SKF
SKF W 638/4 X-2Z Deep Groove Ball Bearing
Product Code:W 638/4 X-2Z
Description
Technical specification MetricImperial DIMENSIONS d 4 mmD 10 mmB 4 mmd1? 5.9 mmD2? 8.8 mmr1,2min. 0.2 mm ABUTMENT DIMENSIONS damin. 5.6 mmdamax. 5.8 mmDamax. 8.8 mmramax. 0.2 mm CALCULATION DATA Basic dynamic load ratingC 0.553 kNBasic static load ratingC0 0.245 kNFatigue load limitPu 0.011 kNReference speed 130000 r/minLimiting speed 63000 r/minCalculation factorkr 0.02Calculation factorf0 12.3 MASS Mass bearing 0.0013 kg
Technical Specifications
Technical specification 
DIMENSIONS
| d | 4 mm | |
|---|---|---|
| D | 10 mm | |
| B | 4 mm | |
| d1 | ? 5.9 mm | |
| D2 | ? 8.8 mm | |
| r1,2 | min. 0.2 mm |
ABUTMENT DIMENSIONS
| da | min. 5.6 mm | |
|---|---|---|
| da | max. 5.8 mm | |
| Da | max. 8.8 mm | |
| ra | max. 0.2 mm |
CALCULATION DATA
| Basic dynamic load rating | C | 0.553 kN |
|---|---|---|
| Basic static load rating | C0 | 0.245 kN |
| Fatigue load limit | Pu | 0.011 kN |
| Reference speed | 130000 r/min | |
| Limiting speed | 63000 r/min | |
| Calculation factor | kr | 0.02 |
| Calculation factor | f0 | 12.3 |
MASS
| Mass bearing | 0.0013 kg |
|---|