NTN Bearing mass production of mechanical parts, and manufacturing precision is very strict, technically a high degree of specialization, for bearing varieties most readily available, it should be more cost-effective to buy than repair, only in the following circumstances, before considering the bearing fix the problem, namely:
 
(1) large factories use the same type of bearing failure is mainly rolling surface wear, fatigue or micro-abrasion, especially damaged parts still mostly cage or rolling elements, and rings or washers repair value;
 
(2) large and extra large bearings, to the brink of failure, or failure Although and parts no significant damage, or precious NTN bearings must try to extend its useful life;
 
(3) some really difficult to buy into the bearing varieties, failure spare parts had to repair, especially imported bearings;

(4) bearing a slight injury, such as inventory produced during the mild water rust, as well as minor fretting abrasion during transport, such cases repair and wasteful to discard.



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