Surface roughness of bearing seats
| Seat diameter | Ra (guideline values for ground seats) | |||
| d, D | Diameter tolerance grade | |||
| > | ≤ | IT7 | IT6 | IT5 |
| mm | μm | |||
| – | 80 | 1,6 | 0,8 | 0,4 |
| 80 | 500 | 1,6 | 1,6 | 0,8 |
| 500 | 1 250 | 3,21) | 1,6 | 1,6 |
- 1) When using the oil injection method for mounting, Ra should not exceed 1,6 μm.
