{"title":"Outer Diameter - 31mm","description":"\u003ch1\u003e31mm\u003c\/h1\u003e\u003ch2\u003e31mm Online shopping\u003c\/h2\u003e","products":[{"product_id":"mr3121-2rs-full-complement-ceramic-bearing-21","title":"Full Ceramic Sealed Ball Bearing Zirconia ZrO2 21.5x31x7mm Full Complement 2RS High-Precision Bearing For Lightweight Durable Smooth Operation In Precision Machinery And Upgraded Applications","description":"\u003cdiv\u003ePremium Ceramic Ball Bearing MR3121-2RS 21.5x31x7 (Single)\u003cbr\u003e\n✔️ Full ceramic ZrO2 seal, 21.5mm ID, 31mm OD, 7mm width \u003cp\u003eThis full ceramic MR3121-2RS bearing uses zirconia (ZrO2) for the balls and races, delivering dry-running performance with excellent wear resistance. Sized at 21.5 x 31 x 7 mm, it’s a solid choice for precision machinery, robotics, CNC tooling, and medical devices where low friction and long life matter.\u003c\/p\u003e \u003cp\u003e✅ Inner diameter: 21.5 mm (0.846 in)\u003cbr\u003e✅ Outer diameter: 31 mm (1.22 in)\u003cbr\u003e✅ Width: 7 mm (0.276 in)\u003cbr\u003e✅ Material: ZrO2 ceramic, full-complement, PTFE seals\u003cbr\u003e\u003c\/p\u003e \u003cp\u003e💡 What is a ceramic sealed ball bearing used for in precision machinery and automation?\u003c\/p\u003e\n\u003cp\u003eThey are handy in automated systems where smooth, accurate motion matters.\u003c\/p\u003e\n- pillow block bearing applications in robotics and automation\n- sealed ceramic bearings for high-speed spindles and clean environments\n- zirconia ceramic bearings offer low friction and corrosion resistance \u003cp\u003e\u003c\/p\u003e\n\u003c\/div\u003e","brand":"VXB","offers":[{"title":"Default Title","offer_id":43545616908523,"sku":"Kit8448","price":49.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0662\/3268\/0683\/files\/mr3121-2rs-full-complement-ceramic-bearing-21-5x31x7-zro2-bearings-vxb-ball-bearings.jpg?v=1770442355"},{"product_id":"full-ceramic-sealed-bearing-22x31x7-zro2","title":"Full Ceramic Sealed Bearing 22x31x7mm ZrO2","description":"\u003cp\u003e22x31x7 Full Ceramic Sealed Ball Bearing\u003cbr\u003e✔️ Zirconia (ZrO₂) - 22mm x 31mm x 7mm\u003c\/p\u003e\n\u003cp\u003eThis 22x31x7 full ceramic sealed ball bearing is built for performance in extreme environments where steel bearings may fail. Made entirely from zirconia (ZrO₂) ceramic with a PTFE cage and seals, it offers corrosion resistance, low friction, and smooth operation under high temperatures or harsh conditions.\u003c\/p\u003e\n\u003cp\u003e✅ Full ceramic ball bearing type\u003cbr\u003e✅ Inner diameter: 22mm\u003cbr\u003e✅ Outer diameter: 31mm\u003cbr\u003e✅ Width: 7mm\u003cbr\u003e✅ Balls: Zirconia (ZrO₂) ceramic\u003cbr\u003e✅ Races: Zirconia (ZrO₂) ceramic\u003cbr\u003e✅ Cage: PTFE material\u003cbr\u003e✅ Closures: PTFE covers\u003cbr\u003e✅ Pack size: 1 bearing\u003c\/p\u003e\n\u003cp\u003eTable of Dimensions:\u003c\/p\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eInner Diameter (ID)\u003c\/th\u003e\n\u003cth\u003eOuter Diameter (OD)\u003c\/th\u003e\n\u003cth\u003eWidth\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e22mm\u003c\/td\u003e\n\u003ctd\u003e31mm\u003c\/td\u003e\n\u003ctd\u003e7mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e💡 Why choose full ceramic sealed bearings over steel?\u003cbr\u003eFull ceramic bearings are engineered for specialized applications where durability and resistance are critical.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003eResist corrosion, moisture, and most chemicals\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eOperate with lower friction for smoother motion\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eWithstand higher temperatures than chrome steel bearings\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eGreat for marine, medical, and high-speed machinery\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eIf you’re looking for a high-performance bearing that stays strong where steel can’t, this one’s the right choice, order today and keep your systems running reliably.