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Conversion Chart Weight List of Steet Ball Size
Diameter
Per1000pcs
No.of ball per kg
Diameter
Per1000pcs
No.of ball per kg
Diameter
Per1000pcs
No.of ball per kg
mm in
Weight(kg)
about
mm in
Weight(kg)
about
mm in
Weight(kg)
about
0.5000
0.00051
1960780
8.0000
2.09
478
20.6370 13/16
35.8
27.9
0.6800
0.00128
781250
8.5000
2.50
400
21.0000
37.75
26.49
0.8000
0.00209
478470
8.7312 11/32
2.71
369
21.4313 27/32
40.1
24.9
1.0000
0.00408
245100
9.0000
2.97
337
22.2250 7/8
44.8
22.3
1.2000
0.00705
141840
9.5250 3/8
3.52
284
23.0000
49.59
20.17
1.3000
0.00893
111980
10.0000
4.08
245
23.0188 29/32
49.8
20.1
1.4500
0.0124
80645
10.3188 13/32
4.48
223
23.8125 15/16
55.1
18.2
1.5880 1/16
0.016
62350
11.0000
5.42
185
24.0000
56.34
17.75
1.7500
0.0218
45871
11.1125 7/16
5.60
179
24.6063 31/32
60.8
16.5
2.0000
0.0326
30700
11.5000
6.22
161
25.0000
63.68
15.70
2.3812 3/32
0.055
18182
11.5094 29/64
6.22
161
25.40000 1
66.8
15
2.5000
0.0637
15698
11.9062 15/32
6.88
145
26.1938 11 /32
73.3
13.46
3.0000
0.110
9091
12.0000
7.04
142
26.9875 11 /16
80.2
12.47
3.1750 1/8
0.131
7634
12.3031 31/64
7.60
132
27.7812 13/32
87.4
11.4
3.5000
0.175
5717
12.7000 1/2
8.35
120
28.0000
89.47
11.18
3.9688 5/32
0.255
3922
13.4938 17/32
10.0
100
28.5750 11/8
95.2
10.50
4.0000
0.261
3831
14.0000
11.18
89
30.1625 13/16
112
8.93
4.7625 3/16
0.441
2268
14.2875 9/16
11.9
84.0
5.0000
0.510
1961
15.0812 19/32
14.0
71.4
5.1594 13/64
0.560
1786
15.8750 5/8
16.3
61.3
5.5562 7/32
0.699
1431
16.0000
16.69
59.9
5.9531 15/64
0.860
1163
16.6688 21/32
18.9
52.9
6.0000
0.881
1136
17.0000
20.02
50
6.3500 1/4
1.04
962
17.4625 11/16
21.7
46.1
6.5000
1.119
894
18.2562 23/32
24.8
40.3
6.7469 17/64
1.25
800
19.0000
27.96
35.77
7.1438 9/32
1.49
671
19.0500 3/4
28.2
35.5
7.9372 5/16
2.04
490
19.8438 25/32
31.9
31.4
Tolerance Gageles&T echnical Demands
Grade
ball diameter variation
deviation from spherical ftom
surface roughness
lot diameter variation
nominal ball deviation tolerance
Vdws
△sph
Ra
Vdwl
Tdn
not over
um
10
0.25
0.25
0.025
0.5
*
16
0.4
0.4
0.032
0.8
*
20
0.5
0.5
0.04
1
*
28
0.7
0.7
0.05
1.4
*
40
1.0
1.0
0.08
2
*
60
1.5
1.5
0.10
3
*
100
2.5
2.5
0.125
5
±12.5
200
5
5
0.2
10
±25
500
13
13
*
25
±50
1000
25
25
*
50
±125
Technical Conditions of Vibration
精度等级
钢球直径
G20
G16
G10G5G3
Z1
Z2
Z3
over
to
average
max
average
max
average
max
4.5
6.5
39.5
41.5
37.5
39.5
35.5
37.5
6.5
7.5
40
42
38
40
36
38
7.5
10
40.5
42.5
38.5
40.5
36.5
38.5
10
11
42
44
40.5
42.5
38.5
40.5
11
12
42.5
44.5
41
43
39
41
12
13
43
45
41.5
43.5
39.5
41.5
13
14
43.5
45.5
42
44
40
42
14
15
44
46
42.5
44.5
40.5
42.5
15
16
44.5
46.5
42.5
44.5
40.5
42.5
16
17
45
47
43
45
41
43
17
17.5
45.5
47.5
43
45
41
43
Lot Diameter Variation and Normal Gauge,Subgauge
Grade
lot diameter variation
gauges interval
preferred gauges
subguage interval
subguages
10
0.5
1
-9,...,-1,0,+1,...,+9
0.2
-0.4,-0.2,0,+0.2,+0.4
16
0.8
2
-10,...,-2,0,+2,...,+10
0.4
-0.8,-0.4,0,+0.4,+0.8
20
1
2
-10,...,-2,0,+2,...,+10
0.4
-0.8,-0.4,0,+0.4,+0.8
28
1.4
2
-12,...,-2,0,+2,...,+12
0.4
-0.8,-0.4,0,+0.4,+0.8
40
2
4
-16,...,-4,0,+4,...,+16
0.8
-1.6,-0.8,0,+0.8,+1.6
60
3
5
-20,...,-5,0,+5,...,+20
1
-2,-1,0+1,+2