COMBALLS GROUP.
Qingdao ,266061, China
http://www.comballs.com
Phone: +86 532 88961235/88961237/88961238;Fax:+86 532 88961236 / 83883615
sales@comballs.com

Steel Balls ANSI/AFBMA Standard

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

  VDws ∆Rw Ra
Ball Grade Allowable Ball
Diameter Variation		 Allowable
Deviation From
Spherical Form		 Maximum Surface
Roughness
Arithmetic Average
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 *
Inch
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 *
Metric um
VDwt   ∆S  
Allowable lot
Diameter
Variation		 Nominal Ball
Diameter
Tolerance		 Allowable Ball Guage
Deviation
High
Low
Container
Marking
Increment
.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 *  
Inch
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 *  
       
Metric um