| Model | Boundary dimensions(mm) | ||||
| d | D | B | rs min | r1s min | |
| 7921CDT | 105 | 145 | 40 | 1.1 | 0.6 |
| 7922CDT | 110 | 150 | 40 | 1.1 | 0.6 |
| 7924CDT | 120 | 165 | 44 | 1.1 | 0.6 |
| 7926CDT | 130 | 180 | 48 | 1.5 | 1 |
| 7928CDT | 140 | 190 | 48 | 1.5 | 1 |
| 7930CDT | 150 | 210 | 56 | 2 | 1 |
| 7932CDT | 160 | 220 | 56 | 2 | 1 |
| 7934CDT | 170 | 230 | 56 | 2 | 1 |