| Bearing model | Boundary Dimensions（mm） | ||
|---|---|---|---|
| d | D | B | |
| D/W R188-2RZ | 6.35 | 12.7 | 4.762 |
| D/W R4-2RS1 | 6.35 | 15.875 | 4.978 |
| D/W R4A-2Z | 6.35 | 19.05 | 7.142 |
| D/W R168-2Z | 6.35 | 9.525 | 3.175 |
| D/W RW4 R-2Z | 6.35 | 15.875 | 5.77 |
| D/W R168 R | 6.35 | 9.525 | 3.175 |
| D/W RW4 R-2RZ | 6.35 | 15.875 | 5.77 |
| D/W RW188-2Z | 6.35 | 12.7 | 5.558 |
| D/W R188-2RS1 | 6.35 | 12.7 | 4.762 |
| D/W RW4 R | 6.35 | 15.875 | 5.77 |
| D/W R4 R-2RS1 | 6.35 | 15.875 | 4.978 |
| D/W RW4-2RZ | 6.35 | 15.875 | 5.77 |
| EE 2 TN9 | 6.35 | 19.05 | 5.556 |
| D/W R4A | 6.35 | 19.05 | 5.558 |
| W 626 R-2RZ | 6 | 19 | 6 |
| W 606 R-2RS1 | 6 | 17 | 6 |
| WBB1-8706 R-2RS1 | 6 | 12 | 4 |
| W 627/6-2Z | 6 | 10 | 3 |
| W 627/6 R-2Z | 6 | 10 | 3 |
| W 619/6-2Z | 6 | 15 | 5 |
| W 636-2RS1 | 6 | 22 | 7 |
| WBB1-8706-2RZ | 6 | 12 | 4 |
| W 626 R-2RS1 | 6 | 19 | 6 |
| W 628/6 R-2Z | 6 | 13 | 5 |
| 626 | 6 | 19 | 6 |
| 626-2Z | 6 | 19 | 6 |
| W 619/6 R-2Z | 6 | 15 | 5 |
| W 619/6 R-2RS1 | 6 | 15 | 5 |
| W 619/6 X-2RS1 | 6 | 16 | 5 |
| 619/6-2Z | 6 | 15 | 5 |
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