| Name | Value |
|---|---|
| Bearing number | W638/4-2Z |
| Size (mm) | 4x9x4 |
| Brand | MBY |
| Bore Diameter (mm) | 4 |
| Outer Diameter (mm) | 9 |
| Width (mm) | 4 |
| Name | Value |
|---|---|
| d | 4 mm |
| D | 9 mm |
| B | 4 mm |
| C | 4 mm |
| d1 | 5,2 mm |
| d2 | – mm |
| r1 min. | 4,8 mm |
| r2 min. | 4,8 mm |
| D1 | 8,1 mm |
| D2 | 0,1 mm |
| da min. | 5,1 mm |
| Da max. | 8,2 mm |
| ra max. | 0,1 mm |
| Weight | 0,0009 Kg |
| Basic dynamic load rating (C) | 0,364 kN |
| Basic static load rating (C0) | 0,114 kN |
| Fatigue load limit (Pu) | 0,005 |
| Reference speed | 140000 r/min |
| Limiting speed | 70000 r/min |
| Calculation factor (f0) | 6,5 |
| Calculation factor (kr) | 0,02 |
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