Coil Slitting - This is also a shearing process, but rather than making cuts at the end of a workpiece like shearing, slitting is used to cut a wide coil of metal into a number of narrower coils as the main coil is moved through the slitter. During the slitting process, the metal coil passes lengthwise through the slitter's circular blades. The slitting process characteristics include: being restricted to cutting relatively thin materials (0.001 to 0.125 in.), leaving left-over burrs on slit edges of the narrower coils, its ability to be used on both ferrous and nonferrous metals, its categorization as a high production designed to control metal coil width.