Roller drilling tool to tear material, such as especially rock, minerals or the like, according to the principle of beading, comprising a cutting surface (12) formed concentrically around a central axis (M) and conically widened towards the front side ( 11) of the roller drilling tool, and a support body (15) which is arranged on the inner side of the cutting surface (12) and extends to the front side (11) of the tool, characterized in that the surface cutting (12) is made of a harder material than the support body (15) and because the support body (15) forms an annular core (22) conical at least in an outer peripheral wall (20), whose soul limits with its inner peripheral wall (23) a free space (21) on the front side (11) of the tool.
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