Tonnage Table for Press Brake use.
Approximate pressure in Tons per Linear Foot Required to Make 90° Air Bend on Mild Steel (without fully bottoming the top die into the bottom die)

Click for chart of tensile strengths for aluminum and stainless steel to compare with mild steel.

Highlighted Figures are the pressures required using a punch with a radius equal to the metal thickness and die opening approximately 8X metal thickness. This combination produces an air bend with an inside radius nearly equal to metal thickness-a good practical minimum for 90° bends. Buying wider Dies may increase the capacity of the Press Brake as shown on the chart. The disadvantage of using wider dies is that the minimum size flange you can bend up becomes larger and so does the inside radius.
Call 773-334-5000 if you want help from one of our sales engineers.

Click to our Chicago Dreis & Krump Press Brakes Page

Click to see our selection of Press Brake Die

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"
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

 

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