Maintenance method of angular contact ball bearings

1. When the bearing runs to a certain period (or maintenance period), remove all the bearings;
2. Soak and clean the bearing with diesel oil or kerosene for cleaning. If there are technical conditions, it is best to open the sealing cover for cleaning;
3. After cleaning, dry the cleaning oil, and check the appearance for damage;
4. Use a wooden stick (preferably a hollow tube) with a diameter of about 150mm and the same diameter as the inner diameter of the angular contact ball bearing, and fix a bearing at one end;
5. While rotating the bearing quickly by hand, put the other end of the wooden stick (wooden tube) on the ear or the microphone of the audio amplifier to hear the bearing rotation noise;
6. After fixing the bearing, move the wooden stick horizontally to check whether the bearing is worn and loose;
7. FAG bearings with serious looseness, excessive rotation noise and serious defects should be eliminated and replaced with the same model;
8. Take a bucket and melt an appropriate amount of grease (high-quality yellow dry oil) with a slow fire (do not overheat), put the tested bearing into the bucket and soak until no bubbles overflow. Take out the bearing before the grease cools, and the amount of residual grease is small. After the grease is cooled, take out the angular contact ball bearing, and there will be a lot of residual grease. Determine the amount of grease residue as needed.
9. Wipe off the lubricating grease on the outside of the bearing with a soft cloth or toilet paper, and assemble the FAG bearing on the pulley as it is, and the maintenance work is over.