| Tons required per hole to punch mild steel having max.60,000
PSI tensile strength and max.36,000 PSI yield strength. |
|
Metal
Thickness
|
Hole
Diameter
|
| Gauge |
Inches |
1/8" |
3/16" |
1/4" |
5/16" |
3/8" |
7/16" |
1/2" |
7/16" |
|
28
|
0.015
|
0.2
|
0.2
|
0.3
|
0.4
|
0.4
|
0.5
|
0.6
|
0.7
|
|
26
|
0.018
|
0.2
|
0.3
|
0.4
|
0.4
|
0.5
|
0.6
|
0.7
|
0.8
|
|
24
|
0.024
|
0.2
|
0.4
|
0.5
|
0.6
|
0.7
|
0.8
|
0.9
|
1.1
|
|
22
|
0.030
|
0.3
|
0.4
|
0.6
|
0.7
|
0.9
|
1.0
|
1.2
|
1.3
|
|
20
|
0.036
|
0.4
|
0.5
|
0.7
|
0.9
|
1.1
|
1.2
|
1.4
|
1.6
|
|
18
|
0.048
|
0.5
|
0.7
|
0.9
|
1.2
|
1.4
|
1.6
|
1.9
|
2.1
|
|
16
|
0.060
|
0.6
|
0.9
|
1.2
|
1.5
|
1.8
|
2.1
|
2.3
|
2.6
|
|
14
|
0.075
|
0.7
|
1.1
|
1.5
|
1.8
|
2.2
|
2.6
|
2.9
|
3.3
|
|
12
|
0.105
|
1.0
|
1.5
|
2.1
|
2.6
|
3.1
|
3.6
|
4.1
|
4.6
|
|
11
|
0.120
|
1.2
|
1.8
|
2.4
|
2.9
|
3.5
|
4.1
|
4.7
|
5.1
|
|
10
|
0.135
|
1.3
|
2.0
|
2.6
|
3.3
|
4.0
|
4.6
|
5.3
|
5.9
|
|
5/32"
|
0.157
|
- |
2.3
|
3.1
|
3.8
|
4.6
|
5.4
|
6.1
|
6.9
|
|
3/16"
|
0.188
|
- |
2.8
|
3.7
|
4.6
|
5.5
|
6.4
|
7.4
|
8.3
|
|
1/4"
|
0.250
|
- |
- |
4.9
|
6.1
|
7.4
|
8.6
|
9.8
|
11.1
|
|
3/8"
|
0.375
|
- |
- |
- |
- |
11.1
|
12.8
|
14.8
|
16.5
|
|
1/2"
|
0.500
|
- |
- |
- |
- |
- |
- |
19.7
|
22.0
|
|
5/8"
|
0.625
|
- |
- |
- |
- |
- |
- |
- |
- |
|
3/4"
|
0.750
|
- |
- |
- |
- |
- |
- |
- |
- |
|
1"
|
1.000
|
- |
- |
- |
- |
- |
- |
- |
- |
|
|
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|
|
Metal
Thickness
|
Hole
Diameter
|
| Gauge |
Inches |
5/8" |
11/16" |
3/4" |
13/16" |
7/8" |
15/16" |
1" |
|
28
|
0.015
|
0.7
|
0.8
|
0.9
|
1.0
|
1.1
|
1.2
|
1.3
|
|
26
|
0.018
|
0.9
|
1.0
|
1.1
|
1.1
|
1.2
|
1.3
|
1.4
|
|
24
|
0.024
|
1.2
|
1.3
|
1.4
|
1.5
|
1.6
|
1.8
|
1.9
|
|
22
|
0.030
|
1.5
|
1.6
|
1.8
|
1.9
|
2.1
|
2.2
|
2.4
|
|
20
|
0.036
|
1.8
|
1.9
|
2.1
|
2.3
|
2.5
|
2.6
|
2.8
|
|
18
|
0.048
|
2.4
|
2.6
|
2.8
|
3.1
|
3.3
|
3.5
|
3.8
|
|
16
|
0.060
|
2.9
|
3.2
|
3.5
|
3.8
|
4.1
|
4.4
|
4.7
|
|
14
|
0.075
|
3.7
|
4.0
|
4.4
|
4.8
|
5.1
|
5.5
|
5.9
|
|
12
|
0.105
|
5.1
|
5.7
|
6.2
|
6.7
|
7.2
|
7.7
|
8.2
|
|
11
|
0.120
|
5.9
|
6.2
|
7.1
|
7.6
|
8.3
|
8.8
|
9.4
|
|
10
|
0.135
|
6.6
|
7.3
|
7.9
|
8.6
|
9.2
|
9.9
|
10.6
|
|
5/32"
|
0.157
|
7.7
|
8.4
|
9.2
|
10.0
|
10.7
|
11.5
|
12.3
|
|
3/16"
|
0.188
|
9.2
|
10.1
|
11.0
|
12.0
|
12.9
|
13.8
|
14.8
|
|
1/4"
|
0.250
|
12.3
|
13.5
|
14.7
|
16.0
|
17.2
|
18.4
|
19.7
|
|
3/8"
|
0.375
|
18.5
|
20.2
|
22.1
|
23.8
|
25.8
|
27.5
|
29.5
|
|
1/2"
|
0.500
|
24.6
|
26.9
|
29.5
|
31.8
|
34.4
|
36.8
|
39.4
|
|
5/8"
|
0.625
|
30.8
|
33.7
|
36.9
|
39.9
|
43.0
|
46.0
|
49.2
|
|
3/4"
|
0.750
|
- |
- |
44.3
|
47.7
|
51.7
|
55.2
|
59.0
|
|
1"
|
1.000
|
- |
- |
- |
- |
- |
- |
60.0
|
|
| For smooth trouble-free operation, the punching tonnage
should not exceed two-thirds of the rated capacity of the press. In multiple
punching set-ups, the punches should be stepped by setting punches at different
levels. If the punches are on two levels, the punching tonnage required
may be divided by two. If they are set on three levels, the tonnages may
be divided by three. |
|
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|