\u003c\/p\u003e","brand":"VXB","offers":[{"title":"Default Title","offer_id":43546895417579,"sku":"Kit11287","price":49.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0662\/3268\/0683\/files\/1_9173a0ca-c097-4d68-a4fe-2727079ad8f2.jpg?v=1770442398"},{"product_id":"smr3121-5-2rs-ceramic-bearing-21-5x31x7-si3n4","title":"SMR3121.5-2RS Ceramic Bearing 21.5x31x7 Si3N4 PTFE ABEC-5 Bearing","description":"\u003ccenter\u003e\n\u003ctable cellspacing=\"2\" cellpadding=\"10\" bg=\"\" border=\"1\"\u003e\u003ctbody\u003e\u003ctr\u003e\u003ctd align=\"center\"\u003e\u003cfont face=\"Tahoma\" size=\"+2\"\u003e21.5 x 31 x 7 Stainless Steel Premium ABEC-5 Ball Bearing\u003cbr\u003e Silicon Nitride Ceramic Balls\u003cbr\u003e 2 PTFE Seals\u003c\/font\u003e\u003c\/td\u003e\u003c\/tr\u003e\u003c\/tbody\u003e\u003c\/table\u003e\n\u003cbr\u003e\u003cbr\u003e\u003ctable cellspacing=\"2\" cellpadding=\"10\" bg=\"\" border=\"0\"\u003e\u003ctbody\u003e\u003ctr\u003e\n\u003ctd valign=\"center\" align=\"center\" width=\"15%\"\u003e\u003ctable cellspacing=\"3\" cellpadding=\"5\" bg=\"\" border=\"0\"\u003e\u003ctbody\u003e\n\u003ctr\u003e\u003ctd valign=\"center\" align=\"center\"\u003e\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd valign=\"center\" align=\"center\"\u003e\u003c\/td\u003e\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\u003c\/td\u003e\n\u003ctd align=\"left\" valign=\"top\" width=\"75%\"\u003e\n\u003cp align=\"justify\"\u003e\u003cfont face=\"tahoma\"\u003e21.5 x 31 x 7 Stainless Steel Premium ABEC-5 Ball Bearing, Silicon Nitride ceramic balls, inner diameter is 21.5mm, outer diameter is 31mm and width is 7mm.\u003c\/font\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cfont face=\"tahoma\"\u003e21.5 x 31 x 7 Ball Bearing\u003c\/font\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cfont face=\"tahoma\"\u003eDeep Groove Radial Ball Bearing\u003c\/font\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cfont face=\"tahoma\"\u003eClosures: PTFE Sealed\u003c\/font\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cfont face=\"tahoma\"\u003eQuality: Premium ABEC-5\u003c\/font\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cfont face=\"tahoma\"\u003eMaterial: Stainless Steel\u003c\/font\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cfont face=\"tahoma\"\u003eBalls: Silicon Nitride Ceramic (Si3N4)\u003c\/font\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cfont face=\"tahoma\"\u003eLubrication: Self Lubricated (Grease SRL) Bearing\u003c\/font\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cfont face=\"tahoma\"\u003eDimensions: 21.5mm x 31mm x 7mm\/Metric\u003c\/font\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cfont face=\"tahoma\"\u003eID (inner diameter)\/Bore: 21.5mm\u003c\/font\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cfont face=\"tahoma\"\u003eOD (outer diameter): 31mm\u003c\/font\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cfont face=\"tahoma\"\u003eWidth: 7mm\u003c\/font\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cfont face=\"tahoma\"\u003eQuantity: 1 Bearing\u003c\/font\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\u003c\/tbody\u003e\u003c\/table\u003e\n\u003c\/center\u003e\u003c!--Beginning HYBRID CERAMIC BEARINGS--\u003e\u003cp\u003e\u003cbr\u003e\u003csmall\u003e\u003cem\u003eVXB Category: Hybrid ceramic bearings\u003c\/em\u003e\u003c\/small\u003e\u003cbr\u003e\u003c!--Ending HYBRID CERAMIC BEARINGS--\u003e\u003cbr\u003e\u003c\/p\u003e\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\u003cbr\u003e\u003ch3\u003e💡 What Does ABEC-5 Mean?\u003c\/h3\u003e \u003cp\u003eABEC-5 is a precision rating from the \u003cem\u003eAnnular Bearing Engineers’ Committee (ABEC)\u003c\/em\u003e, indicating that the bearing is manufactured with tighter tolerances for improved accuracy and performance.