A method for producing a cutting tool, in particular a drill bit, is specified wherein the cutting tool has a front end (F) at the front and a rear end (R) toward the rear, wherein a tool tip is formed on the front end (F), a point thinning is ground at the tool tip with a grinding tool, the point thinning being ground to be narrower toward the front than toward the rear. The point thinning is ground with a constant point thinning angle (AW). Furthermore, a corresponding cutting tool is specified.

A method of forming an instrumented cutting element comprises forming a free-standing sintered diamond table having at least one chamber in the free-standing sintered diamond table, providing a doped diamond material within the at least one chamber, and attaching a substrate to the free-standing sintered diamond table to form an instrumented cutting element. The instrumented cutting element includes the doped diamond material disposed within the sintered diamond table on the substrate. A method of forming an earth-boring tool comprises attaching at least one instrumented cutting element to a body of an earth-boring tool. The at least one instrumented cutting element has a diamond table bonded to a substrate. The diamond table has at least one sensing element disposed at least partially within the diamond table. The at least one sensing element comprises a doped diamond material.

A method of forming an instrumented cutting element comprises forming a free-standing sintered diamond table having at least one chamber in the free-standing sintered diamond table, providing a doped diamond material within the at least one chamber, and attaching a substrate to the free-standing sintered diamond table to form an instrumented cutting element. The instrumented cutting element includes the doped diamond material disposed within the sintered diamond table on the substrate. A method of forming an earth-boring tool comprises attaching at least one instrumented cutting element to a body of an earth-boring tool. The at least one instrumented cutting element has a diamond table bonded to a substrate. The diamond table has at least one sensing element disposed at least partially within the diamond table. The at least one sensing element comprises a doped diamond material.

A machining tool (1) comprises a clamping section (2), which extends along a central axis (M), a cutting section (3), which adjoins the clamping section (2) and has a nominal diameter (DN), and at least one cooling duct (4), which preferably extends in the clamping section (2) and in the cutting section (3), wherein the cross-sectional shape of the cooling duct (4) is arranged in a cross-sectional region (Q) of the respective section (2, 3) in which the equivalent stress under a machining load has a value which is as small as possible, and/or wherein the cross-sectional shape of the cooling duct (4) is defined by an inner curve segment (5), an outer curve segment (6), which is arranged at a distance from the latter, and by means of two tangents (7) connecting the two curve segments (5, 6).

A process for producing a tool having a main body which extends in a longitudinal direction and at least one blade for machining a workpiece includes providing a base coating on the tool; grinding the at least one blade in a manner that removes the base coating in the region of the at least one blade; and providing a second, fine coating, to the at least one ground blade.

A process for producing a tool having a main body which extends in a longitudinal direction and at least one blade for machining a workpiece includes providing a base coating on the tool; grinding the at least one blade in a manner that removes the base coating in the region of the at least one blade; and providing a second, fine coating, to the at least one ground blade.

A drill bit including a body, a shank, and a cutting head. The body has a first end and a second end. The shank is located at the first end. The cutting head is located at the second end. The cutting head includes a tip, a first cutting edge, and a second cutting edge. The first cutting edge extends from the tip at a first angle. The second cutting edge extends from the tip at a second angle. The second angle is different from the first angle.

A drill bit including a body, a shank, and a cutting head. The body has a first end and a second end. The shank is located at the first end. The cutting head is located at the second end. The cutting head includes a tip, a first cutting edge, and a second cutting edge. The first cutting edge extends from the tip at a first angle. The second cutting edge extends from the tip at a second angle. The second angle is different from the first angle.

A method for the laser-based generation of a structure on a rake face of a cutting tool is disclosed, where at least one structure is formed by lines that are generated with a mutual spacing of at most 400 m with a laser beam at least in areas within a predetermined contour on at least one rake face of the cutting tool. A course of the lines forming the structure is oriented with respect to a profile of at least one cutting edge of the at least one rake face.

A bore cutting tool for cutting metal workpieces includes a tool substrate and a tool coating on a surface of the tool substrate. The bore cutting tool includes a plurality of pits in the surface of the tool substrate and wherein the tool coating extends over the pits such that the pit surface includes the tool coating. In this way, the pit dimensions can be retained over prolonged tool life and the pits, with their coated surface, are particularly effective at retaining lubricant so that the thickness of a lubricant film can be increased as compared to a tool without the coated pits. In the embodiments, the pits are formed by laser etching and are present only on the cylindrical land. Average pit depth is suitably in the range 8 m to 25 m, average pit width and pit length is independently selected from 40 m to 250 m and average pit density may be 20 to 30 pits/mm.sup.2.