Rholer silindrog rhes sengl o gofio OD: 340mm
| Dynodiadau | Dimensiynau Terfyn (mm) | Graddfeydd Llwyth Sylfaenol (kN) | Màs(kg) | |||
| d | D | B | Cr | Cor | Cyfeirio. | |
| NU3238M/C3 | 190 | 340 | 120 | 1320 | 2340 | 51.2 |
| NJ2238EM | 190 | 340 | 92 | 1210 | 1660. llarieidd-dra eg | 39.6 |
| NU2238EM/C9 | 190 | 340 | 92 | 1210 | 1660. llarieidd-dra eg | 38.6 |
| NU2238M | 190 | 340 | 92 | 1140. llarieidd-dra eg | 1750. llathredd eg | 38.6 |
| NU238EM/CNM- DT | 190 | 340 | 55 | 710 | 980 | 22.5 |
| NU238EM-DT | 190 | 340 | 55 | 710 | 980 | 22.5 |
| N238EM | 190 | 340 | 55 | 710 | 980 | 22.6 |
| NUP238M | 190 | 340 | 55 | 620 | 885 | 22.3 |





