Dust bearing full and proper performance of its long-term, we must effectively do regular maintenance (periodic inspection). Through appropriate periodic inspection, so that early detection of failures, prevent accidents in the first place, to improve productivity and economy is very important. 1, cleaning the dust in the dry mill type bearings removed for inspection, first make the appearance of photography and other recording methods. In addition, to confirm the remaining amount of lubricant and lubricant sampling, and then cleaning bearings. a, bearing coarse washing and cleaning points for sperm washing, and at the bottom of the container used in the metal grid. b, coarse wash, brush, etc. used in the oil or grease removal adhesive material. Turning the formula in the oil dry mill dust bearing, note damage due to foreign body rolling surface. c, sperm washing, in the oil slowly rotating bearings should be carefully carried. Cleaning agent used is generally neutral water-free diesel or kerosene, is sometimes necessary to use warm lye. No matter what kind of cleaning agent used, filter should always be kept clean. After cleaning, immediately bearing anti-rust coating rust oil or grease. 2, inspection and judgment in order to determine the removed dust in the dry mill type bearing can be reused, to focus on checking the accuracy of its size, rotation accuracy, internal clearance and with the surface, raceway, cage and ring. On the inspection results, to judge by the formula used to the dry mill dust bearing or bearings are proficient. Judgment criteria based on mechanical properties and importance and inspection cycles vary. If the following injury, the bearings must not be reused and must be replaced.