Factors for calculating the preload and frictional moment of a bearing set
| Number of
bearings |
Arrangement | Designation suffix | Factor |
| 3 | Back-to-back and tandem | TBT | 1,35 |
| Face-to-face and tandem | TFT | 1,35 | |
| 4 | Back-to-back and tandem | QBT | 1,55 |
| Face-to-face and tandem | QFT | 1,55 | |
| Tandem back-to-back | QBC | 2 | |
| Tandem face-to-face | QFC | 2 |
