| Bearing model | Boundary Dimensions（mm） | ||
|---|---|---|---|
| d | D | B | |
| 6304 | 20 | 52 | 15 |
| 4304 ATN9 | 20 | 52 | 21 |
| W 61904-2Z | 20 | 37 | 9 |
| 6304-2RSL | 20 | 52 | 15 |
| 6304-2RSH | 20 | 52 | 15 |
| W 6004-2Z | 20 | 42 | 12 |
| W 63804 R | 20 | 32 | 10 |
| 6204 NR | 20 | 47 | 14 |
| W 63804 R-2Z | 20 | 32 | 10 |
| W 61904-2RS1 | 20 | 37 | 9 |
| 6004 N | 20 | 42 | 12 |
| 6004-ZNR | 20 | 42 | 12 |
| W 61904 R-2Z | 20 | 37 | 9 |
| W 61704 R-2ZS | 20 | 27 | 4 |
| W 61804 | 20 | 32 | 7 |
| W 61704-2RS1 | 20 | 27 | 4 |
| 61904 | 20 | 37 | 9 |
| 62304-2RS1 | 20 | 52 | 21 |
| 6204-ZNR | 20 | 47 | 14 |
| W 6304-2RS1 | 20 | 52 | 15 |
| WBB1-8714-2ZS | 20 | 25 | 4 |
| 61904-2RZ | 20 | 37 | 9 |
| W 6204-2RS1/VP311 | 20 | 47 | 14 |
| W 6304-2Z | 20 | 52 | 15 |
| 6304-2Z | 20 | 52 | 15 |
| 6404 | 20 | 72 | 19 |
| WBB1-8714 | 20 | 25 | 4 |
| 4204 ATN9 | 20 | 47 | 18 |
| W 6004 | 20 | 42 | 12 |
| 6304 N | 20 | 52 | 15 |
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