Preload of universally matchable single row angular contact ball bearings arranged back-to-back or f
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| Bore diameter |
Preload Class |
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| d | GA | GB | GC | ||||
| > | ≤ | min. | max. | min. | max. | min. | max. |
| mm | µm | µm | µm | ||||
| 10 | 18 | +4 | –4 | –2 | –10 | –8 | –16 |
| 18 | 30 | +4 | –4 | –2 | –10 | –8 | –16 |
| 30 | 50 | +4 | –4 | –2 | –10 | –8 | –16 |
| 50 | 80 | +6 | –6 | –3 | –15 | –12 | –24 |
| 80 | 120 | +6 | –6 | –3 | –15 | –12 | –24 |
| 120 | 180 | +6 | –6 | –3 | –15 | –12 | –24 |
| 180 | 250 | +8 | –8 | –4 | –20 | –16 | –32 |
| 250 | 315 | +8
|
–8
|
–4
|
–20
|
–16
|
–32
|
