Matters needing attention about NTN bearing preventive maintenance - bearing knowledge

For NTN bearing equipment preventive maintenance, and peripheral parts replacement operation were removed, NTN bearing to check to determine whether NTN bearing parts in turn can be used again and record the usage of good from bad. Will carefully investigate and record the NTN bearing and the appearance of being removed. In order to explore the residual amount of investigation and lubricant, after sampling, to clean the NTN bearing well. Second check NTN bearing raceway surface, rolling surface and cooperate with the surface condition and wear conditions of cage with and without damage to watch the race and abnormal situation especially the running track. Judgment NTN bearing can use again, and the extent of the damage to considering the NTN bearing, machine performance, importance, and operation conditions, such as inspection period to decide later. Test results, if found damage and NTN bearing abnormal situation, please according to the NTN bearing damage phenomenon to find out the reason, to develop countermeasures. In addition, the test results, there are some defects, if can't use the NTN bearing, need to replace new NTN bearing. 一个。 Inner and outer ring, rolling body, to keep any of them are cracks and debris. b。 Inner and outer ring, rolling body any one strip. c。 Raceway surface, guard, significant injury of roller. d。 Maintains a badly worn or loose rivet badly. e. Raceway surface, rust and roller has a scar. f。 Had a remarkable indentation rolling surface, rolling body and make a mark. g。 Inner ring diameter or outer diameter on the creep. h。 Discoloration of overheating. 我。 NTN bearing grease seal ring and dust cover damage to serious.