Drill head for chambering non-cylindrical inner contours

Drill head for chambering, comprising a body with a rear end and a front end, the body having a mechanical interface at the rear end for connection to a drill tube, the body having an end face and comprising a central hole, the drill head comprising first and second insert holders which are pivotably mounted on the body, and the first and second insert holders and an advancing element being coupled to one another via a link motion in such a way that a movement of the advancing element in the axial direction relative to the body triggers a pivoting movement of the first and second insert holders, and the advancing element is axially displaceably guided in the hole along a central axis of the drill head,

• wherein, the advancing element comprises a first slot diagonally formed along a first slot axis having a first inclination with respect to the central axis and a second slot diagonally formed along a second slot axis having a second inclination with respect to the central axis, wherein the first inclination and the second inclination are reverse in relation to each other, one of a first pin and a first roller are provided on the first insert holder, one of a second pin and a second roller are provided on the second insert holder, the first pin or the first roller of the first insert holder configured to interact with the first slot of the advancing element, and the second pin or the second roller of the second insert holder configured to interact with the second slot of the advancing element, wherein a bearing pin having a longitudinal axis is provided on the end face of the body and pivotably mounts the first and second insert holder to the body.