Sheet Metal Bend Radius Table

You may choose any bend radius on this line s.

Sheet metal bend radius table.

We want to know the final length of the detail. You will need to know your material thickness mt the bend angle b the inside radius ir and the k factor k. If you have multiple options optimize your choice. Consider what minimum bend size you require only consider lines that meet your minimum bend requirement.

It is most economical to use a single bend radius throughout the design but if necessary you can utilize multiple radii. Sheet metal bend radii. To use the tables below. If these guidelines are not followed more research and or some form of analysis may be requried.

The bend allowance formula takes into account the geometries of bending and the properties of your metal to determine the bend allowance. Preferred recommended 90 degree bend radii for various sheet metals. Refer to table s for your choice of material. Where necessary 5052 h32 may be bent to 1t and 6061 t6 to 1 1 2t.

The bending angle is 90 sheet thickness 5 mm and the inside radius is 6 mm. In fact the manufacturer s bending knives usually have a rounded corner of 0 3 and a small number of bending knives have a rounded corner of 0 5. Being able to read a bend force chart is crucial for any brake press operator and sheet metal engineer. 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.

The minimum bend radius data shown in these charts is measured to the inside of the bend. Figure 2 shows us a typical punch and die set used to bend sheet metal. Steel american iron and steel institute. Another way to determine the k factor is by following the rule of thumb.

The material thickness will be measured in decimal form not by the gauge number. This punch and die set would be mounted in a press. The gauge inside radius die opening and minimum flange length are all interconnected through different equations and relationships the air bend force. The bend radius of a sheet metal design will be based on the wall thickness of the part and the tooling that is available in house.

Use this document to choose values that are both manufacturable and meet your needs. First we must start with the k factor. Refer to the first column to choose your material thickness. Therefore the bending inner radius of our sheet metal parts is basically 0 2.

A section view of a typical punch and die set used to create sheet metal bends. The data in the above table is the preferred data and is for reference only.