About motor bearing clearance
●The radial (axial) clearance of the bearing is the radial direction (axial direction) of one set of rings relative to the other ring, moving from a radial (axial) limit position to the opposite limit position when the bearing has no external load. )distance. In reality, due to the shape error of the ferrule and the inconsistency of the rolling elements, it should be averaged in the radial direction (axial) displacement in different directions of the ferrule and in different relative positions of the ferrule and the rolling element.
● Clearance is an important technical parameter of the bearing, which directly affects the bearing performance, vibration, noise, friction, temperature rise, service life and mechanical running accuracy.
a) If the clearance is too large, the bearing area inside the bearing will be reduced, the contact surface stress will increase, and the service life will be shortened. Excessive clearance will also reduce bearing running accuracy and increase vibration and noise.
b) If the clearance is too small, a negative play (over-interference) may occur in actual operation, causing frictional heat to increase, and the temperature rise is increased, thereby making the effective clearance smaller or the interference is larger, so the vicious cycle will result in The bearing is locked.