\u003c\/p\u003e \u003cp\u003eBearings rated ABEC-5 are designed for high-speed, low-friction operation, making them ideal for electric motors, precision tools, 3D printers, and performance equipment where smooth rotation and long service life are essential.\u003c\/p\u003e\u003cbr\u003e OldFormat","brand":"VXB","offers":[{"title":"Default Title","offer_id":43546943946987,"sku":"Kit11865","price":29.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0662\/3268\/0683\/files\/smr3121-5-2rs-ceramic-bearing-21-5x31x7-si3n4-ptfe-abec-5-bearings-vxb-ball-bearings.jpg?v=1770442404"},{"product_id":"smr3121-5-ceramic-bearing-21-5mm-metric-seale","title":"SMR3121.5 Ceramic Bearing 21.5mm Metric Sealed ABEC-5 Bearing","description":"\u003ccenter\u003e\n\u003ctable cellspacing=\"2\" cellpadding=\"10\" bg=\"\" border=\"1\"\u003e\u003ctbody\u003e\u003ctr\u003e\u003ctd align=\"Center\"\u003e\u003cfont face=\"Tahoma\" size=\"+2\"\u003eSMR3121.5 Premium ABEC-5 Stainless Steel Ball Bearing\u003cbr\u003eSilicon Nitride Ceramic Balls\u003cbr\u003e 21.5 x 31 x 7 mm\u003c\/font\u003e\u003c\/td\u003e\u003c\/tr\u003e\u003c\/tbody\u003e\u003c\/table\u003e\n\u003cbr\u003e\u003cbr\u003e\u003ctable cellspacing=\"2\" cellpadding=\"5\" bg=\"\" border=\"1\"\u003e\u003ctbody\u003e\u003ctr\u003e\n\u003ctd valign=\"center\" align=\"Center\" width=\"\"\u003e\u003ctable cellspacing=\"3\" cellpadding=\"5\" bg=\"\" border=\"0\"\u003e\u003ctbody\u003e\u003ctr\u003e\u003ctd valign=\"center\" align=\"Center\"\u003e\u003c\/td\u003e\u003c\/tr\u003e\u003c\/tbody\u003e\u003c\/table\u003e\u003c\/td\u003e\n\u003ctd align=\"left\" valign=\"top\" width=\"\"\u003e\u003cfont face=\"tahoma\"\u003e\u003cp align=\"justify\"\u003eSMR3121.5 Premium ABEC-5 Stainless Steel Ball Bearing, bearing is Silicon Nitride ceramic ball.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eSMR3121.5 Ball Bearing\u003c\/li\u003e\n\u003cli\u003eQuality: Premium ABEC-5\u003c\/li\u003e\n\u003cli\u003eClosures: Open\u003c\/li\u003e\n\u003cli\u003eMaterial: Stainless Steel \u003c\/li\u003e\n\u003cli\u003eBalls: Silicon Nitride Ceramic (Si3N4) \u003c\/li\u003e\n\u003cli\u003eDimensions: 21.5mm x 31mm x 7mm\/Metric\u003c\/li\u003e\n\u003cli\u003eID (inner diameter)\/Bore: 21.5mm\u003c\/li\u003e\n\u003cli\u003eOD (outer diameter): 31mm\u003c\/li\u003e\n\u003cli\u003eWidth: 7mm\u003c\/li\u003e\n\u003cli\u003eDimensions: 21.5 x 31 x 7 mm\u003c\/li\u003e\n\u003cli\u003eQuantity: 1 Bearing \u003c\/li\u003e\n\u003c\/ul\u003e\u003c\/font\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\u003c\/tbody\u003e\u003c\/table\u003e\n\u003c\/center\u003e\u003c!--Beginning HYBRID CERAMIC BEARINGS--\u003e\u003cbr\u003e\u003csmall\u003e\u003ci\u003eVXB Category: Hybrid ceramic bearings\u003c\/i\u003e\u003c\/small\u003e\u003cbr\u003e\u003c!--Ending HYBRID CERAMIC BEARINGS--\u003e\u003cbr\u003e\u003cbr\u003e\u003cbr\u003e\u003ch3\u003e💡 What Does ABEC-5 Mean?\u003c\/h3\u003e \u003cp\u003eABEC-5 is a precision rating from the \u003cem\u003eAnnular Bearing Engineers’ Committee (ABEC)\u003c\/em\u003e, indicating that the bearing is manufactured with tighter tolerances for improved accuracy and performance.\u003c\/p\u003e \u003cp\u003eBearings rated ABEC-5 are designed for high-speed, low-friction operation, making them ideal for electric motors, precision tools, 3D printers, and performance equipment where smooth rotation and long service life are essential.\u003c\/p\u003e\u003cbr\u003e OldFormat","brand":"VXB","offers":[{"title":"Default Title","offer_id":43547195670763,"sku":"Kit13043","price":29.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0662\/3268\/0683\/files\/smr3121-5-ceramic-bearing-21-5mm-metric-sealed-abec-5-bearings-vxb-ball-bearings-1.jpg?v=1770442414"},{"product_id":"173110-2rs-bearing-17x31x10-sealed","title":"173110-2RS Bearing 17x31x10mm Sealed Ball Bearing","description":"\u003cdiv\u003eSealed Deep Groove Ball Bearing 17x31x10mm, 2RS \u003cbr\u003e\n✔️ 17x31x10mm seal bearing, 52100 steel, single bearing  \u003cp\u003eThe 173110-2RS is a sealed deep groove ball bearing designed for compact motion in small motors, pulleys, drives, or linear slide units. It stays clean and delivers smooth spins in tight spaces.