Abstract: This tool holder includes: a pocket portion, which is provided in a tip end portion of the tool holder and is provided with a mounting seat; and a columnar portion, which is provided on a rear end side from the pocket portion. When a virtual cylindrical surface, which includes a cylindrical surface constituting a side surface of the columnar portion, is defined in the columnar portion, a first cylindrical surface, which is closest to the pocket portion, and a second cylindrical surface, which is farthest from the first cylindrical surface, are disposed on the virtual cylindrical surface. A recess, which is recessed radially inward from the virtual cylindrical surface, is disposed between the first cylindrical surface and the second cylindrical surface.

Abstract: In this cutting insert, two cutting edges respectively including arc-shaped cutting edge parts extending in an arc shape in a plan view and linear cutting edge parts are provided in an intersection ridge line part between a rake face and a flank face. The cutting edges include a convex curved part moving away from a seating face and then moving close to the seating face as at least the arc-shaped cutting edge part moves away from the linear cutting edge parts. In a side view, the arc-shaped cutting edge parts include curvature change points between most protruding points farthest from the seating face and cutting edge tips of the arc-shaped cutting edge parts.

Abstract: A coated cutting tool includes a substrate and a hard coating film. The hard coating film includes a b layer which is disposed on the substrate, a c layer which is a multilayer coating film laminated on the b layer and in which a c1 layer of a nitride or a carbonitride containing Al and Cr and a c2 layer of a nitride or a carbonitride containing Ti and Si are alternately laminated with a film thickness of 50 nm or less, respectively, and a d layer which is disposed on the c layer and is a nitride or a carbonitride of TiSi. The c layer contains 0.10 atomic % or less of Ar with respect to a total amount of a metal (including metalloid) element and a non-metal element.

Abstract: A coated tool includes a hard coating on a substrate. The hard coating is a nitride or a carbonitride containing 70 atom % or more and 90 atom % or less of Al and 10 atom % or more and 30 atom % or less of Cr with respect to a total amount of metal elements including metalloid elements, and containing 0.50 atom % or less of argon (Ar) with respect to a total amount of the metal elements including metalloid elements and non-metal elements. The hard coating has a crystal structure consisting of cubic crystals and hexagonal crystals. In the hard coating, in an X-ray intensity distribution on an a-axis in a positive pole figure of (111) planes of the cubic crystals, where a maximum intensity is denoted by IA and a minimum intensity is denoted by IB in an ? angle range of 10° to 90°, IB is IA×0.5 or more.

Abstract: A rake surface of a cutting insert according to the present disclosure is formed with a first plane parallel to a seating surface. An outer periphery of the first plane includes a plurality of curved portions having different radii of curvature. On the rake surface, a breaker is provided between a cutting edge portion and the first plane around an entire circumference of the cutting insert. When a distance from the seating surface to a tip of the cutting edge portion in a thickness direction is denoted by L11, a distance from the seating surface to the first plane in the thickness direction is denoted by L12, and a distance from the seating surface to a deepest portion of the breaker in the thickness direction is denoted by L13, a relationship of L11>L12>L13 is satisfied over an entire circumference of the cutting edge portion.

Abstract: A coated cutting tool includes a lower layer, a middle layer, and an upper layer. The lower layer comprises a composition AlaCrbML1-a-bN (ML is at least one element selected from the group consisting of Ti, Zr, Hf, V, Nb, Ta, Mo, and W, 0.60?a?0.70, and 0.30?b?0.40). The middle layer comprises first sublayers and second sublayers alternately deposited. The first sublayers each comprises a composition AlcTidM11-c-dN (M1 is at least one element selected from the group consisting of Zr, Hf, V, Nb, Ta, Mo, and W, 0.50?c?0.55, and 0.45?d?0.50). The second sublayers each comprises a composition AlcCrfM21-e-fN (M2 is at least one element selected from the group of Ti, Zr, Hf, V, Nb, Ta, Mo, and W, 0.60?e?0.70, and 0.30?f?0.40). The upper layer comprises a composition AlgCrhMU1-g-hN (MU is at least one selected from the group consisting of Ti, Zr, Hf, V, Nb, Ta, Mo, and W, 0.60?g?0.70, and 0.30?h?0.40).

Abstract: A cutting insert having a polygonal plate shape includes a rake face, a seating surface, a side surface, and a mounting hole that is open to the rake face and the seating surface and that penetrates the cutting insert in a thickness direction, in which a cutting edge portion is provided on an intersecting ridgeline between the rake face and the side surface, the cutting edge portion includes a corner edge and a main cutting edge connected to the corner edge, the main cutting edge is linear in both of a plan view, the corner edge includes a first arc edge connected to the main cutting edge and an outermost peripheral arc edge located at an outermost peripheral portion in the corner edge, and the first arc edge and the outermost peripheral arc edge are arc-shaped cutting edges having different radii of curvature.

