TONNAGE TABLE Click
to go to Press Brakes page
Click to go to Press Brake Dies page
Approximate Pressure in Tons per Linear Foot Required to
Make 90° Air Bend on Mild Steel
Width
of V-Die
Opening |
Thickness of Metal
|
26Ga
.018" |
24Ga
.024" |
22Ga
.030" |
20Ga
.036" |
18Ga
.048" |
16Ga
.060" |
14Ga
.075" |
13Ga
.090" |
12Ga
.105" |
11Ga
.120" |
10Ga
.135"
|
9 Ga
.149" |
7Ga
.187" |
1/4
.250" |
5/16
.313" |
3/8
.375" |
7/16
.437 |
1/2
.500" |
5/8
.625" |
3/4
.750" |
7/8
.875" |
1.00" |
| 1/8" |
1.2 |
2.1 |
3.6 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Need Die Opening 10X material
thickness |
| 3/16" |
0.8 |
1.4 |
4.1 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| 1/4" |
0.5 |
1.1 |
1.8 |
2.9 |
5.4 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| 5/16" |
|
0.7 |
1.4 |
2.2 |
4.0 |
7.0 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| 3/8" |
|
|
1.0 |
1.7 |
2.9 |
5.6 |
8.8 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| 1/2" |
|
|
|
1.2 |
2.2 |
3.6 |
10.0 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| 5/8" |
|
|
|
|
1.6 |
2.7 |
4.5 |
6.8 |
10.1 |
|
|
|
|
|
|
|
|
|
|
|
|
|
| 3/4" |
|
|
|
|
1.3 |
2.2 |
3.4 |
5.4 |
7.4 |
10.5 |
|
|
|
|
|
|
|
|
|
|
|
|
| 7/8" |
|
|
|
|
|
1.7 |
3.0 |
4.3 |
6.3 |
8.8 |
11.3 |
|
|
|
|
|
|
|
|
|
|
|
| 1" |
|
|
|
|
|
1.4 |
2.5 |
3.7 |
5.4 |
7.2 |
9.6 |
13.1 |
|
|
|
|
|
|
|
|
|
|
| 1 1/8" |
|
|
|
|
|
|
2.1 |
3.3 |
4.4 |
6.2 |
8.4 |
11.9 |
16.4 |
|
|
|
|
|
|
|
|
|
| 1 1/4" |
|
|
|
|
|
|
1.7 |
2.9 |
4.0 |
5.4 |
7.0 |
9.0 |
14.0 |
28.8 |
|
|
|
|
|
|
|
|
| 1 1/2" |
|
|
|
|
|
|
|
|
3.2 |
4.3 |
5.6 |
6.7 |
11.2 |
22.0 |
38.0 |
|
|
|
|
|
|
|
| 2" |
|
|
|
|
|
|
|
|
|
3.2 |
4.1 |
5.2 |
7.6 |
15.3 |
26.0 |
41.0 |
|
|
|
|
|
|
| 2 1/2" |
|
|
|
|
|
|
|
|
|
|
2.4 |
3.5 |
5.8 |
1.5 |
19.2 |
29.9 |
45.2 |
|
|
|
|
|
| 3" |
|
|
|
|
|
|
|
|
|
|
|
2.2 |
4.5 |
9.1 |
16.0 |
24.0 |
35.0 |
47.9 |
|
|
|
|
| 3 1/2" |
|
|
|
|
|
|
|
|
|
|
|
|
|
7.5 |
12.5 |
19.4 |
28.0 |
39.0 |
69.5 |
|
|
|
| 4" |
|
|
|
|
|
|
|
|
|
|
|
|
|
6.2 |
10.6 |
16.0 |
24.0 |
33.1 |
58.0 |
92.0 |
|
|
| 5" |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
7.6 |
12.3 |
17.0 |
24.0 |
42.2 |
69.0 |
104.0 |
|
| 6" |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
9.3 |
14.6 |
19.0 |
32.4 |
52.2 |
80.0 |
112.2 |
| 7" |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
11.1 |
15.6 |
26.0 |
42.2 |
63.0 |
90.2 |
| 8" |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
12.7 |
23.0 |
36.0 |
52.5 |
76.0 |
| 10" |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
16.5 |
27.0 |
39.4 |
56.2 |
| 12" |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
21.0 |
31.2 |
44.0 |
Figures in color are the pressures required using
a punch with a radius equal to the metal thickness and die
opening approximately eight times metal thickness. This combination produces
an air bend with an inside radius nearly equal to metal thickness - a good
practical minimum for 90° bends.
Click
to return to Press Brakes page
|