20-Pack 638-2RS Full Ceramic Si3N4 Bearings 8x28x9mm Miniature

638-2RS Full Ceramic Ball Bearings
✨ Si3N4 - 8mm ID - 28mm OD - 9mm Width

This 20-pack of 638-2RS full ceramic ball bearings is built with silicon nitride (Si3N4) for both the balls and races, delivering top-tier performance in corrosive, high-speed, or non-conductive environments. Commonly used in robotics, medical gear, and high-end industrial equipment.

🟢 Pack size: 20 bearings
🟢 Size: 8mm x 28mm x 9mm
🟢 Type: Deep groove full ceramic bearing
🟢 Balls: Silicon Nitride (Si3N4)
🟢 Races: Silicon Nitride (Si3N4)
🟢 Cage: PTFE
🟢 Closures: Rubber seals on both sides