Coupling mechanism for cutting tool

A rotary cutting tool comprising:

• a cutter of generally cylindrical shape disposed about a central longitudinal axis, the cutter having a first end having an active fluted portion and an opposite second end, the second end having a male threaded portion disposed thereabout;
• and
• a shank of generally cylindrical shape disposed about the central longitudinal axis, the shank having a recessed female threaded portion formed in a first end,
• wherein the male threaded portion includes a number of threads disposed at a first pitch and at a first taper angle,
• wherein the female threaded portion includes a number of threads disposed at a second pitch and at a second taper angle different than the first taper angle, and
• wherein the cutter and the shank are selectively coupled via threaded engagement of the male threaded portion and the female threaded portion.