What is bearing clearance?Bearing clearance standard?How to adjust bearing clearance

Bearing clearance is also called bearing clearance.The so-called bearing clearance refers to the amount of movement when the bearing is not installed on the shaft or bearing box, and the one side of the inner ring or outer ring is fixed, and then the one side of the bearing clearance is not fixed does radial or axial movement.According to the direction of movement, it can be divided into radial clearance and axial clearance.The size of operating clearance (called working clearance) affects the rolling fatigue life, temperature rise, noise, vibration and other properties of bearings.

Bearing clearance standard is not regulated by the state. It depends on the use situation: it is still quite a complicated problem, which can be summarized as follows:

I. Selection principle of gap:

1. When tight fit is used, the temperature difference between inner and outer rings is large, friction torque needs to be reduced, deep groove ball bearings bear large axial load or self-aligning performance needs to be improved, large clearance group should be used.

2. When the rotation accuracy is high or the axial displacement needs to be strictly limited, the group with small clearance should be adopted.

Ii. Factors related to clearance:

1, bearing inner ring and shaft matching.

2. Matching of bearing outer ring and shell hole.

3, the impact of temperature.

Note: the reduction of radial clearance is related to the actual effective interference of the matching parts, the size of the matching shaft diameter and the wall thickness of the shell hole.

Feeling method

1, there are hand rotating bearings, bearings should be smooth and flexible without jamming phenomenon.

2. Shake the outer ring of the bearing b