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 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 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;
• wherein the first radius comprises a maximum tool cutting radius for the cutting tool;
• wherein a gap distance between the foam chip shedding exclusions and the maximum tool cutting radius equals at least 15% of a radial height of the flute;
• and
• wherein the helical flute comprises a negative cutting angle configured to push foam chips to an unfixtured end of the tool.