Turning toolholder with enhanced coolant delivery system

A turning toolholder, comprising:

• a shank having a main coolant supply hole extending therethrough;
• a club head at an axially forward end of the shank, the club head having an insert-receiving pocket for receiving a cutting insert, the cutting insert having a top rake surface and one or more side flank surfaces, the club head including a clamp coolant supply hole in fluid communication with the main coolant supply hole and a flank coolant supply hole in fluid communication with the main coolant supply hole, and a flank coolant housing monolithic with the club head and having a flank coolant exit opening protruding axially outward from a front surface of the club head and located below the insert-receiving pocket;
• a clamp arranged on the club head, the clamp including a forward nose portion with a downward-extending nub, the clamp including an aperture formed therethrough, the clamp including a rake coolant supply hole extending from the aperture to a rake coolant exit opening in the forward nose portion of the clamp;
• and
• a clamp screw capable of being inserted through the aperture of the clamp and at least partially received in a clamp-securing bore of the club head to bring the clamp into pressing engagement with the cutting insert, the clamp screw having a head portion, a non-threaded portion, a threaded portion and an annular groove disposed between the non-threaded portion and the threaded portion, the annular groove capable of receiving a sealing member for sealing the clamp screw within the clamp-securing bore, the clamp screw having a central, longitudinal axis and including an internal coolant supply hole in fluid communication with both the main coolant supply hole and the clamp coolant supply hole of the club head for providing coolant to the clamp, the internal coolant supply hole having an axially-extending portion extending along the central, longitudinal axis of the clamp screw and a plurality of radially-extending portions, each radially-extending portion in fluid communication with the axially-extending portion and having a central axis that extends at an angle with respect to the central, longitudinal axis of the clamp screw,
• wherein coolant is supplied from the main coolant supply hole, through the internal coolant supply hole of the clamp screw, through the rake coolant supply hole of the clamp, and exits from the rake coolant exit opening in the forward nose portion of the clamp to direct coolant to the top rake surface of the cutting insert,
• wherein coolant is supplied from the main coolant supply hole, through the flank coolant supply hole, and exits the flank coolant exit opening to direct coolant to the side flank surface of the cutting insert, and
• wherein the flank coolant exit opening directs coolant at an angle with respect to a central axis of an internally threaded bore formed in a bottom surface of the insert-receiving pocket of the club head.