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61905-2RS Hybrid Ceramic Ball Bearing 25x42x9 Sealed Si3N4 Bearing
61905-2RS Hybrid Ceramic Ball Bearing C3 Clearance
✔️ Chrome-steel races with Si3N4 ceramic balls for smooth, long-life rotation
This 61905-2RS hybrid ceramic bearing pairs chrome-steel rings with Si3N4 ceramic balls, giving you a handy upgrade for high-speed, low-friction motion. It’s double-sealed to keep out dust and comes pre-greased for easy installation in electric motors, mechanical systems, and commercial equipment.
✅ Hybrid ceramic deep groove ball bearing
✅ Chrome steel races with Si3N4 ceramic balls
✅ Double rubber seals (2RS)
✅ Nylon cage
✅ Electric-motor-quality build
✅ Radial clearance: C3
✅ Inner diameter 25mm
✅ Outer diameter 42mm
✅ Width 9mm
✅ Size 25mm x 42mm x 9mm
✅ Quantity: 1 bearing
✅ Equivalents: 61905-2RS1, 61905RS1
Dimensions Table (mm)
| ID | OD | Width | Balls | Seals | Clearance |
|---|---|---|---|---|---|
| 25 | 42 | 9 | Si3N4 ceramic | Double rubber seals | C3 |
💡 Why choose a hybrid ceramic bearing for high-speed or precision setups?
The ceramic balls cut friction and heat, helping the bearing spin faster and last longer than all-steel bearings.
- Lower rolling resistance improves efficiency
- Ceramic balls resist wear, moisture, and corrosion
- C3 clearance helps handle thermal expansion at high RPM
- Handy for motors, spindles, robotics, and performance builds
A smooth-running hybrid bearing that keeps your high-speed equipment cool, clean, and reliable.