| Bearing type | Boundary Dimensions（mm） | ||
|---|---|---|---|
| d | D | B | |
| D/W R8 R-2RS1 | 12.7 | 28.575 | 7.938 |
| D/W R8 R-2RZ | 12.7 | 28.575 | 7.938 |
| D/W R8 R-2Z | 12.7 | 28.575 | 7.938 |
| D/W R8-2RS1 | 12.7 | 28.575 | 7.938 |
| D/W R8-2RZ | 12.7 | 28.575 | 7.938 |
| D/W R8-2Z | 12.7 | 28.575 | 7.938 |
| D/W RW0 R-2Z | 1.191 | 3.967 | 3.175 |
| D/W RW1 R-2Z | 1.397 | 4.762 | 3.571 |
| D/W RW133 | 2.38 | 4.762 | 2.38 |
| D/W RW133 R | 2.38 | 4.762 | 2.38 |
| D/W RW133 R-2ZS | 2.38 | 4.762 | 3.175 |
| D/W RW133-2ZS | 2.38 | 4.762 | 3.175 |
| D/W RW1-4 | 1.984 | 6.35 | 3.175 |
| D/W RW1-4 R | 1.984 | 6.35 | 3.175 |
| D/W RW1-4 R-2Z | 1.984 | 6.35 | 4.366 |
| D/W RW1-4-2Z | 1.984 | 6.35 | 4.366 |
| D/W RW1-4-2ZS | 1.984 | 6.35 | 4.366 |
| D/W RW144 | 3.175 | 6.35 | 3.175 |
| D/W RW144 R | 3.175 | 6.35 | 3.175 |
| D/W RW144 R-2Z | 3.175 | 6.35 | 3.571 |
| D/W RW144-2Z | 3.175 | 6.35 | 3.571 |
| D/W RW1-5-2Z | 2.38 | 7.938 | 4.366 |
| D/W RW155 | 3.967 | 7.938 | 3.571 |
| D/W RW155 R | 3.967 | 7.938 | 3.571 |
| D/W RW155 R-2ZS | 3.967 | 7.938 | 3.967 |
| D/W RW155-2ZS | 3.967 | 7.938 | 3.967 |
| D/W RW156 | 4.762 | 7.938 | 3.571 |
| D/W RW156 R | 4.762 | 7.938 | 3.571 |
| D/W RW156 R-2ZS | 4.762 | 7.938 | 3.967 |
| D/W RW156-2ZS | 4.762 | 7.938 | 3.967 |
