Technical Data ANSI/AFBMA Std 10-1989 (Revision of 1983)

 

Tolerances by Grade for Individual Balls

VDws Rw Ra
Ball Grade Allowable Ball
Diameter Variation
Allowable
Deviation From
Spherical Form
Maximum
Surface Roughness
Arithmetic Average
Inch
3 .000003 .000003 0.5
5 .000005 000005 0.8
10 .000010 .000010 1
16 .000016 .000016 1
24 .000024 .000024 2
48 .000048 .000048 3
100 .0001 .0001 5
200 .0002 .0002 8
500 .0005 .0005 *
1000 .001 .001 *
Metric um
3 0.08 0.08 0.012
5 0.13 0.13 0.02
10 0.25 0.25 0.025
16 0.4 0.4 0.025
24 0.6 0.6 0.05
48 1.2 1.2 0.08
100 2.5 2.5 0.125
200 5 5 0.2
500 13 13 *
1000 25 25 *

 

Tolerances by Grade for Lots of Balls

VDwt S
Allowable lot
Diameter
Variation
Nominal Ball
Diameter
Tolerance
Allowable Ball Guage
Deviation

High Low
Container
Marking
Increment
Inch
.000005 * +.000030 -.000030 .000010
.000010 * +.000050 -.000040 .000010
.000020 * +.000050 -.000040 .000010
.000032 * +.000050 -.000040 .000010
.000048 * +.000100 -.000100 .000010
.000096 * * .00005
.0002 ±.0005 *
.0004 ±.001 *
.001 ±002 *
.002 ±.005 *
Metric um
0.13 * +0.75 -0.75 0.25
0.25 * +1.25 -1.00 0.25
0.5 * +1.25 -1.00 0.25
0.8 * +1.25 -1.00 0.25
1.2 * +2.50 -2.50 0.25
2.4 * * 1.25
5 ±12.5 *
10 ±25 *
25 ±50 *
* * * *