W638/4X-2Z SKF 4x10x4mm Limiting speed 63000 r/min Deep groove ball bearings
| Bearing number | W638/4X-2Z |
| Size (mm) | 4x10x4 |
| Brand | SKF |
| Bore Diameter (mm) | 4 |
| Outer Diameter (mm) | 10 |
| Width (mm) | 4 |
| d | 4 mm |
| D | 10 mm |
| B | 4 mm |
| C | 4 mm |
| d1 | 5.9 mm |
| d2 | – mm |
| r1 min. | 5.6 mm |
| r2 min. | 5.6 mm |
| D1 | 8.8 mm |
| D2 | 0.2 mm |
| da min. | 5.8 mm |
| Da max. | 8.8 mm |
| ra max. | 0.2 mm |
| Weight | 0.0013 Kg |
| Basic dynamic load rating (C) | 0.637 kN |
| Basic static load rating (C0) | 0.25 kN |
| Fatigue load limit (Pu) | 0.011 |
| Reference speed | 130000 r/min |
| Limiting speed | 63000 r/min |
| Calculation factor (f0) | 12 |
Detailed Parameters
parameter：
| 68/950/1200 Deep groove ball bearings | Width :90.000mm ，Brand:NTN ，Size :950x1200x90mm ，Outer Diameter :1200.000mm ，Bore Diameter :950.000mm |
| K55x60x17 Needle roller bearings | Size :55x60x17mm ，Outer Diameter :60mm ，Bore Diameter :55mm ，Brand:ISO |
| 6301 Deep groove ball bearings | Brand:ISB ，Bore Diameter :12mm ，Outer Diameter :37mm ，Size :12x37x12mm |
| T-96900/96140 Tapered roller bearings | Brand:NTN ，d:228.6 mm ，Width :68.262mm ，Outer Diameter :355.6mm ，Size :228.6x355.6x68.262mm ，Bore Diameter :228.6mm |
| NN3010 Cylindrical roller bearings | Bore Diameter :50mm ，Size :50x80x23mm ，Outer Diameter :80mm ，Brand:ISO |
| 23028 KCW33+H3028 Spherical roller bearings | Outer Diameter :210mm ，Brand:CX ，Bore Diameter :140mm ，Size :140x210x53mm |
| JHM720249/JHM720210 Tapered roller bearings | Outer Diameter :160mm ，Brand:KOYO ，Size :100x160x41mm ，Bore Diameter :100mm |
| 30208JA1HLbh Tapered roller bearings | Outer Diameter :80mm ，Size :42x80x22.5mm ，Bore Diameter :42mm ，Brand:KBC ，Width :22.5mm |
| 23230-E1-K-TVPB + AHX3230G Spherical roller bearings | Size :145x270x96mm ，Bore Diameter :145mm ，Width :96mm ，Outer Diameter :270mm ，Brand:FAG |
| BK4020 Cylindrical roller bearings | Size :40x47x20mm ，Outer Diameter :47mm ，Brand:ISO ，Bore Diameter :40mm |
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