Rotary cutting tool

A rotatable cutting tool, comprising:

• an elongate body having a longitudinal axis, a proximal end and a distal end;
• at least one helical single cutting-edge flute extending over a length of the elongate body, the helical flute having a first end and a second end, the helical flute comprising:
• a cutting-edge with a first radius from a longitudinal center of the cutting tool;
• a trailing edge with a second radius from a longitudinal center of the cutting tool, wherein the second radius is smaller than the first radius;
• a flute surface between the cutting-edge and the trailing edge, the flute surface including a maximum radius at the cutting-edge;
• and
• a plurality of foam chip shedding exclusions evenly spaced along the cutting-edge of the helical flute, each of the foam chip shedding exclusions providing a gap in the cutting-edge where the radius within the gap is smaller than the first radius.

A rotatable cutting tool, comprising:

• an elongate body having a longitudinal axis, a proximal end and a distal end;
• at least one helical double cutting-edge flute extending over a length of the elongate body, the helical flute having a first end and a second end, the helical flute comprising:
• a leading cutting-edge with a first radius from a longitudinal center of the cutting tool;
• a trailing cutting-edge with a second radius from a longitudinal center of the cutting tool, wherein the second radius is equal to the first radius;
• a trailing edge with a third radius, wherein the third radius is smaller than the first radius;
• a first flute surface between the leading cutting-edge and the trailing cutting-edge, the first flute surface including a maximum radius at the leading cutting-edge;
• a second flute surface between the trailing cutting-edge and the trailing edge, the second flute surface including a maximum radius at the trailing cutting-edge;
• and
• a plurality of foam chip shedding exclusions evenly spaced along the leading cutting-edge of the helical flute, each of the foam chip shedding exclusions providing a gap in the leading cutting-edge where the radius within the gap is smaller than the first radius.