Bend Radius Sheet Metal Thickness

Generally speaking the thicker a piece of sheet metal is the wider the internal bend radius will have to be.

Bend radius sheet metal thickness.

Use this document to choose values that are both manufacturable and meet your needs. The bend radius refers to the inside radius. First we must start with the k factor. Similarly the harder a piece of metal is the more room you ll have to allocate for the bend as well or risk fracturing the sheet metal.

For this material this is the minimum producible inside radius with air forming. It is most economical to use a single bend radius throughout the design but if necessary you can utilize multiple radii. The hardness of the metal. You will need to know your material thickness mt the bend angle b the inside radius ir and the k factor k.

The formed bend radius is dependent upon the dies used the material properties and the material thickness. The material thickness will be measured in decimal form not by the gauge number. When sheet metal is bent it stretches in length. The minimum bend radius data shown in these charts is measured to the inside of the bend.

The bend deduction is the amount the sheet metal will stretch when bent as measured from the outside edges of the bend. The bending angle is 90 sheet thickness 5 mm and the inside radius is 6 mm. Crca inside bend radius equal to 0 65 times of sheet thickness is also enough. The bend radii listed are standard minimum if manufacturing for aircraft and aerospace applications.

The tables below show bend radii and minimum bend sizes for materials and tooling combinations stocked by protocase. We go beyond the general rules of sheet metal bending as our customers want tight bend radii for sheet metal parts. It is possible to choose other bends if you require but additional lead time and tooling charges may apply. We want to know the final length of the detail.

Recommended inside bend radius for sheet metal parts should be equal to material thickness. If you are working with a material thickness of 0 100 in multiply that by 0 63 to get a minimum inside bend radius of 0 063 in. But for harder materials e g. The bend allowance formula takes into account the geometries of bending and the properties of your metal to determine the bend allowance.

Bend radii minimum bend sizes.