TIMKEN bearing adjustment

Timken bearing adjustment
Unlike other cylindrical bore radial bearings, the internal clearance of single row angular contact ball timken bearings and tapered roller bearings can only be established when one bearing is adjusted for the other bearing. Normally these bearings are back-to-back or face-to-face and one of the bearing rings is axially displaced until the selected play or preload is reached. The choice of clearance or preload depends on the requirements for bearing layout performance and operating conditions. For details on bearing preload, see section "Preload control of bearings". Therefore, the following recommendations only concern the internal clearance adjustment of the bearing arrangement of angular contact ball bearings and tapered roller bearings.

The proper clearance value is to be set during installation and can be determined according to the bearing load and operating temperature conditions. Depending on the size and layout of the bearing, the material from which the shaft and the bearing housing are made, and the distance between the two bearings, the initial clearance achieved during installation may become smaller or larger in actual operation. For example, the thermal expansion of the inner and outer rings will cause a reduction in the clearance during operation. Therefore, the initial clearance must be large enough to avoid deformation of the timken bearing and its adverse consequences.

Since there is a clear relationship between the radial and axial internal clearances of angular contact ball bearings and tapered roller bearings, only one value can be specified. It is generally specified axial internal clearance. This specified value can then be obtained from a zero-clearance state by loosening or tightening the screw ring in the nut or shaft hole in the housing, or by inserting a calibrated washer between a bearing ring and its support. Or gaskets. The actual method used to adjust the clearance and measure the set clearance depends on the number of bearings to be installed.

For example, one method is to use a dial gauge mounted on the hub to check the set axial clearance of the hub bearing arrangement. It is important that when adjusting tapered roller timken bearings and measuring clearances, the shaft or bearing housing must be rotated several times in different directions to ensure proper contact between the ball ends and the leading edge on the inner ring. If the contact is improper, the measurement result will be inaccurate and the intended adjustment will not be achieved.