Standard Bending Radius For Sheet Metal

Bending is one of the most common sheet metal fabrication operations.

Standard bending radius for sheet metal.

The force must exceed the material s yield strength to achieve a plastic deformation. 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. Sheet metal bend radii if these guidelines are not followed more research and or some form of analysis may be requried. The minimum bend radius data shown in these charts is measured to the inside of the bend.

The bend radii listed are standard minimum if manufacturing for aircraft and aerospace applications. The material thickness will be measured in decimal form not by the gauge number. Recommended minimum bend radii for steel and aluminum. Usually the preferred distance between holes and a bend is 1 5 times the sheet thickness plus the bend radius 1 5t h.

Sheet metal bend brakes are used to bend material into the parts desired geometry. Specifing a bend radius from here will help prevent hair line cracks. Recommended inside bend radius for sheet metal parts should be equal to material thickness. Material thickness or 0 1575 in.

Bend radii minimum bend sizes. Regardless of what s called on the print this setup will produce an inside bend radius in the part much greater than that of the punch nose. The bend allowance formula takes into account the geometries of bending and the properties of your metal to determine the bend allowance. It is possible to choose other bends if you require but additional lead time and tooling charges may apply.

Also known as press braking flanging die bending folding and edging this method is used to deform a material to an angular shape. You will need to know your material thickness mt the bend angle b the inside radius ir and the k factor k. Keeping the bend radius consistent will also make parts more cost effective. Supplying 3d models without considering these factors increases the chance.

In this case the minimum producible inside bend radius is 63 percent of that 0 250 in. Use this document to choose values that are both manufacturable and meet your needs. Crca inside bend radius equal to 0 65 times of sheet thickness is also enough. It is most economical to use a single bend radius throughout the design but if necessary you can utilize multiple radii.

The tables below show bend radii and minimum bend sizes for materials and tooling combinations stocked by protocase. But for harder materials e g. Table 1 preferred recommended 90 degree bend radii for various sheet metals. We go beyond the general rules of sheet metal bending as our customers want tight bend radii for sheet metal parts.