Carbon steel ball
Quality standards JB5301-1991
Scope: carbon steel ball bearings and other uses
units:μm
|
Grade
|
Number of averagedia.deviation
|
Spherical error
|
Ball diameter variation
|
lot dia. Variation
|
Surface roughness
|
|
|
Upper deviation
|
lower deviation
|
|||||
|
100
|
40
|
-40
|
2.5
|
2.5
|
5
|
0.125
|
|
200
|
60
|
-60
|
5
|
5
|
10
|
0.2
|
|
500
|
80
|
-80
|
12.5
|
12.5
|
25
|
—
|
|
1000
|
100
|
-100
|
25
|
25
|
50
|
—
|
Carbon steelballmachining precision between100G～1000G.
Production specificationsΦ1.5mm ～Φ30mm
according to customer requirements to do other non-standard specifications carbon steel ball.
Carbon steel ball diameter selection table
|
Nominal
|
Dia.
|
Nominal
|
Dia.
|
Nominal
|
Dia.
|
|
1.5mm
|
1.5000
|
17/64
|
6.7469
|
16mm
|
16.000
|
|
1/16
|
1.5875
|
9/32
|
7.1438
|
21/32
|
16.6688
|
|
2mm
|
2.0000
|
7.5mm
|
7.5000
|
11/16
|
17.4625
|
|
3/32
|
2.3812
|
5/16
|
7.9375
|
18mm
|
18.000
|
|
2.5mm
|
2.5000
|
8mm
|
8.0000
|
23/32
|
18.2563
|
|
3mm
|
3.0000
|
8.5mm
|
8.5000
|
3/4
|
19.0500
|
|
1/8
|
3.1750
|
11/32
|
8.7313
|
25/32
|
19.8438
|
|
3.5mm
|
3.5000
|
3/8
|
9.5250
|
20mm
|
20.000
|
|
9/64
|
3.5719
|
10mm
|
10.000
|
13/16
|
20.6375
|
|
5/32
|
3.9688
|
13/32
|
10.3188
|
27/32
|
21.4313
|
|
4mm
|
4.0000
|
7/16
|
11.1125
|
7/8
|
22.225
|
|
4.5mm
|
4.5000
|
15/32
|
11.9063
|
29/32
|
23.0188
|
|
3/16
|
4.7625
|
1/2
|
12.7
|
15/16
|
23.8125
|
|
5mm
|
5.0000
|
13mm
|
13.000
|
31/32
|
24.6063
|
|
5.5mm
|
5.5000
|
17/32
|
13.4938
|
25mm
|
25.000
|
|
7/32
|
5.5563
|
14mm
|
14.000
|
1''
|
25.400
|
|
15/64
|
5.9531
|
9/16
|
14.2875
|
1-1/16
|
26.9875
|
|
6mm
|
6.0000
|
15mm
|
15.000
|
1-1/8
|
28.575
|
|
1/4
|
6.3500
|
19/32
|
15.0813
|
30mm
|
30.000
|
|
6.5mm
|
6.5000
|
5/8
|
15.875
|
1-3/16
|
30.1625
|