Abstract: A cutting insert having a main lip, a rake face and at least one coolant duct, which is formed on the top side of the cutting insert, is disclosed. The at least one coolant duct runs at least partially in the rake face towards the main lip and the width increases towards the main lip.

Abstract: A rotary cutting tool is provided with a tool body having a shank portion and a neck portion, an insert attachment seat formed at the tip of the neck portion, and a cutting insert detachably mounted on the insert attachment seat so as to be coaxial with the axis line of the shank portion. The insert attachment seat is provided with a bottom surface on which a side surface which serves as a seating surface of a cutting insert is seated and a wall surface in contact with a peripheral surface of the cutting insert. On the bottom surface, a plurality of recessed grooves which are recessed from the bottom surface to extend in the circumferential direction of the neck portion, with the both ends being opened on an outer peripheral surface of the neck portion.

Abstract: A cutting assembly useful for the chipforming removal of material from a workpiece at the cutting insert-workpiece interface. The cutting assembly has a holder with a coolant passage and a seat. As one option, a stud extends away from the seat and facilitates coolant flow to an insert locking cap, which attaches to the stud. The insert locking cap directs coolant flow toward the cutting insert-workpiece interface. As another option, a diverter plate has a bottom surface with a bowl and an arcuate forward surface with one or more openings. Coolant flows from the coolant passage into the bowl then exits through at least one opening in the arcuate forward surface towards the cutting insert-workpiece interface.

Abstract: A metalcutting insert that is useful in chipforming and material removal from a workpiece. The metalcutting insert includes a metalcutting insert body, which includes a cutting edge having at least one discrete cutting location. The metalcutting insert body further contains a distinct interior coolant passage communicating with the discrete cutting location. The distinct interior coolant passage has a coolant passage inlet defining a coolant passage inlet cross-sectional area, a coolant passage discharge defining a coolant passage discharge cross-sectional area, and an axial coolant passage length. The distinct interior coolant passage defines a coolant flow cross-sectional area along the axial coolant passage length thereof. The metalcutting insert further includes a plurality of surface features for enhancing coolant flow to the cutting edge.

Abstract: A cutting tool holder has a holder body and upper and base jaws. An insert receiving pocket is defined between the upper and base jaw, for receiving a cutting insert therein. A resilience recess allows the upper jaw to deflect toward the base jaw. An upper jaw coolant channel has an upper jaw inlet, opening out to the resilience recess, and an upper jaw outlet, opening out to a front end of the upper jaw. A holder body coolant channel has a holder body outlet, opening out to the resilience recess, spaced apart from the upper jaw inlet. A compressible tool coolant plug, made of compressible material, is inserted into the resilience recess. The plug has a plug coolant channel opening out toward the upper jaw inlet and the holder body outlet, forming a fluid path from the holder body coolant channel to the upper jaw coolant channel.

Abstract: A method of grooving a work-piece of superalloy uses a grooving cutting insert at least partially covered with a Cubic Boron Nitride (CBN) layer and having one or more interior ducts formed therein which open out to the insert's rake face at one or more corresponding openings. One or more coolant fluid streams, conveyed via these interior ducts at a pressure of no less than 200 bars, are directed upwardly and outwardly toward an interaction area between a cutting edge of the cutting insert and the work-piece, to thereby limit lengths of work-piece chips created during the grooving operation. The openings of the cutting insert's interior ducts may be located between 0.5-3.0 mm from the insert's cutting edge.

Abstract: A milling cutter, having an adjustable cooling mechanism, has a tool body having a body central bore. At least one flute is formed on a body peripheral face. Each flute comprises a first row of insert pockets and at least a second row of insert pockets axially rearwardly displaced from the first row. The cooling mechanism includes a center pin having at least two grooves axially spaced apart from one another along the length of the center pin. A relocatable seal is seated in one of the grooves. When the relocatable seal is seated in a first groove, the body central bore is in fluid communication with cooling holes associated with a first number of rows of inserts; when the relocatable seal is seated in a second groove, the body central bore is in fluid communication with cooling holes associated with a second number of rows of inserts.

Abstract: A cutting tool (10, 36, 43) includes a coolant channel (22) having a coolant outlet (24) formed with an elongated shape, wherein a medial line (A) extending longitudinally along the coolant outlet (24) comprises a bend (60). The coolant outlet may be formed on a housing which is mounted on a tool body, or may be formed directly on the tool body itself.

Abstract: A cutting device comprising a cutting insert and a holding part with a beam part, extending in a longitudinal direction, and a clamping head, which projects beyond an upper side of the holding part with a projection, wherein the projection is connected to a first of two clamping fingers which between them form a receiving pocket for receiving the cutting insert. A clamping gap is provided underneath the projection to allow the first clamping finger to be elastically movable. The clamping gap opens out into the receiving pocket and runs from an end face of the holding part that is facing the workpiece to be worked in the longitudinal direction up to the rear end of said holding part, which rear end is arranged in the transitional region between the clamping head and the beam part. A coolant and/or lubricant guide is provided for feeding coolant and/or lubricant to a coolant and/or lubricant outlet arranged in the projection.

Abstract: A cutting tool with a substrate which is coated with a coating layer containing TiaAlbNbdMe(C1-xNx), where M represents one or more elements selected from among Si, W, Mo, Ta, Hf, Cr, Zr and Y, where 0.1?a?0.7, 0?b?0.8, 0.02?d?0.25, 0?e?25, a+b+d+e=1.0 and 0?x?1 and is provided with a rake face; a flank face; a cutting edge between the rake face and the flank face; and droplets on the surface of the coating layer. The droplets include finer droplets having particle diameters of 300 nm or less; and coarser droplets having particle diameters of 1000 nm or more. The flank face has a higher percentage of the finer droplets than the rake face. An Nb content in the coarser droplets on the flank face is higher than an Nb of the coarser droplets on the rake face.

