GRADES, TOLERANCES & SPECIFICATIONS


TOLERANCES BY GRADE FOR BALLS (MICRO-INCHES)

Grade

Allowable Lot Diameter Variation

Allowable Ball Gage Deviation

Allowable Deviation From Spherical Form

Maximum Surface Roughness (Ra)

Basic Ordering Increment

Low

High

3

5

-30

+30

3

0.5

50

5

10

-40

+50

5

0.8

100

10

20

-40

+50

10

1.0

100

16

32

-40

+50

16

1.0

100

24

48

-100

+100

24

2.0

100

Metric sizes and tolerances are available by special order.

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