The leveling machine, also known as a straightening or flattening machine, is placed between the material rack (or cutting and welding machine) and the feeding machine for the leveling and feeding of coils. It is a commonly used equipment in sheet metal processing. The design of the leveling machine mainly depends on the thickness, material, and requirements of the material to be leveled. Thicker material requires higher structural rigidity, fewer rolls, larger roll diameters, and higher power, and vice versa.