Rolling bearing import, if there is no wrong choice can be used correctly, to the service life of imported bearings, can be used for a long time.On the other hand, there are unexpected injury earlier, and yield to the early damage of use, as the reasons of early damage, not enough to use scare the consideration on the lubrication and, in turn, and foreign invasion, the error of the bearing assembly and axis deflection of big, not enough research on shaft and bearing box, etc.It can be said that these reasons the situation more overlap each other.So, want to use machine to fully understand the bearing, conditions of use, bearing outer structure based on, if we can find out before and after the accident situation, again according to the damage of the bearing and a variety of reasons, can prevent the similar accidents from happening again