Rotary cutting tool with high-pressure coolant cap

A rotary cutting tool, comprising:

• a cutter body having a recessed surface formed in a front face of the cutter body, the recessed surface including a retaining ring notch formed therein;
• a retaining screw which mounts the cutter body to a rotatable component;
• the retaining screw including at least one passage which directs high pressure coolant toward the front face of the cutter body;
• a coolant cap disposed within the recessed surface of the cutter body, the coolant cap including an outer surface, an inner surface and a cylindrical outer surface extending between the outer surface and the inner surface;
• and
• a retaining ring disposed within the retaining ring notch of the cutter body, to removably secure the coolant cap to the cutter body;
• wherein the outer surface of the coolant cap contacts the retaining ring when high pressure coolant is introduced into the cutter body;
• a coolant chamber in communication with the at least one passage of the retaining screw, wherein the coolant chamber is formed by the retaining screw, the cutter body and the inner surface of the coolant cap;
• wherein the inner surface of the coolant cap is positioned in a spaced-apart relationship with respect to the retaining screw and the cutter body, and the inner surface of the coolant cap includes a planar bottom inner surface which faces the retaining screw;
• wherein the inner surface of coolant cap further includes:
• an arcuate inner surface extending radially outwardly and axially away with respect to the planar bottom inner surface;
• and
• a planar top inner surface extending radially outwardly from the arcuate inner surface to the cylindrical outer surface
• whereby high-pressure coolant enters the coolant chamber and is directed:
• onto the planar bottom inner surface of the coolant cap, radially and axially away from the planar bottom inner surface, and radially outwardly to a vicinity of cutting inserts mounted on the cutter body.