Abstract: A tool system for machining a workpiece is provided having a cylinder-shaped retaining shank that has a cutting head holder on an end surface facing the workpiece, a drive mount on an end surface facing the drive, a cutting head having at least one cutting edge, a cutting head hub corresponding to the cutting head holder on the retaining shank, a tool coupling with a tool interface, and a coupling hub corresponding to the drive mount. The coupling hub or the cutting head hub have elevated areas, with contact surfaces, distributed in circumferential and longitudinal directions of the coupling hub or the cutting head hub. The contact surfaces make contact on support surfaces on the drive mount or on the cutting head holder on the retaining shank. The drive mount or the cutting head holder is permanently connected to the coupling hub or the cutting head hub by a joining material in intermediate spaces between the elevations.

Abstract: According to the invention a tool system for machining a workpiece is recommended, having a cylinder-shaped retaining shank (12) that has a cutting head holder (16) on an end surface (14) facing the workpiece, a drive mount (20) on an end surface facing the drive (18), a cutting head (22) having at least one cutting edge (24), a cutting head hub (26) corresponding to the cutting head holder (16) on the retaining shank (12), a tool coupling (28) with a tool interface (30), and a coupling hub corresponding to the drive mount (20), wherein the coupling hub (32) and/or the cutting head hub (26) have elevated areas (34, 50) with contact surfaces (36, 52), wherein the elevated areas (34, 50) are distributed in an arrangement in both the circumferential (38) and longitudinal directions of the coupling hub (32) and/or the cutting head hub (26), wherein the contact surfaces (36, 52) make contact on support surfaces (42, 56) on the drive mount (20) and/or on the cutting head holder (16) on the retaining shank (12), and