKZWO2N\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eDimensions\u003c\/th\u003e\n\u003ctd\u003e3.175 × 6.35 × 2.78 mm (ID × OD × W)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eRated speed\u003c\/th\u003e\n\u003ctd\u003e\u0026gt; 400,000 RPM\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eMaterial\u003c\/th\u003e\n\u003ctd\u003e440C rings + Torlon polyimide cage + Si3N4 ceramic balls\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eApplication\u003c\/th\u003e\n\u003ctd\u003eHigh-speed dental handpiece repair\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eNet weight\u003c\/th\u003e\n\u003ctd\u003e10 g\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003ePacked shipping weight\u003c\/th\u003e\n\u003ctd\u003e20 g\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\u003ch2\u003eBefore Ordering\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eMatch the bearing code and all three dimensions with the removed bearing.\u003c\/li\u003e\n\u003cli\u003eConfirm the ball and cage materials required for the repair.\u003c\/li\u003e\n\u003cli\u003eCheck shield, flange, groove and ring-width details where applicable.\u003c\/li\u003e\n\u003cli\u003eInstallation and functional testing should be completed by a qualified repair technician.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cdetails open\u003e\u003csummary\u003e\u003cstrong\u003eEnglish Bearing Code Reference\u003c\/strong\u003e\u003c\/summary\u003e\u003cp\u003eUse this table to read common high-speed handpiece bearing designations. The product-specific specifications above take priority whenever a code is not present or the construction differs.\u003c\/p\u003e\n\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth scope=\"col\"\u003eCode\u003c\/th\u003e\n\u003cth scope=\"col\"\u003eMeaning\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eS\u003c\/th\u003e\n\u003ctd\u003eMaterial-series prefix. Refer to the product-specific Material row above for the actual ring, cage and ball materials.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eF\u003c\/th\u003e\n\u003ctd\u003eThrust flange on the outer ring. With a 2.38 mm outer-ring width, the flange is 0.60 mm wide; with a 2.78 mm outer-ring width, it is 0.80 mm wide. For a grooved outer ring (G), the flange is 0.45 mm wide.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eR144\u003c\/th\u003e\n\u003ctd\u003eR144 is the basic series used in this designation. The listed dimensions for this SKU are 3.175 × 6.35 × 2.78 mm (ID × OD × W).\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eK1 \/ K2\u003c\/th\u003e\n\u003ctd\u003eAngular-contact construction. K1 indicates a separable inner ring; K2 indicates a separable outer ring. Angular-contact versions use a one-piece cage.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eTA \/ TL \/ Ti\u003c\/th\u003e\n\u003ctd\u003eCage material. TA: yellow polyimide; TL: black polyimide (Torlon); Ti: fabric-reinforced phenolic.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eK \/ G\u003c\/th\u003e\n\u003ctd\u003eOuter-ring profile. K indicates a stepped outer diameter; G indicates a grooved outer diameter.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eZ \/ Z1\u003c\/th\u003e\n\u003ctd\u003eShield configuration. Z indicates a one-sided shield; Z1 indicates an integral one-sided shield.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eW \/ W02\u003c\/th\u003e\n\u003ctd\u003eWidth code. W means both rings are 2.78 mm wide. W02 means the outer ring is 2.38 mm and the inner ring is 2.78 mm. With no width code, both rings are 2.38 mm wide.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eN\u003c\/th\u003e\n\u003ctd\u003eBall material. N indicates Si3N4 silicon-nitride ceramic balls. With no N code, the balls are 9Cr18Mo \/ AISI 440C steel.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003c\/details\u003e\u003csection data-seo-geo=\"common-questions\"\u003e\u003ch2\u003eCommon Questions\u003c\/h2\u003e\n\u003ch3\u003eWhat is HP-HS-K1?\u003c\/h3\u003e\n\u003cp\u003eHP-HS-K1 is our internal reference for a SR144TLKZWO2N replacement bearing. Its listed size is 3.175 × 6.35 × 2.78 mm (ID × OD × W), with ceramic balls and a Torlon cage.\u003c\/p\u003e\n\u003ch3\u003eHow do I confirm that this bearing will fit?\u003c\/h3\u003e\n\u003cp\u003eCompare the bearing code and the inner diameter, outer diameter and width with the removed bearing. Then confirm any shield, flange, groove, cage and ball-material requirements. A qualified handpiece repair technician should make the final fitment decision.\u003c\/p\u003e\n\u003ch3\u003eIs this an OEM bearing?\u003c\/h3\u003e\n\u003cp\u003eNo. This is an independent third-party replacement bearing. Brand and model names, when mentioned, are used only to identify compatibility; no manufacturer affiliation or endorsement is claimed.\u003c\/p\u003e\u003c\/section\u003e\u003cnav data-related-links=\"products\" aria-label=\"Related resources\"\u003e\u003ch2\u003eRelated Resources\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"\/collections\/high-speed-handpiece-bearings\"\u003eBrowse all high-speed handpiece bearings\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/blogs\/repair-guides\"\u003eRead dental handpiece repair guides\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\u003c\/nav\u003e\u003cp\u003e\u003cstrong\u003eCompatibility notice:\u003c\/strong\u003e HP-HS-K1 is an internal reseller SKU. This is an independent third-party replacement bearing and is not manufactured, sponsored, authorized or endorsed by the handpiece manufacturer. Final fitment must be verified before installation.\u003c\/p\u003e","brand":"Handpiece Parts Hub","offers":[{"title":"Default Title","offer_id":64436785512817,"sku":"HP-HS-K1","price":7.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1033\/9893\/2849\/files\/HP-HS-K1.png?v=1787191451"},{"product_id":"hp-hs-m1-high-speed-dental-handpiece-bearing","title":"HP-HS-M1 High-Speed Bearing – S628-3TL – 3 × 7.5 × 2.5 mm","description":"\u003cp\u003e\u003cstrong\u003eHP-HS-M1\u003c\/strong\u003e is an independent replacement bearing for professional high-speed dental handpiece repair. It is supplied under our internal HP reference so technicians can compare it with the original bearing before ordering.\u003c\/p\u003e\u003csection data-seo-geo=\"quick-answer\"\u003e\u003ch2\u003eQuick Answer\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eHP-HS-M1\u003c\/strong\u003e is a S628-3TL high-speed dental handpiece bearing measuring 3 × 7.5 × 2.5 mm (ID × OD × W). It uses 440C rings + Torlon polyimide cage + 440C steel balls and is rated above 400,000 RPM. Match the code, all three dimensions and construction details before ordering.\u003c\/p\u003e\u003c\/section\u003e\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eInternal SKU\u003c\/th\u003e\n\u003ctd\u003eHP-HS-M1\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eBearing code\u003c\/th\u003e\n\u003ctd\u003eS628-3TL\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eDimensions\u003c\/th\u003e\n\u003ctd\u003e3 × 7.5 × 2.5 mm (ID × OD × W)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eRated speed\u003c\/th\u003e\n\u003ctd\u003e\u0026gt; 400,000 RPM\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eMaterial\u003c\/th\u003e\n\u003ctd\u003e440C rings + Torlon polyimide cage + 440C steel balls\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eApplication\u003c\/th\u003e\n\u003ctd\u003eHigh-speed dental handpiece repair\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eNet weight\u003c\/th\u003e\n\u003ctd\u003e10 g\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003ePacked shipping weight\u003c\/th\u003e\n\u003ctd\u003e20 g\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\u003ch2\u003eBefore Ordering\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eMatch the bearing code and all three dimensions with the removed bearing.\u003c\/li\u003e\n\u003cli\u003eConfirm the ball and cage materials required for the repair.\u003c\/li\u003e\n\u003cli\u003eCheck shield, flange, groove and ring-width details where applicable.\u003c\/li\u003e\n\u003cli\u003eInstallation and functional testing should be completed by a qualified repair technician.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cdetails open\u003e\u003csummary\u003e\u003cstrong\u003eEnglish Bearing Code Reference\u003c\/strong\u003e\u003c\/summary\u003e\u003cp\u003eUse this table to read common high-speed handpiece bearing designations. The product-specific specifications above take priority whenever a code is not present or the construction differs.\u003c\/p\u003e\n\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth scope=\"col\"\u003eCode\u003c\/th\u003e\n\u003cth scope=\"col\"\u003eMeaning\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eS\u003c\/th\u003e\n\u003ctd\u003eMaterial-series prefix. Refer to the product-specific Material row above for the actual ring, cage and ball materials.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eF\u003c\/th\u003e\n\u003ctd\u003eThrust flange on the outer ring. With a 2.38 mm outer-ring width, the flange is 0.60 mm wide; with a 2.78 mm outer-ring width, it is 0.80 mm wide. For a grooved outer ring (G), the flange is 0.45 mm wide.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003e628-3\u003c\/th\u003e\n\u003ctd\u003e628-3 is the basic series used in this designation. The listed dimensions for this SKU are 3 × 7.5 × 2.5 mm (ID × OD × W).\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eK1 \/ K2\u003c\/th\u003e\n\u003ctd\u003eAngular-contact construction. K1 indicates a separable inner ring; K2 indicates a separable outer ring. Angular-contact versions use a one-piece cage.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eTA \/ TL \/ Ti\u003c\/th\u003e\n\u003ctd\u003eCage material. TA: yellow polyimide; TL: black polyimide (Torlon); Ti: fabric-reinforced phenolic.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eK \/ G\u003c\/th\u003e\n\u003ctd\u003eOuter-ring profile. K indicates a stepped outer diameter; G indicates a grooved outer diameter.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eZ \/ Z1\u003c\/th\u003e\n\u003ctd\u003eShield configuration. Z indicates a one-sided shield; Z1 indicates an integral one-sided shield.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eW \/ W02\u003c\/th\u003e\n\u003ctd\u003eWidth code. W means both rings are 2.78 mm wide. W02 means the outer ring is 2.38 mm and the inner ring is 2.78 mm. With no width code, both rings are 2.38 mm wide.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eN\u003c\/th\u003e\n\u003ctd\u003eBall material. N indicates Si3N4 silicon-nitride ceramic balls. With no N code, the balls are 9Cr18Mo \/ AISI 440C steel.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003c\/details\u003e\u003csection data-seo-geo=\"common-questions\"\u003e\u003ch2\u003eCommon Questions\u003c\/h2\u003e\n\u003ch3\u003eWhat is HP-HS-M1?\u003c\/h3\u003e\n\u003cp\u003eHP-HS-M1 is our internal reference for a S628-3TL replacement bearing. Its listed size is 3 × 7.5 × 2.5 mm (ID × OD × W), with steel balls and a Torlon cage.\u003c\/p\u003e\n\u003ch3\u003eHow do I confirm that this bearing will fit?\u003c\/h3\u003e\n\u003cp\u003eCompare the bearing code and the inner diameter, outer diameter and width with the removed bearing. Then confirm any shield, flange, groove, cage and ball-material requirements. A qualified handpiece repair technician should make the final fitment decision.\u003c\/p\u003e\n\u003ch3\u003eIs this an OEM bearing?\u003c\/h3\u003e\n\u003cp\u003eNo. This is an independent third-party replacement bearing. Brand and model names, when mentioned, are used only to identify compatibility; no manufacturer affiliation or endorsement is claimed.\u003c\/p\u003e\u003c\/section\u003e\u003cnav data-related-links=\"products\" aria-label=\"Related resources\"\u003e\u003ch2\u003eRelated Resources\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"\/collections\/high-speed-handpiece-bearings\"\u003eBrowse all high-speed handpiece bearings\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/blogs\/repair-guides\"\u003eRead dental handpiece repair guides\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\u003c\/nav\u003e\u003cp\u003e\u003cstrong\u003eCompatibility notice:\u003c\/strong\u003e HP-HS-M1 is an internal reseller SKU. This is an independent third-party replacement bearing and is not manufactured, sponsored, authorized or endorsed by the handpiece manufacturer. Final fitment must be verified before installation.\u003c\/p\u003e","brand":"Handpiece Parts Hub","offers":[{"title":"Default Title","offer_id":64436785545585,"sku":"HP-HS-M1","price":5.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1033\/9893\/2849\/files\/HP-HS-M1.png?v=1787191451"},{"product_id":"hp-hs-m2-high-speed-dental-handpiece-bearing","title":"HP-HS-M2 High-Speed Bearing – S628-3Ti – 3 × 7.5 × 2.5 mm","description":"\u003cp\u003e\u003cstrong\u003eHP-HS-M2\u003c\/strong\u003e is an independent replacement bearing for professional high-speed dental handpiece repair. It is supplied under our internal HP reference so technicians can compare it with the original bearing before ordering.\u003c\/p\u003e\u003csection data-seo-geo=\"quick-answer\"\u003e\u003ch2\u003eQuick Answer\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eHP-HS-M2\u003c\/strong\u003e is a S628-3Ti high-speed dental handpiece bearing measuring 3 × 7.5 × 2.5 mm (ID × OD × W). It uses 440C rings + fabric-reinforced phenolic cage + 440C steel balls and is rated above 400,000 RPM. Match the code, all three dimensions and construction details before ordering.\u003c\/p\u003e\u003c\/section\u003e\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eInternal SKU\u003c\/th\u003e\n\u003ctd\u003eHP-HS-M2\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eBearing code\u003c\/th\u003e\n\u003ctd\u003eS628-3Ti\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eDimensions\u003c\/th\u003e\n\u003ctd\u003e3 × 7.5 × 2.5 mm (ID × OD × W)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eRated speed\u003c\/th\u003e\n\u003ctd\u003e\u0026gt; 400,000 RPM\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eMaterial\u003c\/th\u003e\n\u003ctd\u003e440C rings + fabric-reinforced phenolic cage + 440C steel balls\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eApplication\u003c\/th\u003e\n\u003ctd\u003eHigh-speed dental handpiece repair\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eNet weight\u003c\/th\u003e\n\u003ctd\u003e10 g\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003ePacked shipping weight\u003c\/th\u003e\n\u003ctd\u003e20 g\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\u003ch2\u003eBefore Ordering\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eMatch the bearing code and all three dimensions with the removed bearing.