A throwaway insert includes a base and a cutting edge member. The cutting edge member includes: a rake face; a flank face extending to cross the rake face; a first connecting face connecting the flank face to a side surface of the base and extending to cross the rake face; and a first ridgeline formed by the rake face and the flank face and serving as a cutting edge. When viewed in a plan view from the upper surface of the base, the flank face and the first connecting face are located external to the base. A second ridgeline formed by the rake face and the first connecting face crosses the first ridgeline at an obtuse angle.

A highly wear-resistant chisel tip body comprising a material that includes diamond particles or monocrystalline diamond structures, in particular a PCD, CVD or NPD material, with a cutting top and a mounting bottom opposite said cutting top, via which the chisel tip body is attachable to a support body. The invention further relates to a milling chisel, a milling drum, as well as a ground milling machine having such a chisel tip body.

An insert based on an aspect includes a first face, a second face located opposite to the first face, a third face located between the first face and the second face, and a cutting edge located on an intersection of the first face and the third face. The first face includes a first region inclined so as be close to the second face as being separated away from the cutting edge. A virtual straight line orthogonal to the cutting edge is set as a first virtual straight line in a front view of the first face. A ten-point average of roughness the first region in a direction along the first virtual straight line is expressed by Rz1a and a ten-point average of roughness of the first region in a direction along the cutting edge is expressed by Rz1b, and Rz1a is larger than Rz1b.

In a diamond-coated tool, a flank face of a tool base material includes a first flank face continuously extending to a cutting edge, a second flank face located farther away from the cutting edge than the first flank face and located outside the first flank face when viewed from an inside of the tool base material, and a flank face-side stepped portion connecting the first flank face and the second flank face. A diamond-coated layer is provided on the first flank face and the flank face-side stepped portion.

A cutting tool is described herein that includes a body configured to rotate around a rotational axis. The cutting tool also includes a first plurality of cutting teeth each extending radially outwardly from the body, each cutting tooth of the first plurality of cutting teeth includes a cutting section positioned on a first side of a rotational plane that extends radially outwardly from the rotational axis and a non-cutting section positioned on a second, opposite side of the rotational plane. The cutting tool also includes a second plurality of cutting teeth each extending radially outwardly from the body, each cutting tooth of the second plurality of cutting teeth includes a cutting section positioned on the second side of the rotational plane and a non-cutting section positioned on the first side of the rotational plane.

A cutting insert includes a bottom surface, a top surface opposite to the bottom surface, and a cutting edge portion. The cutting edge portion is located on the same side as the top surface. The cutting edge portion is formed of a sintered material including cubic boron nitride particles. A volume ratio of the cubic boron nitride particles to the sintered material is more than or equal to 50 percent. The cutting edge portion includes a rake face, a flank face contiguous to the rake face, and a cutting edge located along a ridgeline between the rake face and the flank face. The rake face is inclined toward the bottom surface so that a distance from the rake face to the bottom surface decreases gradually toward the cutting edge.

A set of cutting inserts includes a stem portion, a plurality of branch portions attached to and extending from the stem portion, and at least one cutting insert attached to each of the plurality of branch portions. The stem portion has a longitudinal axis extending between a top end of the stem portion and a bottom end of the stem portion and at least one of the top end of the stem portion is disposed along the longitudinal axis above uppermost portions of each cutting insert, and the bottom end of the stem portion is disposed along the longitudinal axis below lowermost portions of each cutting insert. Also, methods for manufacturing a set of cutting inserts are disclosed.

In an embodiment, a cutting insert including a base member, a first face, a second face, a cutting edge, and a nose portion. The base member includes a coating layer on at least a part thereof. The first face has corner portions. The second face is adjacent to the first face. The cutting edge is on at least a part of the ridgeline portion of the first face and the second face, and includes first and second cutting edges. The first cutting edge is on the coating layer and has a C chamfered surface with a first width of 5 μm to 30 μm in the front view of the first face and a chamfer angle of 35° to 50°. The nose portion is at the corner portions between the first cutting edge and the second cutting edge.

A cutting insert includes a bottom surface, a top surface opposite to the bottom surface, and a cutting edge portion. The cutting edge portion is located on the same side as the top surface. The cutting edge portion is formed of a sintered material including cubic boron nitride particles. A volume ratio of the cubic boron nitride particles to the sintered material is more than or equal to 50 percent. The cutting edge portion includes a rake face, a flank face contiguous to the rake face, and a cutting edge located along a ridgeline between the rake face and the flank face. The rake face is inclined toward the bottom surface so that a distance from the rake face to the bottom surface decreases gradually toward the cutting edge.

A cutting insert may include a first surface, a second surface, a third surface, and a cutting edge. The first surface may include a first side part, a second side part, and a third side part. The cutting edge may be located at an intersection of the first surface and the third surface. The cutting edge may include a first cutting edge, a second cutting edge, and a third cutting edge. The third cutting edge may be located between the first cutting edge and the second cutting edge and have a convex curvilinear shape. The first cutting edge may be located asymmetrically relative to a bisector of an angle formed by the first side part and the second side part. The first surface may include a first inclined surface located along the first cutting edge and inclined toward the second surface at a first inclination angle.