Sheet Metal Bending Radius Chart

The minimum bend radius data shown in these charts is measured to the inside of the bend.

Sheet metal bending radius chart.

Since commercial sheet metal bending can be done with less concern for stresses caused during forming operation the radius can be near zero for thin sheet metal. An air bend force chart or force chart breaks down a number of key components of sheet metal bending in an easy to reference format. The material thickness will be measured in decimal form not by the gauge number. The bend radii listed are standard minimum if manufacturing for aircraft and aerospace applications.

Bend radii minimum bend sizes. We go beyond the general rules of sheet metal bending as our customers want tight bend radii for sheet metal parts. The tables below show bend radii and minimum bend sizes for materials and tooling combinations stocked by protocase. It is most economical to use a single bend radius throughout the design but if necessary you can utilize multiple radii.

Let s say i have a 2 mm thick sheet and i want to bend it. It is possible to choose other bends if you require but additional lead time and tooling charges may apply. Being able to read a bend force chart is crucial for any brake press operator and sheet metal engineer. To keep it simple i also use a 2 mm inside radius.

The bend allowance formula takes into account the geometries of bending and the properties of your metal to determine the bend allowance. The gauge inside radius die opening and minimum flange length are all interconnected through different equations and relationships the air bend force.