W638/3-2Z SKF 3x7x3mm ra max. 0.1 mm Deep groove ball bearings
| Bearing number | W638/3-2Z |
| Size (mm) | 3x7x3 |
| Brand | SKF |
| Bore Diameter (mm) | 3 |
| Outer Diameter (mm) | 7 |
| Width (mm) | 3 |
| d | 3 mm |
| D | 7 mm |
| B | 3 mm |
| C | 3 mm |
| d1 | – mm |
| d2 | 3.8 mm |
| r1 min. | 3.7 mm |
| r2 min. | 3.7 mm |
| D1 | 6.4 mm |
| D2 | 0.1 mm |
| da min. | 3.8 mm |
| Da max. | 6.5 mm |
| ra max. | 0.1 mm |
| Weight | 0.0005 Kg |
| Basic dynamic load rating (C) | 0.178 kN |
| Basic static load rating (C0) | 0.057 kN |
| Fatigue load limit (Pu) | 0.002 |
| Reference speed | 160000 r/min |
| Limiting speed | 80000 r/min |
| Calculation factor (f0) | 7.1 |
Detailed Parameters
parameter：
| TAFI 51512 Needle roller bearings | Outer Diameter :15mm ，Size :5x15x12mm ，Bore Diameter :5mm ，Brand:IKO |
| RCJTY45 Bearing units | Bore Diameter :45mm ，Brand:NKE ，V:111 mm ，d:45 mm ，P:24 mm |
| 22317 KW33 Spherical roller bearings | Bore Diameter :85mm ，Brand:ISO ，Size :85x180x60mm ，Outer Diameter :180mm ，Width :60mm |
| RNAO18X26X20 Needle roller bearings | Outer Diameter :26mm ，Brand:KOYO ，Width :20mm ，Size :18x26x20mm ，Bore Diameter :18mm ，Fw:18 mm |
| HKS13X19X14 Needle roller bearings | Size :13x19x14mm ，Brand:NTN ，Outer Diameter :19.000mm ，Width :14.000mm ，Bore Diameter :13.000mm |
| GE 010 HCR Plain bearings | Size :10x22x12mm ，Outer Diameter :22mm ，Brand:ISO ，Bore Diameter :10mm ，Width :12mm |
| 23068-K-MB-W33+AH3068 Spherical roller bearings | Outer Diameter :520mm ，Bore Diameter :340mm ，Brand:NKE ，Size :340x520x133mm |
| 71437/71750 Tapered roller bearings | Brand:NSK ，Bore Diameter :111.125mm ，Size :111.125x190.5x47.625mm ，Outer Diameter :190.5mm |
| RNA 4909 Needle roller bearings | Bore Diameter :52mm ，Size :52x68x22mm ，Brand:IKO ，Outer Diameter :68mm |
| 33112JR Tapered roller bearings | Bore Diameter :60mm ，Outer Diameter :100mm ，Size :60x100x30mm ，Brand:KOYO |
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