638/4-2Z
Precision ball bearing > Deep groove ball bearing
638/4-2Z - Deep groove ball bearing - Precision ball bearing
| Product model | 638/4-2Z |
|---|---|
| d | 4 mm |
| D | 9 mm |
| B | 4 mm |
| Limiting speed | 60000 r/min |
| d1 | ≈5.2 mm |
| D2 | ≈8.1 mm |
| Chamfer size (r1,2) | min.0.1 mm |
| da | min.4.6 mm/max.5.1 mm |
| Da | max.8.4 mm |
| ra | max.0.1 mm |
| Pu | 0.005 kN |
| Reference speed(r/min) | 140 000 r/min |
| kr | 0.015 |
| f0 | 6.5 |
| Radial runout | 0.005 kg |
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638/4-2Z / Deep groove ball bearing / Precision ball bearing