The invention relates to a method for producing a roughing tool (1), particularly a circular milling tool, comprising the following steps: fitting a lateral surface of a tool base body (10) that can be rotatably driven about an axis of rotation (2) with a number of cutting element blanks (20′) that are staggered in the axial and/or peripheral direction, such that a free edge of each cutting element blank (20′) protrudes out of the lateral surface in the mounted state; inserting a microtoothing comprising a plurality of axially spaced cutting teeth (21) into the respective free edges of the cutting element blanks (20′) by a material removal method, preferably by thermal machining, particularly preferably by eroding, in the premounted state on the tool base body (10). The invention further relates to a roughing tool produced by means of such a method.

A tapered end mill includes an outer circumferential cutting edge, a flute is disposed such that a flute bottom radius defined as a distance between a flute bottom and the tool axis decreases from a shank side toward the tool tip side, the flute bottom radius linearly changes at a predetermined gradient angle in the tool axis direction, the gradient angle changes at a predetermined change point to become smaller on the tool tip side as compared to the shank side, and a gradient angle θ1 on the tool tip side relative to the change point is equal to or larger than 0° and smaller than a taper half angle α of a cutting portion provided with the outer circumferential cutting edge, and a gradient angle θ2 on the shank side relative to the change point is larger than the taper half angle α.

An end mill includes end cutting edges located at a front end side of a cutting edge portion of a body including rotation axis, peripheral cutting edges, and helically extending flutes. Each of the peripheral cutting edges and the flutes are alternately located from the front end side to a rear end side, and a first distance between a deepest position of the flute and the rotation axis is equal among the respective flutes in a cross section taken along the rotation axis. The flute includes a first region located at a side of the peripheral cutting edge and includes the deepest position, a second region located at a side of a heel, and a boundary. A second distance from the rotation axis to the boundary located at the rear end side is larger than the second distance located at the front end side.

The present invention concerns a pressed cutting tool comprising a variable core diameter, a mold and a method for producing the cutting tool by pressing. Said cutting tool preferably comprises a shaft and a part comprising one or more helical flutes, wherein low points or lines in said flutes define the shape of said core. In a preferred embodiment, said core is conical. In a preferred embodiment, said cutting tool is an end mill and/or a drill.

Novel endmills are provided. Such endmills have a body with outside diameter (OD), and outer surface, and a longitudinal axis, a plurality of flutes, helical in some embodiments. Flutes include a narrow leading edge land portion with circular segment profile and having flute cutting edge portions along a substantially uniform circumferential location, with an eccentric relief margin rotationally rearward of the narrow leading edge land portions. Face portions are provided with face cutting edge portions, and with a first dish portion adjacent each of the cutting edge portions sloping inwardly and downwardly generally toward a central longitudinal axis at a first dish angle alpha (α). Corner blend portions extend from flute cutting edge portions to the face cutting edge portions. Corner blend portions are provided in a variety of profiles, including an embodiment wherein the profile of the corner blend portions are truncated before the segment of curvature becomes tangential to the face cutting edge portions. In various embodiments, one or more coolant passageways are provided, and in an embodiment, an exit port for coolant is provided at the center of rotation of the end face portion.

A rotary tool according to a non-limiting aspect includes a body having a rotation axis and extending from a first end to a second end. The body including: a first part including the first end; a second part located closer to a second end than the first part and having a larger outside diameter than the first part; a cutting edge located at a side of the first end; a ridge portion located in the first part and the second part, connected to the cutting edge and helically extending from the cutting edge toward the second end; and a flute located along the ridge portion. The flute includes: a first flute located at the first part and having a first helix angle; and a second flute located at the second part and having a second helix angle. The second helix angle is smaller than the first helix angle.

A milling tool having an operating area that is rotatable about an operating axis of rotation for milling a workpiece. The operating area has at least one milling edge extending transversely to the circumferential direction (U) of an operating axis of rotation. At least one of the at least one milling edge includes at least one milling edge portion in which a milling edge profile (P), which is defined by the radial distance (F) between the milling edge and the operating axis of rotation along the milling edge, has a non linear progression. The milling edge in the milling edge portion has a chip space, which extends radially inward toward the operating axis of rotation in relation to the milling edge. The chip space has a chip space base that follows the milling edge profile (P) at least in portions in the milling edge portion with the non-linear milling edge profile (P).

A tapered end mill includes an outer circumferential cutting edge, a flute is disposed such that a flute bottom radius defined as a distance between a flute bottom and the tool axis decreases from a shank side toward the tool tip side, the flute bottom radius linearly changes at a predetermined gradient angle in the tool axis direction, the gradient angle changes at a predetermined change point to become smaller on the tool tip side as compared to the shank side, and a gradient angle θ1 on the tool tip side relative to the change point is equal to or larger than 0° and smaller than a taper half angle α of a cutting portion provided with the outer circumferential cutting edge, and a gradient angle θ2 on the shank side relative to the change point is larger than the taper half angle α.

A milling tool, preferably a fir tree cutter, having an operating area which is rotatable about an operating axis of rotation for milling a workpiece and comprises a milling edge which extends transversely to the circumferential direction (U) of an operating axis of rotation, wherein the at least one milling edge includes at least one milling edge portion in which a milling edge profile (P), which is defined by the radial distance (F) between the milling edge and the operating axis of rotation along the milling edge, comprises a non-linear progression, wherein the milling edge in the milling edge portion comprises a chip space, which extends radially inward toward the operating axis of rotation in relation to the milling edge and comprises a chip space base which follows the milling edge profile (P) at least in portions in the milling edge portion with the non-linear milling edge profile (P).

A cutting tool may have a columnar shape extended along a rotation axis from a first end toward a second end, and may include a holder, a first insert and a second insert. The holder may include a first pocket, a second pocket, a first flute and a second flute. The second pocket may be located closer to the second end than the first pocket. The first flute may be extended along the first pocket. The second flute may be extended along the second pocket. A first length from the rotation axis to the first flute may be smaller than a second length from the rotation axis to the second flute. An opening width of the first flute may be smaller than an opening width of the second flute.