\u003c\/p\u003e ✅ Pack size: 1 bearing\u003cbr\u003e\n✅ Inner diameter: 17mm\u003cbr\u003e\n✅ Outer diameter: 31mm\u003cbr\u003e\n✅ Width: 10mm\u003cbr\u003e\n✅ Material: 52100 chrome steel\u003cbr\u003e\n✅ Closures: Double blue rubber seals\u003cbr\u003e\n✅ Lubrication: Factory pre-greased\u003cbr\u003e\n✅ Bearing type: Deep groove radial\u003cbr\u003e\n \u003cp\u003e💡 What is a sealed ball bearing used for in compact motion systems?\u003c\/p\u003e\nThis handy bearing is designed to provide smooth, reliable rotation in tight spaces.\n- Used in motors, pulleys, gear drives, and linear slide units\u003cbr\u003e\n- Sealed to keep out dirt and moisture for longer life\u003cbr\u003e\n- Pre-lubricated for immediate use and low maintenance\u003cbr\u003e\n \u003c\/div\u003e","brand":"VXB","offers":[{"title":"Default Title","offer_id":43549362061547,"sku":"Kit18509","price":9.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0662\/3268\/0683\/files\/1_2093926d-d783-4360-b3f5-5507ccbbe7a3.jpg?v=1773365014"},{"product_id":"163110-2rs-bearing-16x31x10-sealed","title":"163110-2RS Bearing 16x31x10mm Sealed 16mm x 31mm x 10mm","description":"\u003cdiv\u003eSealed 16x31x10mm Ball Bearing 163110-2RS, Chrome Steel\u003cbr\u003e\n✔️ ID 16mm, OD 31mm, width 10mm; sealed, pre-lubed, 1 bearing \u003cp\u003eThe sealed 16x31x10mm ball bearing is a compact, pre-lubed unit ideal for small motors, hobby CNCs, conveyors, and linear actuators. It keeps dirt out and grease in for longer life in dusty or damp environments.\u003c\/p\u003e ✅ Inner diameter: 16mm\u003cbr\u003e\n✅ Outer diameter: 31mm\u003cbr\u003e\n✅ Width: 10mm\u003cbr\u003e\n✅ Two blue rubber seals protect from dust\u003cbr\u003e\n✅ Chrome steel (52100 alloy) construction\u003cbr\u003e\n✅ Pre-lubricated with grease\u003cbr\u003e\n✅ Pack size: 1 bearing\u003cbr\u003e \u003cp\u003e💡 What is a sealed ball bearing used for in typical machinery?\u003c\/p\u003e\nThese bearings are handy for compact machinery and harsh environments.\n- Sealed bearing for motors, conveyors, and small gearboxes\n- Extends service life by keeping grease in and dirt out\n- Handy for compact projects like hobby CNCs and automated setups\u003c\/div\u003e","brand":"VXB","offers":[{"title":"Default Title","offer_id":43549362389227,"sku":"Kit18510","price":19.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0662\/3268\/0683\/files\/163110-2rs-bearing-16x31x10-sealed-16mm-x-31mm-x-10mm-vxb-ball-bearings-1.jpg?v=1773365007"},{"product_id":"215317-2rs-sealed-bearing-21-5x31x7-metric","title":"Sealed Chrome Steel Ball Bearing 21.5mm By 31mm By 7mm With Rubber Seals 2RS Self Lubricating High Performance For Machinery Automotive Industrial Use Featuring Chrome Steel Balls And Steel Cage","description":"\u003cdiv\u003eCompact 21.5x31x7 sealed ball bearing, single unit\u003cbr\u003e\n✔️ 21.5mm bore x 31mm outer x 7mm width; chrome steel, double rubber seals \u003cp\u003eThis sealed ball bearing is a compact, high-quality radial unit designed for small machinery, robotics, and hobby CNC setups. It’s built to run smooth at higher speeds and is pre-lubricated with grease for quick, maintenance-light installation.\u003c\/p\u003e \u003cp\u003e✅ Inner diameter 21.5 mm\u003cbr\u003e\n✅ Outer diameter 31 mm\u003cbr\u003e\n✅ Width 7 mm\u003cbr\u003e\n✅ Material chrome steel\u003cbr\u003e\n✅ Cage steel\u003cbr\u003e\n✅ Seals double rubber RS\u003cbr\u003e\n✅ Lubrication pre-lubricated with grease EMQ\u003c\/p\u003e \u003cp\u003e💡 What is a sealed ball bearing used for in small machinery and drive assemblies? This handy part keeps grease in and dust out to extend service life.