Cutting tool

An apparatus for metal cutting, comprising;

• a tool comprising a first main body defining an axis and including:
• a first part having a cutter-receiving site adapted to detachably receive at least one metal cutter,
• a second part spaced axially from the first part and including an envelope surface of axially tapering shape,
• a first channel section disposed in the first main body and opening into the envelope surface to form a radially extending first hole therein, and
• a nozzle disposed in the first main body, the nozzle communicating with the firs channel section and being directed toward the cutter-receiving site;
• a clamping unit comprising a second main body including:
• a seat in which the second part is seated, the seat having an axially tapering shape corresponding to the axially tapering shape of the envelope surface, and
• a second channel section for conducting cooling fluid to the first channel section, the second channel section opening into the seat to form a radially extending second hole therein, the second hole being aligned with the first hole whereby the transfer of cooling fluid from the first hole to the second hole occurs in a radial direction;
• a recess surrounding one of the first and second holes;
• and
• a sealing ring disposed in the recess, the sealing ring formed of an elastic material and having a generally rectangular cross section, a thickness of the sealing ring in a stress free state being greater than a depth of the recess, whereby the sealing ring is pressed into the recess when the envelope surface is seated in the seat;
• wherein the first main body includes an additional channel for conducting cooling fluid, and an additional nozzle communicating with the additional channel for directing the cooling fluid toward the cutter site, the cooling fluid conducted through the additional channel being of less pressure than the cooling fluid conducted through the first and second channel sections.