Kennametal Inc.

Gary L Morsch

Gerald D Murray

James R Lyon

James B Robinson

A toolholder is provided for receiving, pressurizing, and conducting an external stream of coolant to a rotating cutting tool without mechanical containment between the toolholder and the coolant stream. The toolholder includes a shank attachably connectable to a rotatable drive shaft, an adapter, such as a collet chuck, for connecting a rotatable cutting tool to the shank, and a coolant inducer mounted between the shank and the adapter. The coolant inducer is formed from an impeller assembly having a plurality of uniformly spaced, coolant receiving openings around its periphery for receiving an uncontained coolant stream. A passageway is provided along the axis of rotation of the adapter for receiving and conducting the coolant pressurized by the impeller assembly to a cutting tool secured in the adapter. The impeller-type coolant inducer eliminates the need for fluid seals or other friction-generating mechanical interfaces between the rotating toolholder and the source of pressurized coolant.

Toolholder having impeller-type coolant inducer

A cutting insert with improved chip control and metal cutting capabilities and a toolholder with an improved clamping arrangement for use in combination therewith. The insert includes a first notch disposed in the insert body extending from the cutting end to the mounting end thereof. A top wall of the insert body has a forward section with a cutting edge, a middle section with a second notch extending across substantially the entire insert body and a rearward section. In one embodiment, the forward section of the insert body includes a chipbreaker. In another embodiment, the forward portion includes an advanced cutting material which defines a cutting edge. In yet another embodiment of the insert, the insert body top wall forward section defines the cutting edge and the insert body does not include a chipbreaker.

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Dayton, MN, United States of America

Gary L Morsch