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

ABMA Standard

AMBA Grade DIN Grade Deviation from Spherical Form Lot Diameter Variation Allowable Ball Gauge Variation Nominal Ball Diameter Tollerance Marking Increments Max surface Roughness in Micro-inches “Ra”
3 .000003 ± .000003 ± .000003 ± .000010 .5
5 .000005 ± .000005 ± .000005 ± .000010 .8
10 I .000010 ± .000010 ± .000010 ± .000010 1.0
25 II .000025 ± .000025 ± .000010 2.0
50 III .000050 ± .000050 ± .0002 ± .000050 3.0
100 IV .0001 ± .0001 ± .0005 5.0
200 .0002 ± .0002 ± .0010 8.0
500 .0003 ± .0003 ± .0025
1000 V .0004 ± .0004 ± .0050

ABMA Standard

AMBA Grade DIN Grade Deviation from Spherical Form Lot Diameter Variation Allowable Ball Gauge Variation Nominal Ball Diameter Tollerance Marking Increments Max surface Roughness in Micro-inches “Ra”
3 .000003 ± .000003 ± .000003 ± .000010 .5
5 .000005 ± .000005 ± .000005 ± .000010 .8
10 I .000010 ± .000010 ± .000010 ± .000010 1.0
25 II .000025 ± .000025 ± .000010 2.0
50 III .000050 ± .000050 ± .0002 ± .000050 3.0
100 IV .0001 ± .0001 ± .0005 5.0
200 .0002 ± .0002 ± .0010 8.0
500 .0003 ± .0003 ± .0025
1000 V .0004 ± .0004 ± .0050