Recommended Fits, Housing
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.
- Stationary outer ring: The housing can be designed without a fit, or with a G7 clearance fit (which makes assembly easier). For higher dynamic requirements (ndm > 35,000 mm/min, prolonged operating duration), maintain a minimum clearance of at least 20 µm for the fit seat of the outer ring to the housing.
- Rotating outer ring: Normally use J6 (a transition fit with a slight tendency toward clearance fit); the fit seat should span the entire height of the outer ring. For maximum requirements use J6, or alternatively a G5 fit (a narrower fit that mates more easily with the bearing outer-diameter tolerance zone, though assembly may be more complex); for maximum accuracy, adjust the clearance fit toward 0. At higher speeds and prolonged operating durations, the interference fit must not exceed 5 µm. The table below lists the three tolerance zones G7 / J6 / K5 for selection.
Housing Tolerance Table
Symbol Legend
- Da: Housing (nominal) bore diameter (= bearing outer diameter D, mm)
- Bearing OD tolerance: Tolerance of the bearing outer diameter itself (0 / lower limit, µm)
- G7: Recommended housing tolerance zone for the stationary outer ring (µm)
- J6 / K5: Recommended housing tolerance zones for the rotating outer ring (µm)
- T1: Roundness / T3: Perpendicularity (µm)
- Rmax: Maximum corner radius (mm)
| Model | Housing Da [mm] | Bearing OD Tolerance [µm] | Stationary Outer Ring (Housing G7) | Rotating Outer Ring (Housing J6 / K5) | Rmax [mm] | ||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Upper | Lower | G7 Upper | G7 Lower | T1/T3 | J6 Upper/Lower | K5 Upper/Lower | T1 | T3 | |||
| AXDR 80 | 146 | 0 | -0.011 | 0.054 | 0.014 | 8 | 0.018 / -0.007 | 0.003 / -0.015 | 5 | 5 | 0.1 |
| AXDR 100 | 185 | 0 | -0.015 | 0.061 | 0.015 | 8 | 0.022 / -0.007 | 0.002 / -0.018 | 7 | 7 | 0.1 |
| AXDR 120 | 210 | 0 | -0.015 | 0.061 | 0.015 | 8 | 0.022 / -0.007 | 0.002 / -0.018 | 7 | 7 | 0.1 |
| AXDR 150 | 240 | 0 | -0.015 | 0.061 | 0.015 | 10 | 0.022 / -0.007 | 0.002 / -0.018 | 7 | 7 | 0.1 |
| AXDR 160 | 295 | 0 | -0.018 | 0.069 | 0.017 | 12 | 0.025 / -0.007 | 0.003 / -0.020 | 8 | 8 | 0.1 |
| AXDR 180 | 280 | 0 | -0.018 | 0.069 | 0.017 | 12 | 0.025 / -0.007 | 0.003 / -0.020 | 8 | 8 | 0.1 |
| AXDR 200 | 300 | 0 | -0.018 | 0.069 | 0.017 | 12 | 0.025 / -0.007 | 0.003 / -0.020 | 8 | 8 | 0.1 |
| AXDR 210 | 380 | 0 | -0.020 | 0.075 | 0.018 | 13 | 0.029 / -0.007 | 0.003 / -0.022 | 9 | 9 | 0.3 |
| AXDR 260 | 385 | 0 | -0.020 | 0.075 | 0.018 | 13 | 0.029 / -0.007 | 0.003 / -0.022 | 9 | 9 | 0.3 |
| AXDR 325 | 450 | 0 | -0.023 | 0.083 | 0.020 | 13 | 0.033 / -0.007 | 0.002 / -0.025 | 10 | 10 | 0.3 |
| AXDR 350 | 540 | 0 | -0.028 | 0.092 | 0.022 | 16 | 0.034 / -0.010 | 0.000 / -0.032 | 11 | 11 | 0.3 |
| AXDR 395 | 525 | 0 | -0.028 | 0.092 | 0.022 | 16 | 0.034 / -0.010 | 0.000 / -0.032 | 11 | 11 | 0.3 |
| AXDR 460 | 600 | 0 | -0.028 | 0.092 | 0.022 | 16 | 0.034 / -0.010 | 0.000 / -0.032 | 11 | 11 | 0.3 |
| AXDR 580 | 750 | 0 | -0.035 | 0.104 | 0.024 | 18 | 0.038 / -0.012 | 0.000 / -0.036 | 13 | 13 | 0.3 |
| AXDR 650 | 870 | 0 | -0.050 | 0.116 | 0.026 | 20 | 0.044 / -0.012 | 0.000 / -0.040 | 15 | 15 | 1 |