Sheet Metal Bending Radius Chart

The material thickness will be measured in decimal form not by the gauge number.

Sheet metal bending radius chart.

Use this document to choose values that are both manufacturable and meet your needs. Being able to read a bend force chart is crucial for any brake press operator and sheet metal engineer. The gauge inside radius die opening and minimum flange length are all interconnected through different equations and relationships the air bend force. It is possible to choose other bends if you require but additional lead time and tooling charges may apply.

To keep it simple i also use a 2 mm inside radius. The tables below show bend radii and minimum bend sizes for materials and tooling combinations stocked by protocase. 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 bend radii listed are standard minimum if manufacturing for aircraft and aerospace applications. The minimum bend radius data shown in these charts is measured to the inside of the bend. The bend allowance formula takes into account the geometries of bending and the properties of your metal to determine the bend allowance. We go beyond the general rules of sheet metal bending as our customers want tight bend radii for sheet metal parts.

You will need to know your material thickness mt the bend angle b the inside radius ir and the k factor k. I can now see that the minimum flange length is 8 5 mm for such a bend so i have to keep it in mind when designing.