{"product_id":"2-pcs-50mm-u-groove-nylon-ball-bearing-guide-pulley-wheels-roller-pulleys-for-lifting-for-6-8-10mm-rope-608zz-bearing-size-50mm2pcs","title":"2 PCS 50mm U Groove Nylon Ball Bearing Guide Pulley Wheels Roller Pulleys for Lifting for 6, 8,10mm Rope, 608zz Bearing - size: 50mm(2pcs)","description":"\u003ch3\u003eAbout this item\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eSTANDARDIZED DIMENSIONS: These U groove bearings are engineered to exact specifications — inner diameter 8mm, outer diameter 50mm, thickness 12mm, groove width 5mm, and groove depth 5mm — ensuring a snug fit on standard 6mm shafts without wobbling or play. Unlike generic pulley wheels with inconsistent tolerances, each bearing is manufactured to ABEC3 precision standards for accurate linear motion guidance. The standardized sizing means you can confidently replace worn pulleys in your existing track roller system without modifications.\u003c\/li\u003e\n\u003cli\u003eDUAL-MATERIAL CONSTRUCTION: The chrome steel ball bearing core (GCr15) delivers high hardness and exceptional wear resistance, while the nylon pulley outer ring reduces operating noise and protects contact surfaces from scratches. Unlike all-metal rollers that clang and wear down rails over time, this hybrid design combines the strength of bearing steel with the quiet smoothness of nylon. The result is a guide bearing that runs silently, resists corrosion, and outlasts ordinary plastic pulleys.\u003c\/li\u003e\n\u003cli\u003eDOUBLE-SHIELDED SEALS: Both sides of each U groove bearing are shielded to lock in factory lubricant and block dust, debris, and moisture from contaminating the internal ball bearing. This protective design means smoother operation over a longer service life with minimal maintenance. Whether installed in a dusty workshop environment or a humid garage, these sealed roller wheels maintain their smooth rolling action far longer than open-style bearings that collect grit and seize up.\u003c\/li\u003e\n\u003cli\u003eWide Application:These U groove pulley wheels adapt to a wide range of track and guide rail applications. Use them as sliding door pulleys for barn doors and glass partitions, as track rollers for 3D printer axes, or as guide bearings for conveyor systems and automated machinery. The U-type groove design fits securely on round, flat, and V-profile rails, making these wheels the go-to choice for furniture hardware, drawer slides, and household appliance repairs.\u003c\/li\u003e\n\u003cli\u003eSet of 2 pics !Product Size: 8mm(ID)*50mm(OD)*12mm(Thickness),Each wheel presses easily onto a 5mm shaft.CAPACITY: 40kg\/90lbs\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eOverview\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Preamer\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Metal, Plastic\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eItem dimensions L x W x H:\u003c\/strong\u003e 1.97 x 1.97 x 0.47 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eItem Weight:\u003c\/strong\u003e 20 g\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBearing Number:\u003c\/strong\u003e 608ZZ\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Preamer","offers":[{"title":"Default Title","offer_id":67614707646684,"sku":"B01HD4QJFK-size-50mm-2pcs","price":19.44,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0837\/0913\/3020\/files\/31cwkZmAV-L.jpg?v=1790857321","url":"https:\/\/stemora.us\/products\/2-pcs-50mm-u-groove-nylon-ball-bearing-guide-pulley-wheels-roller-pulleys-for-lifting-for-6-8-10mm-rope-608zz-bearing-size-50mm2pcs","provider":"Stemora","version":"1.0","type":"link"}