\u003c\/li\u003e\n\u003cli\u003eConfirm the ball and cage materials required for the repair.\u003c\/li\u003e\n\u003cli\u003eCheck shield, flange, groove and ring-width details where applicable.\u003c\/li\u003e\n\u003cli\u003eInstallation and functional testing should be completed by a qualified repair technician.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cdetails open\u003e\u003csummary\u003e\u003cstrong\u003eEnglish Bearing Code Reference\u003c\/strong\u003e\u003c\/summary\u003e\u003cp\u003eUse this table to read common high-speed handpiece bearing designations. The product-specific specifications above take priority whenever a code is not present or the construction differs.\u003c\/p\u003e\n\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth scope=\"col\"\u003eCode\u003c\/th\u003e\n\u003cth scope=\"col\"\u003eMeaning\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eS\u003c\/th\u003e\n\u003ctd\u003eMaterial-series prefix. Refer to the product-specific Material row above for the actual ring, cage and ball materials.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eF\u003c\/th\u003e\n\u003ctd\u003eThrust flange on the outer ring. With a 2.38 mm outer-ring width, the flange is 0.60 mm wide; with a 2.78 mm outer-ring width, it is 0.80 mm wide. For a grooved outer ring (G), the flange is 0.45 mm wide.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003e628-3\u003c\/th\u003e\n\u003ctd\u003e628-3 is the basic series used in this designation. The listed dimensions for this SKU are 3 × 7.5 × 2.5 mm (ID × OD × W).\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eK1 \/ K2\u003c\/th\u003e\n\u003ctd\u003eAngular-contact construction. K1 indicates a separable inner ring; K2 indicates a separable outer ring. Angular-contact versions use a one-piece cage.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eTA \/ TL \/ Ti\u003c\/th\u003e\n\u003ctd\u003eCage material. TA: yellow polyimide; TL: black polyimide (Torlon); Ti: fabric-reinforced phenolic.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eK \/ G\u003c\/th\u003e\n\u003ctd\u003eOuter-ring profile. K indicates a stepped outer diameter; G indicates a grooved outer diameter.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eZ \/ Z1\u003c\/th\u003e\n\u003ctd\u003eShield configuration. Z indicates a one-sided shield; Z1 indicates an integral one-sided shield.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eW \/ W02\u003c\/th\u003e\n\u003ctd\u003eWidth code. W means both rings are 2.78 mm wide. W02 means the outer ring is 2.38 mm and the inner ring is 2.78 mm. With no width code, both rings are 2.38 mm wide.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eN\u003c\/th\u003e\n\u003ctd\u003eBall material. N indicates Si3N4 silicon-nitride ceramic balls. With no N code, the balls are 9Cr18Mo \/ AISI 440C steel.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003c\/details\u003e\u003csection data-seo-geo=\"common-questions\"\u003e\u003ch2\u003eCommon Questions\u003c\/h2\u003e\n\u003ch3\u003eWhat is HP-HS-M2?\u003c\/h3\u003e\n\u003cp\u003eHP-HS-M2 is our internal reference for a S628-3Ti replacement bearing. Its listed size is 3 × 7.5 × 2.5 mm (ID × OD × W), with steel balls and a phenolic cage.\u003c\/p\u003e\n\u003ch3\u003eHow do I confirm that this bearing will fit?\u003c\/h3\u003e\n\u003cp\u003eCompare the bearing code and the inner diameter, outer diameter and width with the removed bearing. Then confirm any shield, flange, groove, cage and ball-material requirements. A qualified handpiece repair technician should make the final fitment decision.\u003c\/p\u003e\n\u003ch3\u003eIs this an OEM bearing?\u003c\/h3\u003e\n\u003cp\u003eNo. This is an independent third-party replacement bearing. Brand and model names, when mentioned, are used only to identify compatibility; no manufacturer affiliation or endorsement is claimed.\u003c\/p\u003e\u003c\/section\u003e\u003cnav data-related-links=\"products\" aria-label=\"Related resources\"\u003e\u003ch2\u003eRelated Resources\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"\/collections\/high-speed-handpiece-bearings\"\u003eBrowse all high-speed handpiece bearings\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/blogs\/repair-guides\"\u003eRead dental handpiece repair guides\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\u003c\/nav\u003e\u003cp\u003e\u003cstrong\u003eCompatibility notice:\u003c\/strong\u003e HP-HS-M2 is an internal reseller SKU. This is an independent third-party replacement bearing and is not manufactured, sponsored, authorized or endorsed by the handpiece manufacturer. Final fitment must be verified before installation.\u003c\/p\u003e","brand":"Handpiece Parts Hub","offers":[{"title":"Default Title","offer_id":64436785578353,"sku":"HP-HS-M2","price":5.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1033\/9893\/2849\/files\/HP-HS-M2.png?v=1787191451"},{"product_id":"hp-hs-n1-high-speed-dental-handpiece-bearing","title":"HP-HS-N1 High-Speed Bearing – SMR52TL-1.5 – 2 × 5 × 1.5 mm","description":"\u003cp\u003e\u003cstrong\u003eHP-HS-N1\u003c\/strong\u003e is an independent replacement bearing for professional high-speed dental handpiece repair. It is supplied under our internal HP reference so technicians can compare it with the original bearing before ordering.\u003c\/p\u003e\u003csection data-seo-geo=\"quick-answer\"\u003e\u003ch2\u003eQuick Answer\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eHP-HS-N1\u003c\/strong\u003e is a SMR52TL-1.5 high-speed dental handpiece bearing measuring 2 × 5 × 1.5 mm (ID × OD × W). It uses 440C rings + Torlon polyimide cage + 440C steel balls and is rated above 400,000 RPM. Match the code, all three dimensions and construction details before ordering.\u003c\/p\u003e\u003c\/section\u003e\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eInternal SKU\u003c\/th\u003e\n\u003ctd\u003eHP-HS-N1\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eBearing code\u003c\/th\u003e\n\u003ctd\u003eSMR52TL-1.5\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eDimensions\u003c\/th\u003e\n\u003ctd\u003e2 × 5 × 1.5 mm (ID × OD × W)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eRated speed\u003c\/th\u003e\n\u003ctd\u003e\u0026gt; 400,000 RPM\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eMaterial\u003c\/th\u003e\n\u003ctd\u003e440C rings + Torlon polyimide cage + 440C steel balls\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eApplication\u003c\/th\u003e\n\u003ctd\u003eHigh-speed dental handpiece repair\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eNet weight\u003c\/th\u003e\n\u003ctd\u003e10 g\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003ePacked shipping weight\u003c\/th\u003e\n\u003ctd\u003e20 g\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\u003ch2\u003eBefore Ordering\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eMatch the bearing code and all three dimensions with the removed bearing.\u003c\/li\u003e\n\u003cli\u003eConfirm the ball and cage materials required for the repair.\u003c\/li\u003e\n\u003cli\u003eCheck shield, flange, groove and ring-width details where applicable.\u003c\/li\u003e\n\u003cli\u003eInstallation and functional testing should be completed by a qualified repair technician.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cdetails open\u003e\u003csummary\u003e\u003cstrong\u003eEnglish Bearing Code Reference\u003c\/strong\u003e\u003c\/summary\u003e\u003cp\u003eUse this table to read common high-speed handpiece bearing designations. The product-specific specifications above take priority whenever a code is not present or the construction differs.\u003c\/p\u003e\n\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth scope=\"col\"\u003eCode\u003c\/th\u003e\n\u003cth scope=\"col\"\u003eMeaning\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eS\u003c\/th\u003e\n\u003ctd\u003eMaterial-series prefix. Refer to the product-specific Material row above for the actual ring, cage and ball materials.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eF\u003c\/th\u003e\n\u003ctd\u003eThrust flange on the outer ring. With a 2.38 mm outer-ring width, the flange is 0.60 mm wide; with a 2.78 mm outer-ring width, it is 0.80 mm wide. For a grooved outer ring (G), the flange is 0.45 mm wide.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eMR52\u003c\/th\u003e\n\u003ctd\u003eMR52 is the basic series used in this designation. The listed dimensions for this SKU are 2 × 5 × 1.5 mm (ID × OD × W).\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eK1 \/ K2\u003c\/th\u003e\n\u003ctd\u003eAngular-contact construction. K1 indicates a separable inner ring; K2 indicates a separable outer ring. Angular-contact versions use a one-piece cage.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eTA \/ TL \/ Ti\u003c\/th\u003e\n\u003ctd\u003eCage material. TA: yellow polyimide; TL: black polyimide (Torlon); Ti: fabric-reinforced phenolic.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eK \/ G\u003c\/th\u003e\n\u003ctd\u003eOuter-ring profile. K indicates a stepped outer diameter; G indicates a grooved outer diameter.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eZ \/ Z1\u003c\/th\u003e\n\u003ctd\u003eShield configuration. Z indicates a one-sided shield; Z1 indicates an integral one-sided shield.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eW \/ W02\u003c\/th\u003e\n\u003ctd\u003eWidth code. W means both rings are 2.78 mm wide. W02 means the outer ring is 2.38 mm and the inner ring is 2.78 mm. With no width code, both rings are 2.38 mm wide.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eN\u003c\/th\u003e\n\u003ctd\u003eBall material. N indicates Si3N4 silicon-nitride ceramic balls. With no N code, the balls are 9Cr18Mo \/ AISI 440C steel.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003c\/details\u003e\u003csection data-seo-geo=\"common-questions\"\u003e\u003ch2\u003eCommon Questions\u003c\/h2\u003e\n\u003ch3\u003eWhat is HP-HS-N1?\u003c\/h3\u003e\n\u003cp\u003eHP-HS-N1 is our internal reference for a SMR52TL-1.5 replacement bearing. Its listed size is 2 × 5 × 1.5 mm (ID × OD × W), with steel balls and a Torlon cage.\u003c\/p\u003e\n\u003ch3\u003eHow do I confirm that this bearing will fit?\u003c\/h3\u003e\n\u003cp\u003eCompare the bearing code and the inner diameter, outer diameter and width with the removed bearing. Then confirm any shield, flange, groove, cage and ball-material requirements. A qualified handpiece repair technician should make the final fitment decision.\u003c\/p\u003e\n\u003ch3\u003eIs this an OEM bearing?\u003c\/h3\u003e\n\u003cp\u003eNo. This is an independent third-party replacement bearing. Brand and model names, when mentioned, are used only to identify compatibility; no manufacturer affiliation or endorsement is claimed.\u003c\/p\u003e\u003c\/section\u003e\u003cnav data-related-links=\"products\" aria-label=\"Related resources\"\u003e\u003ch2\u003eRelated Resources\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"\/collections\/high-speed-handpiece-bearings\"\u003eBrowse all high-speed handpiece bearings\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/blogs\/repair-guides\"\u003eRead dental handpiece repair guides\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\u003c\/nav\u003e\u003cp\u003e\u003cstrong\u003eCompatibility notice:\u003c\/strong\u003e HP-HS-N1 is an internal reseller SKU. This is an independent third-party replacement bearing and is not manufactured, sponsored, authorized or endorsed by the handpiece manufacturer. Final fitment must be verified before installation.\u003c\/p\u003e","brand":"Handpiece Parts Hub","offers":[{"title":"Default Title","offer_id":64436785611121,"sku":"HP-HS-N1","price":5.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1033\/9893\/2849\/files\/HP-HS-N1.png?v=1787191451"},{"product_id":"hp-hs-n2-high-speed-dental-handpiece-bearing","title":"HP-HS-N2 High-Speed Bearing – 2.38×5×1.5 TL – 2.38 × 5 × 1.5 mm","description":"\u003cp\u003e\u003cstrong\u003eHP-HS-N2\u003c\/strong\u003e is an independent replacement bearing for professional high-speed dental handpiece repair. It is supplied under our internal HP reference so technicians can compare it with the original bearing before ordering.\u003c\/p\u003e\u003csection data-seo-geo=\"quick-answer\"\u003e\u003ch2\u003eQuick Answer\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eHP-HS-N2\u003c\/strong\u003e is a 2.38×5×1.5 TL high-speed dental handpiece bearing measuring 2.38 × 5 × 1.5 mm (ID × OD × W). It uses 440C rings + Torlon polyimide cage + 440C steel balls and is rated above 400,000 RPM. Match the code, all three dimensions and construction details before ordering.\u003c\/p\u003e\u003c\/section\u003e\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eInternal SKU\u003c\/th\u003e\n\u003ctd\u003eHP-HS-N2\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eBearing code\u003c\/th\u003e\n\u003ctd\u003e2.38×5×1.5 TL\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eDimensions\u003c\/th\u003e\n\u003ctd\u003e2.38 × 5 × 1.5 mm (ID × OD × W)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eRated speed\u003c\/th\u003e\n\u003ctd\u003e\u0026gt; 400,000 RPM\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eMaterial\u003c\/th\u003e\n\u003ctd\u003e440C rings + Torlon polyimide cage + 440C steel balls\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eApplication\u003c\/th\u003e\n\u003ctd\u003eHigh-speed dental handpiece repair\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eNet weight\u003c\/th\u003e\n\u003ctd\u003e10 g\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003ePacked shipping weight\u003c\/th\u003e\n\u003ctd\u003e20 g\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\u003ch2\u003eBefore Ordering\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eMatch the bearing code and all three dimensions with the removed bearing.\u003c\/li\u003e\n\u003cli\u003eConfirm the ball and cage materials required for the repair.\u003c\/li\u003e\n\u003cli\u003eCheck shield, flange, groove and ring-width details where applicable.\u003c\/li\u003e\n\u003cli\u003eInstallation and functional testing should be completed by a qualified repair technician.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cdetails open\u003e\u003csummary\u003e\u003cstrong\u003eEnglish Bearing Code Reference\u003c\/strong\u003e\u003c\/summary\u003e\u003cp\u003eUse this table to read common high-speed handpiece bearing designations. The product-specific specifications above take priority whenever a code is not present or the construction differs.