In order to judge whether the removed imported bearings can be reused, check the bearings after cleaning. Carefully check the raceway surface, the rolling surface, the state of the mating surface, the wear of the cage, the increase in the clearance of the imported bearing, and the presence or absence of damage to the dimensional accuracy. For non-separable miniature ball bearings, use one hand to support the inner ring horizontally and rotate the outer ring to check if it is smooth.
Separate bearings such as tapered roller bearings can be inspected separately for the rolling surfaces of the rolling elements and the outer ring.
Large bearings cannot be rotated by hand. Pay attention to the appearance of rolling elements, raceways, cages, and ribs. The higher the importance of bearings, the more careful inspection is required.
The judgment of whether it can be reused is determined by considering the degree of damage of the imported bearings, mechanical properties, importance, operating conditions, and the period until the next inspection. However, if you have the following defects, you can no longer use them. New bearings must be replaced.
There is a crack, or a gap, in any of the inner ring, the outer ring, the rolling element, and the cage.
There is a break in any of the ferrule and the rolling element.
There is significant slack in the raceway, ribs and rolling elements.
There are rust and damage on the raceway surface and the rolling elements.
There are severe indentations and marks on the raceway surface and rolling elements.
There is significant creep in the inner diameter surface of the inner ring or the outer diameter surface of the outer ring.
The discoloration caused by heat is obvious.
Bearings sealed with grease, seals, or dust caps are clearly damaged.
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