Sheet Metal Bend Radius Table

It is most economical to use a single bend radius throughout the design but if necessary you can utilize multiple radii.

Sheet metal bend radius table.

Bend radii minimum bend sizes. Figure 2 shows us a typical punch and die set used to bend sheet metal. Consider what minimum bend size you require only consider lines that meet your minimum bend requirement. We want to know the final length of the detail.

Steel american iron and steel institute. The bend radii listed are standard minimum if manufacturing for aircraft and aerospace applications. This punch and die set would be mounted in a press. The minimum bend radius data shown in these charts is measured to the inside of the bend.

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. A section view of a typical punch and die set used to create sheet metal bends. Therefore the bending inner radius of our sheet metal parts is basically 0 2. The material thickness will be measured in decimal form not by the gauge number.

Being able to read a bend force chart is crucial for any brake press operator and sheet metal engineer. Where necessary 5052 h32 may be bent to 1t and 6061 t6 to 1 1 2t. Preferred recommended 90 degree bend radii for various sheet metals. 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.

Refer to table s for your choice of material. First we must start with the k factor. The data in the above table is the preferred data and is for reference only. You may choose any bend radius on this line s.

Use this document to choose values that are both manufacturable and meet your needs. Refer to the first column to choose your material thickness. You will need to know your material thickness mt the bend angle b the inside radius ir and the k factor k. The bend allowance formula takes into account the geometries of bending and the properties of your metal to determine the bend allowance.

To use the tables below. Sheet metal bend radii. 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. The bending angle is 90 sheet thickness 5 mm and the inside radius is 6 mm.

If you have multiple options optimize your choice. If these guidelines are not followed more research and or some form of analysis may be requried.