Modular drill with enhanced bump-off capability

A rotary cutting tool with enhanced bump-off capability, comprising:

• a tool shank having a pocket;
• a replaceable cutting head at least partially disposed within the pocket of the tool shank with an interference fit;
• a coupling pin assembly at least partially received within a bore of the tool shank, the coupling pin assembly comprising a sleeve member and a coupling pin at least partially disposed within the sleeve member, the sleeve member including an upper portion and a lower portion extending radially outward with respect to the upper portion and having a non-circular cross-sectional shape with a bump-off surface, the coupling pin including an upper portion and a lower portion configured to make partial contact with the bore of the tool shank;
• and
• an actuation screw for contacting the coupling pin assembly and causing the replaceable cutting head to move relative to the tool shank,
• wherein the bump-off surface of the lower portion of the sleeve member extends radially outward with respect to the coupling pin by a distance, D, and contacts the actuation screw when moving the replaceable cutting insert from a clamped position to a bump-off position, thereby providing enhanced bump-off capability.