{"product_id":"wholesale-638-2rs-full-ceramic-si3","title":"20-Pack 638-2RS Full Ceramic Si3N4 Bearings 8x28x9mm Miniature","description":"\u003cp\u003e638-2RS Full Ceramic Ball Bearings\u003cbr\u003e✔️ Si3N4 - 8mm ID - 28mm OD - 9mm Width\u003c\/p\u003e\n\u003cp\u003eThis 20-pack of 638-2RS full ceramic ball bearings is built with silicon nitride (Si3N4) for both the balls and races, delivering top-tier performance in corrosive, high-speed, or non-conductive environments. Commonly used in robotics, medical gear, and high-end industrial equipment.\u003c\/p\u003e\n\u003cp\u003e✅ Pack size: 20 bearings\u003cbr\u003e✅ Size: 8mm x 28mm x 9mm\u003cbr\u003e✅ Type: Deep groove full ceramic bearing\u003cbr\u003e✅ Balls: Silicon Nitride (Si3N4)\u003cbr\u003e✅ Races: Silicon Nitride (Si3N4)\u003cbr\u003e✅ Cage: PTFE (Teflon®-compatible)\u003cbr\u003e✅ Closures: Rubber seals on both sides\u003c\/p\u003e\n\u003cp\u003e💡 Why use full ceramic bearings in advanced applications?\u003c\/p\u003e\n\u003col\u003e\n\u003cli\u003e\n\u003cp\u003eSi3N4 ceramic is lighter, harder, and runs cooler than steel.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eCorrosion-proof and non-magnetic - ideal for medical and cleanroom settings.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eHandles higher speeds and extreme temps with minimal wear.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003cp\u003eThese bearings offer ultra-low friction and long-lasting durability for cutting-edge machines and demanding environments.\u003c\/p\u003e","brand":"VXB","offers":[{"title":"Default Title","offer_id":49313166524609,"sku":"FULL-638-2RS-SI3N4-PTFE-20","price":499.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0828\/0955\/3089\/files\/wholesale-638-2rs-full-ceramic-si3n4-bearing-8x28x9-miniature-pack-of-20-vxb-ball-bearings-32681019572459_36b8ab89-32cb-438a-8736-d18e28f590a0.jpg?v=1748647334","url":"https:\/\/smallbearings.com\/zh\/products\/wholesale-638-2rs-full-ceramic-si3","provider":"Small Bearings","version":"1.0","type":"link"}