Ceratizit Austria Gmbh

Ceratizit Austria Ges. M.b.h.

Ceratizit Austria Gesellschaft M.b.h.

Rudolf Rofner

Remus Venturini

Harald Urschitz

Dietmar Berger

A polygonal indexable insert has cutting edges that run rectilinearly or in a curved manner in a plane perpendicular to a locating surface and that fall from cutting corners having acute angles to cutting corners with obtuse angles following one another alternately. The cutting edges have a rake face which first of all falls and then rises with a back region. The back region together with a center part of the indexable insert forms an intersection curve. The intersection curve lies at a distance a from the starting point of the associated cutting edge in the region of the cutting corners in each case at their intersection with the angle bisector. It is at a distance b from the end point of the associated cutting edge in the region of the cutting corners in each case at their intersection with the angle bisector. The distance b is greater than the distance a.

Indexable insert

The invention relates to a cutting tool for rotating and drilling into solid blocks, comprising a drill shank () and a cutting head () on one end. The cutting head () has a straight, front-face cutting edge () extending approximately crosswise in relation to the drill axis (). The cutting head () also comprises a section () protruding from the shank of the drill () at a height (h) ranging from at least 5% to a maximum of 40% of the diameter (d) of the drill and at a width (b) ranging from at least 5% to a maximum of 40% of the diameter (d) of the drill. The section () comprises a straight, lateral cutting edge () which merges into a straight, rear-sided cutting edge () extending in an approximately parallel manner in relation to the front-faced cutting edge ().

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Heiterwang, Austria

Rudolf Rofner