Full Ceramic Ball Bearing 4x8x2 ZrO2 Miniature With PTFE Cage And Ceramic Balls For Precision Use, Inner Diameter 4 Mm, Outer Diameter 8 Mm, Width 2 Mm, High Hardness, Low Friction, Suitable For Micro Machines

Single 4x8x2 mm full ceramic ball bearing, Zirconia mini
✔️ ID 4mm, OD 8mm, W 2mm; PTFE cage, ZrO2 balls

This compact full ceramic bearing uses zirconia balls with a PTFE cage, delivering smooth motion in tight spaces. Typical applications include micro robotics, precision instruments, small actuation assemblies, and hobby electronics where accurate, clean operation matters.

✅ Inner diameter: 4 mm
✅ Outer diameter: 8 mm
✅ Width: 2 mm
✅ Cage material: PTFE (Polytetrafluoroethylene)
✅ Balls: Zirconia ceramic (ZrO₂)
✅ Races: Zirconia ceramic (ZrO₂)

💡 What is a ceramic ball bearing used for in small, precision machinery?

Ceramics provide high hardness, low wear, and non-magnetic properties that really help in tight, delicate setups. - Handy for micro-robotics and precision instruments where non-magnetic parts help accuracy - Lightweight and corrosion resistant for extended life in harsh apps - Low friction contributes to smooth, quiet operation in tiny drives - Zirconia ceramic balls reduce wear and extend service life