To determine whether the disassembled bearing can be reused, it is necessary to inspect the thrust ball bearing after it has been cleaned. Carefully inspect the condition of the raceway surface, rolling surface, and mating surface, the wear of the cage, the increase in bearing clearance, and whether there is any damage or abnormality related to the decrease in dimensional accuracy. For non separable small ball bearings, use one hand to support the inner ring horizontally and rotate the outer ring to confirm smoothness.

Conical roller bearings and equally spaced bearings allow for separate inspection of the rolling elements and outer race raceway surfaces.
Large bearings cannot be rotated by hand, so it is important to check the appearance of the rolling elements, raceway surfaces, retainers, and retaining surfaces. The higher the importance of bearings, the more careful the inspection must be.
The determination of whether it can be reused is based on the degree of damage to the thrust ball bearing, mechanical performance, importance, operating conditions, and the period until the next maintenance. However, if there are the following defects, it cannot be used anymore. New bearings must be replaced.
Although the noise caused by manufacturing factors of IMCB bearings is essentially due to manufacturing errors, it is still related to the selection of lubricants, installation conditions of bearings, and the accuracy status of shafts and bearing seats. This type of noise is divided into two categories: cage sound and vibration pattern sound, which are described as follows:
(1) Cage sound and its control method Cage sound refers to the periodic vibration and noise emitted by the impact of the cage and rolling elements during severe vibration, which is prone to occur when the pocket is loose and friction is high. This type of noise mainly occurs in ball bearings and thrust ball bearings, and can occur in both stamped and solid retainers. It can occur when lubricated with grease or oil, but it is more likely to occur when the lubrication is poor or the lubricant is dry, when the radial clearance is large, when the outer ring is subjected to torque loads, and when the retainer structure is poor and the accuracy is low. In severe cases, the retainer web or rivet head may suddenly break.
There are methods to control the noise and vibration of the retaining frame; Use lubricants with good lubrication performance; Reduce installation errors of bearings; Compressing the radial clearance of the bearing or appropriately pre tightening it in the axial direction, and selecting IMCB bearings with a well precision and structurally reasonable cage, or replacing them with bearings with a firm and unworn cage.
(2) Vibration ripple sound and its control method Vibration ripple sound is a type of noise directly related to the waviness of the rolling surface of IMCB bearings. It is a pure tone noise, and its frequency remains constant for a constant speed, while its frequency changes with changing speeds.