Bearing maintenance judgment: In order to judge whether the disassembled bearing can be used, check the bearing after it is cleaned.Check the state of raceway surface, rolling surface and mating surface, wear condition of cage, increase of bearing clearance and damage of irrelevant dimension accuracy.For non-separable small ball bearings, hold the inner ring level with one hand and rotate the outer ring to make sure it is smooth.Separate bearings such as tapered roller bearings can be checked on the raceway surface of rolling body and outer ring respectively.Since large bearings cannot be rotated by hand, pay attention to check the appearance of rolling body, raceway surface, retainer, and flank surface, etc. The more important the bearing is, the more careful inspection is required.
Bearing cleaning: When removing the bearing for overhaul, the appearance of the bearing should be recorded first, the residual lubricant should be confirmed, and the bearing should be washed after the lubricant used for sampling inspection.As a cleaning agent, gasoline and kerosene are commonly used.Clean the disassembled bearings, divide the coarse cleaning and fine cleaning, respectively, put them in the container, first put the metal mesh bottom, so that the bearings do not directly contact with the container dirty.If the bearing rotates with dirt during rough cleaning, the rolling surface of the bearing will be damaged. Attention should be paid.In coarse cleaning oil, use a brush to remove grease and stickiness, after roughly clean, transfer to fine washing.Fine washing is to clean the bearings carefully while rotating in the cleaning oil.Also, keep the oil clean.
The cleaning of the bearings is divided into rough washing and fine washing, and the bottom of the container can be placed on the metal network.
● When rough washing, remove grease or stickiness in oil with brush, etc.If the bearing is rotated in oil at this time, note that the rolling surface will be damaged due to foreign matter.
● Fine washing, in the oil slowly turn the bearing, must be carried out carefully.
Usually the use of cleaning agents for neutral water diesel or kerosene, according to the need sometimes also use warm lye.No matter what detergent you use, always filter to keep clean.
After cleaning, apply anti-rust oil or anti-rust grease to the bearing immediately.