A cutting insert having a first coupling structure, a tool holder having a complementary second coupling structure with a seat for a milling tool system, and a milling tool system having a cutting insert and a holder are all described. The first coupling structure has a circular cylindrical element with a cylinder abutment surface, the circular cylindrical element projecting axially from a bottom surface of a central body and being arranged concentrically with respect to a central axis, A perpendicular abutment surface is arranged perpendicular to the central axis, and at least two ribs project axially from the bottom surface. Each rib has a contact area with a normal direction at least essentially perpendicular to the central axis for opposing a torque about the central axis.

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 first lateral surface of a cutting insert includes a first region, a second region, and a third region. The first region includes a first upper region inclined outward, and a first lower region that is parallel to a central axis. The second region includes a second upper region inclined inward, and a second lower region that is parallel to the central axis. The third region includes a third upper region inclined outward, a third lower region, and a concave part. The third lower region is located more outside than the third upper region and is parallel to the central axis. The concave part is located between the third upper region and the third lower region.

A first main trajectory represents a trajectory of a first main cutting edge obtained by revolving and projecting the first main cutting edge onto a plane including a central axis. A second main trajectory represents a trajectory of the second main cutting edge obtained by revolving and projecting the second main cutting edge onto the plane. The first main trajectory intersects the second main trajectory. A tangent to the first main trajectory at an intersection between the first main trajectory and the second main trajectory is inclined to be closer to the central axis in a direction from the first surface toward the second surface. A tangent to the second main trajectory at the intersection is inclined to be closer to the central axis in a direction from the second surface toward the first surface.

A rotary cutting tool includes a cutter body having a plurality of insert-receiving pockets. Each pocket includes a bottom support surface, an axial support surface, a radial support surface, a top clearance surface and an intermediate clearance surface extending between the axial support surface and the top clearance surface. A cutting insert includes a helical top surface, a helical side surface, a side surface opposite the helical side surface, a pair of opposed side walls, a bottom surface, and a cutting edge formed at an intersection between the helical top surface and the helical side surface. The cutting insert further includes an undercut for accommodating the axial support surface, the top clearance surface and the intermediate clearance surface of the pocket when the cutting insert is mounted in the pocket.

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 center 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 cutting insert for a tool for machining a workpiece, wherein the cutting insert has a 180 rotational symmetry about a bore axis extending perpendicularly and centrally through two opposing, identical base surfaces of the cutting insert, and has two identical parts which are connected along a center plane, wherein said center plane extends orthogonally to the bore axis and has the same distance from each of the two base surfaces, wherein each part has two identical mutually opposite main sides and two identical mutually opposite secondary sides, wherein each main side has a rectilinear main cutting edge extending parallel to the center plane, and each secondary side has a planar bearing surface extending orthogonally to the center plane, wherein the two main cutting edges of each part extend parallel to one another and transversely to the two main cutting edges of the respective other part, and wherein the two main cutting edges of each part extend parallel to the two bearing surfaces of the respective other part, wherein each main cutting edge transitions at its respective first end into a first segmental cutting edge which is arranged on a first protrusion provided on an adjacent secondary side of the respective part, and wherein each main cutting edge transitions into a second segmental cutting edge at its respective second end, opposite the first end, which is arranged on a second protrusion provided on the respective other adjacent secondary side of the respective part, wherein the first and the second protrusions each adjoin the bearing surface arranged on the respective same secondary side and project with respect to the respective bearing surface.

The present invention discloses a vertically-mounted milling cutter insert and a multitooth milling cutter, wherein the vertically-mounted milling cutter insert comprises a insert base and a cutter tip unit, the insert base is set with a mounting hole for mounting the vertically-mounted milling cutter insert onto the milling cutter wheel, and the cutter tip unit is mounted on the insert base, and the cutter tip unit has a double-cutter tip structure. In the invention, the vertically-mounted milling cutter insert is positioned via the fitting between a bent-plane structure in the vertically-mounted milling cutter insert and a positioning structure in the milling cutter wheel, and the bent-plane structure will not be abraded in use. Because the bent-plane structure will not be abraded, reliable positioning may be guaranteed when two cutter tips are used.

A cutting insert and a cutting tool having same are provided. The cutting insert includes an upper surface, a lower surface having a flat surface, side surfaces connecting to each of the upper surface and the lower surface, and cutting edges being formed by the upper surface and the side surfaces. A first cutting edge among the cutting edges is inclined downward. A major side surface among the side surfaces comprises a first major side surface connected to the upper surface so as to constitute the first cutting edge, and a second major side surface connected to the first major side surface and the lower surface. The first major side surface has a reversely positive surface, and the second major side surface has a reversely positive surface or a negative surface, and a minor side surface among the side surfaces has a positive surface or a negative surface.

A double-sided tangential cutting insert, having eight different working positions, includes two opposite end faces serving as leading and trailing faces of the cutting insert, two opposite major side faces, two opposite minor side faces, a through hole extending between the two major side faces, cutting edges distributed along a periphery of each end face, and four abutment surfaces arranged on each end face in a grid-like pattern with two first arrays, each of which have two consecutive abutment surfaces that extend between the two major side faces, and two second arrays, each of which have two consecutive abutment surfaces and extend between the two minor side faces. Each abutment surface are inclined inwards in the cutting insert such that each two consecutive abutment surfaces in each array are inclined towards each other.