Sheet Metal Bend Radius Table

If you have multiple options optimize your choice.

Sheet metal bend radius table.

The data in the above table is the preferred data and is for reference only. Another way to determine the k factor is by following the rule of thumb. Sheet metal bend radii. Consider what minimum bend size you require only consider lines that meet your minimum bend requirement.

Preferred recommended 90 degree bend radii for various sheet metals. 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. Where necessary 5052 h32 may be bent to 1t and 6061 t6 to 1 1 2t.

Refer to the first column to choose your material thickness. If these guidelines are not followed more research and or some form of analysis may be requried. This punch and die set would be mounted in a press. The bend allowance formula takes into account the geometries of bending and the properties of your metal to determine the bend allowance.

Therefore the bending inner radius of our sheet metal parts is basically 0 2. You will need to know your material thickness mt the bend angle b the inside radius ir and the k factor k. A section view of a typical punch and die set used to create sheet metal bends. The bending angle is 90 sheet thickness 5 mm and the inside radius is 6 mm.

The minimum bend radius data shown in these charts is measured to the inside of the bend. Bend radii minimum bend sizes. You may choose any bend radius on this line s. Steel american iron and steel institute.

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. First we must start with the k factor. The gauge inside radius die opening and minimum flange length are all interconnected through different equations and relationships the air bend force. Refer to table s for your choice of material.

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

Figure 2 shows us a typical punch and die set used to bend sheet metal. We want to know the final length of the detail.