1 8 Sheet Metal Bend Radius

The bend allowance formula takes into account the geometries of bending and the properties of your metal to determine the bend allowance.

1 8 sheet metal bend radius.

If you re bending 0 020 thick material use a 0 020 radius. As this happens you gain a small amount of total length in your part. You will need to know your material thickness mt the bend angle b the inside radius ir and the k factor k. Thick grade 350 and 400 may have a minimum bend radius of 2 5 times the material thickness when transverse bending while longitudinal bending may require a minimum bend radius that s 3 75 times the material thickness see figure 1.

Thickness minimum bend bend radius. Alternatively you can design with any value and we can adjust it for you later in the process. Radii for various thicknesses expressed in terms of thickness t. Or 1 866 849 3911 and we can help.

20 gauge 0 040 1 01 mm. In other words if you re bending 1 8 sheet use a tool with a 1 8 radius to form the inside of the bend. The inside bend radius should be equal to the thickness of the material that you re forming. The material thickness will be measured in decimal form not by the gauge number.

Aluminum minimum bend radii for 90 degree cold forming of sheet and plate. Per the aluminum association inc. Let s say i have a 2 mm thick sheet and i want to bend it. The tables below show bend radii and minimum bend sizes for materials and tooling combinations stocked by protocase.

Here s a good rule of thumb for most materials. 20 gauge 0 040 1 01 mm 0 2 5 08mm. The bend radii listed are standard minimum if manufacturing for aircraft and aerospace applications. 0 060 crs 2 000 2 000 r0 031 aluminum 90 deg.

To keep it simple i also use a 2 mm inside radius. When the sheet metal is put through the process of bending the metal around the bend is deformed and stretched. 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. 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.

Understanding the bend allowance and consequently the bend deduction of a part is a crucial first step to understanding how sheet metal parts are fabricated. In steel between 0 5 and 0 8 in.