Pack Of 25 Full Ceramic Si3N4 Miniature Ball Bearings 689-2RS Sealed 9x17x5mm High Precision Low Friction Bearings For Micro Machinery Robotics Hobby Projects And CNC Components Suitable For Precision Micro Devices And Hobbyists Requiring Ceramic Bearings
✔️ 9x17x5mm full ceramic bearing, sealed, PTFE cage, 25 pcs
These compact miniature bearings are full ceramic units designed with Si3N4 balls and races, offering high rigidity, corrosion resistance, and low friction. They’re ideal for precision devices, hobby robotics, and micro-mechanisms where reliability matters.
✅ Dimensions: inner diameter 9 mm, outer diameter 17 mm, width 5 mm (9x17x5 mm)
✅ Sealed full ceramic bearing with two rubber shields (2RS) and Si3N4 components
✅ Cage material: PTFE for smooth operation
✅ Pack size: 25 bearings in this wholesale lot
💡 What is a ceramic ball bearing used for in precision miniature applications? Ceramic bearings are handy in precision gadgetry and high-speed environments where weight matters and metal wear is a concern. - Handy in small robotics and hobby projects - Great for high-speed, low-maintenance operation in tight spaces - Ideal where chemical resistance and heat tolerance are needed - Useful in lab instruments and micro-mechanics