A milling cutting insert has a substantially triangular shape. The cutting insert contains a top side, an underside, and circumferential side surfaces extending between the top side and the underside. Cutting edges are formed at the transition of the circumferential side surfaces to the top side and/or the underside. On the circumferential side surfaces at least two discrete planar abutment surfaces are formed for positioning the cutting insert in a tool holder. The at least two discrete planar abutment surfaces are inclined with respect to each other at an outer angle of between 190° and 220° and the abutment surfaces are spaced from each other with respect to the circumferential direction of the cutting insert.

A milling cutting insert has a substantially triangular shape. The cutting insert contains a top side, an underside, and circumferential side surfaces extending between the top side and the underside. Cutting edges are formed at the transition of the circumferential side surfaces to the top side and/or the underside. On the circumferential side surfaces at least two discrete planar abutment surfaces are formed for positioning the cutting insert in a tool holder. The at least two discrete planar abutment surfaces are inclined with respect to each other at an outer angle of between 190° and 220° and the abutment surfaces are spaced from each other with respect to the circumferential direction of the cutting insert.

A cutting tool includes a body, a blade, and a position adjustment screw. The body surrounds an axial line. The blade includes a cutting edge portion and a shank portion. The position adjustment screw is in contact with the shank portion. The position adjustment screw includes a head portion in contact with the shank portion and a joint portion continuous to the head portion and joined to the body. The head portion includes a tip end surface in contact with the shank portion, a connection surface continuous to the joint portion, and an outer circumferential surface continuous to each of the tip end surface and the connection surface. When viewed in a direction perpendicular to the axial line, a part of the outer circumferential surface is exposed through the second hole and a remainder of the outer circumferential surface is covered with the body.

A cutting tool includes a body, a blade, and a position adjustment screw. The body surrounds an axial line. The blade includes a cutting edge portion and a shank portion. The position adjustment screw is in contact with the shank portion. The position adjustment screw includes a head portion in contact with the shank portion and a joint portion continuous to the head portion and joined to the body. The head portion includes a tip end surface in contact with the shank portion, a connection surface continuous to the joint portion, and an outer circumferential surface continuous to each of the tip end surface and the connection surface. When viewed in a direction perpendicular to the axial line, a part of the outer circumferential surface is exposed through the second hole and a remainder of the outer circumferential surface is covered with the body.

Milling tool holder which comprises a first holder part, a second holder part, and a locking mechanism. The first holder part comprises a first cutting insert receptacle for receiving a first cutting insert and a second cutting insert receptacle for receiving a second cutting insert. The second holder part which, for adjusting a milling width, is variably positionable with respect to the first holder part along a longitudinal axis, comprises a third cutting insert receptacle for receiving a third cutting insert and a fourth cutting insert receptacle for receiving a fourth cutting insert. The locking mechanism is configured to fix the first and second holder parts to the adjusted milling width. The first holder part and the second holder part are positioned with respect to one another in such a manner that the third cutting insert receptacle is arranged in the circumferential direction between the first cutting insert receptacle and the second cutting insert receptacle, and that the second cutting insert receptacle is arranged in the circumferential direction between the third cutting insert receptacle and the fourth cutting insert receptacle.

A cutting tool includes a novel cutting insert retaining and adjusting mechanism. The cutting insert retaining and adjusting mechanism is associated with a recess in the cutting tool and includes a nest slidably mounted in the recess. The nest includes a cutting insert pocket. The cutting insert retaining and adjusting mechanism includes a first wedge adapted to selectively exert pressure on the nest to retain the nest in a desired position in the recess, and a second wedge adapted to selectively exert pressure on a cutting insert positioned in the cutting insert pocket to retain the cutting insert in a desired position. The mechanism further includes an adjustment screw including a first threaded portion and a second threaded portion. The first threaded portion is threadedly disposed in a threaded bore in the cutting tool body, and the second threaded portion is threadedly disposed in a threaded bore in the nest. The first threaded portion has the same handedness but a different thread pitch as the second threaded portion. Rotating the adjustment screw axially slidably advances and retracts the nest in the recess.

A cutting tool includes a novel cutting insert retaining and adjusting mechanism. The cutting insert retaining and adjusting mechanism is associated with a recess in the cutting tool and includes a nest slidably mounted in the recess. The nest includes a cutting insert pocket. The cutting insert retaining and adjusting mechanism includes a first wedge adapted to selectively exert pressure on the nest to retain the nest in a desired position in the recess, and a second wedge adapted to selectively exert pressure on a cutting insert positioned in the cutting insert pocket to retain the cutting insert in a desired position. The mechanism further includes an adjustment screw including a first threaded portion and a second threaded portion. The first threaded portion is threadedly disposed in a threaded bore in the cutting tool body, and the second threaded portion is threadedly disposed in a threaded bore in the nest. The first threaded portion has the same handedness but a different thread pitch as the second threaded portion. Rotating the adjustment screw axially slidably advances and retracts the nest in the recess.

A cartridge for a cutting insert has a carrier, a rocker, which is attached to the carrier so as to be pivotable and has a seat for a cutting insert, and an adjusting element for adjusting the rocker relative to the carrier.

A cartridge for a cutting insert has a carrier, a rocker, which is attached to the carrier so as to be pivotable and has a seat for a cutting insert, and an adjusting element for adjusting the rocker relative to the carrier.

The present invention relates to a tool body provided with at least one insert seat. The insert seat comprises a bottom wall surface and a side wall surface. The side wall surface comprises a first side wall surface and a second side wall surface. The first side wall surface comprises at least two surface portions. The first surface portion is a curved surface in a recessed shape, and the second surface portion is a curved surface in a recessed shape having a greater curvature radius than that of the first surface portion or a flat surface. The two surface portions both come into contact with a cutting insert.