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 insert which is suitable for high cutting speed, a tool body thereof and a tool are provided. A tool according to the present invention is a tool in which a leading end thereof is provided with a force transmitting portion and for which a rotational axis extending from the leading end to a base end thereof is defined, wherein the tool comprises a cam portion which is arranged closer to the base end than the force transmitting portion and for which a dimension from the rotational axis of the tool varies in accordance with an angle at which the cam portion is rotated around the rotational axis.

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 insert which is suitable for high cutting speed, a tool body thereof and a tool are provided. A tool according to the present invention is a tool in which a leading end thereof is provided with a force transmitting portion and for which a rotational axis extending from the leading end to a base end thereof is defined, wherein the tool comprises a cam portion which is arranged closer to the base end than the force transmitting portion and for which a dimension from the rotational axis of the tool varies in accordance with an angle at which the cam portion is rotated around the rotational axis.

Cutting insert cartridge for chip removing machining tools has an axial adjustment system threadedly engaged with a cartridge body and a tool body. The axial adjustment system includes a differential screw in threaded engagement with the tool body either directly, for example by threaded engagement with a threaded opening in the tool body, or indirectly, for example by threaded engagement with a cross dowel fastener slidably positioned in an opening in the tool body. Actuation portion positioned axially between threaded end portions of the differential screw has an engagement feature on an outer surface to be driven, e.g., with a tool or by hand, to rotate the differential screw and adjust the axial position of the cartridge. The spaced apart relationship improves access to the actuation portion and engagement feature for rotation of the differential screw. Chip removing machining tools with such cartridges and methods of machining are also disclosed.

A cutting edge adjustment device for a cutting tool for adjusting the position of a cutting edge of a cutting insert by causing movement of the cutting insert includes a rotary member for producing the movement. The rotary member is formed into a shape in which a substantially cylindrical portion having a constant radius and a cam portion having a cam face whose radius is gradually increased in a manner corresponding to the amount of the movement are arranged in a direction of a rotational center axis. The cam face is formed in such a manner as to have a section in which a radius is linearly increased, and consequently, the unit rotational angle of the rotary member on the rotational center axis is proportional to the unit movement amount of the cutting insert.