ABMA Standard 2018-04-11T13:37:52+00:00

ABMA Standard

AMBA GradeDIN GradeDeviation from Spherical FormLot Diameter VariationAllowable Ball Gauge VariationNominal Ball Diameter TolleranceMarking IncrementsMax surface Roughness in Micro-inches “Ra”
3.000003± .000003± .000003± .000010.5
5.000005± .000005± .000005± .000010.8
10I.000010± .000010± .000010± .0000101.0
25II.000025± .000025± .0000102.0
50III.000050± .000050± .0002± .0000503.0
100IV.0001± .0001± .00055.0
200.0002± .0002± .00108.0
500.0003± .0003± .0025
1000V.0004± .0004± .0050

ABMA Standard

AMBA GradeDIN GradeDeviation from Spherical FormLot Diameter VariationAllowable Ball Gauge VariationNominal Ball Diameter TolleranceMarking IncrementsMax surface Roughness in Micro-inches “Ra”
3.000003± .000003± .000003± .000010.5
5.000005± .000005± .000005± .000010.8
10I.000010± .000010± .000010± .0000101.0
25II.000025± .000025± .0000102.0
50III.000050± .000050± .0002± .0000503.0
100IV.0001± .0001± .00055.0
200.0002± .0002± .00108.0
500.0003± .0003± .0025
1000V.0004± .0004± .0050