SKF
SKF W 638/4 R-2Z Deep Groove Ball Bearings
Product Code:W 638/4 R-2Z
Description
Technical specificationMetricImperialDIMENSIONSd4 mmD9 mmB4 mmd1? 5.2 mmD2? 8.1 mmD310.3 mmC1 mmr1,2min. 0.1 mmABUTMENT DIMENSIONSdamin. 4.8 mmdamax. 5.1 mmramax. 0.1 mmCALCULATION DATABasic dynamic load ratingC0.364 kNBasic static load ratingC00.114 kNFatigue load limitPu0.005 kNReference speed140000 r/minLimiting speed70000 r/minCalculation factorkr0.02Calculation factorf06.5MASSMass bearing0.0011 kg
Technical Specifications
Technical specification
DIMENSIONS
| d | 4 mm | |
|---|---|---|
| D | 9 mm | |
| B | 4 mm | |
| d1 | ? 5.2 mm | |
| D2 | ? 8.1 mm | |
| D3 | 10.3 mm | |
| C | 1 mm | |
| r1,2 | min. 0.1 mm |
ABUTMENT DIMENSIONS
| da | min. 4.8 mm | |
|---|---|---|
| da | max. 5.1 mm | |
| ra | max. 0.1 mm |
CALCULATION DATA
| Basic dynamic load rating | C | 0.364 kN |
|---|---|---|
| Basic static load rating | C0 | 0.114 kN |
| Fatigue load limit | Pu | 0.005 kN |
| Reference speed | 140000 r/min | |
| Limiting speed | 70000 r/min | |
| Calculation factor | kr | 0.02 |
| Calculation factor | f0 | 6.5 |
MASS
| Mass bearing | 0.0011 kg |
|---|