Railway locomotive accessories bearing is an important mechanical component. Its main function is to support the mechanical rotating body, reduce the friction 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. The material is usually made of high-hardness, high-wear-resistant alloy steel. On railway locomotives, bearings are usually used in wheels, axles and other parts to enable them to roll smoothly on the rails. In addition, bearings can also reduce mechanical vibration and noise, and improve the running stability and riding comfort of railway locomotives. In order to ensure the service life and performance stability of the bearings, regular maintenance and upkeep is required, such as cleaning, lubrication, replacement, etc.