 W639/3-2RS1 SKF 3x8x4mm  Fatigue load limit (Pu) 0.004 Deep groove ball bearings
  W639/3-2RS1 SKF 3x8x4mm  Fatigue load limit (Pu) 0.004 Deep groove ball bearings
                                

| Bearing number | W639/3-2RS1 | 
| Size (mm) | 3x8x4 | 
| Brand | SKF | 
| Bore Diameter (mm) | 3 | 
| Outer Diameter (mm) | 8 | 
| Width (mm) | 4 | 
| d | 3 mm | 
| D | 8 mm | 
| B | 4 mm | 
| C | 4 mm | 
| d1 | 4.3 mm | 
| d2 | – mm | 
| r1 min. | 4.2 mm | 
| r2 min. | 4.2 mm | 
| D1 | 7.3 mm | 
| D2 | 0.15 mm | 
| da min. | 4.3 mm | 
| Da max. | 7.3 mm | 
| ra max. | 0.15 mm | 
| Weight | 0.00083 Kg | 
| Basic dynamic load rating (C) | 0.319 kN | 
| Basic static load rating (C0) | 0.09 kN | 
| Fatigue load limit (Pu) | 0.004 | 
| Reference speed | – r/min | 
| Limiting speed | 43000 r/min | 
| Calculation factor (f0) | 6.1 | 
 Detailed  Parameters
  Detailed  Parameters
                                     parameter:
  parameter:
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