| Bearing Number | Principal dimensions | |||
| d (mm) | d (in) | D (mm) | D (in) | |
| 33018 | 90 | 3.546 | 140 | 5.516 | 33218 | 90 | 3.546 | 160 | 6.304 |
| 31318 | 90 | 3.546 | 190 | 7.486 | 32018 | 90 | 3.546 | 140 | 5.516 |
| 32318 | 90 | 3.546 | 190 | 7.486 | 30318 | 90 | 3.546 | 190 | 7.486 |
| 30218 | 90 | 3.546 | 160 | 6.304 | 33019 | 95 | 3.743 | 145 | 5.713 |
| 31319 | 95 | 3.743 | 200 | 7.88 | 32019 | 95 | 3.743 | 145 | 5.713 |
| 32319 | 95 | 3.743 | 200 | 7.88 | 30319 | 95 | 3.743 | 200 | 7.88 |