(1) Bearing Maintenance: In order to maintain the original bearing performance in good condition for as long as possible, maintenance and overhaul are required to prevent accidents before they occur, ensuring the reliability of operation and enhancing the productivity and economy. Maintenance of the best corresponding mechanical operating conditions of the operating standards, on a regular basis. The contents include the monitoring of operational status, replacement or replacement of lubricants, regular disassembly inspection. As a maintenance item in operation, there is bearing rotation noise, vibration, temperature, lubricant condition, and the like. (2), the bearing overhaul: bearing cleaning: remove the next bearing overhaul, first record the appearance of the bearing to confirm the remaining amount of lubricant, sample inspection lubricant, wash the bearings. As a cleaning agent, the general use of gasoline, kerosene. Remove the bearing cleaning, rough cleaning and fine cleaning, respectively, on the container, put the metal mesh bottom, so that the bearings do not directly contact with the container of dirt. Rough cleaning, if the bearings with dirt rotation, will damage the bearing rolling surface, it should be noted. In the rough cleaning oil, use a brush to remove grease, stickies, roughly clean, into the fine wash. Fine wash, is the bearing in the cleaning oil while rotating, while carefully cleaned. In addition, cleaning oil should always be kept clean. Bearing maintenance and judgment: In order to determine whether the demolition of the bearing can be used, to be cleaned after the bearing inspection. Check the raceway, the rolling surface, with the state of the surface, the cage wear, increased bearing clearance and whether or not to reduce the dimensional accuracy of the damage, abnormalities. Non-separable small ball bearings, the inner ring with one hand level support, rotate the outer ring to confirm whether the fluid. Tapered roller bearings, such as separate bearings, can be rolling, outer raceway surface were inspected. Large bearings because they can not be rotated by hand, pay attention to check the rolling body, raceway surface, cage, ribs and other appearance, bearing the higher the importance of more careful inspection.