Komet Praezisionswerkzeuge Robert Breuning Gmbh

Andree Fritsch

Benno Spors

Jacek Kruszynski

Henry Schuett

Frank Roeser

Peter Leuze

Uwe Kretzschmann

Hans Haidinger

Alexander Krause

Helmut Morlok

Juergen Heilmann

Miltiadis Theodorou

A solid drill bit for machine tools. has a bit body and two movable inserts located a radial distance apart in insert seats of the bit body. The inserts have a rectangular or quadratic contour, project axially over the bit body with their major cutting edges and overlap in their working area. The outer movable insert projects radially beyond the periphery of the bit body with its outer cutting edge corner and with the adjoining minor cutting edge. Starting from the cutting edge corner, the minor cutting edge is inclined in the direction of the bit body at a setting angle of less than 3.2 &#xb0;. The minor cutting edge has a guiding edge that is slidingly supported against the wall of the bore over at least part of its length due to a radially outwardly oriented thrust force.

Solid drill bit for machine tools

A double or multiple-edged drilling tool has a base body rotatable about a drilling axis, and at least two plate seats arranged on the front face for accommodating identical interchangeable cutting plates. The cutting plates each have a machining face, and a clearance face adjoining a principal cutting edge forming a cutting wedge, and a seat face facing away from the clearance face. A guiding land adjoins radially outwardly through each edge the machining face, the clearance face and optically the seat face. The cutting plates each have a hole for a retaining screw which is screwed into a threaded bore at the front face of the base body. The holes are aligned with their axis perpendicular to the clearance face of the associated cutting plates the threaded bores are aligned inclined to the drilling axis and inclined to each other in the base body.

Drilling tool

The tool has a tool shank (which may be hollow) ( ), whilst the machine spindle has a connecting sleeve ( ) containing a recess ( ) to accommodate the tool shank. A clamping mechanism ( ) is located in the area between the tool shank ( ) and the connecting sleeve ( ). This mechanism has at least one clamping element ( &Prime;), with radial movement, which acts as a wedge drive, providing axial clamping movement between the tool shank ( ) and connecting sleeve ( ). The clamping mechanism comprises an actuating nut ( ), which screws onto an exterior thread ( ) on the connecting sleeve ( ) and is coaxial in relation to the spindle axis. During the clamping procedure, the axial movement of the actuating nut can be converted into the radial movement of the clamping element ( &Prime;), with the help of at least one connecting link ( &Prime;).

Device for detachably connecting a tool

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Freudental, Germany

Andree Fritsch