Bearings, units and housings -- Ball bearings -- Deep groove ball bearings -- Deep groove ball bearings -- SKF W 638/3-2Z
W 638/3-2Z
Dimensions
| d | 3 | mm | |
| D | 7 | mm | |
| B | 3 | mm | |
| d2 | ≈ | 3.85 | mm |
| D2 | ≈ | 6.35 | mm |
| r1,2 | min. | 0.1 | mm |
Abutment dimensions
| da | min. | 3.7 | mm |
| da | max. | 3.8 | mm |
| Da | max. | 6.5 | mm |
| ra | max. | 0.1 | mm |
Calculation data
| Basic dynamic load rating | C | 0.178 | kN | |
| Basic static load rating | C0 | 0.057 | kN | |
| Fatigue load limit | Pu | 0.002 | kN | |
| Reference speed | 160000 | r/min | ||
| Limiting speed | 80000 | r/min | ||
| Calculation factor | kr | 0.02 | ||
| Calculation factor | f0 | 7.1 |
Mass
| Mass bearing | 0.00041 | kg |