Combined drill and chamfer tool

A combined drill and chamfer tool for producing boreholes in a workpiece and for subsequently producing a chamfer on at least one bore edge of the borehole, comprising a drill bit, a drill shank, and at least one chamfering blade arranged behind the drill bit in the axial direction, said chamfering blade being mounted in a blade window arranged in the drill shank and spring-loaded so as to be displaceable transversely to the longitudinal axis of the combined tool, wherein a drill body comprising the drill bit and the drill shank is made of a solid hard metal material, and in that a spring-loaded, displaceable control bolt is located in a central longitudinal bore of the solid hard metal drill body, a front tip of said bolt controlling the transverse displacement of the chamfering blade, which is transversely displaceable within the blade window, and wherein an adapter sleeve, a diameter of which is equal to or smaller than that of the drill shank, is fastened onto a rear part of the drill shank, with a spring of the spring-loaded displaceable control bolt being arranged in the adapter sleeve.