Bearing Inspection And Judgment

In order to determine whether the removed bearings can be reused, it is important to focus on checking their dimensional accuracy, rotational accuracy, internal clearance, mating surfaces, raceway surfaces, retainers, and sealing rings. Due to the inability to rotate large bearings by hand, attention should be paid to inspecting the appearance of rolling elements, raceway surfaces, cages, and retaining surfaces. The higher the importance of bearings, the more careful they need to be inspected.
Causes and troubleshooting methods of rolling bearing heating
Low bearing accuracy: Select bearings with specified accuracy levels.
Spindle bent or box holes not concentric: Repair the spindle or box.
Poor lubrication: Use lubricating materials of the specified brand and clean them appropriately.
Low assembly quality: Improve assembly quality.
Bearing inner casing running: Replace the bearing and related worn parts.
Excessive axial force: The clearance between the cleaning and adjusting sealing ring should be between 0.2 and 0.3mm. Correct the diameter of the impeller balance hole and verify the static balance value.
Bearing damage: Replace the bearing.