NEWS CENTER

Bearing clearance

2016-03-24

Bearing internal clearance refers to the total distance of radial movement of one bearing ring relative to another bearing ring (radial internal clearance) or the total distance of axial movement (axial internal clearance).

Working clearance refers to the clearance under the actual operating conditions of the bearing. The original clearance refers to the clearance before the bearing is installed.

The clearance value is divided into three groups according to the size, one group is the basic group (or called the normal group), the small clearance group (C2), and the large clearance group (C3, C4). There is also a special CM group (special clearance for the motor).

Under normal working conditions, the basic group should be selected first;

The large clearance group is suitable for large interference between the inner and outer rings, or the temperature difference between the inner and outer rings is large, the deep groove ball bearing needs to bear a larger axial load or needs to improve the self-aligning performance, or needs to increase the limit speed of the bearing and reduce it. Bearing friction torque and other occasions

The small clearance group is suitable for the occasions with higher rotation accuracy, strict control of the axial displacement of the housing hole, and the need to reduce vibration and noise.