Rotary cutting tool with reverse chipbreaker pattern

A rotary cutting tool with a longitudinal axis, comprising:

• a shank portion;
• a cutting portion extending from the shank portion to a cutting tip, the cutting portion having a plurality of blades separated by flutes, each of the blades including a leading face, a trailing face, and a land surface extending between the leading face and the trailing face, and a cutting edge at the intersection between the leading face and the land surface;
• and
• a plurality of chipbreakers disposed on each blade in a reverse chipbreaker pattern, wherein each chipbreaker on a preceding blade is farther from the shank portion than a corresponding chipbreaker on an immediately adjacent following blade for a particular direction of rotation of the rotary cutting tool.

A rotary cutting tool with a longitudinal axis, comprising:

• a shank portion;
• a cutting portion extending from the shank portion to a cutting tip, the cutting portion having a plurality of blades separated by flutes, each of the blades including a leading face, a trailing face, and a land surface extending between the leading face and the trailing face, and a cutting edge at the intersection between the leading face and the land surface;
• and
• a plurality of chipbreakers disposed on each blade in a reverse chipbreaker pattern, wherein each chipbreaker on a preceding blade is closer to the cutting tip than a corresponding chipbreaker on an immediately adjacent following blade such that the chipbreaker on the preceding blade intersects between two chipbreakers on the immediately adjacent following blade for a particular direction of rotation of the rotary cutting tool.