In order to give full play to the angular contact ball bearings and long-term to maintain its due performance, we must earnestly regular (regular inspection) maintenance. Through proper periodic inspection, it is very important to improve the productivity and economy by early detection of faults, prevention of accidents in the early stages and proper periodic inspection so as to detect faults early and prevent accidents in the first place. 1, Cleaning: Remove the angular contact ball bearings inspection, the first use of photography and other methods to make a good appearance record. Also, check the amount of remaining lubricant and sample the lubricant before you clean the angular contact ball bearings. a, angular contact ball bearings cleaning points washed and fine wash, and the bottom of the container can be placed on the metal grid. b, rough wash, remove the grease or adhesive in the oil with a brush. At this time if the angle of rotation in the oil contact ball bearings, pay attention to foreign body damage and other damage to the rolling surface. c, fine cleaning, slowly turning in the oil angular contact ball bearings, to be carefully carried out. Commonly used cleaning agents are neutral, non-aqueous diesel or kerosene, sometimes depending on the need to use warm lye and so on. No matter what kind of cleaning agents, should always be filtered to keep clean. After cleaning, apply anti-rust oil or anti-rust grease on the angular contact ball bearing immediately. 2, check and determine: In order to determine the removal of angular contact ball bearings can be re-used, we should focus on checking its dimensional accuracy, precision, internal clearance and the mating surface, raceway, cage and seals. As for the inspection results, it can be judged by the contact angle of ball bearings or angular contact ball bearings. The criteria for judging vary depending on the mechanical properties and the degree of importance, the inspection cycle, and the like. Angular contact ball bearings are not to be reused for any of the following damages and must be replaced. a angular contact ball bearing parts of the fracture and defects. b roller rolling surface of the separation.