Emuge-werk Richard Glimpel Gmbh & Co Kg Fabrik Fur Prazisionswerkzeuge

Emuge-werk Richard Glimpel Gmbh & Co.

Thomas A Zeus

Helmut Glimpel

Dietmar Hechtle

Thomas Berschneider

This invention relates to a screw tap which is rotatable about a rotational axis and has a number of thread-cutting teeth, which respectively have a radially outer tip cutter and are disposed mutually offset, with a predefined thread pitch, in an arrangement running spirally or helically around the rotational axis. In a lead region adjoining one end of the screw tap axially to the rotational axis, the maximum radial distance of the tip cutters of the thread-cutting teeth from the rotational axis increases with increasing axial distance of the tip cutters from one end of the screw tap according to a predefined radial distance function. At least some of the thread-cutting teeth in the lead region, at least in the region of the tip cutters, respectively have a defined cutter rounding between tool face and tool flank.

Screw tap and method for the production of a screw tap

The tool for the chipless production of a thread, in particular for producing an internal thread, is in its forming height, pitch of the pressing lands and/or pressing surfaces adapted to the material of the workpiece in a special manner.

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Hersbruck, Germany

Thomas A Zeus