METAL CUTTING TOOL AND CUTTING PLATE PROVIDED IN THE SHAPE OF A DONUT

摘要

The invention relates to a metal cutting tool essentially comprised of a supporting tool (13), which has a recess for accommodating a cutting plate (10). The cutting plate (10) is provided with a clamping trough (11), which is held in the supporting tool (13) by a clamping claw (16). The clamping claw (16) is fixed against the supporting tool (13) by a clamping screw (17). A pressure piece (14) is placed on the clamping claw (16) and its underside facing the cutting plate (10) is provided with a cam, which is in contact wi th the clamping trough (11), and the clamping claw (16) pulls the pressure piec e (14) toward the clamping screw (17). According to the invention, the clampin g trough (11) is provided with a circular shape and has a spherical or circula r elevation (12) in the center. The cam on the pressure piece (14) consists of a circular ring (21), which is adapted thereto and tightly engages in the clamping trough (11) while surrounding the elevation (12).