What factors must be considered to determine setback in sheet metal bending?

To determine setback in sheet metal bending, the thickness of the metal and the bend radius are essential factors to consider. The setback is the distance from the edge of the sheet metal to the inside of the bend. Understanding the thickness of the metal is crucial because it directly influences how much of the material will be affected during the bending process. A thicker metal will require a different setback than a thinner one because it will not flex in the same way.

The bend radius also plays a significant role, as it dictates how tightly the metal can be bent without causing deformation or damage. A tighter bend radius will typically require a greater setback to ensure that the metal does not stretch excessively at the bend and maintains its structural integrity. Therefore, knowing both the thickness and the bend radius allows for accurate calculations of the setback, ensuring that the bends can be made correctly without compromising the quality and strength of the final product.