20 Pack 6904-2RS Full Ceramic Si3N4 Ball Bearing 20x37x9mm Sealed Precision Ceramic Bearings For Industrial And Commercial Use, 20mm Bore, 37mm Outer Diameter, 9mm Width, Pack Of 20
✔️ Pack of 20, Si3N4 ceramic balls, PTFE cage, 20x37x9mm
These are full ceramic ball bearings made from silicon nitride (Si3N4), built for high-speed, non-magnetic, and corrosion-resistant performance across industrial machinery, robotics, and precision equipment.
✅ Inner diameter: 20 mm
✅ Outer diameter: 37 mm
✅ Width: 9 mm
✅ Material: Si3N4 ceramic
✅ Cage: PTFE
✅ Seals: 2RS (sealed) for dust protection
✅ Pack size: 20 bearings per pack
💡 What is a ceramic sealed bearing used for in precision machinery? Handy for high-speed, non-magnetic operation. - High-temperature tolerance and non-magnetic properties suit medical, aerospace, and robotics
- Low friction and long wear life support continuous, reliable performance
- Non-contaminating materials make it ideal for cleanroom, pharma, and food-grade setups
- PTFE cage and ceramic balls reduce wear and corrosion in harsh environments