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Bearing overhaul
Bearing cleaning: When disassembling the bearing for inspection, first record the appearance of the bearing, confirm the residual amount of lubricant, and wash the bearing after sampling the lubricant for inspection. As the cleaning agent, gasoline and kerosene are generally used.
The cleaning of the disassembled bearing is divided into coarse cleaning and fine cleaning, which are respectively placed in the container, and the bottom of the metal mesh pad is placed first, so that the bearing does not directly contact the dirt of the container. Rough cleaning If the bearing is rotated with dirt, it will damage the rolling surface of the bearing, so you should pay attention. In the rough cleaning oil, use a brush to remove grease and adhesions. After it is roughly clean, transfer to the fine cleaning.
Fine cleaning is to carefully clean the bearing while rotating in the cleaning oil. In addition, the cleaning oil should always be kept clean.
Bearing maintenance and judgment: In order to judge whether the disassembled bearing can be used, it should be checked after the bearing is cleaned. Check the condition of the raceway surface, rolling surface and mating surface, the wear of the cage, the increase of bearing clearance, and the damage and abnormality irrelevant to the decrease of dimensional accuracy. For non-separable small ball bearings, hold the inner ring horizontally with one hand, and rotate the outer ring to check for smoothness.
Separable bearings such as tapered roller bearings can be inspected separately for the rolling elements and the raceway surface of the outer ring.
Because large bearings cannot be rotated by hand, pay attention to checking the appearance of rolling elements, raceway surfaces, cages, rib surfaces, etc. The higher the importance of the bearing, the more careful inspection is required.
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