Patent ID: 6991409

Claim:
A rotary cutting tool, comprising: an elongated tool body having a center and rotatable along a longitudinal axis of rotation passing through said center of the tool body; a fluted cutting end and a shank end formed integrally opposite to said fluted cutting end, said fluted cutting end having a nose, a periphery and an end surface extending from said nose to said periphery, said shank end having a shank extending along said longitudinal axis of rotation; and a plurality of flutes, extending generally along said end surface in an axial direction of the tool body and located unsymmetrically with each other around said longitudinal axis of rotation so as to be spaced apart from each other, each said flute having an integral adjacent radial cutting edge running alongside said flute for engaging and cutting a workpiece, each said radial cutting edge being helically curved and having a radial cutting edge geometry whereby each said radial cutting edge lies on the surface of a circumscribing cylinder defined by the rotation of said radial cutting edges about said longitudinal axis of rotation of the tool body and each said radial cutting edge has a circumferencial index; and each said radial cutting edge having a helix, a radial rake, and a radial relief.