Press-Brake Air-Bend Tonnage
Air-bend press-brake tonnage from thickness, bend length, V-die opening, and tensile strength: tons/ft = 575 x (UTS/60) x T^2 / V (the published mild-steel 575 constant), with the 8 x T die and minimum-flange advisories (empirical air-bend rule).
Formula and source
Air-bend tons/ft = 575 x (UTS/60) x T^2 / V; total = tons/ft x bend length. Recommended die ~8 x T; minimum flange ~0.7 x die opening.
Press-brake air-bend tonnage formula (the 575 mild-steel constant) as published in press-brake tonnage charts / Machinery's Handbook, by name; empirical method.
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