Main reasons of the crack on FAG bearing
are as follows:
1、Damage Crack: the incorrect installation and uploading. There is no fixed and aid tools during the installation of FAG bearing, and it can be knocked directly with the hammer. The excessive or uneven force may both make the bearing crack on the edge and rib.
2、Fatigue Crack: the poor cnnection between the axle journal and inner hole or the bearing block and outer cylinder surface. In this way, the stress areas contact of raceways is uneven and the bearing ring and rolling body will bring out the crack.
3、Hard and Brittle Crack: this kind of crack is resulted from the poor quality during the production , the internal defect of material and the excessive hardness of heat treating.
4、Shaking Crack: the excessive impulsive load during the FAG use. The rolling FAG bearing ring and rolling body are usually made of high carbon chromium FAG bearing steel. Though it can bear heavy impulsive load with the high hardness of bearing ring and rolling body, the excessive impulsive load will make bearing shake strongly and lead to the damage and crack of FAG bearing.