| Bearing model | Boundary Dimensions（mm） | ||
|---|---|---|---|
| d | D | B | |
| N 204 ECP | 20 | 47 | 14 |
| NU 204 ECPHA | 20 | 47 | 14 |
| NJ 204 ECML | 20 | 47 | 14 |
| NU 2304 ECP | 20 | 52 | 21 |
| N 304 ECP | 20 | 52 | 15 |
| NU 304 ECP | 20 | 52 | 15 |
| NUP 304 ECP | 20 | 52 | 15 |
| NUP 2304 ECP | 20 | 52 | 21 |
| NJ 204 ECP | 20 | 47 | 14 |
| NU 2204 ECP | 20 | 47 | 18 |
| NUP 204 ECML | 20 | 47 | 14 |
| NJ 204 ECPHA | 20 | 47 | 14 |
| NJ 203 ECPHA | 17 | 40 | 12 |
| N 203 ECP | 17 | 40 | 12 |
| N 203 ECPH | 17 | 40 | 12 |
| NJ 203 ECML | 17 | 40 | 12 |
| NJ 303 ECP | 17 | 47 | 14 |
| NU 203 ECP | 17 | 40 | 12 |
| NU 203 ECML | 17 | 40 | 12 |
| N 303 ECP | 17 | 47 | 14 |
| NJ 2203 ECP | 17 | 40 | 16 |
| NUP 203 ECP | 17 | 40 | 12 |
| NJ 203 ECP | 17 | 40 | 12 |
| NUP 2203 ECP | 17 | 40 | 16 |
| NU 2203 ECP | 17 | 40 | 16 |
| NU 203 ECPHA | 17 | 40 | 12 |
| NU 303 ECP | 17 | 47 | 14 |
| NJ 202 ECP | 15 | 35 | 11 |
| NU 202 ECP | 15 | 35 | 11 |
| NU 202 ECPHA | 15 | 35 | 11 |
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