Bearing accuracy and level of choice
Rolling accuracy of points (mainly) dimensional accuracy and rotational accuracy. Accuracy class has been standardized, divided into P0 level, P6 class, P5 level, P4-class, P2 Level 5 rating.
Accuracy in turn increase starting from 0, for general purpose 0 is sufficient, but for the conditions or situations shown in Table 1, we need 5 or higher accuracy.
Although the accuracy of the above rating is based on ISO standards for benchmarking, but its a term used in national standards are different.
Table 2 lists the various types of bearings for the accuracy of grades as well as comparisons between national standards.
Dimensional accuracy (with the shaft and casing installation-related items)
1, inner diameter, outer diameter, width and assembly width of the allowable deviation
2, roller group re-re-circle diameter and outer diameter of the allowable deviation
3, the allowed limits of the value of chamfer dimension
4, the width of the allowed variation
Rotation accuracy (with the rotating body of beating-related projects)
1, inner ring and outer ring radial runout and axial runout allowed
2, inner ring of the permit horizontal beating
3, outer diameter to allow changes in the amount of surface tilt
4, the thickness of thrust bearing raceway to allow changes in the amount of
5, tapered hole and allow changes in the amount of allowable deviation
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