External deburring tool

A deburring tool, comprising:

• a deburring head including a conical hollow body having an interior conical surface, an exterior conical surface, at least one flute extending between the interior and exterior conical surfaces, and at least one recessed cutout defined in the interior conical surface, the flute having opposed first and second wall surfaces, the first wall surface adjoining a first area of the interior conical surface at an obtuse angle, the second wall surface adjoining a second area of the interior conical surface, the recessed cutout being defined in the second area of the interior conical surface and having a bottom surface adjoining the second wall surface of the flute at an acute angle and a wall surface adjoining a third area of the interior conical surface;
• a primary cutting edge formed at a junction of the second wall surface of the flute and the bottom surface of the recessed cutout;
• and a secondary cutting edge formed at a junction of the wall surface of the recessed cutout and a third area of the interior conical surface, and in a rotating direction of the deburring head, with the flute being in front, the secondary cutting edge being behind, and the primary cutting edge being between the flute and the secondary cutting edge, the primary and secondary cutting edges work together to cut an end of a workpiece in the conical hollow body;
• and
• a shaft portion having one end joined to the conical hollow body and the other end provided for engagement with a driving tool.