The total distance that a certain ring of a bicycle bearing ball can move in a certain direction relative to another set of rings can be effectively divided into radial clearance and axial clearance according to the moving direction during operation, and must be installed. The internal clearance of the front bearing is distinguished from the internal clearance (running clearance) of the bearing when the operating temperature is reached after installation.
The original internal clearance of the bicycle bearing ball is usually greater than the running clearance. This is due to the difference in the degree of fit involved in the mounting fit. The difference in thermal expansion between the inner and outer rings of the bearing and the related components causes the inner and outer rings to expand or contract.
The internal clearance of the bicycle bearing ball and the specified value
The internal clearance (also called the clearance) of the rolling bearing of the bicycle bearing ball has a great influence on the bearing performance such as fatigue life, vibration, noise, and temperature rise.
Therefore, the internal clearance of the bearing is selected during the operation, which is an important research item for the bearing that determines the structural size. Generally, to obtain a stable test value, the specified test load is given to the bearing, and then the clearance is tested. Therefore, the measured clearance value is larger than the theoretical clearance (in the radial clearance, also called the geometric clearance), that is, one more elastic deformation due to the test load (called the test clearance). Show the difference)