Kennametal Inc.

Julia Tempelmeier

Herbert Rudolf Kauper

Berthold Heinrich Zeug

Tim Guter

Jürgen Schwägerl

Juergen Schwaegerl

Horst Manfred Jäger

Peter Sollfrank

Rainer Buettner

Alexander Schmitt

A method is specified for producing a rotary tool () having a base body (), which extends in a longitudinal direction (L) and in which at least one flute () is ground in by grinding in a first partial flute (A) with a first helix angle (W) in a first grinding step and by subsequently grinding in a second partial flute (B) with a second helix angle (W) in a second grinding step, the second helix angle differing from the first helix angle (W) so that a flute () that expands in the longitudinal direction (L) is formed, wherein the two partial flutes (A,B) are ground in using the same grinding wheel (). In this way, a particularly quick production is realized. Furthermore, a corresponding rotary tool () is specified.

Method for producing a rotary tool and rotary tool

A rotary tool designed as a modular drill, extending in an axial direction along an axis of rotation. It comprises two coupling parts: a carrier; and a cutting head that is attached to the carrier so as to be exchangeable. The carrier includes pin receiving means, into which a coupling pin of the cutting head is introduced in a clamping manner and so as to be reversibly exchangeable. The pin receiving means and the coupling pin have torque sections and clamping sections that correspond to one another and are oriented parallel to the axis of rotation. In addition, to prevent axial pull-out, stop surfaces are provided on the pin receiving means and on the coupling pin, the stop surfaces being effective in an axial direction and corresponding to one another. These stop surfaces preferably extend horizontally and therefore perpendicular to the axis of rotation.

Rotary tool, in particular a drill, and a cutting head for said rotary tool

Wrench for modular drilling tools

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Roth, Germany

Julia Tempelmeier