One of the most important parts of the press brake process is choosing the right tools. But what are the best tools for the job? And how do you best assess tool capability, such as the kind of loads they can withstand? With the following advice, we’ll go over how to make sure the tools of your choice can manage the tonnage required.

press tool

Straight Punch Tonnage


Estimating the maximum allowable tonnage for a given tool depends on material type, tool hardness and tool geometry. A standard straight press brake punch will endure far more tonnage for every meter than what the press brake itself can withstand. As a rule of thumb regarding how much a press brake tool can withstand, never apply full machine tonnage over a length less than 60 percent of the distance between side frames.


Gooseneck Punch and V-die Tonnage


There are variations when it comes to gooseneck punch tools, but standard throat depths begin at about 20 percent of total tool width past the centre, leaving about 30 percent of the tool to take the tonnage at the bend. With any increase in throat depth, there is decreased tool capacity for tonnage. As for V-die tools, the maximum tonnage is 30 tons per foot, with consideration to the maximum load.


When in doubt, make sure to use the above advice as a guideline for the estimating the tonnage capabilities of press brake tooling equipment. For personal safety, and to ensure longevity of the tool, ask the manufacturer to explain the deflection factor for the tooling length and tonnage application of the particular equipment, and substitute the specified values in the formula.


ACRA Machinery have a full team on site, offering services for maintenance, machinery repair and servicing requirements. ACRA’s press brake tooling is built upon the values of precision and efficiency, and they’re sure to offer you the best tools for what you need. Get in touch today by calling 03 9794 6675.