Patent ID: 7214006

Claim:
A rotary cutting end mill having an axis of rotation, comprising: a shank section extending along the axis of rotation; a fluted section extending along the axis of rotation, having a first end integrally attached to the shank section, a second end, and an outer surface; and one or more helical teeth disposed along the outer surface of the fluted section, each helical tooth having a cutting surface and a relief wall that intersect to form an angle defining a helical cutting edge; wherein the cutting surface includes a first section, a second section, a first take-off peak disposed between the first section and second section, a third section, and a second take-off peak disposed between the second section and the third section; and wherein the sections and take-off peaks are operable to direct material away from the cutting surface: and wherein the cutting surface has an open orientation relative to the cutting edge and the axis of rotation such that the second section and third section are disposed on a same side of a first line extending perpendicular from a second line that is circumferentially tangential to the end mill at the cutting edge, which first line passes through the axis of rotation.