Finished bearing rings are not allowed grinding burns and grinding cracks exist, especially in the mating surfaces of the inner ring screwdriver should not burn. Ferrule if after pickling should be carried out all seized, bound by the burn products, severe burns can not rework or repair failed to be scrapped, does not allow the ring to enter the assembly process of grinding burn. Rings to steel storage before grinding, the process must be strict management and strict distinction between the different materials of materials and products GCr15 and GCr15SiMn two. 
    
NSK Bearings is able to determine all kinds need to consider the extent of the damage, the main consideration in this regard is the effect of the injury, the mechanical aspects of performance, the importance of installation conditions are to be considered, until the next overhaul the effect of the period, but for the defect is not in use must be the replacement of the bearing inner ring, outer ring, rolling body cage on any one crack gap is to pay attention to this also in this regard to maintain an effect. Sense techniques, the following is from eight to introduce rules.
    
Rolling withstand the load, the plastic deformation in the rolling element and raceway contact. When the load too heavy, the raceway surface formation of the plastic deformation pits, leaving the NSK Bearings in running a summer of intense vibration and noise.

So that the rolling element and raceway surface wear due to relative motion of the rolling element and raceway and dirt dust intrusion. The amount of wear, bearing clearance, noise, vibration increases, reducing the running accuracy of the NSK Bearings, and thus directly affect the accuracy of some host. Therefore to limit the life of NSK Bearings NSK Bearings, precision machinery available amount of wear.



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