The coordination between non-standard bearings and shafts is generally clearance, and the race and bearing seat hole are generally transitional coordination. The rear axle ring of double bearing shall be fixed on the shaft to avoid relative rotation of the shaft.
Generally speaking, the rotation state of the shaft is most, so the cooperation between the inner hole and the shaft is win-win cooperation, and the interaction between the outer cavity and the bearing chamber is transition.
When installing non-standard bearings, check the flatness of shaft ring and shaft axis. The method is to fix the micrometer in the inner hole of the aluminum plate, rotate the bearing ring, the bearing on the watch contact on the dovetail guide rail, and observe the pointer of the micrometer. If the hand deflects, it indicates that the collar is not perpendicular to the shaft axis. When the hole depth of the shell is, it can also be measured with the extended micron. When the bearing is installed correctly, its race can be fully and automatically integrated into the rolling of the rolling element to ensure that the rolling element is located on the left and right ring raceways. If it is reversed, not only the abnormal operation of the bearing, but also each side will be more seriously damaged. Since the difference between shaft ring and stay ring is not obvious, special care shall be taken during installation to avoid errors. In addition, a clearance of 0.2 ~ 0.5mm shall be set between the center of the bearing race and the bearing seat hole to compensate for the deviation caused by part processing and safety error. When the deviation of the bearing throwing management center, the clearance can ensure its full-automatic adjustment, prevent contact friction and make it operate normally.
