A tool holder includes a coolant cavity opening out to a cavity inlet and outlet openings. The coolant cavity includes a cavity upper surface which extends along a cavity central axis. The cavity upper surface includes a cavity widening surface firstly which decreases in distance from the holder peripheral surface and secondly along which the cavity cross-sectional area increases, both with increasing distance from the cavity inlet opening. The cavity upper surface also includes a cavity narrowing surface, located further from the cavity inlet opening than the cavity widening surface, firstly which increases in distance from the holder peripheral surface and secondly along which the cavity cross-sectional area decreases, with increasing distance from the cavity inlet opening. A cutting tool is provided having a cutting insert releasably attached to the tool holder.

A tool holder includes a coolant cavity opening out to a cavity inlet and outlet openings. The coolant cavity includes a cavity upper surface which extends along a cavity central axis. The cavity upper surface includes a cavity widening surface firstly which decreases in distance from the holder peripheral surface and secondly along which the cavity cross-sectional area increases, both with increasing distance from the cavity inlet opening. The cavity upper surface also includes a cavity narrowing surface, located further from the cavity inlet opening than the cavity widening surface, firstly which increases in distance from the holder peripheral surface and secondly along which the cavity cross-sectional area decreases, with increasing distance from the cavity inlet opening. A cutting tool is provided having a cutting insert releasably attached to the tool holder.

An indexable parting blade has opposite blade first and second sides, a blade peripheral edge, a central index axis, and at least first, second and third insert pockets located along the blade peripheral edge. The parting blade also has first, second and third coolant channels, each forming a coolant path from a corresponding inlet to a corresponding one of the insert pockets. Each coolant channel includes a rake outlet opening out to a rake side of its corresponding insert pocket and a relief outlet opening out to a relief side of that same insert pocket. The inlet corresponding to a given coolant channel is located further from that coolant channel's insert pocket than at least one of (a) the inlet corresponding to a different coolant channel, and (b) the central index axis.

An indexable parting blade has opposite blade first and second sides, a blade peripheral edge, a central index axis, and at least first, second and third insert pockets located along the blade peripheral edge. The parting blade also has first, second and third coolant channels, each forming a coolant path from a corresponding inlet to a corresponding one of the insert pockets. Each coolant channel includes a rake outlet opening out to a rake side of its corresponding insert pocket and a relief outlet opening out to a relief side of that same insert pocket. The inlet corresponding to a given coolant channel is located further from that coolant channel's insert pocket than at least one of (a) the inlet corresponding to a different coolant channel, and (b) the central index axis.

A cutting insert for a machining tool having a cutting edge and a flute extending along the cutting edge is described. A chip breaker element which projects into the interior of the flute is disposed in the flute. Said chip breaker element comprises a chip guiding surface and each point of the chip guiding surface has a spacing from a flute contour that is greater than zero. The chip guiding surface furthermore either extends parallel to the flute contour and/or curved along two directions. A machining tool having such a cutting insert is presented as well.

A cutting tool, in particular for machining metal, is described. It comprises a tool main body that has at least one interface for receiving a cutting insert that can be attached to the tool main body. At least one cooling duct is provided in the tool main body and has, at its end on the interface side, an outlet section with an elongate outlet cross-section on the interface side. The tool main body is manufactured at least in sections by means of a generative manufacturing process. A method for manufacturing such a cutting tool is also presented.

A cutting tool, in particular for machining metal, is described. It comprises a tool main body that has at least one interface for receiving a cutting insert that can be attached to the tool main body. At least one cooling duct is provided in the tool main body and has, at its end on the interface side, an outlet section with an elongate outlet cross-section on the interface side. The tool main body is manufactured at least in sections by means of a generative manufacturing process. A method for manufacturing such a cutting tool is also presented.

A tool adaptor has a front retaining portion and a rear mounting portion, the front retaining portion having a base jaw, a clamping jaw, and an insert receiving pocket located therebetween, and the rear mounting portion having a rear mounting surface and a first fastening bore. A primary slot separates the base jaw from the clamping jaw and communicates with the insert receiving pocket, and a secondary slot transverse to the primary slot separates the clamping jaw from the rear mounting portion. The first fastening bore has a first bore axis which intersects the rear mounting surface and the secondary slot. A cutting tool assembly includes a tool shank, and the tool adaptor secured to a front mounting portion of the tool shank by means of a first fastening screw occupying the first fastening bore and a first shank bore of the front mounting portion.

A tool adaptor has a front retaining portion and a rear mounting portion, the front retaining portion having a base jaw, a clamping jaw, and an insert receiving pocket located therebetween, and the rear mounting portion having a rear mounting surface and a first fastening bore. A primary slot separates the base jaw from the clamping jaw and communicates with the insert receiving pocket, and a secondary slot transverse to the primary slot separates the clamping jaw from the rear mounting portion. The first fastening bore has a first bore axis which intersects the rear mounting surface and the secondary slot. A cutting tool assembly includes a tool shank, and the tool adaptor secured to a front mounting portion of the tool shank by means of a first fastening screw occupying the first fastening bore and a first shank bore of the front mounting portion.

A method for performing a cutting operation on a workpiece is provided. The method comprises providing a workpiece being made of a metal characterized by a thermal conductivity of no greater than about 100 W100 .sup.W/.sub.(m.Math.K) (approximately 57.8 .sup.Btu/.sub.(hr ft ° F.)), providing a cutting device comprising an internal cooling cavity defined on one side thereof by a thin-walled structure, and performing a cutting operation on the workpiece using the cutting device. The cutting speed is no less than about 500 .sup.m/.sub.min. (approximately 1640 .sup.ft/.sub.min).