Patent ID: 6840716

Claim:
A cutting tool, having an axis of rotation (A), comprising an insert holder and at least one cutting insert mounted therein in a respective insert receiving pocket formed in a front portion of the insert holder; the insert receiving pocket comprising a longitudinally extending inner wall substantially co-directional with the axis of rotation (A) of the cutting tool, at least a portion of the inner wall constitutes a radial abutment surface of the insert receiving pocket, a rear wall adjacent the inner wall and substantially perpendicular thereto, a lower wall adjacent the inner wall and the rear wall and substantially perpendicular thereto, a front end of the lower wall protruding forwardly with respect to a central portion of the insert holder adjacent the axis of rotation (A) of the cutting tool, a threaded bore extending downwardly from the lower wall, a rear protrusion rising upwardly from the lower wall and a front protrusion rising upwardly from the lower wall and extending inwardly and rearwardly from periphery of the insert holder, the front protrusion has a front surface perpendicular to the lower wall of the insert receiving pocket, a rear surface and a top surface connecting between the front surface and the rear surface; the at least one cutting insert comprises an insert top surface, a bottom surface and a side surface extending between the insert top surface and the bottom surface, a central through bore having an axis extending between the insert top surface and the bottom surface, two holder engaging grooves formed in the bottom surface, each holder engaging groove having a distal side wall distal from the axis of the through bore and perpendicular to the bottom surface, a proximal side wall proximal to the axis of the through bore and a groove top surface connecting between the distal side wall and the proximal side wall; in an assembled position of the at least one cutting insert within the respective insert receiving pocket the at least one cutting insert is retained by a clamping screw that passes through the through bore and threadingly engages the threaded bore, the bottom surface of the at least one cutting insert abuts the lower wall of the insert receiving pocket, a radial abutment surface formed in the side surface of the at least one cutting insert adjacent the inner wall of the insert receiving pocket abuts the radial abutment surface of the insert receiving pocket, the front surface of the front protrusion abuts the front distal side wall of one of the holder engaging grooves and a rear portion of the at least one cutting insert is spaced from the rear wall of the insert receiving pocket.