The plane thrust bearing mainly bears axial load in the assembly, and it is widely used. Although the installation operation of thrust bearing is relatively simple, errors often occur in actual maintenance, that is, the installation position of the tight ring and loose ring of the bearing is incorrect, resulting in the bearing losing its function and the journal being worn out quickly. The tight ring is installed on the end face of the stationary part, that is, it is incorrectly assembled. The inner ring of the tight ring is in transition fit with the shaft neck. When the important official rotates, it drives the tight ring and rubs against the end face of the stationary part. When the axial force (Fx) is applied, the friction torque will be greater than the inner diameter fit resistance torque, which will cause the tight ring and the shaft mating surface to rotate forcibly and aggravate the wear of the shaft neck.