Abstract: A method of making a construction for an indexable cutter insert, the method including providing a wafer (20) comprising ceramic material, the wafer (20) being substantially unsupported by a cemented carbide substrate and having a mean thickness of at most 2 mm; providing an insert base (30) having proximate and distal major ends (33, 34) connected by peripheral sides (36), the proximate end (33) of the insert base (30) being configured to have at least two corners (35) defined by junctions of the peripheral sides (36); the wafer (20) being configured to have at least two corners (25) corresponding to the two corners (35) of the proximate end (33) of the insert base (30); the method including bonding the wafer (20) to the proximate end (33) by means of a bond material, the corners (25) of the wafer (20) being disposed adjacent the corresponding corners (35) of the proximate end (33) to provide the construction.

Abstract: A method of making a construction for an indexable cutter insert, the method including providing a wafer (20) comprising ceramic material, the wafer (20) being substantially unsupported by a cemented carbide substrate and having a mean thickness of at most 2 mm; providing an insert base (30) having proximate and distal major ends (33, 34) connected by peripheral sides (36), the proximate end (33) of the insert base (30) being configured to have at least two corners (35) defined by junctions of the peripheral sides (36); the wafer (20) being configured to have at least two corners (25) corresponding to the two corners (35) of the proximate end (33) of the insert base (30); the method including bonding the wafer (20) to the proximate end (33) by means of a bond material, the corners (25) of the wafer (20) being disposed adjacent the corresponding corners (35) of the proximate end (33) to provide the construction.

Abstract: A method of producing a plurality of tool inserts (20) from a body of polycrystalline ultra-hard material (10), in particular polycrystalline diamond and polycrystalline cubic boron nitride, having major surfaces (12, 14) on each of opposite sides thereof. The method includes the step of simultaneously producing a plurality of spaced holes (16, 26) in the body, each hole generally extending from one major surface to the opposite major surface. The holes are produced by a plurality of electrodes which may be arranged in a desired pattern. The body is severed between the holes to produce the plurality of tool inserts.