\u003c\/p\u003e\n\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth scope=\"col\"\u003eCode\u003c\/th\u003e\n\u003cth scope=\"col\"\u003eMeaning\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eS\u003c\/th\u003e\n\u003ctd\u003eMaterial-series prefix. Refer to the product-specific Material row above for the actual ring, cage and ball materials.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eF\u003c\/th\u003e\n\u003ctd\u003eThrust flange on the outer ring. With a 2.38 mm outer-ring width, the flange is 0.60 mm wide; with a 2.78 mm outer-ring width, it is 0.80 mm wide. For a grooved outer ring (G), the flange is 0.45 mm wide.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eBasic designation\u003c\/th\u003e\n\u003ctd\u003eThis SKU uses a dimension- or application-based designation. Confirm the listed dimensions: 2.38 × 5 × 1.5 mm (ID × OD × W).\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eK1 \/ K2\u003c\/th\u003e\n\u003ctd\u003eAngular-contact construction. K1 indicates a separable inner ring; K2 indicates a separable outer ring. Angular-contact versions use a one-piece cage.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eTA \/ TL \/ Ti\u003c\/th\u003e\n\u003ctd\u003eCage material. TA: yellow polyimide; TL: black polyimide (Torlon); Ti: fabric-reinforced phenolic.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eK \/ G\u003c\/th\u003e\n\u003ctd\u003eOuter-ring profile. K indicates a stepped outer diameter; G indicates a grooved outer diameter.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eZ \/ Z1\u003c\/th\u003e\n\u003ctd\u003eShield configuration. Z indicates a one-sided shield; Z1 indicates an integral one-sided shield.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eW \/ W02\u003c\/th\u003e\n\u003ctd\u003eWidth code. W means both rings are 2.78 mm wide. W02 means the outer ring is 2.38 mm and the inner ring is 2.78 mm. With no width code, both rings are 2.38 mm wide.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eN\u003c\/th\u003e\n\u003ctd\u003eBall material. N indicates Si3N4 silicon-nitride ceramic balls. With no N code, the balls are 9Cr18Mo \/ AISI 440C steel.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003c\/details\u003e\u003csection data-seo-geo=\"common-questions\"\u003e\u003ch2\u003eCommon Questions\u003c\/h2\u003e\n\u003ch3\u003eWhat is HP-HS-N2?\u003c\/h3\u003e\n\u003cp\u003eHP-HS-N2 is our internal reference for a 2.38×5×1.5 TL replacement bearing. Its listed size is 2.38 × 5 × 1.5 mm (ID × OD × W), with steel balls and a Torlon cage.\u003c\/p\u003e\n\u003ch3\u003eHow do I confirm that this bearing will fit?\u003c\/h3\u003e\n\u003cp\u003eCompare the bearing code and the inner diameter, outer diameter and width with the removed bearing. Then confirm any shield, flange, groove, cage and ball-material requirements. A qualified handpiece repair technician should make the final fitment decision.\u003c\/p\u003e\n\u003ch3\u003eIs this an OEM bearing?\u003c\/h3\u003e\n\u003cp\u003eNo. This is an independent third-party replacement bearing. Brand and model names, when mentioned, are used only to identify compatibility; no manufacturer affiliation or endorsement is claimed.\u003c\/p\u003e\u003c\/section\u003e\u003cnav data-related-links=\"products\" aria-label=\"Related resources\"\u003e\u003ch2\u003eRelated Resources\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"\/collections\/high-speed-handpiece-bearings\"\u003eBrowse all high-speed handpiece bearings\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/blogs\/repair-guides\"\u003eRead dental handpiece repair guides\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\u003c\/nav\u003e\u003cp\u003e\u003cstrong\u003eCompatibility notice:\u003c\/strong\u003e HP-HS-N2 is an internal reseller SKU. This is an independent third-party replacement bearing and is not manufactured, sponsored, authorized or endorsed by the handpiece manufacturer. Final fitment must be verified before installation.\u003c\/p\u003e","brand":"Handpiece Parts Hub","offers":[{"title":"Default Title","offer_id":64436785643889,"sku":"HP-HS-N2","price":5.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1033\/9893\/2849\/files\/HP-HS-N2.png?v=1787191451"},{"product_id":"hp-hs-n3-high-speed-dental-handpiece-bearing","title":"HP-HS-N3 High-Speed Bearing – S618-2.35TL – 2.35 × 5.5 × 2 mm","description":"\u003cp\u003e\u003cstrong\u003eHP-HS-N3\u003c\/strong\u003e is an independent replacement bearing for professional high-speed dental handpiece repair. It is supplied under our internal HP reference so technicians can compare it with the original bearing before ordering.\u003c\/p\u003e\u003csection data-seo-geo=\"quick-answer\"\u003e\u003ch2\u003eQuick Answer\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eHP-HS-N3\u003c\/strong\u003e is a S618-2.35TL high-speed dental handpiece bearing measuring 2.35 × 5.5 × 2 mm (ID × OD × W). It uses 440C rings + Torlon polyimide cage + 440C steel balls and is rated above 400,000 RPM. Match the code, all three dimensions and construction details before ordering.\u003c\/p\u003e\u003c\/section\u003e\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eInternal SKU\u003c\/th\u003e\n\u003ctd\u003eHP-HS-N3\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eBearing code\u003c\/th\u003e\n\u003ctd\u003eS618-2.35TL\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eDimensions\u003c\/th\u003e\n\u003ctd\u003e2.35 × 5.5 × 2 mm (ID × OD × W)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eRated speed\u003c\/th\u003e\n\u003ctd\u003e\u0026gt; 400,000 RPM\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eMaterial\u003c\/th\u003e\n\u003ctd\u003e440C rings + Torlon polyimide cage + 440C steel balls\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eApplication\u003c\/th\u003e\n\u003ctd\u003eHigh-speed dental handpiece repair\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eNet weight\u003c\/th\u003e\n\u003ctd\u003e10 g\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003ePacked shipping weight\u003c\/th\u003e\n\u003ctd\u003e20 g\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\u003ch2\u003eBefore Ordering\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eMatch the bearing code and all three dimensions with the removed bearing.\u003c\/li\u003e\n\u003cli\u003eConfirm the ball and cage materials required for the repair.\u003c\/li\u003e\n\u003cli\u003eCheck shield, flange, groove and ring-width details where applicable.\u003c\/li\u003e\n\u003cli\u003eInstallation and functional testing should be completed by a qualified repair technician.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cdetails open\u003e\u003csummary\u003e\u003cstrong\u003eEnglish Bearing Code Reference\u003c\/strong\u003e\u003c\/summary\u003e\u003cp\u003eUse this table to read common high-speed handpiece bearing designations. The product-specific specifications above take priority whenever a code is not present or the construction differs.\u003c\/p\u003e\n\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth scope=\"col\"\u003eCode\u003c\/th\u003e\n\u003cth scope=\"col\"\u003eMeaning\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eS\u003c\/th\u003e\n\u003ctd\u003eMaterial-series prefix. Refer to the product-specific Material row above for the actual ring, cage and ball materials.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eF\u003c\/th\u003e\n\u003ctd\u003eThrust flange on the outer ring. With a 2.38 mm outer-ring width, the flange is 0.60 mm wide; with a 2.78 mm outer-ring width, it is 0.80 mm wide. For a grooved outer ring (G), the flange is 0.45 mm wide.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003e618-2.35\u003c\/th\u003e\n\u003ctd\u003e618-2.35 is the basic series used in this designation. The listed dimensions for this SKU are 2.35 × 5.5 × 2 mm (ID × OD × W).\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eK1 \/ K2\u003c\/th\u003e\n\u003ctd\u003eAngular-contact construction. K1 indicates a separable inner ring; K2 indicates a separable outer ring. Angular-contact versions use a one-piece cage.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eTA \/ TL \/ Ti\u003c\/th\u003e\n\u003ctd\u003eCage material. TA: yellow polyimide; TL: black polyimide (Torlon); Ti: fabric-reinforced phenolic.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eK \/ G\u003c\/th\u003e\n\u003ctd\u003eOuter-ring profile. K indicates a stepped outer diameter; G indicates a grooved outer diameter.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eZ \/ Z1\u003c\/th\u003e\n\u003ctd\u003eShield configuration. Z indicates a one-sided shield; Z1 indicates an integral one-sided shield.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eW \/ W02\u003c\/th\u003e\n\u003ctd\u003eWidth code. W means both rings are 2.78 mm wide. W02 means the outer ring is 2.38 mm and the inner ring is 2.78 mm. With no width code, both rings are 2.38 mm wide.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eN\u003c\/th\u003e\n\u003ctd\u003eBall material. N indicates Si3N4 silicon-nitride ceramic balls. With no N code, the balls are 9Cr18Mo \/ AISI 440C steel.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003c\/details\u003e\u003csection data-seo-geo=\"common-questions\"\u003e\u003ch2\u003eCommon Questions\u003c\/h2\u003e\n\u003ch3\u003eWhat is HP-HS-N3?\u003c\/h3\u003e\n\u003cp\u003eHP-HS-N3 is our internal reference for a S618-2.35TL replacement bearing. Its listed size is 2.35 × 5.5 × 2 mm (ID × OD × W), with steel balls and a Torlon cage.\u003c\/p\u003e\n\u003ch3\u003eHow do I confirm that this bearing will fit?\u003c\/h3\u003e\n\u003cp\u003eCompare the bearing code and the inner diameter, outer diameter and width with the removed bearing. Then confirm any shield, flange, groove, cage and ball-material requirements. A qualified handpiece repair technician should make the final fitment decision.\u003c\/p\u003e\n\u003ch3\u003eIs this an OEM bearing?\u003c\/h3\u003e\n\u003cp\u003eNo. This is an independent third-party replacement bearing. Brand and model names, when mentioned, are used only to identify compatibility; no manufacturer affiliation or endorsement is claimed.\u003c\/p\u003e\u003c\/section\u003e\u003cnav data-related-links=\"products\" aria-label=\"Related resources\"\u003e\u003ch2\u003eRelated Resources\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"\/collections\/high-speed-handpiece-bearings\"\u003eBrowse all high-speed handpiece bearings\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/blogs\/repair-guides\"\u003eRead dental handpiece repair guides\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\u003c\/nav\u003e\u003cp\u003e\u003cstrong\u003eCompatibility notice:\u003c\/strong\u003e HP-HS-N3 is an internal reseller SKU. This is an independent third-party replacement bearing and is not manufactured, sponsored, authorized or endorsed by the handpiece manufacturer. Final fitment must be verified before installation.\u003c\/p\u003e","brand":"Handpiece Parts Hub","offers":[{"title":"Default Title","offer_id":64436785676657,"sku":"HP-HS-N3","price":5.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1033\/9893\/2849\/files\/HP-HS-N3.png?v=1787191451"},{"product_id":"hp-hs-n4-high-speed-dental-handpiece-bearing","title":"HP-HS-N4 High-Speed Bearing – 2.38×6.35×2.78 TL – 2.38 × 6.35 × 2.78 mm","description":"\u003cp\u003e\u003cstrong\u003eHP-HS-N4\u003c\/strong\u003e is an independent replacement bearing for professional high-speed dental handpiece repair. It is supplied under our internal HP reference so technicians can compare it with the original bearing before ordering.\u003c\/p\u003e\u003csection data-seo-geo=\"quick-answer\"\u003e\u003ch2\u003eQuick Answer\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eHP-HS-N4\u003c\/strong\u003e is a 2.38×6.35×2.78 TL high-speed dental handpiece bearing measuring 2.38 × 6.35 × 2.78 mm (ID × OD × W). It uses 440C rings + Torlon polyimide cage + 440C steel balls and is rated above 400,000 RPM. Match the code, all three dimensions and construction details before ordering.\u003c\/p\u003e\u003c\/section\u003e\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eInternal SKU\u003c\/th\u003e\n\u003ctd\u003eHP-HS-N4\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eBearing code\u003c\/th\u003e\n\u003ctd\u003e2.38×6.35×2.78 TL\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eDimensions\u003c\/th\u003e\n\u003ctd\u003e2.38 × 6.35 × 2.78 mm (ID × OD × W)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eRated speed\u003c\/th\u003e\n\u003ctd\u003e\u0026gt; 400,000 RPM\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eMaterial\u003c\/th\u003e\n\u003ctd\u003e440C rings + Torlon polyimide cage + 440C steel balls\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eApplication\u003c\/th\u003e\n\u003ctd\u003eHigh-speed dental handpiece repair\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eNet weight\u003c\/th\u003e\n\u003ctd\u003e10 g\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003ePacked shipping weight\u003c\/th\u003e\n\u003ctd\u003e20 g\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\u003ch2\u003eBefore Ordering\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eMatch the bearing code and all three dimensions with the removed bearing.\u003c\/li\u003e\n\u003cli\u003eConfirm the ball and cage materials required for the repair.\u003c\/li\u003e\n\u003cli\u003eCheck shield, flange, groove and ring-width details where applicable.\u003c\/li\u003e\n\u003cli\u003eInstallation and functional testing should be completed by a qualified repair technician.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cdetails open\u003e\u003csummary\u003e\u003cstrong\u003eEnglish Bearing Code Reference\u003c\/strong\u003e\u003c\/summary\u003e\u003cp\u003eUse this table to read common high-speed handpiece bearing designations. The product-specific specifications above take priority whenever a code is not present or the construction differs.\u003c\/p\u003e\n\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth scope=\"col\"\u003eCode\u003c\/th\u003e\n\u003cth scope=\"col\"\u003eMeaning\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eS\u003c\/th\u003e\n\u003ctd\u003eMaterial-series prefix. Refer to the product-specific Material row above for the actual ring, cage and ball materials.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eF\u003c\/th\u003e\n\u003ctd\u003eThrust flange on the outer ring. With a 2.38 mm outer-ring width, the flange is 0.60 mm wide; with a 2.78 mm outer-ring width, it is 0.80 mm wide. For a grooved outer ring (G), the flange is 0.45 mm wide.