The existence of clearance in the bearing is to ensure that the bearing can operate flexibly and without block, but at the same time, it is also required to ensure that the bearing runs smoothly, the axis of the bearing does not have significant settlement, and the number of rolling bodies to bear the load is as large as possible. Therefore, the clearance of bearings has a great impact on the dynamic performance (noise, vibration and friction), rotation accuracy, and the bearing capacity of service life (wear and fatigue) of bearings.

 

 

 

Too large clearance will cause a reduction in the number of rolling bodies under load at the same time, so that the load of a single rolling body increases, thus reducing the bearing rotation accuracy, reduce the service life; Too small clearance will increase the friction, increase the heat generated, aggravate the wear, also can reduce the service life of bearings. Therefore, many bearings should be strictly controlled and adjusted during assembly.