Tool

Abstract

The invention relates to a tool for the machining of bores. The tool includes a tool body with a centre axis and a tool end face. At least two secondary cutting edges are formed on the tool body; each secondary cutting edge of the at least two secondary cutting edges, starting from a cutting corner corresponding with the secondary cutting edge on the tool end face, extending in the direction of the centre axis towards a shaft end of the tool in a helical manner with a specific twist pitch. A support collar adjoins each of the secondary cutting edges at a distance, measured in the direction of the centre axis, of at least 0.18 times up to at most 0.28 times the specific twist pitch from the corresponding cutting corner, which support collar extends in the circumferential direction at least up to 1700 to the corresponding cutting corner.

Dependencies are inferred from the claim text.