What distance is the sight line from the bend tangent line in a cornice brake?

The sight line from the bend tangent line in a cornice brake is the bend radius length. This distance is critical because it defines how the material will deform when a bend is made. When fabricating sheet metal, the bend radius is the radius of the arc of the bend at the point where the metal begins to curve from the flat condition into the bend.

Understanding the bend radius is essential for achieving the desired geometry in the finished part and ensuring that the material does not exceed its elastic limit, leading to cracking or other issues. This measurement directly influences the angle and resulting dimensions of the bend, making it a fundamental concept in sheet metalworking and design. A thorough grasp of the bend radius helps ensure quality and accuracy in the formed parts.