| Name | Value |
|---|---|
| Bearing number | W 638 |
| Size (mm) | 8x28x9 |
| Brand | MBY |
| Bore Diameter (mm) | 8 |
| Outer Diameter (mm) | 28 |
| Width (mm) | 9 |
| Name | Value |
|---|---|
| d | 8 mm |
| D | 28 mm |
| B | 9 mm |
| d2 | - 13.9 mm |
| D2 | - 22.38 mm |
| r1,2 | min. - 0.3 mm |
| da | min. - 10 mm |
| da | max. - 13.8 mm |
| Da | max. - 26 mm |
| ra | max. - 0.3 mm |
| Basic dynamic load rating | C - 4 kN |
| Basic static load rating | C0 - 2 kN |
| Fatigue load limit | Pu - 0.083 kN |
| Reference speed | 67000 r/min |
| Limiting speed | 40000 r/min |
| Calculation factor | kr - 0.035 |
| Calculation factor | f0 - 12.4 |
| Mass bearing | 0.0273 kg |
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