Bearing clearance parameter

Bearing clearance parameter

Bearing clearance is also known as bearing clearance, the so-called bearing clearance, that is, when the bearing is not installed in the shaft or bearing box, the inner ring or outer ring is fixed on one side, and then the bearing is not fixed on the side to do radial or axial movement. According to the direction of movement, it can be divided into radial clearance and axial clearance.

The size of the bearing running clearance (called working clearance) has an impact on the rolling fatigue life, temperature rise, noise, vibration and other performance of the bearing. When measuring the clearance of the bearing, in order to obtain a stable measurement value, the specified measurement load is generally applied to the bearing. Therefore, the measured value obtained is larger than the real clearance (called theoretical clearance), that is, the amount of elastic deformation generated by the measured load is increased. However, for roller bearings, because the elastic deformation is small, it can be ignored. The internal clearance of the bearing before installation is generally expressed by the theoretical clearance.