Muzerdo Cutting Diameter Magnetic Standard Cutting Tools Review

An annular cutter (also called as core drill, core cutter, broach cutter, trepanning drill, hole saw, or cup-type cutter) is form of core drill used to create holes in metal. An annular cutter cuts only a groove at the periphery of the hole and leaves a solid core or slug at the center. WIDELY USED: Annular cutters are best used with a drill press or magnetic drilling machine, both for their stability against high torque forces created by such a drill bit and lower RPMs compared to other types of drills. HIGH-SPEED STEEL: An annular cutter is a more expensive and more efficient alternative to spiral drill bits and standard hole saws. An annular cutter is similar to a hole saw but differs in geometry and material. Our cutter are made of tough high speed steel material, with longer service life and high heat resistance. WELDON SHANK: "Weldon shank" annular cutters have 2 flats and this is the traditional method adopted by many of the popular magnetic drill manufacturers. "Weldon shank" annular cutters fix in the chuck by tightening grub screws in the two flat areas. RE-SHARPENING: Once the HSS cutter loses its sharpness, it can be re-ground on a grinding machine and can be used again.