Milling inserts having surfaces designed for supporting the insert relative to a milling cutter body, and a milling tool are provided. The milling insert has a first end surface, a second end surface, and a side surface extending between the first end surface and the second end surface At least one cutting edge is defined by an intersection of at least one of the first end surface and the second end surface with the side surface. The at least one cutting edge includes a radiused component having a first end and a second end and first and second components at the first and the second ends of the radiused component, respectively. The first and second components are less curved than the radiused component. The side surface has at least one substantially V-shaped valley formed by first and second support surfaces.

A reaming tool includes a tool holder body and at least one one-piece indexable reaming insert. The reaming insert includes more than one cutting edge. The tool holder body has an insert clamp for clamping the reaming insert relative to the tool holder body. The cutting edge extends beyond a periphery of the tool holder body when the reaming insert is clamped relative to an abutment surface of the tool holder body. The reaming insert has a head and an integral mounting portion, the tool holder body having an opening in which the integral mounting portion of the cutting insert is disposed. A reaming insert for a tool is also disclosed.

A cutting insert has top and bottom surfaces opposing each other and a side surface connecting them. A part of an intersecting ridge between the top and side surfaces functions as a cutting edge. On the side surface, a side surface portion adjacent to the intersecting ridge portion opposing the cutting edge intersects the top surface at an acute angle. At least on a part of a bottom surface, an inclined surface gradually approaching the top surface with increasing distance from a side surface portion on a side opposite to a cutting edge is formed. This allows a part of the cutting resistance to act on the side surface portion. As a result, friction resistance between the side surface portion and the side surface of an insert seat becomes larger, thereby suppressing a shifting of the cutting insert when cutting.

A double-sided, indexable cutting insert for a milling cutter includes a first surface, a second surface, and side surfaces. Cutting edges are defined at an intersection between the first and second surfaces and side surfaces. Each cutting edge includes a first cutting-edge portion, a second cutting-edge portion and a third cutting-edge portion. The first and second surfaces include diagonally opposite recessed regions. The cutting insert is mounted in a milling cutter defining a radial rake angle, A, and a ramping angle, B, with respect to a central, rotational axis of the milling cutter that provide superior performance for both milling and ramping cutting operations.

A milling tool has a basic body rotatable about a center axis, and including an outside, which includes a pair of opposite front and back sides, as well as a peripheral envelope surface. The body is equipped with a plurality of replaceable cutting inserts. The basic body includes an inner hollow space having an internal limiting surface, in which there collectively mouth a plurality of bores. The bores also mouth in the outside. Each cutting insert is mounted on an outer end of an ejector, which is rectilinearly movable in the individual bore and has an inner end accessible from the hollow space, and which interacts with a compressible force generator, to pull the same into the bore. By mounting the cutting inserts on ejectors, which simultaneously are accessible from a common hollow space, the cutting inserts can be replaced fast and easily, and possibly also be indexed.

A high-feed milling tool assembly includes a tool and a ramping insert. The ramping insert includes ramping, feed and side sub-edges. The ramping and feed sub-edges are longer than the side sub-edges and converge with increasing proximity to the side sub-edge to which they are both connected.

A cutting insert including a first end surface, a second end surface and a peripheral side surface extending therebetween. The first and second end surfaces each having one substantially quadrangular portion and two substantially semicircular portions which are respectively joined to two opposing sides of the substantially quadrangular portion. An intersecting edge between each of the first and second end surfaces and the peripheral side surface is provided with a cutting edge. The cutting edge is formed in at least part of the substantially semicircular portion. At least part of a portion of the peripheral side surface which is adjacent to the substantially quadrangular portion of each of the first and second end surfaces, and at least part of a portion of the peripheral side surface which is adjacent to the substantially semicircular portion, each have a function of coming into contact with an insert seat.

A tool for a chip removing machining includes a basic body and a replaceable cutting insert, which is indexable by a cutting edge exchange mechanism. The cutting edge mechanism includes an ejector, which in a front part has an attachment for the cutting insert and interacts with a device for transforming a rectilinear, axial projection of the ejector into a simultaneous turning of the same. The cutting edge exchange mechanism includes a stop collar, which is fixedly anchored in relation to the basic body, and through which the ejector is movable back and forth and a carrier included in a rear part of the ejector. In addition, between the carrier and the stop collar, there is arranged a mechanical compression spring, which spaces the carrier from the stop collar. In addition, an autonomous cutting edge exchange mechanism is disclosed.

A cutting insert has a first (top) end surface, a second (bottom) end surface, a peripheral side surface connecting the top and bottom end surfaces, and a mounting hole having a central axis O which penetrates the top and bottom end surfaces. Cutting edges are formed on an intersecting edge between the first end surface and the peripheral side surface. The second end surface has an inclined part. When a virtual plane substantially perpendicular to the axis O and passing through any point of the cutting edges is defined, the inclined part is inclined so as to be more distant from the virtual plane, heading from the peripheral side surface to the axis O. A projected part projected in a direction along the axis O is formed in an area around the mounting hole in the inclined part. This reinforces the strength of the mounting hole.

A cutting insert mountable in an insert pocket of a milling cutter and capable of effectively absorbing a radially outward force during high speed machining and high ramp machining. The cutting insert has a top surface, a bottom surface, peripheral surfaces extending between the top and bottom surfaces, a mounting hole extending through the top surface and the bottom surface, a protrusion portion protruding from the bottom surface, and a pair of lower inclined abutment surfaces formed at opposite edges of the bottom surface. The lower inclined abutment surfaces are inclined in opposite directions toward a pair of opposing peripheral surfaces, outwardly and upwardly relative to the protrusion portion. The protrusion portion extends across the mounting hole and has a lateral surface facing radially outwardly of the milling cutter. The lateral surface selectively contacts or does not contact the insert pocket depending on a revolution speed of the milling cutter.