For the use of the bearing, must carry out regular maintenance and maintenance, when we have the size of the bearing, rotating accuracy, precision and internal internal clearance and mating surface, raceway surface, rolling surface, cage and sealing ring, if abnormal phenomenon, need to be repaired, or replaced. Whether to replace the bearings that can be used by bearing the judgement or master of bearing. To make mechanical equipment can be normal operation and work, we must to bearing the use of judgment, because the bearing damage will directly affect the normal use of mechanical equipment, the following Chinese bearing network tell you whether the bearing need to be better, can through the following two points are analyzed. 1, fracture and defect of bearing parts; 2 on the surface of the raceway surface or rolling strip.