Top slitter blade sharpening
The process used to grind blades heavily influences blade life and cut quality. In most grinding applications, a tub-type plunge grinder is used to remove stock from the dull blade. When the blade is ground to the correct diameter, a substantial burr still remains and the grinder operator hand hones the burr off the edge of the blade. Because the grinder operator must chase the burr from side to side around the circumference of the blade to remove it, frequently the tip is rounded off before the blade is even run on the machine.
The tip of a hand-honed slitter blade. (.001 radius at the tip; 400x magnification.)
Slitter Management uses the superfinishing process for sharpening slitter blades and bands. Superfinishing produces the cleanest, sharpest cutting edge possible. First, worn stock is removed with a traverse-type grinder for a better finish. The blade then goes to the superfinishing sharpening where the burr is mechanically removed and the edge is polished. This process results in a highly polished cutting surface with a razor-sharp blade edge.
The tip of a SUPERFINISHED slitter blade. (.0001 radius at the tip; 400x magnification.)