What is the minimum bend radius for sheet metal?

The minimum bend radius for sheet metal depends on several factors, including the material thickness, the type of material, and the tooling used to make the bend. As a general rule, the minimum bend radius for sheet metal should be at least equal to the material thickness.

For example, if the sheet metal is 1 mm thick, then the minimum bend radius should be 1 mm. However, certain materials may require a larger bend radius due to their physical properties. Materials that are more brittle or have a greater yield strength may require a larger bend radius to prevent cracking or deformation.

The tooling used to make the bend also plays a critical role in determining the minimum bend radius. The punch and die used to make the bend should be designed with a radius that matches the minimum bend radius of the material, ensuring that the bend is consistent and does not cause damage to the metal.

It's important to note that the minimum bend radius is not the same as the maximum bend angle. The maximum bend angle for sheet metal is generally around 180 degrees, although this can vary depending on the thickness and type of material being used. The minimum bend radius is a key consideration in sheet metal bending to ensure that the bend is precise, consistent and does not result in defects in the finished part.