GB/T308-2002 钢球等级标准
轴承钢球标准
单位：微米
|
等 级
|
球直径变动量
V Dws max
|
球形误差
max
|
表面粗糙度
Ra max
|
球批直径变动量
V Dws max
|
|
G3
|
0.08
|
0.08
|
0.010
|
0.13
|
|
G5
|
0.13
|
0.13
|
0.014
|
0.25
|
|
G10
|
0.25
|
0.25
|
0.020
|
0.5
|
|
G16
|
0.4
|
0.4
|
0.025
|
0.8
|
|
G20
|
0.5
|
0.5
|
0.032
|
1
|
|
G24
|
0.6
|
0.6
|
0.040
|
1.2
|
|
G28
|
0.7
|
0.7
|
0.050
|
1.4
|
|
G40
|
1
|
1
|
0.060
|
2
|
|
G60
|
1.5
|
1.5
|
0.080
|
3
|
|
G100
|
2.5
|
2.5
|
0.100
|
5
|
|
G200
|
5
|
5
|
0.150
|
10
|
钢球硬度国家标准
|
球公称直径 Dw/mm
|
成品钢球硬度
HRC
|
|
|
超 过
|
到
|
|
|
－
|
30
|
61～66
|
|
30
|
50
|
59～64
|
|
50
|
－
|
58～64
|
钢球公称直径及重量
|
公称
|
直径
|
重量
(1000pcs)
|
公称
|
直径
|
重量
(1000pcs)
|
公称
|
直径
|
重量
(1000pcs)
|
|
0.5mm
|
0.5000
|
0.0002604
|
9/32
|
7.1438
|
1.483
|
13/16
|
20.6375
|
35.75
|
|
0.6mm
|
0.6000
|
0.0005085
|
7.5mm
|
7.5000
|
1.7207
|
27/32
|
21.4313
|
40.05
|
|
0.7mm
|
0.7000
|
0.0008788
|
5/16
|
7.9375
|
2.035
|
7/8
|
22.225
|
44.66
|
|
0.8mm
|
0.8000
|
0.002083
|
8mm
|
8.0000
|
2.083
|
29/32
|
23.0188
|
49.62
|
|
1mm
|
1.0000
|
0.004063
|
8.5mm
|
8.5000
|
2.505
|
15/16
|
23.8125
|
54.93
|
|
1.2mm
|
1.2000
|
0.007030
|
11/32
|
8.7313
|
2.708
|
31/32
|
24.6063
|
60.61
|
|
1.5mm
|
1.5000
|
0.01373
|
3/8
|
9.5250
|
3.516
|
25mm
|
25.000
|
63.75
|
|
1/16
|
1.5875
|
0.01628
|
10mm
|
10.000
|
4.068
|
1吋
|
25.400
|
66.67
|
|
2mm
|
2.0000
|
0.03255
|
13/32
|
10.3188
|
4.470
|
1-1/16
|
26.9875
|
79.97
|
|
3/32
|
2.3812
|
0.05439
|
7/16
|
11.1125
|
5.583
|
1-1/8
|
28.575
|
94.92
|
|
2.5mm
|
2.5000
|
0.06357
|
15/32
|
11.9063
|
6.867
|
30mm
|
30.000
|
109.8
|
|
3mm
|
3.0000
|
0.1098
|
1/2
|
12.7
|
8.334
|
1-3/16
|
30.1625
|
111.6
|
|
1/8
|
3.1750
|
0.1302
|
13mm
|
13.000
|
8.938
|
1-1/4
|
31.75
|
130.2
|
|
3.5mm
|
3.5000
|
0.1744
|
17/32
|
13.4938
|
9.996
|
1-5/16
|
33.3375
|
150.7
|
|
9/64
|
3.5719
|
0.1854
|
14mm
|
14.000
|
11.16
|
1-3/8
|
34.925
|
173.3
|
|
5/32
|
3.9688
|
0.2543
|
9/16
|
14.2875
|
11.87
|
35mm
|
35.000
|
174.4
|
|
4mm
|
4.0000
|
0.2604
|
15mm
|
15.000
|
13.73
|
1-7/16
|
36.5125
|
198.0
|
|
4.5mm
|
4.5000
|
0.3707
|
19/32
|
15.0813
|
13.95
|
1-1/2
|
38.1000
|
225.0
|
|
3/16
|
4.7625
|
0.4395
|
5/8
|
15.875
|
13.95
|
1-9/16
|
39.6875
|
254.3
|
|
5mm
|
5.0000
|
0.5085
|
16mm
|
16.000
|
16.66
|
40mm
|
40.000
|
260.4
|
|
5.5mm
|
5.5000
|
0.6786
|
21/32
|
16.6688
|
18.84
|
1-5/8
|
41.275
|
286.1
|
|
7/32
|
5.5563
|
0.6979
|
11/16
|
17.4625
|
21.66
|
1-3/4
|
44.45
|
357.3
|
|
15/64
|
5.9531
|
0.8583
|
18mm
|
18.000
|
23.73
|
45mm
|
45.000
|
370.7
|
|
6mm
|
6.0000
|
0.8788
|
23/32
|
18.2563
|
24.75
|
1-7/8
|
47.625
|
439.5
|
|
1/4
|
6.3500
|
1.042
|
3/4
|
19.0500
|
28.13
|
2吋
|
50.800
|
533.3
|
|
6.5mm
|
6.5000
|
1.1201
|
25/32
|
19.8438
|
31.79
|
2-1/4
|
57.15
|
759.4
|
|
17/64
|
6.7469
|
1.249
|
20mm
|
20.000
|
32.55
|
60mm
|
60.000
|
878.8
|
轴承钢球加工精度在10级～1000级之间。 生产规格Φ2.5mm ～Φ60mm