Patent attributes
In one aspect, rotary cutting tools are described herein comprising sets of coolant channels having exit aperture in the flutes of the tools for efficient coolant delivery to multiple cutting surfaces. Briefly, a rotary cutting tool comprises a shank portion, and a cutting portion extending from the shank portion along a longitudinal axis, the cutting portion comprising flutes helically extending along the longitudinal axis and internal coolant channels comprising exit apertures in the flutes. A projection of an exit aperture of a first set of internal coolant channels intersects a rake face extending below a corner edge of the rotary cutting tool, and a projection of an exit aperture of a second set of internal coolant channels intersects a rake face below a radial cutting edge of the rotary cutting tool.
