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Punching Tonnage Chart
MATERIAL THICKNESS IN MILD STEEL
HOLE |
1/8" |
1/4" |
3/8" |
1/2" |
5/8" |
3/4" |
7/8" |
1" |
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 |
1" |
10 |
20 |
30 |
40 |
50 |
60 |
70 |
80 |
1-1/8" |
11 |
23 |
33 |
45 |
56 |
68 |
78 |
90 |
1-1/4" |
13 |
25 |
38 |
50 |
63 |
75 |
88 |
100 |
1-3/8" |
14 |
28 |
41 |
55 |
69 |
83 |
96 |
110 |
1-1/2" |
15 |
30 |
45 |
60 |
75 |
90 |
105 |
120 |
1-5/8" |
16 |
33 |
49 |
65 |
81 |
98 |
114 |
130 |
1-3/4" |
18 |
35 |
52 |
70 |
87 |
105 |
122 |
140 |
2" |
20 |
40 |
60 |
80 |
100 |
120 |
140 |
160 |
2-1/4" |
23 |
45 |
67 |
90 |
112 |
135 |
157 |
180 |
2-1/2" |
25 |
50 |
75 |
100 |
125 |
150 |
175 |
200 |
2-3/4" |
28 |
55 |
82 |
110 |
132 |
165 |
187 |
220 |
3" |
30 |
60 |
90 |
120 |
150 |
180 |
210 |
240 |
3-1/4" |
33 |
65 |
97 |
130 |
162 |
195 |
227 |
260 |
3-1/2" |
35 |
70 |
105 |
140 |
180 |
210 |
245 |
280 |
3-3/4" |
38 |
75 |
112 |
150 |
187 |
225 |
262 |
300 |
4" |
40 |
80 |
120 |
160 |
200 |
240 |
280 |
320 |
4-1/2" |
45 |
90 |
135 |
180 |
225 |
270 |
315 |
360 |
5" |
50 |
100 |
150 |
200 |
250 |
300 |
350 |
400 |
5-1/2" |
55 |
110 |
165 |
220 |
275 |
330 |
385 |
440 |
6" |
60 |
120 |
180 |
240 |
300 |
360 |
420 |
480 |
TONNAGE BASED ON MILD STEEL 60,000 TENSILE
A36 CAN BE HIGHER
STAINLESS STEEL TONNAGE IS 50% HIGHER
MATERIAL THICKNESS SHOULD NOT EXCEED PUNCH DIAMETER IN MECHANICAL
MACHINES
MATERIAL THICKNESS SHOULD NOT EXCEED 1.23 TIMES PUNCH DIAMETER IN
HYDRAULIC MACHINES
MINIMUM PUNCH AND DIE CLEARANCE SHOULD BE 10% OF THE MATERIAL
THICKNESS
SHEAR ADDED TO PUNCH CAN REDUCE TONNAGE REQUIRED