NSK bearing equipment preventive maintenance, operation and external parts to be removed when replacing bearings for inspection, requires in turn, determine whether the bearing can be used again and record the use of good and bad. Also to careful investigation and bearing and appearance of the records were removed. To identify and investigate the residual quantity of lubricant, after sampling, to clean it very well the bearings.
Second, check NSK bearing Raceway surface, rolling surfaces and surface condition and wear of the cage has no damage and abnormalities in particular, to observe the movements of Raceway surface. Judge the ball joint will use again, to consider the bearing of the extent of the damage, machine performance, importance, condition, inspection cycles later to decide.
Check the results, if NSK bearing damage and abnormalities are found, follow the phenomenon to identify cause of bearing damage, developing policy responses. Also, check the result, if there are several defects, joint bearings cannot be used again, new bearing needs to be replaced.
　　A. inside and outside the ring, rolling elements, cages of any one have crack and fragment.
　　B. inside and outside the ring, rolling elements either have split.
　　C. Raceway surface, rib, rolling a significant injury.
　　D. serious wear of the cage or rivets loose much.
　　E. rolling body Raceway surface, rust and scars.
　　F. There is significant pressure on the rolling surface and rolling mark and mark.
　　G. on the inner or outer ring outside diameter inner diameter surface creep.
　　H. overheating color ill.