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eSealed design limits contamination and grease loss in compact systems\u003c\/li\u003e\n\u003cli\u003eHandles radial loads with smooth rotation in tight spaces\u003c\/li\u003e\n\u003cli\u003eIdeal for hobby CNC, robotics, and light industrial drives\u003c\/li\u003e\n\u003c\/ul\u003e \u003c\/div\u003e","brand":"VXB","offers":[{"title":"Default Title","offer_id":43550065328363,"sku":"Kit21084","price":39.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0662\/3268\/0683\/files\/215317-2rs-sealed-bearing-21-5x31x7-metric-vxb-ball-bearings-1.jpg?v=1773354444"},{"product_id":"mr2231-2rs-full-complement-ceramic-zro2-seale","title":"22x31x7mm Full Complement Ceramic Sealed Ball Bearing In Zirconia ZrO2 Full Ceramic Construction Double Seal For Precision Low Friction Wear Resistant And Corrosion Resistant For Industrial And Commercial Use","description":"\u003cdiv\u003eSingle 22x31x7 mm full ceramic ZrO2 sealed bearing\u003cbr\u003e\n✔️ 22x31x7 mm, full ceramic ZrO2, PTFE cage, sealed bearings \u003cp\u003eThis single full ceramic sealed ball bearing uses zirconia (ZrO2) and PTFE cages for minimal friction and corrosion resistance. Commonly used in precision motors, automation, and lab equipment where reliability matters.\u003c\/p\u003e ✅ Inner diameter 22 mm (0.87 in) \u003cbr\u003e\n✅ Outer diameter 31 mm (1.22 in) \u003cbr\u003e\n✅ Width 7 mm (0.28 in) \u003cbr\u003e\n✅ Ball material: ZrO2 ceramic; Cage: PTFE \u003cbr\u003e\n✅ Seals: PTFE covers \u003cbr\u003e \u003cp\u003e💡 What is a ceramic ball bearing used for? They are handy for demanding environments where corrosion resistance and low friction are key.\u003cbr\u003e- High-speed operation with low wear\u003cbr\u003e- Corrosion resistance in wet or chemical settings\u003cbr\u003e- Precision alignment for sensitive machinery\u003c\/p\u003e\n\u003c\/div\u003e","brand":"VXB","offers":[{"title":"Default Title","offer_id":43552533020907,"sku":"FULL MR2231-2RS","price":49.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0662\/3268\/0683\/files\/1_9e48352b-9ef8-4de5-b376-264c28898d21.jpg?v=1770442598"},{"product_id":"oil-seal-tc-10x31x7mm","title":"Oil Seal TC 10x31x7mm - TC Double Lip NBR Rubber Oil Seal with Garter Spring","description":"The TC10x31x7 is a double-lip rotary shaft seal, block out dirt \u0026amp; lock in grease or oil. \u003cbr\u003e✔️ Designed for a shaft diameter of 10mm Width 7mm, with a bore diameter 31mm Nitrile Rubber Lip Material.\u003cbr\u003e \u003cbr\u003e✅ Item Sku : TC10x31x7\n\u003cbr\u003e✅ Type : Oil and Grease Seal TC 10x31x7 mm \u003cbr\u003e✅ Shaft diameter (inner): 10mm\n\u003cbr\u003e✅ Housing bore (outer): 31mm\n\u003cbr\u003e✅ Width : 7mm\n\u003cbr\u003e✅ Size : 10mm x 31mm x 7mm\n\u003cbr\u003e✅ Oil and Grease Seal Material : Nitrile Butadiene Rubber\n\u003cbr\u003e✅ Temperature Range : -40° to 248°F\n\u003cbr\u003e✅ Ideal for both rotary and static sealing applications \u003cbr\u003e✅ Pack size: 1 seal","brand":"AVX","offers":[{"title":"Default Title","offer_id":43552818528491,"sku":"TC10x31x7","price":14.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0662\/3268\/0683\/files\/oil-and-grease-seal-tc10x31x7-rubber-covered-double-lip-wgarter-spring-vxb-ball-bearings.jpg?v=1770442605"},{"product_id":"mr3121-5-full-ceramic-bearing-21-5x31x7","title":"Full Ceramic Bearing 21.5x31x7mm With 21.5mm Inner Bore 6804 Modified Ceramic Ball Bearing For Industrial Machinery Precision Applications And High Speed Systems Such As Robotics CNC Automotive And Aerospace Components","description":"\u003cdiv\u003eFull Ceramic Bearing 21.5x31x7mm single unit\u003cbr\u003e\n✔️ ID 21.5mm, OD 31mm, width 7mm; zirconia ceramic, PTFE cage \u003cp\u003eThese full ceramic bearings are high-performance parts designed for precision machines, robotics, linear slide units, medical equipment, and demanding environments where non-magnetic, corrosion-resistant components matter. The 21.5mm ID bore, 31mm outer diameter, and 7mm width fit standard metric housings used in CNC gear and industrial equipment.