Patent ID: 7357607

Claim:
A tool holder for use with a machine tool configured to provide coolant through a spindle thereof, said tool holder comprising: a shank portion configured to be received in said spindle, said shank portion comprising an axially extending coolant orifice configured to receive coolant from said spindle; a tool mounting portion comprising an axially extending tool mounting aperture configured to receive a tool shank; and a plurality of axial coolant passages radially spaced a distance from and extending substantially parallel to said tool mounting aperture, wherein said plurality of coolant passages are radially spaced from said tool mounting aperture between about 0.03125-0.0625 inches, said coolant passages extending directly from said coolant orifice to discharge a plurality of streams of coolant substantially parallel to, and a radially spaced distance from, a tool mounted in said tool holder, such that said plurality of streams of coolant are not aimed directly at said tool, wherein a distal end of said coolant orifice comprises a cavity having an inside diameter greater than an inside diameter of said coolant orifice and wherein a distal portion of said cavity comprises an inwardly tapered transition and said plurality of coolant passages extend from said cavity.