PUNCH TONNAGE CHART

Tonnage requirement for other than mild steel

(50,000 Pound Shear Strength)

TONNAGE REQUIRED TO PUNCH ROUND HOLES IN MILD STEEL

Round Hole Diameter
METAL THICKNESS
1/8"
1/4"
3/8"
1/2"
5/8"
3/4"
7/8"
1"
1-1/8"
1-1/4"
1-3/8"
1-1/2"
1-5/8"
1-3/4"
1/8"
1
-
-
-
-
-
-
-
-
-
-
-
-
-
1/4"
3
5
-
-
-
-
-
-
-
-
-
-
-
-
3/8"
4
8
11
-
-
-
-
-
-
-
-
-
-
-
1/2"
5
10
15
20
25
-
-
-
-
-
-
-
-
-
5/8"
6
13
19
25
31
38
-
-
-
-
-
-
-
-
3/4"
8
15
23
30
38
45
53
-
-
-
-
-
-
-
7/8"
9
18
26
35
44
53
61
70
79
-
-
-
-
-
1"
10
20
30
40
50
60
70
80
90
100
-
-
-
-
1-1/8"
11
23
33
45
56
68
78
90
101
112
123
-
-
-
1-1/4"
13
25
38
50
63
75
88
100
113
126
138
150
-
-
1-3/8"
14
28
41
55
69
83
96
110
124
138
152
165
179
-
1-1/2"
15
30
45
60
75
90
105
120
135
150
165
180
195
210
1-5/8"
16
33
49
65
81
98
114
130
147
163
179
195
211
227
1-3/4"
18
35
52
70
87
105
122
140
158
175
193
210
229
245
2"
20
40
60
70
100
120
140
160
180
200
220
240
260
280
2-1/4"
23
45
67
90
112
135
157
180
203
225
248
270
293
315
2-1/2"
25
50
75
100
125
150
175
200
225
250
275
300
325
350
2-3/4"
28
55
82
110
132
165
187
220
248
275
303
330
358
385
3"
30
60
90
120
150
180
210
240
270
300
330
360
390
410
3-1/4"
33
65
97
130
162
195
227
260
293
325
358
390
423
455
3-1/2"
35
70
105
140
180
210
245
280
315
350
385
420
455
490
3-3/4"
38
75
112
150
187
225
262
300
338
375
413
450
488
525
4"
40
80
120
160
200
240
280
320
360
400
440
480
520
560
METAL TYPE
MULTIPLIER
Aluminum (2024-0)
.36
Brass (1/4 Hard)
.70
Copper (1/2 Hard)
.52
Steel (50% Carbon)
1.60
Steel Cold Drawn (1018)
1.24
Stainless Steel (303)
1.50

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

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