The bearing of railway locomotive parts is an important mechanical component. Its main function is to support the mechanical rotating body, reduce the frictional resistance during its movement, and ensure the normal operation of mechanical equipment. The main structure of the bearing includes the inner ring, outer ring, rolling elements and cage, and the material is usually made of alloy steel with high hardness and high wear resistance. On railway locomotives, bearings are usually used for wheels, axles, etc., so that they can roll smoothly on the rails. In addition, bearings can also reduce mechanical vibration and noise, and improve the running stability and ride comfort of railway locomotives. In order to ensure the service life and performance stability of the bearing, regular maintenance and maintenance, such as cleaning, lubrication, replacement, etc., are required.