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eBasic designation\u003c\/th\u003e\n\u003ctd\u003eThis SKU uses a dimension- or application-based designation. Confirm the listed dimensions: 2.38 × 6.35 × 2.78 mm (ID × OD × W).\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eK1 \/ K2\u003c\/th\u003e\n\u003ctd\u003eAngular-contact construction. K1 indicates a separable inner ring; K2 indicates a separable outer ring. Angular-contact versions use a one-piece cage.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eTA \/ TL \/ Ti\u003c\/th\u003e\n\u003ctd\u003eCage material. TA: yellow polyimide; TL: black polyimide (Torlon); Ti: fabric-reinforced phenolic.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eK \/ G\u003c\/th\u003e\n\u003ctd\u003eOuter-ring profile. K indicates a stepped outer diameter; G indicates a grooved outer diameter.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eZ \/ Z1\u003c\/th\u003e\n\u003ctd\u003eShield configuration. Z indicates a one-sided shield; Z1 indicates an integral one-sided shield.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eW \/ W02\u003c\/th\u003e\n\u003ctd\u003eWidth code. W means both rings are 2.78 mm wide. W02 means the outer ring is 2.38 mm and the inner ring is 2.78 mm. With no width code, both rings are 2.38 mm wide.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eN\u003c\/th\u003e\n\u003ctd\u003eBall material. N indicates Si3N4 silicon-nitride ceramic balls. With no N code, the balls are 9Cr18Mo \/ AISI 440C steel.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003c\/details\u003e\u003csection data-seo-geo=\"common-questions\"\u003e\u003ch2\u003eCommon Questions\u003c\/h2\u003e\n\u003ch3\u003eWhat is HP-HS-N4?\u003c\/h3\u003e\n\u003cp\u003eHP-HS-N4 is our internal reference for a 2.38×6.35×2.78 TL replacement bearing. Its listed size is 2.38 × 6.35 × 2.78 mm (ID × OD × W), with steel balls and a Torlon cage.\u003c\/p\u003e\n\u003ch3\u003eHow do I confirm that this bearing will fit?\u003c\/h3\u003e\n\u003cp\u003eCompare the bearing code and the inner diameter, outer diameter and width with the removed bearing. Then confirm any shield, flange, groove, cage and ball-material requirements. A qualified handpiece repair technician should make the final fitment decision.\u003c\/p\u003e\n\u003ch3\u003eIs this an OEM bearing?\u003c\/h3\u003e\n\u003cp\u003eNo. This is an independent third-party replacement bearing. Brand and model names, when mentioned, are used only to identify compatibility; no manufacturer affiliation or endorsement is claimed.\u003c\/p\u003e\u003c\/section\u003e\u003cnav data-related-links=\"products\" aria-label=\"Related resources\"\u003e\u003ch2\u003eRelated Resources\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"\/collections\/high-speed-handpiece-bearings\"\u003eBrowse all high-speed handpiece bearings\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/blogs\/repair-guides\"\u003eRead dental handpiece repair guides\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\u003c\/nav\u003e\u003cp\u003e\u003cstrong\u003eCompatibility notice:\u003c\/strong\u003e HP-HS-N4 is an internal reseller SKU. This is an independent third-party replacement bearing and is not manufactured, sponsored, authorized or endorsed by the handpiece manufacturer. Final fitment must be verified before installation.\u003c\/p\u003e","brand":"Handpiece Parts Hub","offers":[{"title":"Default Title","offer_id":64436785709425,"sku":"HP-HS-N4","price":7.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1033\/9893\/2849\/files\/HP-HS-N4.png?v=1787191451"},{"product_id":"hp-hs-p1-high-speed-dental-handpiece-bearing","title":"HP-HS-P1 High-Speed Bearing – S617TLZN – 3.48 × 7 × 2.48 mm","description":"\u003cp\u003e\u003cstrong\u003eHP-HS-P1\u003c\/strong\u003e is an independent replacement bearing for professional high-speed dental handpiece repair. It is supplied under our internal HP reference so technicians can compare it with the original bearing before ordering.\u003c\/p\u003e\u003csection data-seo-geo=\"quick-answer\"\u003e\u003ch2\u003eQuick Answer\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eHP-HS-P1\u003c\/strong\u003e is a S617TLZN high-speed dental handpiece bearing measuring 3.48 × 7 × 2.48 mm (ID × OD × W). It uses 440C rings + Torlon polyimide cage + Si3N4 ceramic balls and is rated above 400,000 RPM. Match the code, all three dimensions and construction details before ordering.\u003c\/p\u003e\u003c\/section\u003e\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eInternal SKU\u003c\/th\u003e\n\u003ctd\u003eHP-HS-P1\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eBearing code\u003c\/th\u003e\n\u003ctd\u003eS617TLZN\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eDimensions\u003c\/th\u003e\n\u003ctd\u003e3.48 × 7 × 2.48 mm (ID × OD × W)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eRated speed\u003c\/th\u003e\n\u003ctd\u003e\u0026gt; 400,000 RPM\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eMaterial\u003c\/th\u003e\n\u003ctd\u003e440C rings + Torlon polyimide cage + Si3N4 ceramic balls\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eApplication\u003c\/th\u003e\n\u003ctd\u003eHigh-speed dental handpiece repair\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eNet weight\u003c\/th\u003e\n\u003ctd\u003e10 g\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003ePacked shipping weight\u003c\/th\u003e\n\u003ctd\u003e20 g\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\u003ch2\u003eBefore Ordering\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eMatch the bearing code and all three dimensions with the removed bearing.\u003c\/li\u003e\n\u003cli\u003eConfirm the ball and cage materials required for the repair.\u003c\/li\u003e\n\u003cli\u003eCheck shield, flange, groove and ring-width details where applicable.\u003c\/li\u003e\n\u003cli\u003eInstallation and functional testing should be completed by a qualified repair technician.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cdetails open\u003e\u003csummary\u003e\u003cstrong\u003eEnglish Bearing Code Reference\u003c\/strong\u003e\u003c\/summary\u003e\u003cp\u003eUse this table to read common high-speed handpiece bearing designations. The product-specific specifications above take priority whenever a code is not present or the construction differs.\u003c\/p\u003e\n\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth scope=\"col\"\u003eCode\u003c\/th\u003e\n\u003cth scope=\"col\"\u003eMeaning\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eS\u003c\/th\u003e\n\u003ctd\u003eMaterial-series prefix. Refer to the product-specific Material row above for the actual ring, cage and ball materials.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eF\u003c\/th\u003e\n\u003ctd\u003eThrust flange on the outer ring. With a 2.38 mm outer-ring width, the flange is 0.60 mm wide; with a 2.78 mm outer-ring width, it is 0.80 mm wide. For a grooved outer ring (G), the flange is 0.45 mm wide.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003e617\u003c\/th\u003e\n\u003ctd\u003e617 is the basic series used in this designation. The listed dimensions for this SKU are 3.48 × 7 × 2.48 mm (ID × OD × W).\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eK1 \/ K2\u003c\/th\u003e\n\u003ctd\u003eAngular-contact construction. K1 indicates a separable inner ring; K2 indicates a separable outer ring. Angular-contact versions use a one-piece cage.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eTA \/ TL \/ Ti\u003c\/th\u003e\n\u003ctd\u003eCage material. TA: yellow polyimide; TL: black polyimide (Torlon); Ti: fabric-reinforced phenolic.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eK \/ G\u003c\/th\u003e\n\u003ctd\u003eOuter-ring profile. K indicates a stepped outer diameter; G indicates a grooved outer diameter.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eZ \/ Z1\u003c\/th\u003e\n\u003ctd\u003eShield configuration. Z indicates a one-sided shield; Z1 indicates an integral one-sided shield.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eW \/ W02\u003c\/th\u003e\n\u003ctd\u003eWidth code. W means both rings are 2.78 mm wide. W02 means the outer ring is 2.38 mm and the inner ring is 2.78 mm. With no width code, both rings are 2.38 mm wide.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eN\u003c\/th\u003e\n\u003ctd\u003eBall material. N indicates Si3N4 silicon-nitride ceramic balls. With no N code, the balls are 9Cr18Mo \/ AISI 440C steel.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003c\/details\u003e\u003csection data-seo-geo=\"common-questions\"\u003e\u003ch2\u003eCommon Questions\u003c\/h2\u003e\n\u003ch3\u003eWhat is HP-HS-P1?\u003c\/h3\u003e\n\u003cp\u003eHP-HS-P1 is our internal reference for a S617TLZN replacement bearing. Its listed size is 3.48 × 7 × 2.48 mm (ID × OD × W), with ceramic balls and a Torlon cage.\u003c\/p\u003e\n\u003ch3\u003eHow do I confirm that this bearing will fit?\u003c\/h3\u003e\n\u003cp\u003eCompare the bearing code and the inner diameter, outer diameter and width with the removed bearing. Then confirm any shield, flange, groove, cage and ball-material requirements. A qualified handpiece repair technician should make the final fitment decision.\u003c\/p\u003e\n\u003ch3\u003eIs this an OEM bearing?\u003c\/h3\u003e\n\u003cp\u003eNo. This is an independent third-party replacement bearing. Brand and model names, when mentioned, are used only to identify compatibility; no manufacturer affiliation or endorsement is claimed.\u003c\/p\u003e\u003c\/section\u003e\u003cnav data-related-links=\"products\" aria-label=\"Related resources\"\u003e\u003ch2\u003eRelated Resources\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"\/collections\/high-speed-handpiece-bearings\"\u003eBrowse all high-speed handpiece bearings\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/blogs\/repair-guides\"\u003eRead dental handpiece repair guides\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\u003c\/nav\u003e\u003cp\u003e\u003cstrong\u003eCompatibility notice:\u003c\/strong\u003e HP-HS-P1 is an internal reseller SKU. This is an independent third-party replacement bearing and is not manufactured, sponsored, authorized or endorsed by the handpiece manufacturer. Final fitment must be verified before installation.\u003c\/p\u003e","brand":"Handpiece Parts Hub","offers":[{"title":"Default Title","offer_id":64436785742193,"sku":"HP-HS-P1","price":6.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1033\/9893\/2849\/files\/HP-HS-P1.png?v=1787191451"},{"product_id":"hp-hs-r1-high-speed-dental-handpiece-bearing","title":"HP-HS-R1 High-Speed Bearing – SR144TLZWO2N – 3.175 × 6.35 × 2.38 mm","description":"\u003cp\u003e\u003cstrong\u003eHP-HS-R1\u003c\/strong\u003e is an independent replacement bearing for professional high-speed dental handpiece repair. It is supplied under our internal HP reference so technicians can compare it with the original bearing before ordering.\u003c\/p\u003e\u003csection data-seo-geo=\"quick-answer\"\u003e\u003ch2\u003eQuick Answer\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eHP-HS-R1\u003c\/strong\u003e is a SR144TLZWO2N high-speed dental handpiece bearing measuring 3.175 × 6.35 × 2.38 mm (ID × OD × W). It uses 440C rings + Torlon polyimide cage + Si3N4 ceramic balls and is rated above 400,000 RPM. Match the code, all three dimensions and construction details before ordering.\u003c\/p\u003e\u003c\/section\u003e\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eInternal SKU\u003c\/th\u003e\n\u003ctd\u003eHP-HS-R1\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eBearing code\u003c\/th\u003e\n\u003ctd\u003eSR144TLZWO2N\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eDimensions\u003c\/th\u003e\n\u003ctd\u003e3.175 × 6.35 × 2.38 mm (ID × OD × W)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eRated speed\u003c\/th\u003e\n\u003ctd\u003e\u0026gt; 400,000 RPM\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eMaterial\u003c\/th\u003e\n\u003ctd\u003e440C rings + Torlon polyimide cage + Si3N4 ceramic balls\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eApplication\u003c\/th\u003e\n\u003ctd\u003eHigh-speed dental handpiece repair\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eNet weight\u003c\/th\u003e\n\u003ctd\u003e10 g\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003ePacked shipping weight\u003c\/th\u003e\n\u003ctd\u003e20 g\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\u003ch2\u003eBefore Ordering\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eMatch the bearing code and all three dimensions with the removed bearing.\u003c\/li\u003e\n\u003cli\u003eConfirm the ball and cage materials required for the repair.\u003c\/li\u003e\n\u003cli\u003eCheck shield, flange, groove and ring-width details where applicable.\u003c\/li\u003e\n\u003cli\u003eInstallation and functional testing should be completed by a qualified repair technician.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cdetails open\u003e\u003csummary\u003e\u003cstrong\u003eEnglish Bearing Code Reference\u003c\/strong\u003e\u003c\/summary\u003e\u003cp\u003eUse this table to read common high-speed handpiece bearing designations. The product-specific specifications above take priority whenever a code is not present or the construction differs.\u003c\/p\u003e\n\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth scope=\"col\"\u003eCode\u003c\/th\u003e\n\u003cth scope=\"col\"\u003eMeaning\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eS\u003c\/th\u003e\n\u003ctd\u003eMaterial-series prefix. Refer to the product-specific Material row above for the actual ring, cage and ball materials.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eF\u003c\/th\u003e\n\u003ctd\u003eThrust flange on the outer ring. With a 2.38 mm outer-ring width, the flange is 0.60 mm wide; with a 2.78 mm outer-ring width, it is 0.80 mm wide. For a grooved outer ring (G), the flange is 0.45 mm wide.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eR144\u003c\/th\u003e\n\u003ctd\u003eR144 is the basic series used in this designation. The listed dimensions for this SKU are 3.175 × 6.35 × 2.38 mm (ID × OD × W).\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eK1 \/ K2\u003c\/th\u003e\n\u003ctd\u003eAngular-contact construction. K1 indicates a separable inner ring; K2 indicates a separable outer ring. Angular-contact versions use a one-piece cage.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eTA \/ TL \/ Ti\u003c\/th\u003e\n\u003ctd\u003eCage material. TA: yellow polyimide; TL: black polyimide (Torlon); Ti: fabric-reinforced phenolic.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eK \/ G\u003c\/th\u003e\n\u003ctd\u003eOuter-ring profile. K indicates a stepped outer diameter; G indicates a grooved outer diameter.