Causes of heating of rolling bearings and their elimination

Low bearing accuracy: Use bearings with specified accuracy levels.
The main shaft is bent or the box hole is not concentric: repair the main shaft or box.
Poor lubrication: Use the specified grade of lubrication material and clean it properly.
Low assembly quality: improve assembly quality.
Bearing inner and outer ring: Replace the bearing and related wear parts.
The axial force is too large: cleaning and adjusting the gap of the seal ring is required between 0.2 and 0.3mm, correcting the diameter of the impeller balance hole and verifying the static balance value.
Damaged bearing: Replace the bearing.