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Shanghai Ju Peng Bearing Co., Ltd.

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SKF standard for judging the cleanliness, maintenance and damage of bearings in Shanghai 2020-04-13 08:03:19

Although the SKF Bearing has the characteristics of high performance, it may be damaged as part of the machine, so some correct methods can extend the service life to a certain extent.
1. Cleaning of SKF bearings
When removing the imported bearing for maintenance, first record the appearance of the SKF Bearing, confirm the remaining amount of the lubricant, and clean the bearing after the sampling lubricant is inspected.
As a detergents, gasoline and kerosene are usually used.  
The cleaning of bearing disassembly is divided into coarse cleaning and fine fine cleaning. First, put them in the container, then put the bottom of the wire mesh pad first, so that the SKF Bearing will not directly touch the dirt of the container.
In the rough cleaning process, if the bearing rotates with the dirt, it will damage the rolling surface of the bearing, so it should be at heart.
In crude oil, remove grease and attachments with brush. After general cleaning, please carry out fine cleaning.  
Fine cleaning is to clean the bearings carefully while cleaning the oil.
In addition, clean oil should also be kept clean.  
2. Maintenance of bearings
In order to determine whether the SKF Bearing can be reused, the SKF Bearing and raceway surface should be cleaned, the rolling surface, the matching surface, the wear of the cage, the increase of the bearing clearance, and whether there is any correlation.
The abnormality of damage and dimensional accuracy.
For non detached ball SKF bearings, use one hand to support the inner ring horizontally, then rotate the outer ring to confirm whether it is smooth or not.  
Separate imported bearings, such as tapered roller bearings, can inspect raceway surfaces of rolling bodies and outer rings respectively.  
Since large bearings can not be rotated by hand, please pay attention to checking the appearance of rolling elements. The higher the importance of SKF bearings, the more careful the inspection is required.
3. Criteria for determining whether bearings are damaged
Whether it can be reused is judged by considering the extent of SKF Bearing Damage, mechanical properties, importance, working conditions and maintenance until next time.
However, if the following defects can no longer be used, new bearings must be replaced:
1 there are cracks or notched elements and cages in the inner ring, outer ring and rolling body.
2 there are faults on any ring and rolling element.
3 raceway surface, ribs and rolling elements;
4 the cage is obviously worn out or the rivet is obviously slack.
5 corrosion and damage to raceway surface and rolling body;
6 there are serious dents and scratches on the raceway surface and rolling body.
7 the inner diameter of the inner ring or the outer diameter of the outer ring.
8 obvious discoloration caused by heat;
9 seal grease SKF Bearing, seal ring or dust cover is obviously damaged.