Tonnage Chart

Rule of Thumb formula for making multiple bends on a press brake.  For shape shown, in mild steel with radii equal to metal thickness unless otherwise noted.


Shape Description Airform Bottoming
vee_die Vee Die 60 150
shapes_wiping Wiping 250
shapes_offset Offset 150 300/600
shapes_mtl_thk MTL.THK Offset 300 600
shapes_channel Channel 225 300
shapes_vee_rib Vee Rib 200 600
shapes_w_die W Die 300 600
shapes_open_hat Open Hat Channel 300 450
shapes_sq_hat Sq. Hat Channel 600
shapes_curl_1 Perform Curl 300
shapes_curl_2 Perform Curl 200
shapes_curl_3 Close Curl 300
shapes_radius Radius 180/300
Shape Considerations Large Radi
Angle Variation
Concave or
Convex Slides
Material Thk. Radi
Min. Angle


Multiply Metal Thickness by factor = Tons per Foot

Material Modifiers
Stainless Steel x 1.55
3303-H14 (1/2 hard) x 0.35
5052-H34 (1/2 hard) x 0.65
6061-T6 x 0.75

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