Causes of rolling bearing heating and its elimination


Bearing accuracy is low: bearings with specified accura […]

Bearing accuracy is low: bearings with specified accuracy grades are selected.

The spindle is bent or the hole in the case is not the same: repair the spindle or the case.

Poor lubrication: Use the specified grade of lubricant and clean it properly.

Low assembly quality: improved assembly quality.

Bearing inner casing running ring: replace the bearing and related wear parts.

The axial force is too large: cleaning and adjusting the gap of the sealing ring is required to be between 0.2 and 0.3 mm, correcting the balance hole diameter of the impeller and verifying the static balance value.

Bearing damage: Replace the bearing.


The bearings are coated with an appropriate amount of anti-rust oil and packaged with anti-rust paper. As long as the package is not damaged, the quality of the bearing will be guaranteed. However, in the long-term storage, it is recommended to store on a shelf 30cm above the ground under the condition of humidity below 65% and temperature of about 20 °C. In addition, the storage place should avoid direct sunlight or contact with cold walls.