| 轴承型号 | 外形尺寸 mm | |||
| 新型号 | 老型号 | d | D | B |
| RNU220 | 292220 | 120 | 180 | 34 | RNU220E | 292220E | 119 | 180 | 34 |
| RNU221 | 292221 | 126.8 | 190 | 36 | RNU221E | 292221E | 125 | 190 | 36 |
| RNU222 | 292222 | 132.5 | 200 | 38 | RNU222E | 292222E | 132.5 | 200 | 38 |
| RNU224 | 292224 | 143.5 | 215 | 40 | RNU224E | 292224E | 143.5 | 215 | 40 |
| RNU226 | 292226 | 156 | 230 | 40 | RNU226E | 292226E | 153.5 | 230 | 40 |
| RNU228 | 292228 | 169 | 230 | 42 | RNU228E | 292228E | 169 | 230 | 42 |
