The bearing looks good, but there are pits in the raceway.
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Vertical motor (level 4) 1440RPM, 3# lithium grease, the grease on the inner and outer rings of the bearing is good, but there are pits in the inner ring of the bearing. What are the common causes of this situation?
Does it look like an arc injury? Most of the phenomena that usually occur are impurities in the grease, violent rotation, overloading, etc. For reference.
It is more likely to consider bearing quality problems
I'm so lucky that it didn't get burned or discolored.
Judging from the picture, it should be caused by oil quality problems and overloading. It is recommended to replace or replace the lubricating oil regularly and check whether there is overloading.
1. There are defects in the material of the outer ring of the bearing, and slag is prone to occur under high-speed operation. 2. Impurities in the lubricating oil/grease enter the contact surface, causing damage. 3. Lubricating oil/grease quality problems, or water content, cause corrosion. 4. Large vibrations generated in other parts of the pump cause damage to the bearing.