A cutting insert may include a first surface, a second surface and a lateral surface. The first surface may have a polygonal shape and may include a first corner, a second corner, a third corner, a first side and a second side. The lateral surface may include a first lateral surface and a second lateral surface. At least a part of the first lateral surface may be located between the first side and the second surface. At least a part of the second lateral surface may be located between the second side and the second surface. The first lateral surface may be located further outside than the first side in a front view of the first surface. The first lateral surface may include a first region located closer to the second lateral surface as coming closer to the second surface.

A cutting tool of an aspect is provided with a holder and a cutting insert attached to an insert pocket of the holder. The cutting insert includes a front end surface, a rear end surface, a front side surface, a rear side surface, an outer side surface, and an inner side surface. The cutting edge is disposed along a ridge line at an intersection between the front side surface and the front end surface, and a ridge line at an intersection between the front side surface and the outer side surface. The insert pocket includes a restraining surface that is in contact with the rear side surface, in a front end view, the restraining surface includes a projecting portion having a curved line shape projecting toward the front in the rotational direction, and the rear side surface includes a recessed portion that is in contact with the projecting portion.

An indexable milling cutting insert includes an opposed outside and inside, a periphery, and a plurality of homologous and alternately individually usable cutting edges, which are equidistantly spaced apart from a centre axis, which extends between the outside and inside. The cutting insert includes a plurality of countersunk chip channels, which are delimited by bottoms and tangentially spaced-apart ridges, which individually include a cutting edge formed between a chip surface included in a first chip channel, and a clearance surface, which borders on a second chip channel.

A milling tool includes a body which is rotatable about a first axis. At least one cutting tooth mounted on the body having a cutting edge for cutting about the first axis. A wiper tooth extends from the mill body. The wiper tooth includes at least at a portion having a peripheral surface about the second axis and the peripheral surface intersects a face surface defining a cutting edge that is round about the second axis for cutting about the first axis. In some embodiments, the peripheral surface, the face surface and the cutting edge are formed on an insert that is mounted the mill body.

A double-sided tangential cutting insert, as well as a tool holder system that carries a plurality of the double-sided tangential cutting inserts, that has a peripheral side shape, as viewed from one of said cutting rake faces, that includes a pair of generally identical opposing main cutting edges wherein each of the main cutting edge comprises a substantially straight main cutting edge portion and an adjoining convex main cutting edge portion. The convex main cutting edge portion is truncated by an adjacent convex minor side face so as to define a generally sharp edge and a point of truncation. The peripheral side shape further includes a pair of opposing full nose cutting edges with a nose cutting radius; and a pair of opposing convex minor cutting edges with a minor cutting edge radius. The minor cutting edge radius is at least about four times greater than the nose cutting radius.

A milling tool includes a main body and a plurality of cutting inserts with respective cutting edges. The main body has an end face and a barrel-shaped curved lateral face. A first group of the plurality of cutting inserts are fastened on the end face, a second group of the plurality of cutting inserts are fastened on the barrel-shaped curved lateral face, and the respective cutting edges describe a barrel shape. Each one of the plurality of cutting inserts may be designed as an indexable insert.

A face milling cutter includes a tool body provided with several primary cutting inserts including a pattern forming insert with a pattern forming cutting edge for forming a grooved pattern in a milled flat surface formed on a workpiece by the primary cutting inserts, and a calibrating insert with a calibrating cutting edge for cutting summits in the grooved pattern. The pattern forming cutting edge is wave-shaped as seen from a direction facing a rake face of the pattern forming insert with a periodic wave shape having a plurality of wave crests and intermediate wave troughs. The calibrating cutting edge is located axially between the wave crests and wave troughs of the pattern forming cutting edge, as seen in a direction from the rear end of the tool body towards the front end of the tool body in parallel with the longitudinal axis of the tool body.

A cutting tool includes a main body. The main body includes a distal end surface, a rear end surface, and a side surface. A spiral first groove and a spiral second groove are formed on the side surface of the main body. The first groove has at least four installation surfaces. The first installation surface is located on a most rear end surface side. The second installation surface is located closer to a distal end surface side with respect to the first installation surface. A length from the first installation surface to the second groove in a circumferential direction along the rotation direction of the main body is set to a first length. A length from the second installation surface to the second groove in the circumferential direction is set to a second length. The first length is longer than the second length.