Abstract: An rotary cutting tool is presented that has a shank region, a cutting region terminating in a cutting tip, at least one a flute formed within the cutting region beginning at the cutting tip and terminating at a distal location towards the shank region, and a cutting edge formed along an outer border of each flute. Each flute starts with a first helical-pitch proximate the cutting tip and changes to a second helical-pitch proximate the terminating distal location. When the rotary cutting tool has multiple paired flutes each set of paired flutes may be off-set from the next at other than a perpendicular alignment.

Abstract: An improved end mill and method of producing are presented wherein the end mill has a neck with a neck diameter, a cutting end with a cutting end diameter, a flute formed within the cutting end, and a cutting edge formed along an outer border of the flute an the improvement includes a highly or mirror polished cutting edge land extending from and along the cutting edge. Additionally, included are a primary angle land continuing from the mirror polished cutting edge land and extending into the flute, a secondary angle land adjoining the primary angle land and terminating within the flute, and, if desired, a smoothed transition region between the cutting end diameter and the neck diameter.