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eZ \/ Z1\u003c\/th\u003e\n\u003ctd\u003eShield configuration. Z indicates a one-sided shield; Z1 indicates an integral one-sided shield.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eW \/ W02\u003c\/th\u003e\n\u003ctd\u003eWidth code. W means both rings are 2.78 mm wide. W02 means the outer ring is 2.38 mm and the inner ring is 2.78 mm. With no width code, both rings are 2.38 mm wide.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eN\u003c\/th\u003e\n\u003ctd\u003eBall material. N indicates Si3N4 silicon-nitride ceramic balls. With no N code, the balls are 9Cr18Mo \/ AISI 440C steel.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003c\/details\u003e\u003csection data-seo-geo=\"common-questions\"\u003e\u003ch2\u003eCommon Questions\u003c\/h2\u003e\n\u003ch3\u003eWhat is HP-HS-R1?\u003c\/h3\u003e\n\u003cp\u003eHP-HS-R1 is our internal reference for a SR144TLZWO2N replacement bearing. Its listed size is 3.175 × 6.35 × 2.38 mm (ID × OD × W), with ceramic balls and a Torlon cage.\u003c\/p\u003e\n\u003ch3\u003eHow do I confirm that this bearing will fit?\u003c\/h3\u003e\n\u003cp\u003eCompare the bearing code and the inner diameter, outer diameter and width with the removed bearing. Then confirm any shield, flange, groove, cage and ball-material requirements. A qualified handpiece repair technician should make the final fitment decision.\u003c\/p\u003e\n\u003ch3\u003eIs this an OEM bearing?\u003c\/h3\u003e\n\u003cp\u003eNo. This is an independent third-party replacement bearing. Brand and model names, when mentioned, are used only to identify compatibility; no manufacturer affiliation or endorsement is claimed.\u003c\/p\u003e\u003c\/section\u003e\u003cnav data-related-links=\"products\" aria-label=\"Related resources\"\u003e\u003ch2\u003eRelated Resources\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"\/collections\/high-speed-handpiece-bearings\"\u003eBrowse all high-speed handpiece bearings\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/blogs\/repair-guides\"\u003eRead dental handpiece repair guides\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\u003c\/nav\u003e\u003cp\u003e\u003cstrong\u003eCompatibility notice:\u003c\/strong\u003e HP-HS-R1 is an internal reseller SKU. This is an independent third-party replacement bearing and is not manufactured, sponsored, authorized or endorsed by the handpiece manufacturer. Final fitment must be verified before installation.\u003c\/p\u003e","brand":"Handpiece Parts Hub","offers":[{"title":"Default Title","offer_id":64436785774961,"sku":"HP-HS-R1","price":6.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1033\/9893\/2849\/files\/HP-HS-R1.png?v=1787191451"},{"product_id":"hp-hs-s1-high-speed-dental-handpiece-bearing","title":"HP-HS-S1 High-Speed Bearing – 3.175×6×2 TL – 3.175 × 6 × 2 mm","description":"\u003cp\u003e\u003cstrong\u003eHP-HS-S1\u003c\/strong\u003e is an independent replacement bearing for professional high-speed dental handpiece repair. It is supplied under our internal HP reference so technicians can compare it with the original bearing before ordering.\u003c\/p\u003e\u003csection data-seo-geo=\"quick-answer\"\u003e\u003ch2\u003eQuick Answer\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eHP-HS-S1\u003c\/strong\u003e is a 3.175×6×2 TL high-speed dental handpiece bearing measuring 3.175 × 6 × 2 mm (ID × OD × W). It uses 440C rings + Torlon polyimide cage + 440C steel balls and is rated above 400,000 RPM. Match the code, all three dimensions and construction details before ordering.\u003c\/p\u003e\u003c\/section\u003e\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eInternal SKU\u003c\/th\u003e\n\u003ctd\u003eHP-HS-S1\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eBearing code\u003c\/th\u003e\n\u003ctd\u003e3.175×6×2 TL\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eDimensions\u003c\/th\u003e\n\u003ctd\u003e3.175 × 6 × 2 mm (ID × OD × W)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eRated speed\u003c\/th\u003e\n\u003ctd\u003e\u0026gt; 400,000 RPM\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eMaterial\u003c\/th\u003e\n\u003ctd\u003e440C rings + Torlon polyimide cage + 440C steel balls\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eApplication\u003c\/th\u003e\n\u003ctd\u003eHigh-speed dental handpiece repair\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eNet weight\u003c\/th\u003e\n\u003ctd\u003e10 g\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003ePacked shipping weight\u003c\/th\u003e\n\u003ctd\u003e20 g\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\u003ch2\u003eBefore Ordering\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eMatch the bearing code and all three dimensions with the removed bearing.\u003c\/li\u003e\n\u003cli\u003eConfirm the ball and cage materials required for the repair.\u003c\/li\u003e\n\u003cli\u003eCheck shield, flange, groove and ring-width details where applicable.\u003c\/li\u003e\n\u003cli\u003eInstallation and functional testing should be completed by a qualified repair technician.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cdetails open\u003e\u003csummary\u003e\u003cstrong\u003eEnglish Bearing Code Reference\u003c\/strong\u003e\u003c\/summary\u003e\u003cp\u003eUse this table to read common high-speed handpiece bearing designations. The product-specific specifications above take priority whenever a code is not present or the construction differs.\u003c\/p\u003e\n\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth scope=\"col\"\u003eCode\u003c\/th\u003e\n\u003cth scope=\"col\"\u003eMeaning\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eS\u003c\/th\u003e\n\u003ctd\u003eMaterial-series prefix. Refer to the product-specific Material row above for the actual ring, cage and ball materials.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eF\u003c\/th\u003e\n\u003ctd\u003eThrust flange on the outer ring. With a 2.38 mm outer-ring width, the flange is 0.60 mm wide; with a 2.78 mm outer-ring width, it is 0.80 mm wide. For a grooved outer ring (G), the flange is 0.45 mm wide.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eBasic designation\u003c\/th\u003e\n\u003ctd\u003eThis SKU uses a dimension- or application-based designation. Confirm the listed dimensions: 3.175 × 6 × 2 mm (ID × OD × W).\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eK1 \/ K2\u003c\/th\u003e\n\u003ctd\u003eAngular-contact construction. K1 indicates a separable inner ring; K2 indicates a separable outer ring. Angular-contact versions use a one-piece cage.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eTA \/ TL \/ Ti\u003c\/th\u003e\n\u003ctd\u003eCage material. TA: yellow polyimide; TL: black polyimide (Torlon); Ti: fabric-reinforced phenolic.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eK \/ G\u003c\/th\u003e\n\u003ctd\u003eOuter-ring profile. K indicates a stepped outer diameter; G indicates a grooved outer diameter.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eZ \/ Z1\u003c\/th\u003e\n\u003ctd\u003eShield configuration. Z indicates a one-sided shield; Z1 indicates an integral one-sided shield.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eW \/ W02\u003c\/th\u003e\n\u003ctd\u003eWidth code. W means both rings are 2.78 mm wide. W02 means the outer ring is 2.38 mm and the inner ring is 2.78 mm. With no width code, both rings are 2.38 mm wide.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eN\u003c\/th\u003e\n\u003ctd\u003eBall material. N indicates Si3N4 silicon-nitride ceramic balls. With no N code, the balls are 9Cr18Mo \/ AISI 440C steel.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003c\/details\u003e\u003csection data-seo-geo=\"common-questions\"\u003e\u003ch2\u003eCommon Questions\u003c\/h2\u003e\n\u003ch3\u003eWhat is HP-HS-S1?\u003c\/h3\u003e\n\u003cp\u003eHP-HS-S1 is our internal reference for a 3.175×6×2 TL replacement bearing. Its listed size is 3.175 × 6 × 2 mm (ID × OD × W), with steel balls and a Torlon cage.\u003c\/p\u003e\n\u003ch3\u003eHow do I confirm that this bearing will fit?\u003c\/h3\u003e\n\u003cp\u003eCompare the bearing code and the inner diameter, outer diameter and width with the removed bearing. Then confirm any shield, flange, groove, cage and ball-material requirements. A qualified handpiece repair technician should make the final fitment decision.\u003c\/p\u003e\n\u003ch3\u003eIs this an OEM bearing?\u003c\/h3\u003e\n\u003cp\u003eNo. This is an independent third-party replacement bearing. Brand and model names, when mentioned, are used only to identify compatibility; no manufacturer affiliation or endorsement is claimed.\u003c\/p\u003e\u003c\/section\u003e\u003cnav data-related-links=\"products\" aria-label=\"Related resources\"\u003e\u003ch2\u003eRelated Resources\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"\/collections\/high-speed-handpiece-bearings\"\u003eBrowse all high-speed handpiece bearings\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/blogs\/repair-guides\"\u003eRead dental handpiece repair guides\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\u003c\/nav\u003e\u003cp\u003e\u003cstrong\u003eCompatibility notice:\u003c\/strong\u003e HP-HS-S1 is an internal reseller SKU. This is an independent third-party replacement bearing and is not manufactured, sponsored, authorized or endorsed by the handpiece manufacturer. Final fitment must be verified before installation.\u003c\/p\u003e","brand":"Handpiece Parts Hub","offers":[{"title":"Default Title","offer_id":64436785807729,"sku":"HP-HS-S1","price":6.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1033\/9893\/2849\/files\/HP-HS-S1.png?v=1787191451"},{"product_id":"hp-hs-s2-high-speed-dental-handpiece-bearing","title":"HP-HS-S2 High-Speed Bearing – 3.175×7×2 TL – 3.175 × 7 × 2 mm","description":"\u003cp\u003e\u003cstrong\u003eHP-HS-S2\u003c\/strong\u003e is an independent replacement bearing for professional high-speed dental handpiece repair. It is supplied under our internal HP reference so technicians can compare it with the original bearing before ordering.\u003c\/p\u003e\u003csection data-seo-geo=\"quick-answer\"\u003e\u003ch2\u003eQuick Answer\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eHP-HS-S2\u003c\/strong\u003e is a 3.175×7×2 TL high-speed dental handpiece bearing measuring 3.175 × 7 × 2 mm (ID × OD × W). It uses 440C rings + Torlon polyimide cage + 440C steel balls and is rated above 400,000 RPM. Match the code, all three dimensions and construction details before ordering.\u003c\/p\u003e\u003c\/section\u003e\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eInternal SKU\u003c\/th\u003e\n\u003ctd\u003eHP-HS-S2\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eBearing code\u003c\/th\u003e\n\u003ctd\u003e3.175×7×2 TL\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eDimensions\u003c\/th\u003e\n\u003ctd\u003e3.175 × 7 × 2 mm (ID × OD × W)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eRated speed\u003c\/th\u003e\n\u003ctd\u003e\u0026gt; 400,000 RPM\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eMaterial\u003c\/th\u003e\n\u003ctd\u003e440C rings + Torlon polyimide cage + 440C steel balls\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eApplication\u003c\/th\u003e\n\u003ctd\u003eHigh-speed dental handpiece repair\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eNet weight\u003c\/th\u003e\n\u003ctd\u003e10 g\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003ePacked shipping weight\u003c\/th\u003e\n\u003ctd\u003e20 g\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\u003ch2\u003eBefore Ordering\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eMatch the bearing code and all three dimensions with the removed bearing.\u003c\/li\u003e\n\u003cli\u003eConfirm the ball and cage materials required for the repair.\u003c\/li\u003e\n\u003cli\u003eCheck shield, flange, groove and ring-width details where applicable.\u003c\/li\u003e\n\u003cli\u003eInstallation and functional testing should be completed by a qualified repair technician.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cdetails open\u003e\u003csummary\u003e\u003cstrong\u003eEnglish Bearing Code Reference\u003c\/strong\u003e\u003c\/summary\u003e\u003cp\u003eUse this table to read common high-speed handpiece bearing designations. The product-specific specifications above take priority whenever a code is not present or the construction differs.\u003c\/p\u003e\n\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth scope=\"col\"\u003eCode\u003c\/th\u003e\n\u003cth scope=\"col\"\u003eMeaning\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eS\u003c\/th\u003e\n\u003ctd\u003eMaterial-series prefix. Refer to the product-specific Material row above for the actual ring, cage and ball materials.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eF\u003c\/th\u003e\n\u003ctd\u003eThrust flange on the outer ring. With a 2.38 mm outer-ring width, the flange is 0.60 mm wide; with a 2.78 mm outer-ring width, it is 0.80 mm wide. For a grooved outer ring (G), the flange is 0.45 mm wide.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eBasic designation\u003c\/th\u003e\n\u003ctd\u003eThis SKU uses a dimension- or application-based designation. Confirm the listed dimensions: 3.175 × 7 × 2 mm (ID × OD × W).\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eK1 \/ K2\u003c\/th\u003e\n\u003ctd\u003eAngular-contact construction. K1 indicates a separable inner ring; K2 indicates a separable outer ring. Angular-contact versions use a one-piece cage.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eTA \/ TL \/ Ti\u003c\/th\u003e\n\u003ctd\u003eCage material. TA: yellow polyimide; TL: black polyimide (Torlon); Ti: fabric-reinforced phenolic.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eK \/ G\u003c\/th\u003e\n\u003ctd\u003eOuter-ring profile. K indicates a stepped outer diameter; G indicates a grooved outer diameter.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eZ \/ Z1\u003c\/th\u003e\n\u003ctd\u003eShield configuration. Z indicates a one-sided shield; Z1 indicates an integral one-sided shield.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eW \/ W02\u003c\/th\u003e\n\u003ctd\u003eWidth code. W means both rings are 2.78 mm wide. W02 means the outer ring is 2.38 mm and the inner ring is 2.78 mm. With no width code, both rings are 2.38 mm wide.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eN\u003c\/th\u003e\n\u003ctd\u003eBall material. N indicates Si3N4 silicon-nitride ceramic balls. With no N code, the balls are 9Cr18Mo \/ AISI 440C steel.