In order to meet the needs of international customers,
we can manufacture steel balls regulated by international standards or multinational
standards,even by our customers' enterprise standards.
International Standards: ISO3290-1998
Grade
Vdws
△Sph
Ra
Vdwl
Gauge space
Gauge
Sub-gauge space
Sub-gauge
3
0.08
0.08
0.01
0.13
0.5
-5,…-0.5,0,+0.5…+5
0.1
-0.2,-0.1,0,+0.1,+0.2
5
0.13
0.13
0.01
0.25
1
-5,…-0.5,0,+0.5…+5
0.2
-0.4,-0.2,0,+0.2,+0.4
10
0.25
0.25
0.02
0.5
1
-9,…-1,0,+1…+9
0.2
-0.4,-0.2,0,+0.2,+0.4
16
0.4
0.4
0.03
0.8
2
-10,…-2,0,+2…+10
0.4
-0.8,-0.4,0,+0.4,+0.8
20
0.5
0.5
0.03
1
2
-10,…-2,0,+2…+10
0.4
-0.8,-0.4,0,+0.4,+0.8
24
0.6
0.6
0.04
1.2
2
-12,…-2,0,+2…+12
0.4
-0.8,-0.4,0,+0.4,+0.8
28
0.7
0.7
0.05
1.4
2
-12,…-2,0,+2…+12
0.4
-0.8,-0.4,0,+0.4,+0.8
40
1
1
0.06
2
4
-16,…-4,0,+4…+16
0.8
-1.6,-0.8,0,+0.8,+1.6
60
1.5
1.5
0.08
3
6
-18,…-6,0,+6…+18
1.2
-2.4,-1.2,0,+1.2,+2.4
100
2.5
2.5
0.1
5
10
-40,…-10,0,+10…+40
2
-4,-2,0,+2,+4
200
5
5
0.15
10
15
-60,…-15,0,+15…+60
3
-6,-3,0,+3,+6
500
12.5
12.5
-
25
-
-
-
-
1000
25
25
-
50
-
-
-
-
American Standards:AFBMA 10-1983
Grade
Vdws
△Rw
Ra
Vdwl
Range of tolerance
△S
Gauge space
Gauge
3
0.08
0.08
0.01
0.13
-
+0.75
-0.75
1
-8,…-1,OK,+1,…+8
5
0.13
0.13
0.02
0.25
-
+1.25
-1
1
-8,…-1,OK,+1,…+8
10
0.25
0.25
0.03
0.5
-
+1.25
-1
2
-10,…-2,OK,+2,…+10
16
0.4
0.4
0.03
0.8
-
+1.25
-1
2
-10,…-2,OK,+2,…+10
24
0.6
0.6
0.05
1.2
-
+2.5
-2.5
2
-12,…-2,OK,+2,…+12
48
1.2
1.2
0.08
2.4
-
-
-
4
-16,…-4,OK,+4,…+16
100
2.5
2.5
0.13
5
+/-12.5
-
-
-
-
200
5
5
0.2
10
+/-25
-
-
-
-
500
13
13
-
25
+/-50
-
-
-
-
1000
25
25
-
50
+/-125
-
-
-
-
German Standards:DIN5401
Grade
Dia.from
to
Vdws
Tolerance
Gauge space
Gauge
Grade(ISO)
Ⅰ
10
0.25
+/-10.25
0.5
-10,…-0.5,0,+0.5,…+10
5
Ⅱ
25
0.5
+/-10.5
1
-10,…-1,0,+1,…+10
10
Ⅲ
25
1
+/-11
2
-10,…-2,0,+2,…+10
20
25
50
1.5
+/-13.5
3
-12,…-3,0,+3,…+12
28
50
75
2
+/-14
4
-10,…-0.5,0,+0.5,…+10
40
75
100
2.5
+/-17.5
5
-15,…-5,0,+5,…+15
40
100
125
3
+/-21
6
-18,…-6,0,+6,…+18
100
125
150
3.5
+/-24.5
7
-21,…-7,0,+7,…+21
100
Ⅳ
10
2
+/-14
4
-12,…-4,0,+4,…+12
40
Ⅴ
25
25
+/-75
50
-50,0,+50
500
25
50
38
+/-113
75
-75,0,+75
500
50
75
50
+/-150
100
-100,0,+100
500
75
100
63
+/-188
125
-125,0,+125
500
100
125
75
+/-225
150
-150,0,+150
500
125
150
88
+/-263
175
-175,0,+175
500
Ⅵ
all
-
+/-200
400
-
600
Ⅶ
all
-
-
-
-
700
Chinese Standards:GBC308-200
Grade
Vdws
△Sph
Ra
Vdwl
Gauge space
Gauge
Sub-gauge space
Sub-gauge
3
0.08
0.08
0.01
0.13
0.5
-5,…-0.5,0,+0.5…+5
0.1
-0.2,-0.1,0,+0.1,+0.2
5
0.13
0.13
0.014
0.25
1
-5,…-0.5,0,+0.5…+5
0.2
-0.4,-0.2,0,+0.2,+0.4
10
0.25
0.25
0.02
0.5
1
-9,…-1,0,+1…+9
0.2
-0.4,-0.2,0,+0.2,+0.4
16
0.4
0.4
0.025
0.8
2
-10,…-2,0,+2…+10
0.4
-0.8,-0.4,0,+0.4,+0.8
20
0.5
0.5
0.032
1
2
-10,…-2,0,+2…+10
0.4
-0.8,-0.4,0,+0.4,+0.8
24
0.6
0.6
0.04
1.2
2
-12,…-2,0,+2,..+12
0.4
28
0.7
0.7
0.05
1.4
2
-12,…-2,0,+2…+12
0.4
-0.8,-0.4,0,+0.4,+0.8
40
1
1
0.06
2
4
-16,…-4,0,+4…+16
0.8
-1.6,-0.8,0,+0.8,+1.6
60
1.5
1.5
0.08
3
6
-18,…-6,0,+6…+18
1.2
-2,-1.2,0,+1.2,+2
100
2.5
2.5
0.1
5
10
-40,…-10,0,+10…+40
2
-4,-2,0,+2,+4
200
5
5
0.15
10
15
-60,…-15,0,+15…+60
3
-6,-3,0,+3,+6
