1. Bearing cleaning

When disassembling the bearing for maintenance, first record the appearance of the bearing, confirm the remaining amount of lubricant, and then clean the bearing after sampling the lubricant for inspection. As cleaning agents, cleaning agents and kerosene are generally used. The disassembled bearings are cleaned, divided into coarse cleaning and fine cleaning. They are placed in containers respectively. First, put a metal mesh pad on the bottom to prevent the bearings from directly contacting the dirt in the container. During rough cleaning, if the bearing is rotated with dirt, it will damage the rolling surface of the bearing, so care should be taken. In the coarse cleaning oil, use a brush to remove grease and sticky matter. After it is roughly clean, switch to fine cleaning. Fine cleaning is to carefully clean the bearing while rotating it in the cleaning oil. In addition, the cleaning oil should also be kept clean frequently.

2. Bearing maintenance and judgment

In order to judge whether the disassembled bearing can be used, the bearing should be inspected after cleaning. Check the condition of the raceway surface, rolling surface, and mating surface, the wear of the cage, the increase in bearing clearance, and any damage related to the decrease in dimensional accuracy, and abnormalities. For non-separable small ball bearings, use one hand to support the inner ring horizontally and rotate the outer ring to confirm whether it is smooth. For separable bearings such as tapered roller bearings, the rolling elements and raceway surfaces of the outer ring can be inspected separately. Since large bearings cannot be rotated by hand, pay attention to the appearance of rolling elements, raceway surfaces, cages, rib surfaces, etc. The more important the bearing, the more careful inspection is required.