Ceramic Ball Bearing 634-2RS Zirconia ZrO2 Sealed Miniature 4X16X5 mm Precision Bearing for High Temperature, Low Friction Operation, Corrosion Resistant and Long Lasting, Ideal for Industrial, Medical, Optical and Precision Equipment

This compact, sealed ceramic bearing is a precision solution for high-speed, low-wear applications in robotics, medical devices, and CNC machinery. Its zirconia balls, PTFE cage, and ceramic races deliver remarkable rigidity and longevity in demanding environments.

✅ Inner diameter 4 mm
✅ Outer diameter 16 mm
✅ Width 5 mm
✅ Ceramic zirconia balls and zirconia races
✅ PTFE cage and PTFE closures
✅ Sealed on both sides (2RS style)
✅ 1 bearing per pack

💡 What are ceramic bearings used for in high-precision machinery and why choose zirconia? This handy Q&A explains typical use cases and benefits.
- Low friction at high speeds improves efficiency
- High wear resistance reduces maintenance and downtime
- Non-magnetic, corrosion resistant for clean room or medical settings
- Lightweight and rigid for improved accuracy