Tool for machining a workpiece

A tool for machining a workpiece comprising;

• a shank which is drivable rotatably about a longitudinal axis and is fixable to a tool holding fixture,
• a plate holding fixture that is arranged on one end of the shank,
• a support plate having at least one internal thread,
• a cutting element with at least one cutting edge, wherein the cutting element is fixed in an integrally bonded manner to the support plate, and
• at least one fastening element which is provided with an external thread that is adapted to the at least one internal thread,
• wherein the plate holding fixture comprises a groove and a bearing surface for bearing the support plate,
• wherein two side surfaces of the groove taper towards each other in a direction of a base of the groove, such that the two side surfaces of the groove enclose an internal angle,
• wherein at least one recess reaches through the bearing surface,
• wherein the support plate comprises a bearing mating surface and two side mating surfaces,
• wherein the two side mating surfaces of the support plate taper towards each other to form an external angle, and
• wherein the support plate is fixable to the plate holding fixture by way of the at least one fastening element in such a manner that the bearing mating surface of the support plate bears against the bearing surface of the plate holding fixture, each side mating surface of the two side mating surfaces of the support plate bears against a corresponding side surface of the two side surfaces of the groove, and the cutting element is positioned with respect to the longitudinal axis.