| Boundary dimensions(mm) | Mass(g) | Bearing Number | ||
| d | F | B | (Approx.) | |
| 12 | 15 | 12.5 | 6.1 | IR12X15X12.5 | 12 | 15 | 16 | 8 | IR12X15X16 |
| 12 | 15 | 16.5 | 8.1 | IR12X15X16.5 | 12 | 15 | 22.5 | 10.9 | IR12X15X22.5 |
| 12 | 16 | 12 | 7.9 | IR12X16X12 | 12 | 16 | 13 | 8.7 | IR12X16X13 |
| 12 | 16 | 14 | 9.5 | IR12X16X14 | 12 | 16 | 16 | 10.9 | IR12X16X16 |
| 12 | 16 | 20 | 13.5 | IR12X16X20 | 12 | 16 | 22 | 14.9 | IR12X16X22 |
| 12 | 16 | 22.5 | 15.2 | IR12X16X22.5 | 12 | 17 | 22.5 | 10.2 | IR12X17X22.5 |
| 15 | 18 | 16 | 9.6 | IR15X18X16 | 15 | 18 | 16.5 | 9.9 | IR15X18X16.5 |
| 15 | 19 | 16 | 12.8 | IR15X19X16 | 15 | 19 | 20 | 16.4 | IR15X19X20 |
| 15 | 20 | 12 | 12.1 | IR15X20X12 | 15 | 20 | 13 | 13.5 | IR15X20X13 |
| 15 | 20 | 14 | 14.7 | IR15X20X14 | 15 | 20 | 23 | 24.4 | IR15X20X23 |
| 17 | 20 | 16 | 10.7 | IR17X20X16 | 17 | 20 | 16.5 | 11.1 | IR17X20X16.5 |
| 17 | 20 | 20 | 13.5 | IR17X20X20 | 17 | 20 | 20.5 | 13.8 | IR17X20X20.5 |
