NEW GEKA USA Punching Capacities Calculator


Perimeter(p) x Thickness x Tensile/2000 = US Tons

Please refer to the below drawing for more information about how to calculate the perimeter (p) of the most common shapes.


CAUTION: Never punch a diameter
smaller than the material thickness

Please select a shape and introduce measures:

Fill in two of the three first fields and get the result for the missing field.
Resistance is a compulsory field.
Example: for a given diameter, thickness and strength*, work out the tonnage.

Usual material strengths


Material NameMinimum TensileMaximum Tensile
1018 64000
304 73200
304 73200
316 84100
316L 81200
6061 T6 Aluminum 45000
Copper 35000
Nevertheless, it is very important to apply
the correct gap between punch and die:
1/8″ to 1/2″

1/2″ to 3/4″

Mild steel (ST37 to 42)10 %
3/4″ to 1″

1″ & +1/8″

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