Kennametal Inc.

Bernhard Eckl

Xaver Spichtinger

Michael Schuffenhauer

Armin Zimmermann

Herbert Rudolf Kauper

Heinrich Manner

Li Ning

Marcus Paul

Armin Josef Zimmerman

Thilo Klaus Juergen Mueller

The combination tool (), in particular a drilling/chamfering tool, comprises a drill () extending in the longitudinal direction () with a clamping sleeve (), which is designed to receive the drill () and fasten the drill () at a variable length and which has a holding seat () for a cutting insert (). The drill () comprises a cutting region () provided with grooves (), wherein the grooves () extend helically and are formed between two grooves () drill backs (). At least one of the drill backs () is partially flattened to form an adjustment surface () for the cutting insert (), wherein the adjustment surface () extends helically. As a result, a length adjustment over a large length range is made possible independently of the twist angle (γ).

Combination tool as well as drills for such a drilling/chamfering tool

A multi-flute reamer includes a cutting portion having a forward end and a rearward end, and a chip flute with a chip gash opening, and a cutting insert mounted on the cutting portion. A leading edge is formed at an intersection between a top surface and a radially-outward side surface, and a front edge is formed at an intersection between the top surface and a forward side surface. The cutting insert includes a rounded lead cutting edge formed at the intersection between the leading edge and the front edge, and the top surface includes a chip breaker having a bottom surface formed with a radius, R.

Multi-flute reamer and cutting insert therefor

A tool head () for a rotating tool () includes a basic body (), an annular portion () arranged on an end face on the basic body () and surrounds a cavity (), and an adjusting device () including an adjusting screw () with a shank () and an adjusting sleeve (). The shank () having a first shank portion () engaging a threaded bore () in the basic body (). The adjusting sleeve () is displaceable by the adjusting screw () and has a conical outer face () that interacts with an inner face () of the annular portion () in such a way that, when the adjusting screw () is being screwed into the threaded bore (), the annular portion () is spread open by the adjusting sleeve ().

Tool head for a rotating tool

The invention relates to a cutting tool for a machine tool, comprising a cutting head (), a shaft (), and a coupling which removably fixes the cutting head () to the shaft (), said coupling comprising a coupling pin () on the back of the cutting head () and a receptacle () in the shaft (), which receptacle is complementary to the coupling pin () and accommodates the coupling pin () when the coupling is closed, comprising a central coolant channel () in the shaft (), which separates into two sub-channels () in the region of the receptacle (), the two sub-channels () flanking the receptacle () in the wall thereof and opening into the flat contact surface () annularly surrounding the opening edge () of the receptacle (), and comprising a flat collar () on the back of the cutting head () having an annular distribution groove (). The tool also comprises at least one coolant hole () connecting the cutting edges () on the cutting head () to the distribution groove ().

Growing community of inventors

Rottendorf, Germany

Bernhard Eckl