And other cylindrical bearing aperture to different row angular contact ball bearings and tapered roller bearings internal clearance, only when a bearing is adjusted against another bearing can be established.
    Usually these bearings are paired back to back or face to face, one bearing ring axial displacement, until it reaches the selected clearance or preload. Clearance or pre-load option, depending on the operating conditions bearing on the performance and layout requirements. Therefore, the following recommendations relate only to angular contact ball bearings and tapered roller bearing internal clearance adjustment bearing layout.
    To reach when installing the appropriate clearance values ??may be determined according to the load and operating temperature condition of the bearing. Size and layout depending on the distance of bearings, shaft and housing materials and manufacturing between the two bearings, the initial clearance obtained when installed in the actual operation may be smaller or larger. For example, the temperature difference between the thermal expansion of the inner and outer rings will cause the operation of midstream gap narrowed, so the initial clearance must be quite large in order to avoid bearing deformation and its adverse consequences.
    Since the angular contact ball bearings and tapered roller there is a definite relationship between the radial and axial bearings internal clearance, so you can specify only one value. Generally designated axial internal clearance. Then you can get through the following methods from zero clearance status of the specified value: loosen or tighten the nut or the housing bore of the mandrel rod spiro, or between a bearing ring and its support into the calibration washer or pads. Used to adjust the clearance and measure the set clearance practical ways, depending on the number of bearing the amount to be mounted.
    For example, one method is to use a hub mounted on a dial gauge, check the wheel bearings layout set axial clearance. It is important when adjusting tapered roller bearings and measuring the clearance, shaft or bearing housing need in different directions of rotation for several weeks to ensure that the leading edge of the inner end portion of the ball on the appropriate contacts. If the contact properly, the measurement result is not accurate, it can not achieve the desired adjustment purposes.