A countersinking tool, comprising a tool shank and a tool head with multiple deburring or countersinking edges and an insertion pin. In some embodiments, the insertion pin features at least one reaming edge, on a radially outer side and extends over less than 33% of the overall length of the insertion pin, wherein the reaming edge can be inserted into an unfinished bore with a diameter, smaller than a nominal diameter of the bore, in a cutting fashion, wherein the reaming edge acts as a drill bit and is arranged on the insertion pin at a radius that corresponds to the radius of a nominal diameter of the bore, and wherein the insertion pin has the nominal diameter of the bore and can be guided in the bore without play. Also, a tool arrangement with a countersinking tool and to a method for producing a countersunk and/or deburred bore.

A cutting tool according to an aspect of the present disclosure includes a cutting edge portion which contains at least one of cubic boron nitride and polycrystalline diamond. The cutting edge portion includes a flank face, a negative land contiguous to the flank face, and a cutting edge formed by a ridgeline between the flank face and the negative land. At least one of the negative land and the flank face is provided with a plurality of recesses and a projection. The projection is formed by arranging the edges of adjacent recesses in contact with each other.

A rotary tool according to a non-limiting aspect includes a body having a rotation axis and extending from a first end to a second end. The body including: a first part including the first end; a second part located closer to a second end than the first part and having a larger outside diameter than the first part; a cutting edge located at a side of the first end; a ridge portion located in the first part and the second part, connected to the cutting edge and helically extending from the cutting edge toward the second end; and a flute located along the ridge portion. The flute includes: a first flute located at the first part and having a first helix angle; and a second flute located at the second part and having a second helix angle. The second helix angle is smaller than the first helix angle.

A surface-coated cutting tool includes a substrate and a coating formed on a surface of the substrate, the coating including one or two or more layers, at least one of the layers being an Al-rich layer including hard particles, the hard particle having a sodium chloride type crystal structure, and including a first unit phase in a form of a plurality of lumps and a second unit phase interposed between the lumps of the first unit phase, the first unit phase being composed of a nitride or carbonitride of Al.sub.xTi.sub.1x, the first unit phase having an atomic ratio x of Al of 0.7 or more and 0.96 or less, the second unit phase being composed of a nitride or carbonitride of Al.sub.yTi.sub.1y, the second unit phase having an atomic ratio y of Al exceeding 0.5 and less than 0.7.

A surface-coated cutting tool includes a substrate and a coating formed on a surface of the substrate, the coating including one or two or more layers, at least one of the layers being an Al-rich layer including hard particles, the hard particle having a sodium chloride type crystal structure, and including a first unit phase in a form of a plurality of lumps and a second unit phase interposed between the lumps of the first unit phase, the first unit phase being composed of a nitride or carbonitride of Al.sub.xTi.sub.1-x, the first unit phase having an atomic ratio x of Al of 0.7 or more and 0.96 or less, the second unit phase being composed of a nitride or carbonitride of Al.sub.yTi.sub.1-y, the second unit phase having an atomic ratio y of Al exceeding 0.5 and less than 0.7.

This disclosure relates to a cutting tool having a tool head that can be rotated about its mid-axis and has a front end face and a circumferential surface, a plurality of cutting elements and associated chip grooves arranged to be distributed in the circumferential direction on the circumferential surface, and a channel system running through the tool head for the coolant supply to the cutting elements. According to this disclosure, the end face of the tool head has coolant grooves, which each lead from an outlet opening of the channel system to an end opening in a chip groove, wherein the longitudinal openings of the coolant grooves are covered by a baffle plate fixed to the front face of the tool head.

A cutting tool comprising: (a) a shank being configured to connect the cutting tool to machine; (b) a body connected to and extending from the shank, the body including: (i) a longitudinal axis; (ii) a plurality of flutes, (iii) one or more pockets located in one or more of the plurality of flutes; (iv) one or more shield substrates located in each of the one or more pockets; and (v) one or more joints connecting the one or more shield substrates to the one or more pockets, the one or more joints including a leading portion; (c) a tip connected to and extending from the body, the tip including a cutting surface that extends radially outward from the longitudinal axis a distance so that a clearance cut by the tip into a substrate is sufficiently large so that the leading portion of the one or more joints extends within the clearance.

A tapered drill bit having a proximal end and a distal end includes a shank extending from the distal end at least partially towards the proximal end of the tapered drill bit and a body coupled to the shank. The body includes a tapered portion and the body extends from the shank to the proximal end of the tapered drill bit. The tapered drill bit further includes at least one flute extending from the proximal end along a portion of the body. The tapered drill bit also includes a conduit extending from an inlet aperture at the distal end to an outlet aperture, wherein the outlet aperture is formed through the at least one flute.

A tool alignment device for mounting on a tool having a stop, especially on a drilling and/or countersinking tool having a single-piece tool shaft and a stop, for alignment of a drill hole and/or countersink to be introduced or for alignment of a finishing step in relation to a normal to the surface of a workpiece, comprising a main part and a through hole. Upon mechanical contact between the tool alignment device and the surface of the workpiece, a signaling device is actuated and emits alignment signal(s) during alignment in an alignment direction, and the stop of the tool can be accommodated in the main part, which comprises a guide device which establishes a connection between a stop sleeve of the stop and the tool alignment device such that the stop can be aligned in the alignment direction. Also, a drilling, milling and/or countersinking tool having a stop.

A machining tool for deburring boreholes, which lead laterally into a recess, comprising: a shaft; a cutting head with at least one circumferential cutting blade associated with a chip groove and having a cutting edge extending, at least in sections, in an axial direction, and which can perform a cutting process by virtue of relative movement between the tool and a workpiece, and which lies on a virtual cylindrical rotation surface; and at least one cutting-blade-free and chip-groove-free surface area; at least one fluid channel closed on the cutting head side, extending through the shaft into the cutting head; and at least one branch channel with an outlet opening. The outlet opening is in a dynamic pressure active surface radially set back relative to the virtual rotation surface, and is larger than a flow cross-sectional area of the at least one branch channel at the outlet opening.