Recommended Fits, Shaft
The accuracy of the fits and the geometrically correct design of all adjacent parts have a direct effect on the accuracy and dynamic properties of the bearing and the table. In case of maximum demands, the tolerances and fits should be restricted accordingly.
- Rotating inner ring: On a rotating shaft, the bearing inner ring must be supported radially across its whole surface, and the shaft is to be designed with an h5 fit; in this way the bearing bore tolerance generates a transition fit with a slight tendency toward a clearance fit. For maximum accuracy requirements, a clearance fit of 0 must be targeted; at higher speeds (ndm > 35,000 mm/min) and prolonged operating durations (>10%), an interference fit of 5 µm must not be exceeded.
- Stationary inner ring: A stationary, screwed inner ring does not require a special fit and can also be mounted with clearance to the shaft; if the inner ring is to be centred, use shaft tolerance g6, or h5 under maximum requirements. Press (interference) fits are to be avoided, as they increase the bearing preload.
Shaft Tolerance Table
Legend
- d: shaft (nominal) diameter (mm)
- Bearing bore tolerance: tolerance of the bearing bore itself (0 / lower limit, µm)
- g6: recommended shaft tolerance zone for a stationary inner ring (µm)
- h5: recommended shaft tolerance zone for a rotating inner ring (µm)
- T1: roundness / T2: parallelism / T3: perpendicularity (µm)
- Rmax: maximum corner radius (mm)
| Model | Shaft d [mm] | Bearing bore tolerance [µm] | Stationary inner ring (shaft g6) | Rotating inner ring (shaft h5) | Rmax [mm] | |||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Upper | Lower | g6 upper | g6 lower | T1/T2/T3 | h5 upper | h5 lower | T1 | T2 | T3 | |||
| AXDR 80 | 80 | 0 | -0.009 | -0.010 | -0.029 | 5 | 0 | -0.013 | 3 | 1.5 | 3 | 0.1 |
| AXDR 100 | 100 | 0 | -0.010 | -0.012 | -0.034 | 6 | 0 | -0.015 | 4 | 2 | 4 | 0.1 |
| AXDR 120 | 120 | 0 | -0.010 | -0.012 | -0.034 | 6 | 0 | -0.015 | 4 | 2 | 4 | 0.1 |
| AXDR 150 | 150 | 0 | -0.013 | -0.014 | -0.039 | 8 | 0 | -0.018 | 5 | 2.5 | 5 | 0.1 |
| AXDR 160 | 160 | 0 | -0.013 | -0.014 | -0.039 | 8 | 0 | -0.018 | 5 | 2.5 | 5 | 0.1 |
| AXDR 180 | 180 | 0 | -0.013 | -0.014 | -0.039 | 8 | 0 | -0.018 | 5 | 2.5 | 5 | 0.1 |
| AXDR 200 | 200 | 0 | -0.015 | -0.015 | -0.044 | 10 | 0 | -0.020 | 7 | 3.5 | 5 | 0.1 |
| AXDR 210 | 210 | 0 | -0.015 | -0.015 | -0.044 | 10 | 0 | -0.020 | 7 | 3.5 | 7 | 0.3 |
| AXDR 260 | 260 | 0 | -0.018 | -0.017 | -0.049 | 12 | 0 | -0.023 | 8 | 4 | 7 | 0.3 |
| AXDR 325 | 325 | 0 | -0.023 | -0.018 | -0.054 | 13 | 0 | -0.025 | 9 | 4.5 | 7 | 0.3 |
| AXDR 350 | 350 | 0 | -0.023 | -0.018 | -0.054 | 13 | 0 | -0.025 | 9 | 4.5 | 7 | 0.3 |
| AXDR 395 | 395 | 0 | -0.023 | -0.018 | -0.054 | 13 | 0 | -0.025 | 9 | 4.5 | 7 | 0.3 |
| AXDR 460 | 460 | 0 | -0.023 | -0.020 | -0.060 | 15 | 0 | -0.027 | 10 | 5 | 7 | 0.3 |
| AXDR 580 | 580 | 0 | -0.025 | -0.022 | -0.066 | 17 | 0 | -0.032 | 11 | 5.5 | 8 | 1 |
| AXDR 650 | 650 | 0 | -0.038 | -0.024 | -0.074 | 19 | 0 | -0.036 | 13 | 6.5 | 10 | 1 |