Tool for machining a workpiece

A tool for machining a workpiece, comprising:

• a holder having a locating opening arranged at an end face of the holder,
• a cutting head having a cutting head parent body made of steel and a blade carrier with at least one cutting element arranged thereon, wherein the blade carrier is brazed or welded on a workpiece-side end of the cutting head parent body, wherein the workpiece-side end of the cutting head parent body has a first diameter,
• a sleeve, wherein the sleeve is made substantially of carbide, wherein the sleeve has a first end, wherein the first end of the sleeve is inserted and accurately fitted into the locating opening arranged at the end face of the holder, and
• a coupler, wherein the coupler couples the holder, the cutting head, and the sleeve,
• wherein the cutting head parent body comprises an extension that is arranged on a holder-side end of the cutting head, wherein the holder-side end of the cutting head is opposite the workpiece-side end of the cutting head, wherein the extension projects into a second end of the sleeve, wherein the second end of the sleeve is opposite and facing away from the first end of the sleeve, wherein the extension has a second diameter, wherein the second diameter is smaller than the first diameter of the workpiece-side end of the cutting head parent body, and
• wherein the second end of the sleeve contacts the cutting head parent body at a surface of the cutting head parent body perpendicular to a longitudinal axis of the cutting head, wherein the surface of the cutting head parent body perpendicular to the longitudinal axis is arranged between the workpiece-side end of the cutting head parent body and the extension.