Bearing inspection and judgment


In order to judge whether the removed bearing can be re […]

In order to judge whether the removed bearing can be reused, it is important to check its dimensional accuracy, rotation accuracy, internal clearance and mating surface, raceway surface, cage and sealing ring. Since large bearings cannot be rotated by hand, pay attention to check the appearance of rolling elements, raceway surfaces, cages, rib surfaces, etc. The higher the importance of the bearings, the more careful inspection is required.
Causes of rolling bearing fever and its elimination
Low bearing accuracy: Use bearings with specified accuracy grades.
The main shaft is bent or the hole of the box is not concentric: repair the main shaft or box.
Poor lubrication: Use the specified grade of lubricating material and clean it properly.
Low assembly quality: improve assembly quality.
Bearing inner and outer shell running ring: replace the bearing and related wear parts.
The axial force is too large: the clearance of the sealing ring needs to be cleaned and adjusted between 0.2 and 0.3mm, the diameter of the impeller balance hole is corrected, and the static balance value is verified.
Bearing damage: replace the bearing.
The bearings are coated with an appropriate amount of anti-rust oil and packed with anti-rust paper at the factory. As long as the packaging is not damaged, the quality of the bearing will be guaranteed. However, for long-term storage, it is appropriate to store on a shelf 30cm above the ground under conditions of humidity below 65% and temperature around 20℃. In addition, the storage place should avoid direct sunlight or contact with cold walls.