Disclaimer: Actual drawing force hydraulic press calculations are affected by many factors such as friction between the material and the die, material thickness, material strength variations, rolling direction of the steel, work hardening, die lubrication, speed of draw, cushion pressure required and other parameters. This estimate calculates a preliminary value to be used for initial machine sizing. The die maker can provide a more accurate estimate of tonnage required.

The calculators below provide “rough estimates” of draw form. Most parts are neither simple circular nor rectangular parts. There are a number of more detailed methods of determining draw force for more complicated parts.