Number of
bearings |
Arrangement | Preload of a matched set, prior to mounting | ||||
for maximum rigidity | for maximum speed | |||||
Designation suffix | Preload | Designation suffix | Preload | |||
– | – | – | N | – | N | |
2 | Back-to-back | DBA | 130 | – | – | |
Face-to-face | DFA | 130 | – | – | ||
3 | Back-to-back and tandem | TBTA | 175,5 | TBTL | 130 | |
Face-to-face and tandem | TFTA | 175,5 | TFTL | 130 | ||
4 | Tandem back-to-back | QBCA | 260 | – | – | |
Tandem face-to-face | QFCA | 260 | – | – | ||
Back-to-back and tandem | QBTA | 208 | QBTL | 130 | ||
Face-to-face and tandem | QFTA | 208 | QFTL | 130 |
For symmetrical arrangements, preload class A = preload class L e .g. the designation suffix DBL does not exist.
For bearing sets with five bearings, contact the SKF application engineering service.