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003c\/details\u003e\u003csection data-seo-geo=\"common-questions\"\u003e\u003ch2\u003eCommon Questions\u003c\/h2\u003e\n\u003ch3\u003eWhat is HP-HS-S2?\u003c\/h3\u003e\n\u003cp\u003eHP-HS-S2 is our internal reference for a 3.175×7×2 TL replacement bearing. Its listed size is 3.175 × 7 × 2 mm (ID × OD × W), with steel balls and a Torlon cage.\u003c\/p\u003e\n\u003ch3\u003eHow do I confirm that this bearing will fit?\u003c\/h3\u003e\n\u003cp\u003eCompare the bearing code and the inner diameter, outer diameter and width with the removed bearing. Then confirm any shield, flange, groove, cage and ball-material requirements. A qualified handpiece repair technician should make the final fitment decision.\u003c\/p\u003e\n\u003ch3\u003eIs this an OEM bearing?\u003c\/h3\u003e\n\u003cp\u003eNo. This is an independent third-party replacement bearing. Brand and model names, when mentioned, are used only to identify compatibility; no manufacturer affiliation or endorsement is claimed.\u003c\/p\u003e\u003c\/section\u003e\u003cnav data-related-links=\"products\" aria-label=\"Related resources\"\u003e\u003ch2\u003eRelated Resources\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"\/collections\/high-speed-handpiece-bearings\"\u003eBrowse all high-speed handpiece bearings\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/blogs\/repair-guides\"\u003eRead dental handpiece repair guides\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\u003c\/nav\u003e\u003cp\u003e\u003cstrong\u003eCompatibility notice:\u003c\/strong\u003e HP-HS-S2 is an internal reseller SKU. This is an independent third-party replacement bearing and is not manufactured, sponsored, authorized or endorsed by the handpiece manufacturer. Final fitment must be verified before installation.\u003c\/p\u003e","brand":"Handpiece Parts Hub","offers":[{"title":"Default Title","offer_id":64436785840497,"sku":"HP-HS-S2","price":6.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1033\/9893\/2849\/files\/HP-HS-S2.png?v=1787191451"},{"product_id":"hp-hs-x1-high-speed-dental-handpiece-bearing","title":"HP-HS-X1 High-Speed Bearing – Sirona mini Boost – 3.175 × 6.35 × 2.38 mm","description":"\u003cp\u003e\u003cstrong\u003eHP-HS-X1\u003c\/strong\u003e is an independent replacement bearing for professional high-speed dental handpiece repair. It is supplied under our internal HP reference so technicians can compare it with the original bearing before ordering.\u003c\/p\u003e\u003csection data-seo-geo=\"quick-answer\"\u003e\u003ch2\u003eQuick Answer\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eHP-HS-X1\u003c\/strong\u003e is a Sirona mini Boost high-speed dental handpiece bearing measuring 3.175 × 6.35 × 2.38 mm (ID × OD × W). It uses 440C rings + Torlon polyimide cage + Si3N4 ceramic balls and is rated above 400,000 RPM. Match the code, all three dimensions and construction details before ordering.\u003c\/p\u003e\u003c\/section\u003e\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eInternal SKU\u003c\/th\u003e\n\u003ctd\u003eHP-HS-X1\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eBearing code\u003c\/th\u003e\n\u003ctd\u003eSirona mini Boost\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eDimensions\u003c\/th\u003e\n\u003ctd\u003e3.175 × 6.35 × 2.38 mm (ID × OD × W)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eRated speed\u003c\/th\u003e\n\u003ctd\u003e\u0026gt; 400,000 RPM\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eMaterial\u003c\/th\u003e\n\u003ctd\u003e440C rings + Torlon polyimide cage + Si3N4 ceramic balls\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eApplication\u003c\/th\u003e\n\u003ctd\u003eHigh-speed dental handpiece repair\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eNet weight\u003c\/th\u003e\n\u003ctd\u003e10 g\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003ePacked shipping weight\u003c\/th\u003e\n\u003ctd\u003e20 g\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\u003ch2\u003eBefore Ordering\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eMatch the bearing code and all three dimensions with the removed bearing.\u003c\/li\u003e\n\u003cli\u003eConfirm the ball and cage materials required for the repair.\u003c\/li\u003e\n\u003cli\u003eCheck shield, flange, groove and ring-width details where applicable.\u003c\/li\u003e\n\u003cli\u003eInstallation and functional testing should be completed by a qualified repair technician.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cdetails open\u003e\u003csummary\u003e\u003cstrong\u003eEnglish Bearing Code Reference\u003c\/strong\u003e\u003c\/summary\u003e\u003cp\u003eUse this table to read common high-speed handpiece bearing designations. The product-specific specifications above take priority whenever a code is not present or the construction differs.\u003c\/p\u003e\n\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth scope=\"col\"\u003eCode\u003c\/th\u003e\n\u003cth scope=\"col\"\u003eMeaning\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eS\u003c\/th\u003e\n\u003ctd\u003eMaterial-series prefix. Refer to the product-specific Material row above for the actual ring, cage and ball materials.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eF\u003c\/th\u003e\n\u003ctd\u003eThrust flange on the outer ring. With a 2.38 mm outer-ring width, the flange is 0.60 mm wide; with a 2.78 mm outer-ring width, it is 0.80 mm wide. For a grooved outer ring (G), the flange is 0.45 mm wide.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eBasic designation\u003c\/th\u003e\n\u003ctd\u003eThis SKU uses a dimension- or application-based designation. Confirm the listed dimensions: 3.175 × 6.35 × 2.38 mm (ID × OD × W).\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eK1 \/ K2\u003c\/th\u003e\n\u003ctd\u003eAngular-contact construction. K1 indicates a separable inner ring; K2 indicates a separable outer ring. Angular-contact versions use a one-piece cage.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eTA \/ TL \/ Ti\u003c\/th\u003e\n\u003ctd\u003eCage material. TA: yellow polyimide; TL: black polyimide (Torlon); Ti: fabric-reinforced phenolic.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eK \/ G\u003c\/th\u003e\n\u003ctd\u003eOuter-ring profile. K indicates a stepped outer diameter; G indicates a grooved outer diameter.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eZ \/ Z1\u003c\/th\u003e\n\u003ctd\u003eShield configuration. Z indicates a one-sided shield; Z1 indicates an integral one-sided shield.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eW \/ W02\u003c\/th\u003e\n\u003ctd\u003eWidth code. W means both rings are 2.78 mm wide. W02 means the outer ring is 2.38 mm and the inner ring is 2.78 mm. With no width code, both rings are 2.38 mm wide.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eN\u003c\/th\u003e\n\u003ctd\u003eBall material. N indicates Si3N4 silicon-nitride ceramic balls. With no N code, the balls are 9Cr18Mo \/ AISI 440C steel.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003c\/details\u003e\u003csection data-seo-geo=\"common-questions\"\u003e\u003ch2\u003eCommon Questions\u003c\/h2\u003e\n\u003ch3\u003eWhat is HP-HS-X1?\u003c\/h3\u003e\n\u003cp\u003eHP-HS-X1 is our internal reference for a Sirona mini Boost replacement bearing. Its listed size is 3.175 × 6.35 × 2.38 mm (ID × OD × W), with ceramic balls and a Torlon cage.\u003c\/p\u003e\n\u003ch3\u003eHow do I confirm that this bearing will fit?\u003c\/h3\u003e\n\u003cp\u003eCompare the bearing code and the inner diameter, outer diameter and width with the removed bearing. Then confirm any shield, flange, groove, cage and ball-material requirements. A qualified handpiece repair technician should make the final fitment decision.\u003c\/p\u003e\n\u003ch3\u003eIs this an OEM bearing?\u003c\/h3\u003e\n\u003cp\u003eNo. This is an independent third-party replacement bearing. Brand and model names, when mentioned, are used only to identify compatibility; no manufacturer affiliation or endorsement is claimed.\u003c\/p\u003e\u003c\/section\u003e\u003cnav data-related-links=\"products\" aria-label=\"Related resources\"\u003e\u003ch2\u003eRelated Resources\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"\/collections\/high-speed-handpiece-bearings\"\u003eBrowse all high-speed handpiece bearings\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/blogs\/repair-guides\"\u003eRead dental handpiece repair guides\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\u003c\/nav\u003e\u003cp\u003e\u003cstrong\u003eCompatibility notice:\u003c\/strong\u003e HP-HS-X1 is an internal reseller SKU. This is an independent third-party replacement bearing and is not manufactured, sponsored, authorized or endorsed by the handpiece manufacturer. Final fitment must be verified before installation.\u003c\/p\u003e","brand":"Handpiece Parts Hub","offers":[{"title":"Default Title","offer_id":64436785873265,"sku":"HP-HS-X1","price":6.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1033\/9893\/2849\/files\/HP-HS-X1.png?v=1787191451"},{"product_id":"hp-hs-t1-high-speed-dental-handpiece-bearing","title":"HP-HS-T1 High-Speed Bearing – SR144TLW1.9N\/1.6N – 3.175 × 6.35 × 1.9 mm","description":"\u003cp\u003e\u003cstrong\u003eHP-HS-T1\u003c\/strong\u003e is an independent replacement bearing for professional high-speed dental handpiece repair. It is supplied under our internal HP reference so technicians can compare it with the original bearing before ordering.\u003c\/p\u003e\u003csection data-seo-geo=\"quick-answer\"\u003e\u003ch2\u003eQuick Answer\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eHP-HS-T1\u003c\/strong\u003e is a SR144TLW1.9N\/1.6N high-speed dental handpiece bearing measuring 3.175 × 6.35 × 1.9 mm (ID × OD × W). It uses 440C rings + Torlon polyimide cage + Si3N4 ceramic balls and is rated above 400,000 RPM. Match the code, all three dimensions and construction details before ordering.\u003c\/p\u003e\u003c\/section\u003e\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eInternal SKU\u003c\/th\u003e\n\u003ctd\u003eHP-HS-T1\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eBearing code\u003c\/th\u003e\n\u003ctd\u003eSR144TLW1.9N\/1.6N\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eDimensions\u003c\/th\u003e\n\u003ctd\u003e3.175 × 6.35 × 1.9 mm (ID × OD × W)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eRated speed\u003c\/th\u003e\n\u003ctd\u003e\u0026gt; 400,000 RPM\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eMaterial\u003c\/th\u003e\n\u003ctd\u003e440C rings + Torlon polyimide cage + Si3N4 ceramic balls\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eApplication\u003c\/th\u003e\n\u003ctd\u003eHigh-speed dental handpiece repair\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eNet weight\u003c\/th\u003e\n\u003ctd\u003e10 g\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003ePacked shipping weight\u003c\/th\u003e\n\u003ctd\u003e20 g\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\u003ch2\u003eBefore Ordering\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eMatch the bearing code and all three dimensions with the removed bearing.\u003c\/li\u003e\n\u003cli\u003eConfirm the ball and cage materials required for the repair.\u003c\/li\u003e\n\u003cli\u003eCheck shield, flange, groove and ring-width details where applicable.\u003c\/li\u003e\n\u003cli\u003eInstallation and functional testing should be completed by a qualified repair technician.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cdetails open\u003e\u003csummary\u003e\u003cstrong\u003eEnglish Bearing Code Reference\u003c\/strong\u003e\u003c\/summary\u003e\u003cp\u003eUse this table to read common high-speed handpiece bearing designations. The product-specific specifications above take priority whenever a code is not present or the construction differs.\u003c\/p\u003e\n\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth scope=\"col\"\u003eCode\u003c\/th\u003e\n\u003cth scope=\"col\"\u003eMeaning\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eS\u003c\/th\u003e\n\u003ctd\u003eMaterial-series prefix. Refer to the product-specific Material row above for the actual ring, cage and ball materials.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eF\u003c\/th\u003e\n\u003ctd\u003eThrust flange on the outer ring. With a 2.38 mm outer-ring width, the flange is 0.60 mm wide; with a 2.78 mm outer-ring width, it is 0.80 mm wide. For a grooved outer ring (G), the flange is 0.45 mm wide.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eR144\u003c\/th\u003e\n\u003ctd\u003eR144 is the basic series used in this designation. The listed dimensions for this SKU are 3.175 × 6.35 × 1.9 mm (ID × OD × W).\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eK1 \/ K2\u003c\/th\u003e\n\u003ctd\u003eAngular-contact construction. K1 indicates a separable inner ring; K2 indicates a separable outer ring. Angular-contact versions use a one-piece cage.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eTA \/ TL \/ Ti\u003c\/th\u003e\n\u003ctd\u003eCage material. TA: yellow polyimide; TL: black polyimide (Torlon); Ti: fabric-reinforced phenolic.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eK \/ G\u003c\/th\u003e\n\u003ctd\u003eOuter-ring profile. K indicates a stepped outer diameter; G indicates a grooved outer diameter.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eZ \/ Z1\u003c\/th\u003e\n\u003ctd\u003eShield configuration. Z indicates a one-sided shield; Z1 indicates an integral one-sided shield.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eW \/ W02\u003c\/th\u003e\n\u003ctd\u003eWidth code. W means both rings are 2.78 mm wide. W02 means the outer ring is 2.38 mm and the inner ring is 2.78 mm. With no width code, both rings are 2.38 mm wide.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eN\u003c\/th\u003e\n\u003ctd\u003eBall material. N indicates Si3N4 silicon-nitride ceramic balls. With no N code, the balls are 9Cr18Mo \/ AISI 440C steel.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003c\/details\u003e\u003csection data-seo-geo=\"common-questions\"\u003e\u003ch2\u003eCommon Questions\u003c\/h2\u003e\n\u003ch3\u003eWhat is HP-HS-T1?\u003c\/h3\u003e\n\u003cp\u003eHP-HS-T1 is our internal reference for a SR144TLW1.9N\/1.6N replacement bearing. Its listed size is 3.175 × 6.35 × 1.9 mm (ID × OD × W), with ceramic balls and a Torlon cage.\u003c\/p\u003e\n\u003ch3\u003eHow do I confirm that this bearing will fit?\u003c\/h3\u003e\n\u003cp\u003eCompare the bearing code and the inner diameter, outer diameter and width with the removed bearing. Then confirm any shield, flange, groove, cage and ball-material requirements. A qualified handpiece repair technician should make the final fitment decision.