Preparation and Tolerance of Housing Bore
In order to achieve the proper press-fit, the tolerance of the housing must be observed.
Machine tolerances are ISO standard H8
Millimeters |
|
Housing Bore ø |
Tolerance |
| 10 to 18 | +0.027 |
| 18 to 30 | +0.033 |
| 30 to 50 | +0.039 |
| 50 to 80 | +0.046 |
| 80 to 120 | +0.054 |
| 120 to 180 | +0.063 |
| 180 to 250 | +0.072 |
| 250 to 315 | +0.081 |
| 315 to 400 | +0.089 |
Inches |
|
Housing Bore ø |
Tolerance |
| 0.375 to 0.700 | +0.0010 |
| 0.700 to 1.187 | +0.0013 |
| 1.187 to 2.000 | +0.0015 |
| 2.000 to 3.150 | +0.0018 |
| 3.150 to 4.725 | +0.0020 |
| 4.725 to 7.000 | +0.0024 |
| 7.000 to 9.875 | +0.0028 |
| 9.875 to 12.500 | +0.0030 |
| 12.500 to 15.750 | +0.0035 |
The housing bore should have a good surface finish of at least 16 μm
To facilitate seal installation, the entrance to the bore should have a 5-10 degree chamfer, 1.0-1.5 mm deep.