\u003c\/p\u003e ✅ Inner diameter 21.5 mm; outer diameter 31 mm; width 7 mm\u003cbr\u003e\n✅ Material: Zirconia ceramic races and balls, PTFE cage\u003cbr\u003e\n✅ Type: Full ceramic bearing, 6804 modified ball bearing\u003cbr\u003e\n✅ Package: 1 bearing per order\u003cbr\u003e \u003cp\u003e💡 What is a full ceramic bearing used for in precision machinery and why choose zirconia?\nA handy, high-performance option for demanding environments:\n- High-speed, low-friction operation\n- Excellent chemical and corrosion resistance\n- Lightweight, non-magnetic construction\n- Long service life in challenging settings\u003c\/p\u003e \u003c\/div\u003e","brand":"VXB","offers":[{"title":"Default Title","offer_id":43555179233515,"sku":"Kit7757","price":49.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0662\/3268\/0683\/files\/mr3121-5-full-ceramic-bearing-21-5x31x7-vxb-ball-bearings.jpg?v=1770442644"},{"product_id":"kt253113-needle-bearing-cage-25x31x13mm-k2531","title":"KT253113 - Needle Roller Bearing Cage - 25x31x13mm K253113","description":"KT253113 Needle Bearing Cage K25x31x13\u003cbr\u003e\u003ccenter\u003e\n\u003ctable cellspacing=\"2\" cellpadding=\"10\" bg=\"\" border=\"1\"\u003e\u003ctbody\u003e\u003ctr\u003e\u003ctd align=\"Center\"\u003e\u003cfont face=\"Tahoma\" size=\"+2\"\u003eKT253113 Needle Cages Bearing\u003cbr\u003eOne Bearing\u003c\/font\u003e\u003c\/td\u003e\u003c\/tr\u003e\u003c\/tbody\u003e\u003c\/table\u003e\n\u003cbr\u003e\u003cbr\u003e\u003ctable cellspacing=\"2\" cellpadding=\"5\" bg=\"\" border=\"0\"\u003e\u003ctbody\u003e\u003ctr\u003e\n\u003ctd\u003e\u003ctable cellspacing=\"2\" cellpadding=\"5\" bg=\"\" border=\"0\"\u003e\u003ctbody\u003e\n\u003ctr\u003e\u003ctd valign=\"center\" align=\"center\"\u003e\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd valign=\"center\" align=\"center\"\u003e\u003c\/td\u003e\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\u003c\/td\u003e\n\u003ctd valign=\"top\" align=\"left\"\u003e\u003cfont face=\"tahoma\"\u003e\u003cp align=\"justify\"\u003eKT253113 Needle Cages Bearing inner diameter is 25mm, Bearing outer diameter is 31mm and Bearing width is 13mm.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eKT253113 Ball Bearings\u003c\/li\u003e\n\u003cli\u003eNeedle Roller Cage Bearing\u003c\/li\u003e\n\u003cli\u003eSize: 25mm x 31mm x 13mm\u003c\/li\u003e\n\u003cli\u003eBearing Inner Diameter: 25mm\u003c\/li\u003e\n\u003cli\u003eBearing Outer Diameter: 31mm\u003c\/li\u003e\n\u003cli\u003eBearing Width: 13mm\u003c\/li\u003e\n\u003cli\u003eDynamic load rating Cr: 18400\u003c\/li\u003e\n\u003cli\u003eStatic load rating Cor: 14300\u003c\/li\u003e\n\u003cli\u003eQuantity: 1 Bearing\u003c\/li\u003e\n\u003c\/ul\u003e\u003c\/font\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\u003c\/tbody\u003e\u003c\/table\u003e\n\u003c\/center\u003e\u003cbr\u003e\u003cbr\u003e\u003cbr\u003eThe KT253113 Needle Roller Bearing Cage 25x31x13mm K253113 is designed for compact, high-load applications where space and performance matter. this bearing is ideal for use in gearboxes, transmissions, and other precision mechanical systems. Engineered for efficiency and durability, features a needle roller cage design that reduces friction and distributes load evenly - perfect for tight spaces with high radial forces, an ideal needle cage bearing for high-performance, space-sensitive applications.\u003cbr\u003e OldFormat","brand":"VXB","offers":[{"title":"Default Title","offer_id":43579750220011,"sku":"KT253113","price":9.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0662\/3268\/0683\/files\/kt253113-needle-bearing-cage-25x31x13mm-k253113-vxb-ball-bearings-1-32679949566187.jpg?v=1771164538"},{"product_id":"kt253116-needle-bearing-cage-25x31x16mm-k2531","title":"KT253116 - Needle Roller Bearing Cage - 25x31x16mm K253116","description":"KT253116 Needle Bearing Cage K25x31x16\u003cbr\u003e\u003ccenter\u003e\n\u003ctable cellspacing=\"2\" cellpadding=\"10\" bg=\"\" border=\"1\"\u003e\u003ctbody\u003e\u003ctr\u003e\u003ctd align=\"Center\"\u003e\u003cfont face=\"Tahoma\" size=\"+2\"\u003eKT253116 Needle Cages