The invention describes an apparatus (1) for a cutting edge preparation of cutting tools (5), in particular of drills or milling tools or similar tools (5), in particular of hard-metal cutting tools, wherein during a relative movement the cutting tool (5) interacts in a machining fashion with a flexibly-bonded grinding body (2) that is provided with abrasive particles, the particles of the grinding body (2) influencing the edge geometry of the cutting tool (5),

wherein the grinding body (2) is adapted with its dimensions substantially to the dimensions of the respective cutting tool (5) that is to be prepared and is accommodated in an exchangeable holder (4) which is arranged in a region of a processing device, in particular of a tool grinding machine, and is held such that it is machinable by the cutting tool (5) for the cutting edge preparation. Furthermore, a corresponding method and a corresponding grinding body (2) are given.

The invention describes an apparatus (1) for a cutting edge preparation of cutting tools (5), in particular of drills or milling tools or similar tools (5), in particular of hard-metal cutting tools, wherein during a relative movement the cutting tool (5) interacts in a machining fashion with a flexibly-bonded grinding body (2) that is provided with abrasive particles, the particles of the grinding body (2) influencing the edge geometry of the cutting tool (5),

wherein the grinding body (2) is adapted with its dimensions substantially to the dimensions of the respective cutting tool (5) that is to be prepared and is accommodated in an exchangeable holder (4) which is arranged in a region of a processing device, in particular of a tool grinding machine, and is held such that it is machinable by the cutting tool (5) for the cutting edge preparation. Furthermore, a corresponding method and a corresponding grinding body (2) are given.

A reaming element for a reaming tool capable of being driven to rotate about an axis of rotation for fine machining of a prefabricated bore, the reaming element having a front main cutting edge and a secondary cutting edge adjoining the radially outward end of the main cutting edge, wherein the main cutting edge and the secondary cutting edge delimit a chip-removing surface, and a polished chamfer, which forms a support zone for guidance on the wall of the bore, is formed between the secondary cutting edge and the rear flank face thereof. The support zone is smaller than the polished chamfer and is kept a lateral distance away from the secondary cutting edge by an intermediate part, more particularly, a recessed intermediate part of the polished chamfer.

A reaming element for a reaming tool capable of being driven to rotate about an axis of rotation for fine machining of a prefabricated bore, the reaming element having a front main cutting edge and a secondary cutting edge adjoining the radially outward end of the main cutting edge, wherein the main cutting edge and the secondary cutting edge delimit a chip-removing surface, and a polished chamfer, which forms a support zone for guidance on the wall of the bore, is formed between the secondary cutting edge and the rear flank face thereof. The support zone is smaller than the polished chamfer and is kept a lateral distance away from the secondary cutting edge by an intermediate part, more particularly, a recessed intermediate part of the polished chamfer.