W638/2X-2Z SKF 2x5x2.5mm Calculation factor (f0) 6.5 Deep groove ball bearings
| Bearing number | W638/2X-2Z |
| Size (mm) | 2x5x2.5 |
| Brand | SKF |
| Bore Diameter (mm) | 2 |
| Outer Diameter (mm) | 5 |
| Width (mm) | 2.5 |
| d | 2 mm |
| D | 5 mm |
| B | 2.5 mm |
| C | 2.5 mm |
| d1 | 2.7 mm |
| d2 | – mm |
| r1 min. | 2.6 mm |
| r2 min. | 2.6 mm |
| D1 | 4.4 mm |
| D2 | 0.1 mm |
| da min. | 2.6 mm |
| Da max. | 4.5 mm |
| ra max. | 0.1 mm |
| Weight | 0.0002 Kg |
| Basic dynamic load rating (C) | 0.094 kN |
| Basic static load rating (C0) | 0.025 kN |
| Fatigue load limit (Pu) | 0.001 |
| Reference speed | 200000 r/min |
| Limiting speed | 100000 r/min |
| Calculation factor (f0) | 6.5 |
Detailed Parameters
parameter：
| BHTM1420 Needle roller bearings | Size :14x22x20mm ，Outer Diameter :22mm ，Brand:KOYO ，Bore Diameter :14mm |
| 54207U+U207 Thrust ball bearings | D1:65 mm ，D2:48 mm ，Bore Diameter :37mm ，d:37 mm ，d1:30 mm ，Brand:CX |
| 74550A/74850 Tapered roller bearings | Brand:KOYO ，Size :139.7x215.9x47.625mm ，Bore Diameter :139.7mm ，Outer Diameter :215.9mm |
| RNA5908 Needle roller bearings | Brand:CX ，Outer Diameter :62mm ，Width :30mm ，Size :48x62x30mm ，Bore Diameter :48mm |
| F604 Deep groove ball bearings | Size :4x12x4mm ，Width :4mm ，Brand:ISO ，Bore Diameter :4mm ，Outer Diameter :12mm |
| AXW 17 Needle roller bearings | Size :17x23x3.2mm ，Bore Diameter :17mm ，Outer Diameter :23mm ，d:17 mm ，Width :3.2mm ，Brand:NBS |
| NUP2315 Cylindrical roller bearings | Outer Diameter :160mm ，Size :75x160x55mm ，Bore Diameter :75mm ，Brand:KOYO |
| NNCF5026-V Cylindrical roller bearings | Bore Diameter :130mm ，Outer Diameter :183.81mm ，Size :130x183.81x95mm ，Brand:NKE |
| 6300 Deep groove ball bearings | Size :10x35x11mm ，Brand:ZEN ，Outer Diameter :35mm ，Bore Diameter :10mm ，d:10 mm ，Width :11mm |
| 6403 Deep groove ball bearings | Outer Diameter :62mm ，Size :17x62x17mm ，Width :17mm ，Bore Diameter :17mm ，d:17 mm ，Brand:ZEN |
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