Abstract: An end mill includes: an end mill body configured to be rotatable around an axis; a chip discharge groove configured to extend from a tip in an axial direction of the end mill body toward a rear end side in the axial direction while twisting around the axis; and outer peripheral cutting edges each being configured to be formed at an intersection ridge portion on a forward side in a rotation direction between the chip discharge groove and an outer peripheral flank face. At least one outer peripheral cutting edge includes a plurality of notch portions that discontinue the outer peripheral cutting edge. Circumferential positions of all the notch portions in the end mill body do not overlap each other.

Abstract: A coated tool of the present invention includes a base material and a hard coating film on the base material. The hard coating film is a nitride or carbonitride containing aluminum (Al) of 65 atomic % or more 90 atomic % or less, titanium (Ti) of 10 atomic % or more 35 atomic % or less, a total of aluminum (Al) and titanium (Ti) of 85 atomic % or more, and argon (Ar) of 0.20 atomic % or less. The hard coating film satisfies a relationship of Ih×100/Is?12 when a peak intensity of a (010) plane of AlN of a hexagonal close-packed structure is Ih and a sum of peak intensities due to predetermined nine crystal planes of TiN and AlN is Is in an intensity profile obtained from a selected area diffraction pattern of a transmission electron microscope.

Abstract: An end mill includes: at a distal end portion side in a rotation axis direction of a tool body, a plurality of cutting edges continuous from a center side to an outer peripheral side in a radial direction and adjacently arranged in a rotation direction of the tool body; gashes formed on front sides in a rotation direction of the respective cutting edges; and chip discharge flutes continuous with the gashes. The gashes are composed of distal end side depressed faces formed along a distal end side axis making an acute angle with the rotation axis and rear side depressed faces formed along a rear side axis making a smaller acute angle with the rotation axis than the distal end side axis. The distal end side depressed faces and the rear side depressed faces are formed to have shapes overlapping with one another.

Abstract: A coated member of the present invention includes a substrate and a hard coating film that is formed on the surface of the substrate and includes a nitride or carbonitride of a metal element. A content of Al is 65 atom % or more and 85 atom % or less, a content of Cr is 15 atom % or more and 35 atom % or less, and a total content of Al and Cr is 90 atom % or more and 100 atom % or less in a total amount of the metal element and metalloid element contained in the hard coating film, and in an intensity profile obtained from a selected area diffraction pattern of a transmission electron microscope, a crystal plane exhibiting a maximum peak intensity is different between a vicinity of the substrate and a vicinity of the surface, in the vicinity of the substrate, a peak corresponding to a (111) plane or a (200) plane of a face-centered cubic lattice structure exhibits a maximum intensity, and in the vicinity of the surface, a peak intensity corresponding to a (220) plane is 0.

Abstract: An end mill includes a cutting edge portion, a shank, a bottom cutting edge located on a tip surface of the cutting edge portion, and a peripheral cutting edge located on an outer peripheral surface of the cutting edge portion, the bottom cutting edge has a bottom cutting edge outer peripheral portion that extends from an outer peripheral end of the bottom cutting edge to the shank side at an inclination angle of 3° or less, a flank angle of a bottom cutting edge outer peripheral portion primary flank face adjacent to the bottom cutting edge outer peripheral portion is larger than a flank angle of a peripheral cutting edge primary flank face adjacent to the peripheral cutting edge, and a width of the bottom cutting edge outer peripheral portion primary flank face is larger than a width of the peripheral cutting edge primary flank face.

Abstract: A coated tool of the present invention includes a base material; and a hard coating film on the base material. The hard coating film is a nitride or carbonitride which contains aluminum (Al) of 65 atomic % or more and 90 atomic % or less and titanium (Ti) of 10 atomic % or more and 35 atomic % or less with respect to a total amount of metal (including metalloid) elements, and have a face-centered cubic structure. In the X-ray intensity distribution of the ? axis of the positive pole figure with respect to the (111) plane of the face-centered cubic structure, the hard coating film have a maximum intensity Ia in the ? angle range of 80° to 90° and an intensity in the ? angle range of 0° to 70° is 30% or less of the Ia.

