Bearing Clearance

Clearance size table

The size of the inner membrane clearance (also known as the clearance) during the operation of the rolling bearing has a great influence on the fatigue life, vibration, noise, temperature rise, and other bearing performance. Therefore, choosing the internal clearance of the bearing is an important research project for the bearing that determines the structural size. The so-called clearance is the amount of clearance between the inner ring, outer ring, and rolling elements of the bearing. That is, the amount of movement when one of the inner ring or the outer ring is fixed, and the other ferrule is moved up and down or left and right. The amount of movement in the radial direction and the axial direction are called radial clearance and axial clearance, respectively. It is stipulated in the corresponding international and trickery standards.

The ceramic bearings and stainless steel bearings produced by our company (plastic bearings are required separately) are produced according to the following series of radial clearance standards (equivalent to international and international standards). The O group is the basic group (also known as the standard clearance), and it is supplied according to this series if no special instructions are given. Plastic bearings are produced in accordance with the axial clearance standard in Table 3. The plastic bearings produced by our company are limited by their own accuracy due to the stable dimensions of the plastic bearings. They are easily deformed by the shaft and housing during processing and installation, which will reduce the working clearance. It must be equipped with a relatively larger clearance during manufacture to ensure the normal use of the bearing.

⒈The radial clearance of ceramic bearings and stainless steel bearings

Table 1 Deep groove ball bearings (suitable for ceramic bearings and stainless steel bearings) (um)

Table 2 Self-aligning ball bearings (suitable for ceramic bearings and stainless steel bearings) (um)

2. Plastic bearing axial clearance

Table 3 Deep groove ball bearings (for plastic bearings)