Bearing\u003cbr\u003eOne Bearing\u003c\/font\u003e\u003c\/td\u003e\u003c\/tr\u003e\u003c\/tbody\u003e\u003c\/table\u003e\n\u003cbr\u003e\u003cbr\u003e\u003ctable cellspacing=\"2\" cellpadding=\"5\" bg=\"\" border=\"0\"\u003e\u003ctbody\u003e\u003ctr\u003e\n\u003ctd\u003e\u003ctable cellspacing=\"2\" cellpadding=\"5\" bg=\"\" border=\"0\"\u003e\u003ctbody\u003e\n\u003ctr\u003e\u003ctd valign=\"center\" align=\"center\"\u003e\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd valign=\"center\" align=\"center\"\u003e\u003c\/td\u003e\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\u003c\/td\u003e\n\u003ctd valign=\"top\" align=\"left\"\u003e\u003cfont face=\"tahoma\"\u003e\u003cp align=\"justify\"\u003eKT253116 Needle Cages Bearing inner diameter is 25mm, Bearing outer diameter is 31mm and Bearing width is 16mm.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eKT253116 Ball Bearings\u003c\/li\u003e\n\u003cli\u003eNeedle Roller Cage Bearing\u003c\/li\u003e\n\u003cli\u003eSize: 25mm x 31mm x 16mm\u003c\/li\u003e\n\u003cli\u003eBearing Inner Diameter: 25mm\u003c\/li\u003e\n\u003cli\u003eBearing Outer Diameter: 31mm\u003c\/li\u003e\n\u003cli\u003eBearing Width: 16mm\u003c\/li\u003e\n\u003cli\u003eDynamic load rating Cr: 24400\u003c\/li\u003e\n\u003cli\u003eStatic load rating Cor: 17800\u003c\/li\u003e\n\u003cli\u003eQuantity: 1 Bearing\u003c\/li\u003e\n\u003c\/ul\u003e\u003c\/font\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\u003c\/tbody\u003e\u003c\/table\u003e\n\u003c\/center\u003e\u003cbr\u003e\u003cbr\u003e\u003cbr\u003eThe KT253116 Needle Roller Bearing Cage 25x31x16mm K253116 is designed for compact, high-load applications where space and performance matter. this bearing is ideal for use in gearboxes, transmissions, and other precision mechanical systems. Engineered for efficiency and durability, features a needle roller cage design that reduces friction and distributes load evenly - perfect for tight spaces with high radial forces, an ideal needle cage bearing for high-performance, space-sensitive applications.\u003cbr\u003e OldFormat","brand":"VXB","offers":[{"title":"Default Title","offer_id":43579750318315,"sku":"KT253116","price":9.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0662\/3268\/0683\/files\/kt253116-needle-bearing-cage-25x31x16mm-k253116-vxb-ball-bearings-1-32679949631723.jpg?v=1771164531"},{"product_id":"kt253117-needle-bearing-cage-25x31x17mm-k253117","title":"KT253117 - Needle Roller Bearing Cage - 25x31x17mm K253117","description":"\u003cp\u003eKT253117 Needle Roller Bearing Cage\u003cbr\u003e✔️ 25x31x17mm - High Load - Compact Design\u003c\/p\u003e\n\u003cp\u003eThe KT253117 needle roller cage bearing is built for precision and space-limited applications. With a 25mm inner diameter and a compact profile, it's ideal for gearboxes, transmissions, and mechanical systems needing high radial load support in tight spaces.\u003c\/p\u003e\n\u003cp\u003e✅ Size: 25mm ID x 31mm OD x 17mm Width\u003cbr\u003e✅ Type: Needle Roller Cage Bearing\u003cbr\u003e✅ Design: Lightweight cage with evenly spaced rollers\u003cbr\u003e✅ Dynamic Load Rating: 26,500 N\u003cbr\u003e✅ Static Load Rating: 19,000 N\u003cbr\u003e✅ Quantity: 1 Bearing\u003cbr\u003e✅ Also Known As: K25x31x17\u003c\/p\u003e\n\u003cp\u003e💡 What are the advantages of needle roller cage bearings?\u003c\/p\u003e\n\u003col\u003e\n\u003cli\u003e\n\u003cp\u003eThey offer a high load-carrying capacity with a minimal cross-section.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eThe cage design reduces friction while keeping rollers precisely spaced.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eCommonly used in transmissions, gear trains, and rotating assemblies where radial space is tight.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003cp\u003ePerfect for high-performance applications where strength, efficiency, and compactness are key.\u003c\/p\u003e","brand":"VXB","offers":[{"title":"Default Title","offer_id":43579750482155,"sku":"KT253117","price":9.