Accuracy and precision of rolling bearings (mainly) size precision and rotation precision. Accuracy level has been standardized, is divided into 0, 6X, 6, 5, 4, six 2 grades.
Accuracy from 0 to improve the general use of 0 is sufficient, but in Table 1 as shown in conditions or occasions, the need for 5 or higher accuracy.
Although the accuracy level of the above is based on the ISO standard, but its name is different in the national standard.
Table 2 lists the accuracy levels for various types of bearings and the comparison between the various national standards.
Dimensional accuracy (related to the installation of shafts and housings)
1, inside diameter, outside diameter, width and assembly width of the allowable deviation
The allowable deviation of 2, and the outer diameter roller group round round diameter
3, the allowable limit value chamfer dimension
4, the width of the allowable change
Rotation precision (related to the rotation of the body of the project)
1, the inner and outer rings allow radial and axial
2, the inner ring of the allowable lateral beat
3, the outer diameter of the slope of the allowable change of momentum
4, the thrust bearing roller thickness of the allowable change
5, the allowable deviation of the cone hole and allow to change the momentum
