Bearings Tolerances Bearings Tolerances

9

Tolerances for bearingsBearing tolerances and permissible values for the boundary dimensions and running accuracy of bearings are specified. These values are prescribed in JIS B 1514 “tolerances for rolling bearings.” (These JIS standards are based on ISO standards.)Bearing tolerances are standardized by classifying bearings into the following six classes (accuracy in tolerances becomes higher in the order described): 0, 6X, 6, 5, 4 and 2.

Dimensional accuracyDimensional accuracy constitutes the acceptable values for bore diameter, outer diameter, assembled bearing width, and bore diameter uniformity as seen in chamfer dimensions, allowable inner ring tapered bore deviation and shape error. Also included are, average bore diameter variation, outer diameter variation, average outer diameter unevenness, as well as raceway width and height variation (for thrust bearings).

Running accuracyRunning accuracy constitutes the acceptable values for inner and outer ring radial runout and axial runout, inner ring side runout, and outer ring outer diameter runout. Allowable rolling bearing tolerances have been established according to precision classes. Bearing precision is stipulated as JIS class 6, class 5, class 4, or class 2, with precision rising from ordinary precision indicated by class 0.

Table a

Table b

Table c

Table d

Table e

Bearings Tolerances Bearings Tolerances

10

Bearings Tolerances Bearings Tolerances

11

Table aTable a.1

Table a.2

Bearings Tolerances Bearings Tolerances

10

Bearings Tolerances Bearings Tolerances

11

Bearings Tolerances Bearings Tolerances

12

Bearings Tolerances Bearings Tolerances

13

Table bTable b.1

Table b.2

Table b.3

Bearings Tolerances Bearings Tolerances

12

Bearings Tolerances Bearings Tolerances

13

Bearings Tolerances Bearings Tolerances

14

Bearings Tolerances Bearings Tolerances

15

Table cTable c.1

Table c.2

Table dTable d.1

Bearings Tolerances Bearings Tolerances

14

Bearings Tolerances Bearings Tolerances

15

Table d.2

Table d.3

Table eTable e.1

Table e.2