Causes of bearing heating and its elimination methods

The shaft parts of machine tools, especially the main shaft, are generally assembled with bearings or sliding bearings and rotate at a high speed, sometimes generating high heat. If this phenomenon is not eliminated in time, it will cause the bearing to overheat, and cause the temperature of the corresponding part of the machine tool to rise and produce thermal deformation. In severe cases, the machine tool spindle and the processed workpiece tailstock will not be equal in height, which it will not only affect the accuracy and processing accuracy of the machine tool itself. , but also it will burn the bearing. The reasons for the heating of the spindle bearing and its elimination are as follows.

Causes of bearing heating and its elimination methods

1. Reason: The bearing accuracy is low. Method: select bearings with specified accuracy class

2. Reason: The spindle is bent or the box hole is not concentric. Method: repair the spindle or box

3. Reason: The belt is too tight. Method: Adjust the belt to make it moderate tight

4. Reason: poor lubrication. Method: Use the lubricator of the specified brand and clean it appropriately

5. Reason: low assembly quality. Method: Improve assembly quality

6. Reason: The inner and outer ring of the bearing run laps. Method: Replace bearings and related wear parts

7. The axial force is too large. Method: Clean and adjust the gap between the seal ring and the required 0.2～0.3mm, correct the impeller balance hole diameter and check the static balance value

8. The bearing is damaged. Method: Replace the bearing