Bearing accuracy

The precision of rolling bearing is divided into (main) ruler precision and rotation precision. The accuracy level has been standardized, which is divided into six levels: 0, 6X, 6, 5, 4 and 2.

The accuracy shall be raised from level 0 in turn. For general level 0, it is sufficient. However, if the accuracy is lower than the level in the following table, the accuracy of level 5 or higher is required. Although the above accuracy levels are based on ISO standards

It is formulated, but its name is different in national standards.

Accuracy of ruler (items related to the installation of bearing housing)

Allowable deviation of internal diameter, external diameter, width and assembly width

Allowable deviation of inner and outer circle diameters of rolling cylinder

Allowable limit value of inverted ruler

Allowable variation of width

Allowable deviation and allowable variation of conical hole

Rotation accuracy (items related to the runout of the rotating body)

Allowable radial and axial runout of inner and outer rings

Allowable lateral runout of inner ring

Allowable variation of inclination of outer diameterAllowable variation of the thickness of the roller path of the thrust bearing