lateral surface of the same said lateral surface conically expanding toward the cutting edges the openings of the channels are placed in the area of concave recesses of the lateral surface of the drill bit in such a manner that they are recessed with regard to the periphery of the face of the drill bit application_number US 47800703 A description in the embodiment shown in fig1 to 8 the drill bit 1 on its face has three cutters 2 which are curved with the same radius of curvature and in the same direction with cutting edges 3 which run toward the middle of the face and which meet one another in the middle i e in the axis 4 of the drill bit 1 in the drill bit 1 there is a blind hole 5 which emerges from the end of the drill bit 1 opposite the face surface and which has an inside thread so that the drill bit 1 can be screwed onto an anchor rod which has an external thread as is used for injection drill anchors from the blind hole 5 in the illustrated embodiment three channels 10 emerge which are tilted to the axis 4 of the drill bit 1 at an acute angle for example an angle of 30 u00b0 compare fig6 the channels 10 are aligned in the drill bit 1 such that their mouths 11 discharge on the side surface of the drill bit 1 in the area between two adjacent cutters 2 the discharges 11 of the channels 10 as is shown for example in fig1 to 4 and especially the section from fig6 lie in the area of concavely curved surfaces 12 which are roughly normal to the plane which is defined by the cutting edges 3 therefore essentially.