The measurement is carried out by the press lead method and the feeler gauge method. The translation of the radial clearance is not marked in the bearing code. The clearance of the bearing is different according to the size of its inner diameter. Look-up table to determine that under normal circumstances, the radial clearance of the rolling bearing cannot be greater than 3‰ of the inner diameter of the bearing, and the radial clearance of the radial short cylindrical bearing cannot be greater than 2‰ of the inner diameter of the bearing.

The clearance of the bearing is also called bearing clearance.

Bearing clearance is the amount of movement when the bearing is not installed on the shaft or bearing box, the inner ring or outer ring of the bearing is fixed, and then the side that is not fixed is convenient for radial or axial movement. According to the direction of movement, it can be divided into radial clearance and axial clearance.

Radial clearance: In no load, when a ferrule is fixed, the other ferrule is relative to the fixed ferrule along the radial direction from one position to another position.

Axial clearance: In no load, when a ferrule is fixed, the other ferrule relative to the fixed ferrule along the axial movement from one position to another position.