To determine whether the bearing is damaged, these tips must be used
During regular inspections of bearings, if any part of the bearing is damaged, the bearing cannot be used again, that is, it needs to be replaced with a new bearing.
1. There are cracks or fragments in any of the inner and outer rings, rolling elements, and cages.
2. Any of the inner and outer rings or rolling elements is peeled off.
3. The raceway surface, ribs and rolling elements are obviously damaged.
4. The cage is severely worn or the rivets are loose.
5. The raceway surface and rolling elements are rusty and scratched.
6. There are obvious indentations and scratches on the rolling surfaces and rolling elements.
7. There is creep on the inner diameter surface of the inner ring or the outer diameter of the outer ring.
8. Severe discoloration due to overheating.
9. The sealing ring and dust cover of the grease-sealed bearing are seriously damaged.
During the operation of the bearing, how to identify whether the bearing is damaged? There are three main identification methods:
1. Recognition by voice
Recognition by voice requires extensive experience. Sufficient training is required to be able to distinguish bearing sounds from non-bearing sounds. For this reason, this work should be carried out by dedicated personnel whenever possible. Use a listening device or listening stick to the shell to clearly hear the sound of the bearing.
2. Identification by working temperature
This method is a comparative identification method and can only be used in situations where the operating status does not change much. For this purpose, continuous recording of the temperature is necessary. When a fault occurs, not only does the temperature increase, but also irregular changes occur.
3. Identification by lubricant status
Sampling and analyzing the lubricant will determine whether the degree of contamination is mixed with foreign matter or metal powder. This method is particularly effective for bearings or large bearings that cannot be observed closely.
