20-Pack 638-2RS Full Ceramic Si3N4 Bearings 8x28x9mm Miniature
UPC: 00193019195413
Inner/outer races: Si3N4 Ceramic (Silicon Nitride)
Cage: PTFE
Balls: Si3N4 Ceramic (Silicon Nitride)
Delivery in 30-45 days
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
💡 Why use full ceramic bearings in advanced applications?
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Si3N4 ceramic is lighter, harder, and runs cooler than steel.
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Corrosion-proof and non-magnetic - ideal for medical and cleanroom settings.
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Handles higher speeds and extreme temps with minimal wear.
These bearings offer ultra-low friction and long-lasting durability for cutting-edge machines and demanding environments.