Press Brake Forming Force Chart
for Multiple Bend Shapes
Multiply Metal Thickness by the value
given to obtain an estimate of the Tons per Linear Foot
required to bend the given shape in mild steel with a Tensile Strength of 60,000 psi.
(Bend radii are equal to the metal thickness unless otherwise indicated.)
| Shape | Description | AirForm | Bottoming |
| Vee Die | 60 | 150 | |
| Wiping | ---- | 250 | |
| Offset | 150 | 300/600 | |
| Mt'l. Thk. Offset |
300 | 600 | |
| Channel | 225 | 300 | |
| Vee Die | 200 | 600 | |
| W Die | 300 | 600 | |
| Open Hat Channel |
300 | 450 | |
| Sq. Hat Channel |
---- | 600 | |
| Preform Curl |
---- | 300 | |
| Preform Curl |
---- | 200 | |
| Close Curl | ---- | 300 | |
| Radius | ---- | 180/300 | |
| Forming
Considerations AirForm vs. Bottoming |
Large Radii, Angle Variation, Concave or Convex Sides |
Mat'l Thk
Radii, Min Angle Variation, Maintain Flatness |
|
Note: Bending forces required for other metals
can be estimated using the chart above and
multiplying the estimated force by the
appropriate adjustment shown in the table below...
| Material | Multiplier |
| Stainless Steel...18-8 Annealed Type 304 | 1.55 |
| Aluminum...3303-H14 (½ Hard) | .35 |
| Aluminum...5052-H34 (½ Hard) | .65 |
| Aluminum...6061-T64 | .75 |
| Brass...(Soft) | .50 |
| Brass...70/30 (½ Hard) | 1.10 |
| Chrome Molybdenum | 2.00 |