| d | 8mm | single row, stainless steel, with flanged outer ring |
| D | 16mm | Deep groove ball bearings |
| D3 | 18mm | Principal dimensions |
| C | 1,12kN dynamic | Basic load ratings |
| Co | 0,55kN static | static|Basic load ratings |
| Speed | 90000r/min | Reference Speed ratings |
| Speed | 45000r/min | Limiting Speed ratings |
| Bearing | W 638/8-2ZR | Designations |
| Speed: | 45000r/min | Limiting Speed ratings |
| Bearing: | W 638/8-2ZR | Designations |
| C: | 1,12kN dynamic | Basic load ratings |
| Speed: | 90000r/min | Reference Speed ratings |
| Pu: | 0,024kN | limit Fatigue |
| Co: | 0,55kN static | static|Basic load ratings |
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