\u003c\/p\u003e\n\u003ch3\u003eIs this an OEM bearing?\u003c\/h3\u003e\n\u003cp\u003eNo. This is an independent third-party replacement bearing. Brand and model names, when mentioned, are used only to identify compatibility; no manufacturer affiliation or endorsement is claimed.\u003c\/p\u003e\u003c\/section\u003e\u003cnav data-related-links=\"products\" aria-label=\"Related resources\"\u003e\u003ch2\u003eRelated Resources\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"\/collections\/high-speed-handpiece-bearings\"\u003eBrowse all high-speed handpiece bearings\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/blogs\/repair-guides\"\u003eRead dental handpiece repair guides\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\u003c\/nav\u003e\u003cp\u003e\u003cstrong\u003eCompatibility notice:\u003c\/strong\u003e HP-HS-T1 is an internal reseller SKU. This is an independent third-party replacement bearing and is not manufactured, sponsored, authorized or endorsed by the handpiece manufacturer. Final fitment must be verified before installation.\u003c\/p\u003e","brand":"Handpiece Parts Hub","offers":[{"title":"Default Title","offer_id":64436785906033,"sku":"HP-HS-T1","price":6.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1033\/9893\/2849\/files\/HP-HS-T1.png?v=1787191451"},{"product_id":"hp-hs-t3-high-speed-dental-handpiece-bearing","title":"HP-HS-T3 High-Speed Bearing – Sirona T3 small bore – 3.17 × 6.35 × 2.38 mm","description":"\u003cp\u003e\u003cstrong\u003eHP-HS-T3\u003c\/strong\u003e is an independent replacement bearing for professional high-speed dental handpiece repair. It is supplied under our internal HP reference so technicians can compare it with the original bearing before ordering.\u003c\/p\u003e\u003csection data-seo-geo=\"quick-answer\"\u003e\u003ch2\u003eQuick Answer\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eHP-HS-T3\u003c\/strong\u003e is a Sirona T3 small bore high-speed dental handpiece bearing measuring 3.17 × 6.35 × 2.38 mm (ID × OD × W). It uses 440C rings + Torlon polyimide cage + Si3N4 ceramic balls and is rated above 400,000 RPM. Match the code, all three dimensions and construction details before ordering.\u003c\/p\u003e\u003c\/section\u003e\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eInternal SKU\u003c\/th\u003e\n\u003ctd\u003eHP-HS-T3\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eBearing code\u003c\/th\u003e\n\u003ctd\u003eSirona T3 small bore\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eDimensions\u003c\/th\u003e\n\u003ctd\u003e3.17 × 6.35 × 2.38 mm (ID × OD × W)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eRated speed\u003c\/th\u003e\n\u003ctd\u003e\u0026gt; 400,000 RPM\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eMaterial\u003c\/th\u003e\n\u003ctd\u003e440C rings + Torlon polyimide cage + Si3N4 ceramic balls\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eApplication\u003c\/th\u003e\n\u003ctd\u003eHigh-speed dental handpiece repair\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eNet weight\u003c\/th\u003e\n\u003ctd\u003e10 g\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003ePacked shipping weight\u003c\/th\u003e\n\u003ctd\u003e20 g\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\u003ch2\u003eBefore Ordering\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eMatch the bearing code and all three dimensions with the removed bearing.\u003c\/li\u003e\n\u003cli\u003eConfirm the ball and cage materials required for the repair.\u003c\/li\u003e\n\u003cli\u003eCheck shield, flange, groove and ring-width details where applicable.\u003c\/li\u003e\n\u003cli\u003eInstallation and functional testing should be completed by a qualified repair technician.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cdetails open\u003e\u003csummary\u003e\u003cstrong\u003eEnglish Bearing Code Reference\u003c\/strong\u003e\u003c\/summary\u003e\u003cp\u003eUse this table to read common high-speed handpiece bearing designations. The product-specific specifications above take priority whenever a code is not present or the construction differs.\u003c\/p\u003e\n\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth scope=\"col\"\u003eCode\u003c\/th\u003e\n\u003cth scope=\"col\"\u003eMeaning\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eS\u003c\/th\u003e\n\u003ctd\u003eMaterial-series prefix. Refer to the product-specific Material row above for the actual ring, cage and ball materials.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eF\u003c\/th\u003e\n\u003ctd\u003eThrust flange on the outer ring. With a 2.38 mm outer-ring width, the flange is 0.60 mm wide; with a 2.78 mm outer-ring width, it is 0.80 mm wide. For a grooved outer ring (G), the flange is 0.45 mm wide.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eBasic designation\u003c\/th\u003e\n\u003ctd\u003eThis SKU uses a dimension- or application-based designation. Confirm the listed dimensions: 3.17 × 6.35 × 2.38 mm (ID × OD × W).\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eK1 \/ K2\u003c\/th\u003e\n\u003ctd\u003eAngular-contact construction. K1 indicates a separable inner ring; K2 indicates a separable outer ring. Angular-contact versions use a one-piece cage.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eTA \/ TL \/ Ti\u003c\/th\u003e\n\u003ctd\u003eCage material. TA: yellow polyimide; TL: black polyimide (Torlon); Ti: fabric-reinforced phenolic.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eK \/ G\u003c\/th\u003e\n\u003ctd\u003eOuter-ring profile. K indicates a stepped outer diameter; G indicates a grooved outer diameter.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eZ \/ Z1\u003c\/th\u003e\n\u003ctd\u003eShield configuration. Z indicates a one-sided shield; Z1 indicates an integral one-sided shield.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eW \/ W02\u003c\/th\u003e\n\u003ctd\u003eWidth code. W means both rings are 2.78 mm wide. W02 means the outer ring is 2.38 mm and the inner ring is 2.78 mm. With no width code, both rings are 2.38 mm wide.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eN\u003c\/th\u003e\n\u003ctd\u003eBall material. N indicates Si3N4 silicon-nitride ceramic balls. With no N code, the balls are 9Cr18Mo \/ AISI 440C steel.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003c\/details\u003e\u003csection data-seo-geo=\"common-questions\"\u003e\u003ch2\u003eCommon Questions\u003c\/h2\u003e\n\u003ch3\u003eWhat is HP-HS-T3?\u003c\/h3\u003e\n\u003cp\u003eHP-HS-T3 is our internal reference for a Sirona T3 small bore replacement bearing. Its listed size is 3.17 × 6.35 × 2.38 mm (ID × OD × W), with ceramic balls and a Torlon cage.\u003c\/p\u003e\n\u003ch3\u003eHow do I confirm that this bearing will fit?\u003c\/h3\u003e\n\u003cp\u003eCompare the bearing code and the inner diameter, outer diameter and width with the removed bearing. Then confirm any shield, flange, groove, cage and ball-material requirements. A qualified handpiece repair technician should make the final fitment decision.\u003c\/p\u003e\n\u003ch3\u003eIs this an OEM bearing?\u003c\/h3\u003e\n\u003cp\u003eNo. This is an independent third-party replacement bearing. Brand and model names, when mentioned, are used only to identify compatibility; no manufacturer affiliation or endorsement is claimed.\u003c\/p\u003e\u003c\/section\u003e\u003cnav data-related-links=\"products\" aria-label=\"Related resources\"\u003e\u003ch2\u003eRelated Resources\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"\/collections\/high-speed-handpiece-bearings\"\u003eBrowse all high-speed handpiece bearings\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/blogs\/repair-guides\"\u003eRead dental handpiece repair guides\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\u003c\/nav\u003e\u003cp\u003e\u003cstrong\u003eCompatibility notice:\u003c\/strong\u003e HP-HS-T3 is an internal reseller SKU. This is an independent third-party replacement bearing and is not manufactured, sponsored, authorized or endorsed by the handpiece manufacturer. Final fitment must be verified before installation.\u003c\/p\u003e","brand":"Handpiece Parts Hub","offers":[{"title":"Default Title","offer_id":64436785938801,"sku":"HP-HS-T3","price":6.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1033\/9893\/2849\/files\/HP-HS-T3.png?v=1787191451"},{"product_id":"hp-hs-z1-high-speed-dental-handpiece-bearing","title":"HP-HS-Z1 High-Speed Bearing – SMR74TLN – 4 × 7 × 2 mm","description":"\u003cp\u003e\u003cstrong\u003eHP-HS-Z1\u003c\/strong\u003e is an independent replacement bearing for professional high-speed dental handpiece repair. It is supplied under our internal HP reference so technicians can compare it with the original bearing before ordering.\u003c\/p\u003e\u003csection data-seo-geo=\"quick-answer\"\u003e\u003ch2\u003eQuick Answer\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eHP-HS-Z1\u003c\/strong\u003e is a SMR74TLN high-speed dental handpiece bearing measuring 4 × 7 × 2 mm (ID × OD × W). It uses 440C rings + Torlon polyimide cage + Si3N4 ceramic balls and is rated above 200,000 RPM. Match the code, all three dimensions and construction details before ordering.\u003c\/p\u003e\u003c\/section\u003e\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eInternal SKU\u003c\/th\u003e\n\u003ctd\u003eHP-HS-Z1\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eBearing code\u003c\/th\u003e\n\u003ctd\u003eSMR74TLN\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eDimensions\u003c\/th\u003e\n\u003ctd\u003e4 × 7 × 2 mm (ID × OD × W)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eRated speed\u003c\/th\u003e\n\u003ctd\u003e\u0026gt; 200,000 RPM\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eMaterial\u003c\/th\u003e\n\u003ctd\u003e440C rings + Torlon polyimide cage + Si3N4 ceramic balls\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eApplication\u003c\/th\u003e\n\u003ctd\u003eHigh-speed dental handpiece repair\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eNet weight\u003c\/th\u003e\n\u003ctd\u003e10 g\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003ePacked shipping weight\u003c\/th\u003e\n\u003ctd\u003e20 g\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\u003ch2\u003eBefore Ordering\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eMatch the bearing code and all three dimensions with the removed bearing.\u003c\/li\u003e\n\u003cli\u003eConfirm the ball and cage materials required for the repair.\u003c\/li\u003e\n\u003cli\u003eCheck shield, flange, groove and ring-width details where applicable.\u003c\/li\u003e\n\u003cli\u003eInstallation and functional testing should be completed by a qualified repair technician.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cdetails open\u003e\u003csummary\u003e\u003cstrong\u003eEnglish Bearing Code Reference\u003c\/strong\u003e\u003c\/summary\u003e\u003cp\u003eUse this table to read common high-speed handpiece bearing designations. The product-specific specifications above take priority whenever a code is not present or the construction differs.\u003c\/p\u003e\n\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth scope=\"col\"\u003eCode\u003c\/th\u003e\n\u003cth scope=\"col\"\u003eMeaning\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eS\u003c\/th\u003e\n\u003ctd\u003eMaterial-series prefix. Refer to the product-specific Material row above for the actual ring, cage and ball materials.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eF\u003c\/th\u003e\n\u003ctd\u003eThrust flange on the outer ring. With a 2.38 mm outer-ring width, the flange is 0.60 mm wide; with a 2.78 mm outer-ring width, it is 0.80 mm wide. For a grooved outer ring (G), the flange is 0.45 mm wide.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eMR74\u003c\/th\u003e\n\u003ctd\u003eMR74 is the basic series used in this designation. The listed dimensions for this SKU are 4 × 7 × 2 mm (ID × OD × W).\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eK1 \/ K2\u003c\/th\u003e\n\u003ctd\u003eAngular-contact construction. K1 indicates a separable inner ring; K2 indicates a separable outer ring. Angular-contact versions use a one-piece cage.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eTA \/ TL \/ Ti\u003c\/th\u003e\n\u003ctd\u003eCage material. TA: yellow polyimide; TL: black polyimide (Torlon); Ti: fabric-reinforced phenolic.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eK \/ G\u003c\/th\u003e\n\u003ctd\u003eOuter-ring profile. K indicates a stepped outer diameter; G indicates a grooved outer diameter.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eZ \/ Z1\u003c\/th\u003e\n\u003ctd\u003eShield configuration. Z indicates a one-sided shield; Z1 indicates an integral one-sided shield.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eW \/ W02\u003c\/th\u003e\n\u003ctd\u003eWidth code. W means both rings are 2.78 mm wide. W02 means the outer ring is 2.38 mm and the inner ring is 2.78 mm. With no width code, both rings are 2.38 mm wide.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eN\u003c\/th\u003e\n\u003ctd\u003eBall material. N indicates Si3N4 silicon-nitride ceramic balls. With no N code, the balls are 9Cr18Mo \/ AISI 440C steel.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003c\/details\u003e\u003csection data-seo-geo=\"common-questions\"\u003e\u003ch2\u003eCommon Questions\u003c\/h2\u003e\n\u003ch3\u003eWhat is HP-HS-Z1?\u003c\/h3\u003e\n\u003cp\u003eHP-HS-Z1 is our internal reference for a SMR74TLN replacement bearing. Its listed size is 4 × 7 × 2 mm (ID × OD × W), with ceramic balls and a Torlon cage.\u003c\/p\u003e\n\u003ch3\u003eHow do I confirm that this bearing will fit?\u003c\/h3\u003e\n\u003cp\u003eCompare the bearing code and the inner diameter, outer diameter and width with the removed bearing. Then confirm any shield, flange, groove, cage and ball-material requirements. A qualified handpiece repair technician should make the final fitment decision.\u003c\/p\u003e\n\u003ch3\u003eIs this an OEM bearing?\u003c\/h3\u003e\n\u003cp\u003eNo. This is an independent third-party replacement bearing. Brand and model names, when mentioned, are used only to identify compatibility; no manufacturer affiliation or endorsement is claimed.\u003c\/p\u003e\u003c\/section\u003e\u003cnav data-related-links=\"products\" aria-label=\"Related resources\"\u003e\u003ch2\u003eRelated Resources\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"\/collections\/high-speed-handpiece-bearings\"\u003eBrowse all high-speed handpiece bearings\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/blogs\/repair-guides\"\u003eRead dental handpiece repair guides\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\u003c\/nav\u003e\u003cp\u003e\u003cstrong\u003eCompatibility notice:\u003c\/strong\u003e HP-HS-Z1 is an internal reseller SKU. This is an independent third-party replacement bearing and is not manufactured, sponsored, authorized or endorsed by the handpiece manufacturer. Final fitment must be verified before installation.