A double sided V-shaped cutting insert includes insert front and back surfaces and a peripheral surface extending therebetween. The peripheral surface has a forward surface, a first planar converging surface, and a first rake surface extending between the forward surface and the first converging surface. A second planar converging surface forms a convergence angle , 3045 with the first converging surface. A second rake surface extends between the forward surface and the second converging surface. In a view perpendicular to the insert front surface, the cutting insert exhibits mirror symmetry about a bisector plane passing between the first and second rake surfaces. The first and second rake surfaces each face away from the bisector plane. The first rake surface tends towards the bisector plane more than the first converging surface, and the second rake surface tends towards the bisector plane more than the second converging surface.

A cutting tool holder of the kind in which the fastening screw (securing member) remains engaged with the tool holder seat during mounting/dismounting of the cutting insert. The seat is further formed with a support surface configured for engaging and providing support to the head portion of the securing member at least in the securing position.

A green body for a cross-hole, compacted cutting insert, as well as a cutting insert, equipment for making a green body, and method for making a green body, wherein the green body includes a first side, a second side, and a side surface extending between the first side and the second side entirely around the first side and the second side. The green body includes a quadrilateral-shaped cross-hole extending through the green body from a first location on the side surface to a second location on the side surface on an opposite side of the green body from the first location. The quadrilateral-shape of the cross-hole can assist in achieving a more uniform density of compactable material in the green body.

There is provided a cutting insert used for both drilling and turning. The cutting insert includes an insert main body having a front surface and a rear surface, the outline shapes of which are parallelogram shapes, peripheral side surfaces disposed on four sides of the insert main body, cutting edges provided on respective intersecting ridge lines between the front surface and the peripheral side surface and between the rear surface and the peripheral side surface of the insert main body, and a hole provided in the insert main body to incline with respect to the front surface and the rear surface, the hole being usable for attachment.

A cutting tool holder (110) configured for mounting thereon a cutting insert (140). The cutting tool holder comprises a body (112) formed with an insert seat (120) configured receiving therein the cutting insert and a seat bore (135) configured for accommodating therein a fastening member (150). The cutting tool holder also comprises an anchoring element (170) received within the body of the holder, the fastening element being configured for secured engagement with the anchoring element and being free of such engagement with the seat bore.

A double-sided cutting insert with orientation-assisting geometry includes identical and opposite first and second main surfaces and a peripheral surface which extends therebetween. The insert further includes a median plane located midway between the first and second main surfaces and opposite first and second clamping recesses opening out respectively to the first and second main surfaces. Projections onto the median plane of at least portions of the first and second clamping recesses are rotationally offset from one another about a central axis.

In an embodiment, a cutting insert includes an upper surface, a one or more side surfaces, and a cutting edge. The upper surface includes a first corner portion, and a first side that is adjacent to the first corner portion. The side surfaces are adjacent to the upper surface. The cutting edge is disposed on at least a portion of a section where the upper surface and the side surfaces intersect. The cutting edge includes first, second, third and fourth cutting edges. The first cutting edge is disposed at the first corner portion and has a convex curved shape. The second cutting edge is next to the first cutting edge, and has a linear shape. The third cutting edge is next to the second cutting edge, and has a convex curved shape. The fourth cutting edge is next to the third cutting edge on the first side.

A cutting insert is provided, comprising a top surface, a bottom surface, a plurality of side surfaces spanning therebetween, and a cutting edge formed at an intersection of the side surface and a forwardly-disposed portion of the top the surface. It further comprises a cooling cavity projecting into the insert, a top end thereof being disposed further forwardly than an open bottom end thereof. The cooling cavity defines at least one molding axis such that a solid element having the shape of the cooling cavity and completely inserted therein may be retracted intact therefrom along a linear path parallel to the molding axis. A circumscribing portion is formed on the side surfaces encircling the cutting insert. The circumscribing portion is formed parallel to the molding axis and has a non-zero height along its entire extent. The cutting insert does not extend beyond the circumscribing portion.

A cutting edge tip of a cubic boron nitride sintered body has improved joint strength to a substrate of a cemented carbide. A cutting edge tip of a cubic boron nitride sintered body has improved crater wear resistance. A tool 10 of the present invention includes a substrate 12 of a cemented carbide and a cutting edge tip 14 of a cubic boron nitride sintered body joined to the substrate 12. The cutting edge tip 14 has a thickness covering an upper surface 12a to a lower surface 12b of the substrate 12. The cubic boron nitride sintered body contains 50 volume % or more and 95 volume % or less of cubic boron nitride and 5 volume % or more and 50 volume % or less of a binder phase. The cubic boron nitride has an average grain size of 1.0 m or more and 6.0 m or less.

A double-sided cutting insert includes two end surfaces that each includes major rake surfaces adjacent major cutting edges that form first angles with planes of major side surfaces of the insert, and a central support surface forming a second angle with the planes of the major side surfaces. Each end surface further includes major intermediate surfaces between the major rake surfaces and the central support surface. The major intermediate surfaces form third angles with the planes of the major side surfaces that are greater than the first angles and smaller than the second armies when measured in a central plane that extends along a central axis of the hole and is generally perpendicular to the planes of the major side surfaces and planes of the central support surfaces.