{"product_id":"11-5x21x5-full-ceramic-silicon-nitride-bearin","title":"11.5x21x5 Full Ceramic Silicon Nitride Bearing With PTFE Cage 11.5mm Inner Diameter 21mm Outer Diameter 5mm Width High Precision Ceramic Ball Bearing For High Speed Low Friction And Corrosion Resistance","description":"\u003cdiv\u003eHigh purity 11.5x21x5 full ceramic silicon nitride bearing\u003cbr\u003e\n✔️ Inner 11.5mm, outer 21mm, width 5mm; Si3N4 ceramic, PTFE cage \u003cp\u003eThis full ceramic bearing uses silicon nitride (Si3N4) for both the balls and races, with a PTFE cage to minimize friction. It’s built for high-speed, dry-running operation in demanding robotics, aerospace, medical devices, and high-temperature assemblies where metal bearings risk corrosion or seizure.\u003c\/p\u003e \u003cp\u003e✅ Size: 11.5mm ID, 21mm OD, 5mm width\u003cbr\u003e✅ Material: Si3N4 ceramic balls and races\u003cbr\u003e✅ Cage: PTFE for low friction and chemical resistance\u003cbr\u003e✅ Package: 1 bearing\u003cbr\u003e\u003c\/p\u003e \u003cp\u003e💡 What is a full ceramic silicon nitride bearing used for in high-precision machinery? This handy question helps buyers understand why ceramic bearings matter in precision motion systems.\n- High stiffness and low weight support precise positioning\n- Excellent thermal stability and corrosion resistance for harsh environments\n- Low friction operation reduces wear and heat in high-speed runs\n- Chemical inertness minimizes contamination in clean-room setups\u003c\/p\u003e\n\u003c\/div\u003e","brand":"VXB","offers":[{"title":"Default Title","offer_id":43555153936619,"sku":"Kit7389","price":49.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0662\/3268\/0683\/files\/1_75423ad4-9dd2-4469-bd6a-384847973c7a.jpg?v=1770442669","url":"https:\/\/vxb.com\/products\/11-5x21x5-full-ceramic-silicon-nitride-bearin","provider":"VXB Bearings","version":"1.0","type":"link"}