\u003c\/p\u003e","brand":"Handpiece Parts Hub","offers":[{"title":"Default Title","offer_id":64436785971569,"sku":"HP-HS-Z1","price":6.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1033\/9893\/2849\/files\/HP-HS-Z1.png?v=1787191451"},{"product_id":"hp-hs-z2-high-speed-dental-handpiece-bearing","title":"HP-HS-Z2 High-Speed Bearing – SR133TLN – 2.38 × 4.76 × 1.58 mm","description":"\u003cp\u003e\u003cstrong\u003eHP-HS-Z2\u003c\/strong\u003e is an independent replacement bearing for professional high-speed dental handpiece repair. It is supplied under our internal HP reference so technicians can compare it with the original bearing before ordering.\u003c\/p\u003e\u003csection data-seo-geo=\"quick-answer\"\u003e\u003ch2\u003eQuick Answer\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eHP-HS-Z2\u003c\/strong\u003e is a SR133TLN high-speed dental handpiece bearing measuring 2.38 × 4.76 × 1.58 mm (ID × OD × W). It uses 440C rings + Torlon polyimide cage + Si3N4 ceramic balls and is rated above 200,000 RPM. Match the code, all three dimensions and construction details before ordering.\u003c\/p\u003e\u003c\/section\u003e\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eInternal SKU\u003c\/th\u003e\n\u003ctd\u003eHP-HS-Z2\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eBearing code\u003c\/th\u003e\n\u003ctd\u003eSR133TLN\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eDimensions\u003c\/th\u003e\n\u003ctd\u003e2.38 × 4.76 × 1.58 mm (ID × OD × W)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eRated speed\u003c\/th\u003e\n\u003ctd\u003e\u0026gt; 200,000 RPM\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eMaterial\u003c\/th\u003e\n\u003ctd\u003e440C rings + Torlon polyimide cage + Si3N4 ceramic balls\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eApplication\u003c\/th\u003e\n\u003ctd\u003eHigh-speed dental handpiece repair\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eNet weight\u003c\/th\u003e\n\u003ctd\u003e10 g\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003ePacked shipping weight\u003c\/th\u003e\n\u003ctd\u003e20 g\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\u003ch2\u003eBefore Ordering\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eMatch the bearing code and all three dimensions with the removed bearing.\u003c\/li\u003e\n\u003cli\u003eConfirm the ball and cage materials required for the repair.\u003c\/li\u003e\n\u003cli\u003eCheck shield, flange, groove and ring-width details where applicable.\u003c\/li\u003e\n\u003cli\u003eInstallation and functional testing should be completed by a qualified repair technician.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cdetails open\u003e\u003csummary\u003e\u003cstrong\u003eEnglish Bearing Code Reference\u003c\/strong\u003e\u003c\/summary\u003e\u003cp\u003eUse this table to read common high-speed handpiece bearing designations. The product-specific specifications above take priority whenever a code is not present or the construction differs.\u003c\/p\u003e\n\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth scope=\"col\"\u003eCode\u003c\/th\u003e\n\u003cth scope=\"col\"\u003eMeaning\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eS\u003c\/th\u003e\n\u003ctd\u003eMaterial-series prefix. Refer to the product-specific Material row above for the actual ring, cage and ball materials.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eF\u003c\/th\u003e\n\u003ctd\u003eThrust flange on the outer ring. With a 2.38 mm outer-ring width, the flange is 0.60 mm wide; with a 2.78 mm outer-ring width, it is 0.80 mm wide. For a grooved outer ring (G), the flange is 0.45 mm wide.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eR133\u003c\/th\u003e\n\u003ctd\u003eR133 is the basic series used in this designation. The listed dimensions for this SKU are 2.38 × 4.76 × 1.58 mm (ID × OD × W).\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eK1 \/ K2\u003c\/th\u003e\n\u003ctd\u003eAngular-contact construction. K1 indicates a separable inner ring; K2 indicates a separable outer ring. Angular-contact versions use a one-piece cage.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eTA \/ TL \/ Ti\u003c\/th\u003e\n\u003ctd\u003eCage material. TA: yellow polyimide; TL: black polyimide (Torlon); Ti: fabric-reinforced phenolic.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eK \/ G\u003c\/th\u003e\n\u003ctd\u003eOuter-ring profile. K indicates a stepped outer diameter; G indicates a grooved outer diameter.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eZ \/ Z1\u003c\/th\u003e\n\u003ctd\u003eShield configuration. Z indicates a one-sided shield; Z1 indicates an integral one-sided shield.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eW \/ W02\u003c\/th\u003e\n\u003ctd\u003eWidth code. W means both rings are 2.78 mm wide. W02 means the outer ring is 2.38 mm and the inner ring is 2.78 mm. With no width code, both rings are 2.38 mm wide.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eN\u003c\/th\u003e\n\u003ctd\u003eBall material. N indicates Si3N4 silicon-nitride ceramic balls. With no N code, the balls are 9Cr18Mo \/ AISI 440C steel.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003c\/details\u003e\u003csection data-seo-geo=\"common-questions\"\u003e\u003ch2\u003eCommon Questions\u003c\/h2\u003e\n\u003ch3\u003eWhat is HP-HS-Z2?\u003c\/h3\u003e\n\u003cp\u003eHP-HS-Z2 is our internal reference for a SR133TLN replacement bearing. Its listed size is 2.38 × 4.76 × 1.58 mm (ID × OD × W), with ceramic balls and a Torlon cage.\u003c\/p\u003e\n\u003ch3\u003eHow do I confirm that this bearing will fit?\u003c\/h3\u003e\n\u003cp\u003eCompare the bearing code and the inner diameter, outer diameter and width with the removed bearing. Then confirm any shield, flange, groove, cage and ball-material requirements. A qualified handpiece repair technician should make the final fitment decision.\u003c\/p\u003e\n\u003ch3\u003eIs this an OEM bearing?\u003c\/h3\u003e\n\u003cp\u003eNo. This is an independent third-party replacement bearing. Brand and model names, when mentioned, are used only to identify compatibility; no manufacturer affiliation or endorsement is claimed.\u003c\/p\u003e\u003c\/section\u003e\u003cnav data-related-links=\"products\" aria-label=\"Related resources\"\u003e\u003ch2\u003eRelated Resources\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"\/collections\/high-speed-handpiece-bearings\"\u003eBrowse all high-speed handpiece bearings\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/blogs\/repair-guides\"\u003eRead dental handpiece repair guides\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\u003c\/nav\u003e\u003cp\u003e\u003cstrong\u003eCompatibility notice:\u003c\/strong\u003e HP-HS-Z2 is an internal reseller SKU. This is an independent third-party replacement bearing and is not manufactured, sponsored, authorized or endorsed by the handpiece manufacturer. Final fitment must be verified before installation.\u003c\/p\u003e","brand":"Handpiece Parts Hub","offers":[{"title":"Default Title","offer_id":64436786004337,"sku":"HP-HS-Z2","price":6.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1033\/9893\/2849\/files\/HP-HS-Z2.png?v=1787191451"},{"product_id":"hp-hs-z3-high-speed-dental-handpiece-bearing","title":"HP-HS-Z3 High-Speed Bearing – SR133TLWN – 2.38 × 4.76 × 2.38 mm","description":"\u003cp\u003e\u003cstrong\u003eHP-HS-Z3\u003c\/strong\u003e is an independent replacement bearing for professional high-speed dental handpiece repair. It is supplied under our internal HP reference so technicians can compare it with the original bearing before ordering.\u003c\/p\u003e\u003csection data-seo-geo=\"quick-answer\"\u003e\u003ch2\u003eQuick Answer\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eHP-HS-Z3\u003c\/strong\u003e is a SR133TLWN high-speed dental handpiece bearing measuring 2.38 × 4.76 × 2.38 mm (ID × OD × W). It uses 440C rings + Torlon polyimide cage + Si3N4 ceramic balls and is rated above 200,000 RPM. Match the code, all three dimensions and construction details before ordering.\u003c\/p\u003e\u003c\/section\u003e\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eInternal SKU\u003c\/th\u003e\n\u003ctd\u003eHP-HS-Z3\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eBearing code\u003c\/th\u003e\n\u003ctd\u003eSR133TLWN\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eDimensions\u003c\/th\u003e\n\u003ctd\u003e2.38 × 4.76 × 2.38 mm (ID × OD × W)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eRated speed\u003c\/th\u003e\n\u003ctd\u003e\u0026gt; 200,000 RPM\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eMaterial\u003c\/th\u003e\n\u003ctd\u003e440C rings + Torlon polyimide cage + Si3N4 ceramic balls\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eApplication\u003c\/th\u003e\n\u003ctd\u003eHigh-speed dental handpiece repair\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eNet weight\u003c\/th\u003e\n\u003ctd\u003e10 g\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003ePacked shipping weight\u003c\/th\u003e\n\u003ctd\u003e20 g\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\u003ch2\u003eBefore Ordering\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eMatch the bearing code and all three dimensions with the removed bearing.\u003c\/li\u003e\n\u003cli\u003eConfirm the ball and cage materials required for the repair.\u003c\/li\u003e\n\u003cli\u003eCheck shield, flange, groove and ring-width details where applicable.\u003c\/li\u003e\n\u003cli\u003eInstallation and functional testing should be completed by a qualified repair technician.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cdetails open\u003e\u003csummary\u003e\u003cstrong\u003eEnglish Bearing Code Reference\u003c\/strong\u003e\u003c\/summary\u003e\u003cp\u003eUse this table to read common high-speed handpiece bearing designations. The product-specific specifications above take priority whenever a code is not present or the construction differs.\u003c\/p\u003e\n\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth scope=\"col\"\u003eCode\u003c\/th\u003e\n\u003cth scope=\"col\"\u003eMeaning\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eS\u003c\/th\u003e\n\u003ctd\u003eMaterial-series prefix. Refer to the product-specific Material row above for the actual ring, cage and ball materials.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eF\u003c\/th\u003e\n\u003ctd\u003eThrust flange on the outer ring. With a 2.38 mm outer-ring width, the flange is 0.60 mm wide; with a 2.78 mm outer-ring width, it is 0.80 mm wide. For a grooved outer ring (G), the flange is 0.45 mm wide.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eR133\u003c\/th\u003e\n\u003ctd\u003eR133 is the basic series used in this designation. The listed dimensions for this SKU are 2.38 × 4.76 × 2.38 mm (ID × OD × W).\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eK1 \/ K2\u003c\/th\u003e\n\u003ctd\u003eAngular-contact construction. K1 indicates a separable inner ring; K2 indicates a separable outer ring. Angular-contact versions use a one-piece cage.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eTA \/ TL \/ Ti\u003c\/th\u003e\n\u003ctd\u003eCage material. TA: yellow polyimide; TL: black polyimide (Torlon); Ti: fabric-reinforced phenolic.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eK \/ G\u003c\/th\u003e\n\u003ctd\u003eOuter-ring profile. K indicates a stepped outer diameter; G indicates a grooved outer diameter.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eZ \/ Z1\u003c\/th\u003e\n\u003ctd\u003eShield configuration. Z indicates a one-sided shield; Z1 indicates an integral one-sided shield.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eW \/ W02\u003c\/th\u003e\n\u003ctd\u003eWidth code. W means both rings are 2.78 mm wide. W02 means the outer ring is 2.38 mm and the inner ring is 2.78 mm. With no width code, both rings are 2.38 mm wide.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eN\u003c\/th\u003e\n\u003ctd\u003eBall material. N indicates Si3N4 silicon-nitride ceramic balls. With no N code, the balls are 9Cr18Mo \/ AISI 440C steel.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003c\/details\u003e\u003csection data-seo-geo=\"common-questions\"\u003e\u003ch2\u003eCommon Questions\u003c\/h2\u003e\n\u003ch3\u003eWhat is HP-HS-Z3?\u003c\/h3\u003e\n\u003cp\u003eHP-HS-Z3 is our internal reference for a SR133TLWN replacement bearing. Its listed size is 2.38 × 4.76 × 2.38 mm (ID × OD × W), with ceramic balls and a Torlon cage.\u003c\/p\u003e\n\u003ch3\u003eHow do I confirm that this bearing will fit?\u003c\/h3\u003e\n\u003cp\u003eCompare the bearing code and the inner diameter, outer diameter and width with the removed bearing. Then confirm any shield, flange, groove, cage and ball-material requirements. A qualified handpiece repair technician should make the final fitment decision.\u003c\/p\u003e\n\u003ch3\u003eIs this an OEM bearing?\u003c\/h3\u003e\n\u003cp\u003eNo. This is an independent third-party replacement bearing. Brand and model names, when mentioned, are used only to identify compatibility; no manufacturer affiliation or endorsement is claimed.\u003c\/p\u003e\u003c\/section\u003e\u003cnav data-related-links=\"products\" aria-label=\"Related resources\"\u003e\u003ch2\u003eRelated Resources\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"\/collections\/high-speed-handpiece-bearings\"\u003eBrowse all high-speed handpiece bearings\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/blogs\/repair-guides\"\u003eRead dental handpiece repair guides\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\u003c\/nav\u003e\u003cp\u003e\u003cstrong\u003eCompatibility notice:\u003c\/strong\u003e HP-HS-Z3 is an internal reseller SKU. This is an independent third-party replacement bearing and is not manufactured, sponsored, authorized or endorsed by the handpiece manufacturer. Final fitment must be verified before installation.\u003c\/p\u003e","brand":"Handpiece Parts Hub","offers":[{"title":"Default Title","offer_id":64436786037105,"sku":"HP-HS-Z3","price":7.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1033\/9893\/2849\/files\/HP-HS-Z3.png?v=1787191451"}],"url":"https:\/\/handpiecepartshub.com\/collections\/high-speed-handpiece-bearings.oembed","provider":"Handpiece Parts Hub","version":"1.0","type":"link"}