A milling head for a ball track milling cutter includes an imaginary center axis, a first, working-side end and a second, clamping-side end opposite the first end when viewed along the central axis, and comprising at least one geometrically defined cutting edge, extending along a cutting edge profile of the cutting edge from a first cutting edge end facing the first end of the milling head in the direction of the second end of the milling head up to a second cutting edge end facing the second end of the milling head, wherein at least one cutting edge is formed as an intersecting line between the rake face associated with at least one cutting edge and a first flank face associated with at least one cutting edge, wherein at least one cutting edge is assigned a negative rake angle, a first clearance angle and a wedge angle. It is provided that a value of the negative rake angle in the region of the first cutting edge end has a different value than in the region of the second cutting edge end, that the first clearance angle in the region of the first cutting edge end has a different value than in the region of the second cutting edge end, and that the wedge angle along the cutting edge profile is constant.

A one or multiple cutting edge machining tool, in particular milling, reaming or drilling tool, includes a tool body (12), which extends along a central tool axis and which has at least one cutting web (20), which carries a cutting insert (22), which protrudes radially beyond a circumferential jacket surface (21) of the cutting web (20) and which cuts at least circumferentially, and an integrated coolant channel system, which has a main channel (28) guided along the tool axis (11) and, for each cutting web (20), at least one branch channel (29, 29a, 29b), which branches off the main channel (28) and which is guided through the cutting web (20). The at least one branch channel (29, 29a, 29b), which is guided exclusively through the cutting web (20), has a mouth opening (30, 30a, 30b), which lies in the jacket surface (21) of the cutting web (20).

A milling method includes moving a milling tool having at least two axially spaced apart sets of cutting inserts to an axial position within a bore in a material and rotating the milling tool about a longitudinal axis. The method further includes initiating contact between the milling tool and a wall of the bore in a region of the wall having a least amount of material at the axial position. The method further includes moving the milling tool around a perimeter of the bore.

Broadly contemplated herein, in accordance with at least one embodiment, is a multi-flute end mill configuration that maintains circumferential spacing between the rake surface and clearance surface adjoining two adjacent end face cutting edges, respectively, regardless of the number of flutes and the desired end face configuration.

Milling tools and methods are disclosed. The method may include moving a milling tool having at least two axially spaced apart sets of cutting inserts to an axial position within a bore in a material and rotating the milling tool about a longitudinal axis. Contact between the milling tool and a wall of the bore may be initiated in a region of the wall having a least amount of material at the axial position. The milling tool may include a tool shaft having a longitudinal axis, a first set of radially spaced cutting inserts coupled to the tool shaft, and a directly adjacent second set of radially spaced cutting inserts coupled to the tool shaft and spaced from the first set of cutting inserts along the longitudinal axis. The first and second sets of cutting inserts may be staggered from each other by at least 10 degrees.

A cutting tool according to an aspect of the present disclosure includes a shank, a joint, and a cutting portion attached through the joint to the shank. The cutting portion includes a core and a surface portion. The surface portion is disposed around a central axis of the cutting portion to cover an outer circumferential surface of the core. The surface portion includes a cutting edge. The cutting edge is disposed on an outer circumferential surface of the surface portion and formed in a helical shape about the central axis. The surface portion is a composite sintered material including a hard phase formed of a plurality of diamond particles and a plurality of cubic boron nitride particles, and a binder phase forming the remainder.

Radius mill and cutting work method that includes a plurality of end cutting edges arrayed around a central axis O and a plurality of arc-shaped radius end cutting edges continuous with the end cutting edges on an outer peripheral side in a radial direction. The end cutting edge is divided into an inner peripheral side end cutting edge and an outer peripheral side end cutting edge in a radial direction. Second surfaces of the plurality of inner peripheral side end cutting edges are coupled at a part close to the axis O. A region of coupled second surfaces is continuous from a region including the axis O to outer peripheral sides of respective inner peripheral side end cutting edges in a radial direction in a strip shape. A width of the strip-shaped region gradually enlarges from axis O side to an outer peripheral side in a radial direction.

A cutting tool rotates about a rotation axis, and includes a tip end portion. The tip end portion includes a partially spherical surface that is brought into contact with a workpiece. The surface is provided with a plurality of recesses disposed apart from each other. An opening edge of each of the plurality of recesses constitutes a cutting edge.

A cutting tool includes a portion made of a high hardness material. The portion includes a rake face, a flank face, and a cutting edge. The rake face is divided into a region A along the cutting edge and a region B excluding the region A of the rake face, a surface roughness of the region A is smaller than a surface roughness of the region B, and the region B is deepened with respect to a position of the region A.