Through coolant clamps for tool holders

A through coolant clamp for providing coolant fluid to a cutting insert comprising:

• a base portion;
• a coolant fluid reservoir chamber within the base portion extending radially rearward from a clamp screw hole extending from a clamp top surface of the through coolant clamp to a clamp bottom surface of the through coolant clamp;
• a nose portion extending radially forward from the base portion;
• and
• at least one nozzle within the nose portion extending along a nozzle axis, wherein each nozzle of the at least one nozzle comprises:
• a nozzle inlet in fluid communication with the coolant fluid reservoir chamber;
• a nozzle outlet opposite the nozzle inlet;
• and
• a nozzle coolant channel extending between the nozzle inlet and the nozzle outlet along a nozzle coolant channel axis;
• and
• a transition outer surface in fluid communication between the coolant fluid reservoir chamber and the nozzle inlet of the at least one nozzle forming a smooth transition between the coolant fluid reservoir chamber and the nozzle inlet such that a transition angle measured in a plane perpendicular to the longitudinal axis of the through coolant clamp between at least a portion of the transition surface and the nozzle coolant channel axis is less than 60°.

A clamp screw for a through coolant tool holder clamp assembly, the clamp screw comprising:

• a threaded lower portion;
• a head at an end of the clamp screw opposite the threaded lower portion;
• an upper portion between the threaded lower portion and the head;
• an internal coolant axial passage having an inlet opening adjacent the threaded lower portion and extending to the upper portion;
• and
• at least one coolant radial channel in fluid communication with the coolant axial passage and having a radial outlet opening through an outer surface of the upper portion.