ways to improve fit

In order to improve the bearing manufacturer precision the actual installation, you must not make use of the bearing deformation measurement methods and measuring tools, bearings and cylindrical bore size of the mating surfaces of the actual precision measurement can be measured on the inner and outer diameters All items to be measured, and the measured data to make a comprehensive analysis of this as far and precision worthy of shaft and housing bore bearing mounting portion size. In actual measurements made ​​with the respective shaft and housing bore size and geometry should be the same with the measuring bearing temperature conditions.
To ensure the effect of a higher actual mating shaft and the bearing bore to match the surface, the roughness should be as small as possible.
In making these measurements, should be cylindrical and the bearing bore, the housing bore and the shaft, and a corresponding surface of the chamfered sides near the assembly, respectively, showing the maximum deviation to make the direction of two marks, so that in actual assembly, the mating alignment of both the maximum deviation of the same position, so that after assembly, the two sides can be partially offset by the deviation.
Directional signs made ​​two aims can compensate for deviations into account, even if both sides supporting each rotation accuracy improved, but also between the two bearing seat hole and both ends of the journal concentricity error partially eliminated . Surface hardening on the mating surfaces to implement measures, such as sandblasting, with a diameter slightly larger than the precision plunger plug holes, once inside, there is help to improve the fitting accuracy