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0662\/3268\/0683\/files\/kt253117-needle-bearing-cage-25x31x17mm-k253117-vxb-ball-bearings-1-32679949664491.jpg?v=1773285506"},{"product_id":"kt253120-needle-bearing-cage-25x31x20mm-k253120","title":"KT253120 - Needle Roller Bearing Cage - 25x31x20mm K253120","description":"\u003cp\u003eKT253120 Needle Roller Bearing Cage\u003cbr\u003e✔️ K25x31x20 High Load Bearing\u003c\/p\u003e\n\u003cp\u003eThe KT253120 needle roller bearing cage is made for tight spaces where heavy radial loads need reliable support. It’s often used in transmissions, gearboxes, and precision machinery where durability and smooth operation are essential.\u003c\/p\u003e\n\u003cp\u003e✅ Inner diameter: 25mm\u003cbr\u003e✅ Outer diameter: 31mm\u003cbr\u003e✅ Width: 20mm\u003cbr\u003e✅ Dynamic load rating (Cr): 30500\u003cbr\u003e✅ Static load rating (Cor): 21200\u003cbr\u003e✅ Pack size: one bearing\u003c\/p\u003e\n\u003cp\u003e💡 What makes needle roller cages a strong choice for compact machinery?\u003cbr\u003eThey provide high strength and efficiency while saving space.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003eEngineered to handle large radial loads without bulk\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eLoad is evenly distributed across rollers for longer service life\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eLower friction improves performance and reduces heat buildup\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThis KT253120 bearing is a handy solution when you need compact strength and smooth reliability, grab one now and keep your machines running strong.\u003c\/p\u003e","brand":"VXB","offers":[{"title":"Default Title","offer_id":43579750613227,"sku":"KT253120","price":9.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0662\/3268\/0683\/files\/kt253120-needle-bearing-cage-25x31x20mm-k253120-vxb-ball-bearings-1-32679950909675.jpg?v=1773285495"},{"product_id":"19x31x7-non-standard-ball-bearing-19mm-x-31mm","title":"Non Standard Ball Bearing 19mm X 31mm X 7mm Flanged Bearing With Double Sealed Rubber Seals Inner Diameter 19mm Outer Diameter 31mm Thickness 7mm Special Size Bearing For Precision Machinery Automotive And Conveyor Applications Durable Construction","description":"\u003cdiv\u003eSpecial 19x31x7 Flanged Ball Bearing, 19mm ID\u003cbr\u003e\n✔️ Single 19x31x7 mm flanged bearing with 19mm ID \u0026amp; 37mm flange \u003cp\u003eThis compact, non-standard ball bearing fits a 19 mm inner diameter and 31 mm outer diameter with a 7 mm thickness. It's designed for tight spaces where standard sizes won't fit, making it a solid choice for robotics, small conveyors, and DIY CNC setups.\u003c\/p\u003e \u003cp\u003e✅ Inner diameter: 19 mm \u003cbr\u003e\n✅ Outer diameter: 31 mm \u003cbr\u003e\n✅ Thickness: 7 mm \u003cbr\u003e\n✅ Flange diameter: 37 mm \u003cbr\u003e\n✅ Double sealed with rubber seals \u003cbr\u003e\n✅ Flanged bearing type, special size \u003cbr\u003e\n✅ Quantity: 1 bearing \u003cbr\u003e\u003c\/p\u003e \u003cp\u003e💡 What is a small flanged ball bearing used for in compact machinery? This handy part provides reliable shaft support and protection in tight spaces where standard bearings don't fit.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e19x31x7 mm size fits compact shafts\u003c\/li\u003e\n\u003cli\u003eDouble rubber seals protect against dust and moisture\u003c\/li\u003e\n\u003cli\u003eIdeal for robotics, hobby CNC, and compact conveyors\u003c\/li\u003e\n\u003c\/ul\u003e \u003c\/div\u003e","brand":"VXB","offers":[{"title":"Default Title","offer_id":43581860118763,"sku":"19X31X7-BEARING","price":39.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0662\/3268\/0683\/files\/19x31x7-non-standard-ball-bearing-19mm-x-31mm-x-7mm-vxb-ball-bearings-1-32680607613163.jpg?v=1770446268"}],"url":"https:\/\/vxb.com\/collections\/outer-diameter-31mm.oembed","provider":"VXB Bearings","version":"1.0","type":"link"}