30-Pack Full Ceramic 688-2RS Miniature Ball Bearings 8x16x4mm ZrO2 Sealed Dual Rubber Bearings for Precision Machinery and Hobby Projects with PTFE Cage Ideal For High-Precision RC Models Tiny Gearboxes Drones Robotic Joints and Laboratory Instrumentation

30-Pack Full Ceramic Miniature Ball Bearings 8x16x4mm
✔️ 30 pcs, 8x16x4 mm, full ceramic 688-2RS with PTFE cage

These are high-precision full ceramic miniature bearings featuring zirconia ceramic balls, zirconia races, and a PTFE cage. They’re ideal for sealed ball bearing applications in precision instruments, robotics, medical devices, and hobby projects where low friction and corrosion resistance matter.

✅ Inner diameter: 8 mm
✅ Outer diameter: 16 mm
✅ Width: 4 mm
✅ Ball material: Zirconia (ZrO2)
✅ Races: Zirconia (ZrO2)
✅ Cage: PTFE
✅ Pack size: 30 bearings

💡 What is a ceramic ball bearing and where should you use it?

Ceramic bearings excel in tough environments where speed, wear resistance, and corrosion resistance matter. - long-life, low-wear ceramic bearings for high-speed applications - zirconia ball bearings deliver corrosion resistance and low friction - sealed 688-2RS variants reduce contamination for clean environments - ideal for precision instruments, lab robotics, and outdoor gear