| Bearing type 轴承型号 | Boundary Dimensions（mm）外形尺寸 | ||
|---|---|---|---|
| d 内径 | D 外径 | B 内圈 宽度 | |
| W 638/5 R-2RS1 | 5 | 11 | 5 |
| W 638/5 R-2Z | 5 | 11 | 5 |
| W 638/5-2RS1 | 5 | 11 | 5 |
| W 638/5-2RZ | 5 | 11 | 5 |
| W 638/5-2Z | 5 | 11 | 5 |
| W 638/8 R-2Z | 8 | 16 | 6 |
| W 638/8-2Z | 8 | 16 | 6 |
| W 638/9-2Z | 9 | 17 | 6 |
| W 63800 | 10 | 19 | 7 |
| W 63800 R | 10 | 19 | 7 |
| W 63800 R-2RS1 | 10 | 19 | 7 |
| W 63800 R-2Z | 10 | 19 | 7 |
| W 63800-2RS1 | 10 | 19 | 7 |
| W 63800-2RZ | 10 | 19 | 7 |
| W 63800-2Z | 10 | 19 | 7 |
| W 63801 | 12 | 21 | 7 |
| W 63801 R | 12 | 21 | 7 |
| W 63801 R-2Z | 12 | 21 | 7 |
| W 63801-2RS1 | 12 | 21 | 7 |
| W 63801-2RZ | 12 | 21 | 7 |
| W 63801-2Z | 12 | 21 | 7 |
| W 63802 | 15 | 24 | 7 |
| W 63802 R | 15 | 24 | 7 |
| W 63802 R-2Z | 15 | 24 | 7 |
| W 63802-2RS1 | 15 | 24 | 7 |
| W 63802-2RZ | 15 | 24 | 7 |
| W 63802-2Z | 15 | 24 | 7 |
| W 63803 | 17 | 26 | 7 |
| W 63803 R | 17 | 26 | 7 |
| W 63803 R-2Z | 17 | 26 | 7 |
