Tool system for machining a workpiece

A cutting tool system for machining a workpiece, comprising:

• a cylindrical holding shank (with a workpiece-side end and an opposing drive-side end, wherein a cutting head fixture is arranged on the workpiece-side end, and wherein a drive fixture is arranged on the drive-side end,
• a cutting head with at least one cutting edge and with a cutting head hub matching with the cutting head fixture of the holding shank;
• and
• a tool coupling with a tool interface and with a coupling hub matching with the drive fixture;
• wherein the cutting head hub comprises elevated regions with bearing faces, wherein the bearing faces bear against corresponding supporting faces of the cutting head fixture of the holding shank, wherein the elevated regions are distributed both in a circumferential direction of the cutting head hub and along the cutting head hub, wherein interspaces are provided between the elevated regions, and wherein the cutting head fixture is firmly connected to the cutting head hub by means of a joining material introduced into the interspaces between the elevated regions.

A tool coupling for a cutting tool system for machining a workpiece, the cutting tool system having a cylindrical holding shank which has a drive fixture with supporting faces on a drive-side end:

• the tool coupling having a coupling hub matching with the drive fixture,
• the coupling hub having elevated regions with bearing faces,
• the elevated regions being arranged so as to be distributed both in a circumferential direction of the coupling hub and along the coupling hub,
• the bearing faces bearing against supporting faces of the drive fixture of the holding shank,
• the drive fixture of the holding shank being firmly connected to the coupling hub of the tool coupling by means of a joining material introduced into interspaces between the elevated regions.

A cutting head for a cutting tool system for machining a workpiece, the cutting tool system having a cylindrical holding shank which has a cutting head fixture with supporting faces on a workpiece-side end:

• the cutting head having at least one cutting edge,
• the cutting head having a cutting head hub matching with the cutting head fixture,
• the cutting head hub having elevated regions with bearing faces,
• the elevated regions being arranged so as to be distributed both in a circumferential direction of the cutting head hub and along the cutting head hub,
• the bearing faces bearing against supporting faces of the cutting head fixture of the holding shank,
• the cutting head fixture being firmly connected to the cutting head hub by means of a joining material introduced into interspaces between the elevated regions.