Abstract: A coated tool of the present invention includes a substrate and a hard coating on the substrate. The hard coating is a nitride or a carbonitride containing 65 atom % or more and 90 atom % or less of Al and 10 atom % or more and 35 atom % or less of Cr with respect to a total amount of metal elements including metalloid elements, and containing 0.50 atom % or less of argon (Ar), and has a face-centered cubic lattice structure. The hard coating shows a maximum intensity Ia in an ? angle range of 80° to 90° in an X-ray intensity distribution on an ?-axis in a positive pole figure of a (111) plane of the face-centered cubic lattice structure, and an intensity in an ? angle range of 0° to 70° is 35% or less of the maximum intensity Ia.

Abstract: A coated cutting tool which has, on a surface of a substrate, a layer A of a face-centered cubic lattice structure which is a nitride or carbonitride containing 50 atom % or more of Al, 20 atom % or more of Cr, 85 atom % or more of Al and Cr, and 4 atom % or more and 15 atom % or less of Si, and a layer B provided on the layer A. The layer B is a nitride or carbon nitride which contains 70 atom % or more and 90 atom % or less of Ti, 5 atom % or more and 20 atom % or less of Si, and 1 atom % or more and 10 atom % or less of Nb or Cr in terms of a total amount of metal (including metalloid) elements, and has the face-centered cubic lattice structure.

Abstract: A cutting insert includes a rake face, a seating surface facing the rake face, a flank face connecting the rake face and the seating surface, and a cutting edge formed in an ridgeline between the rake face and the flank face. The cutting edge includes a linear main cutting edge, a corner edge, and a wiper edge. A recess portion is provided in an end portion of the main cutting edge. The wiper edge is in an arc shape and connected to the corner edge. Viewed from a rake face side, an extension line of the main cutting edge being L1, a tangent line of the wiper edge perpendicular to L1 being L2, and a tangent line of the wiper edge passing through the point P being L3, an angle ? between L2 and L3 is 0.010°???3.0°.

Abstract: A coated cutting tool includes a substrate and a hard film that is formed thereon. The hard film is a nitride in which with respect to a total amount of metal elements (including metalloid), Al is 60 at % or more and 70 at % or less, Ti is 20 at % or more and 40 at % or less, and one or more selected from W, Cr, Ta, Nb, Zr, Mo, and V are 1 at % or more and 10 at % or less, and with respect to a total amount of metal elements (including metalloid), a nitrogen element, and an Ar element, Ar is contained in an amount of 0.01 at % or more and 0.15 at % or less. A crystal structure of the hard film is a face-centered cubic lattice structure, and a half-value width of an X-ray diffraction peak of a (111) plane is 0.75° or more and 0.95° or less.

Abstract: A coated member of the present invention includes a substrate and a hard coating film that is formed on the surface of the substrate and includes a nitride or carbonitride of a metal element. A content of Al is 65 atom % or more and 85 atom % or less, a content of Cr is 15 atom % or more and 35 atom % or less, and a total content of Al and Cr is 90 atom % or more and 100 atom % or less in a total amount of the metal element and metalloid element contained in the hard coating film, and in an intensity profile obtained from a selected area diffraction pattern of a transmission electron microscope, a crystal plane exhibiting a maximum peak intensity is different between a vicinity of the substrate and a vicinity of the surface, in the vicinity of the substrate, a peak corresponding to a (111) plane or a (200) plane of a face-centered cubic lattice structure exhibits a maximum intensity, and in the vicinity of the surface, a peak intensity corresponding to a (220) plane is 0.

Abstract: A two-flute ball end mill includes a cutting edge that is formed at an intersection ridge line between a groove wall surface of a gash groove and a flank surface; and the flank surface includes a first flank surface that forms a chisel edge and a second flank surface that extends from the first flank surface to a rear side in a rotation direction with a larger clearance angle. In a case where, as seen from a tip side in an axial direction, an intersection point between one cutting edge of two cutting edges and the chisel edge is defined as a first intersection point, and an intersection point between a flank surface boundary line between the first flank surface and the second flank surface of the other cutting edge of the cutting edges and the groove wall surface is defined as a second intersection point.

Abstract: Provided is a coated cutting tool, which includes a hard coating film containing a layer (b) formed of a nitride or a carbonitride, a layer (c) which is a layered coating film formed by alternately layering a nitride or carbonitride layer (c1) that contains 55 atom % or more and 75 atom % or less of Al, Cr having a second highest content percentage, and at least Si and a nitride or carbonitride layer (c2) that contains 55 atom % or more and 75 atom % or less of Al and Ti having a second highest content, and a layer (d) that is a nitride or carbonitride that contains, with respect to a total amount of metal elements (including metalloid elements), 55 atom % or more and 75 atom % or less of Al and Ti having a second highest content percentage, the content percentage of Ti being 20 atom % or more.