What is the sharp edge left on a sheet after shearing called?

The sharp edge left on a sheet after shearing is known as a burr. This occurs during the cutting process when the blade passes through the material, causing the metal fibers on the edge to distort and create a rough, sharp ridge. Burrs can vary in size and severity depending on the material and the cutting method used.

Understanding the presence of burrs is important in sheet metal work because they can affect both the safety and functionality of the finished product. Burrs can pose a risk for cuts or injuries during handling, and they may also interfere with the fitting or assembly of pieces. Therefore, it is often necessary to remove these burrs through processes such as deburring or sanding to achieve a smooth and safe edge.