20 Pack Full Ceramic 685 Si3N4 Miniature Ball Bearings 5x11x5mm Set Ideal For Precision Machinery And Craft Projects 5mm Inner Diameter 11mm Outer Diameter 5mm Width With PTFE Cage For Low Friction And High Temperature Performance

20-Pack Full Ceramic 685 Miniature Bearings 5x11x5mm
✔️ 5x11x5mm, Si3N4 full ceramic bearings, 20 pcs pack

These tiny, high-purity ceramic bearings use Si3N4 balls and races with a PTFE cage, designed for precise, low-friction rotation in hobby machines, micro projects, and light robotics.

✅ Inner diameter: 5 mm
✅ Outer diameter: 11 mm
✅ Width: 5 mm
✅ Ball material: Si3N4 ceramic
✅ Cage material: PTFE
✅ Bearing type: 685 full ceramic miniature
✅ Pack quantity: 20 bearings

💡 What is the best use case for ceramic miniature bearings in precision gear setups?

Handy for compact, precision builds where low friction and corrosion resistance matter.

- compact precision bearings for micro-robotics and RC builds
- low friction, corrosion resistance in humid environments
- long service life in dry or cleanroom-like setups