The bend allowance formula takes into account the geometries of bending and the properties of your metal to determine the bend allowance.
Aluminum sheet metal bend radius chart.
Radii for various thicknesses expressed in terms of thickness t.
The tables below show bend radii and minimum bend sizes for materials and tooling combinations stocked by protocase.
Sheet metal bend radii if these guidelines are not followed more research and or some form of analysis may be requried.
We go beyond the general rules of sheet metal bending as our customers want tight bend radii for sheet metal parts.
Per the aluminum association inc.
The bend radii listed are standard minimum if manufacturing for aircraft and aerospace applications.
It is possible to choose other bends if you require but additional lead time and tooling charges may apply.
Use the minimum bend dimension values in the charts below for your minimum closeness of cutout to a bend.
Aluminum minimum bend radii for 90 degree cold forming of sheet and plate.
The minimum bend radius data shown in these charts is measured to the inside of the bend.
You will need to know your material thickness mt the bend angle b the inside radius ir and the k factor k.
Table 1 preferred recommended 90 degree bend radii for various sheet metals.
The material thickness will be measured in decimal form not by the gauge number.