Abstract: To provide a coolant supply structure for a turret tool rest in which the central part of the intermediate shaft can be utilized effectively as a space and there is no need to allow this shaft to be hollow when a shaft such as a driving shaft is inserted. In a coolant supply structure for a turret tool rest to supply a coolant to a tool mounting part of a turret 12, which is provided in a turret tool rest 1 having a turret 12 with a tool T being mounted thereon, a hollow rotating shaft 15 for rotating the turret 12 and a hollow intermediate shaft 19 arranged within the rotating shaft 15, wherein the coolant supply structure has a cylindrical member 23 inserted into the intermediate shaft 19, and a space served as a passage 24 of the coolant is formed between the cylindrical member 23 and the intermediate shaft 19.

Abstract: A cutting insert for use in a chipforming material removal operation that includes a cutting insert body, which has a seating surface, a flank face, and a corner cutting region at the intersection of a peripheral edge and the flank adjacent corresponding corners thereof. The cutting insert body contains a central aperture. The seating surface contains a coolant delivery trough, which has a radial orientation toward a corresponding corner cutting region. The coolant delivery trough has a radial outward end terminating at the peripheral edge and a radial inward end opening into the central aperture. There are a pair of lateral topographic regions wherein the one lateral topographic region is along one side of the coolant delivery trough and the other lateral topographic region is along other side of the coolant delivery trough.

Abstract: A holder assembly for a cutting tool insert for machining operations. The holder assembly has first and second spaced apart clamping members, each having respective inner seating surfaces facing one another and defining an intermediate gap to receive the cutting tool. The clamping members are movable towards each other by a clamping mechanism to clamp and secure the cutting tool insert between the seating surfaces. The clamping mechanism includes a drawbar that is received in a cavity formed in each of the clamping members and are aligned with each other and extends in a transverse direction in relation to the intermediate gap. The clamping mechanism also includes a compression spring member, which presses the clamping members towards each other to secure clamping of the cutting tool insert. The clamping mechanism is released by a releasing member that overcomes the spring force acting to move the clamping members towards each other.

Abstract: A rotational tool includes a cutting head and a basic body. The cutting head includes a cutting portion including a chip flute and at least one of a cutting edge and an insert seat, where the chip flute is located before the at least one of the cutting edge and the insert seat in a rotational direction of the cutting head. A coupling portion is located axially rearward of the cutting portion relative to a cutting end of the cutting head, and is configured to couple to the basic body. A coolant slot extends axially and opens at an external radial surface of at least a portion of the cutting head.

Abstract: A turning tool for internal machining has a spiral groove at a head section entering an inside of a workpiece. The turning tool includes a tool body, which has a head section and a shank section extending from the head section, and a cutting insert. The head section includes the following: a flat portion extending from a front end of the head section, which enters the inside of a workpiece, toward the shank section; an insert pocket formed at an edge of the flat portion as offset from a central axis of the tool body; and a chip flute extending from a proximity of the insert pocket toward the shank section across the central axis of the tool body and including a spiral curved surface on a peripheral surface of the head section. The cutting insert is replaceably mounted to the insert pocket.

Abstract: A tool for machining a workpiece is presented. The tool has a cutting insert with at least one cutting edge, a holder having a shank, and a cutting insert receptacle, wherein the cutting insert receptacle is arranged in a region of a workpiece-side end face of the shank, and the cutting insert is disposed in the cutting insert receptacle. The holder has a coolant bore, which opens out into a plurality of coolant outlets. The plurality of coolant outlets are arranged on the workpiece-side end face of the shank, alongside the cutting insert receptacle, and are oriented such that coolant is discharged towards the cutting insert. At least some of the coolant outlets lie in a coolant outlet plane which runs parallel to and offset from a cutting insert plane running through the cutting insert receptacle, where the coolant outlet plane and the cutting insert plane run parallel to the longitudinal direction of the shank.

Abstract: A tool has a shank and a cutting blade mounted on the shank. The tool also includes an internal fluid passage for drawing in, together with air, chips produced when the cutting blade machines a workpiece. The internal fluid passage comprises a through hole made in the shank, at least one main inlet hole for drawing in the chips together with the air, the main inlet hole being made in the cutting blade and being in fluid communication with the through hole, and at least one sub-inlet hole for drawing in at least the air, the sub-inlet hole being made in the shank and being in fluid communication with the through hole. The chips can efficiently be discharged from the tool without being deposited in the internal fluid passage, by the air which flows at a suitable speed through the internal fluid passage and draws the chips, regardless of the diameter of the tool.

Abstract: A cutting tool includes a tool body having a plurality of pockets for receiving cutting inserts. Each pocket includes a bottom support surface, an axial support surface, a radial support surface and a corner relief between the bottom support surface and the radial support surface. A non-circular recess is formed proximate the pocket, and a coolant passage is disposed within the recess. The recess reduces a tensile stress of the cutting tool during a machining operation.

Abstract: The invention relates to a cassette for a milling cutter having a cutter carrier and a clamping part, which together constitute a generally rectangular cassette, the cutter carrier and the clamping part being loosely placed on each other and together delimiting a fastening opening for a fastening screw by means of which the cassette can be fastened in a receiver of a milling cutter, the cutter carrier having a seat for a cutting insert. The invention additionally relates to a milling cutter having at least one receiver for a cassette and having at least one such cassette. A gap, S, between the cutter carrier and the clamping part is located below the cutting tip of the cutting insert to prevent chips from being lodged in the gap, S.

Abstract: In a shank portion of an end mill which is chucked by a tool holder, flat surfaces are formed at a plurality of circumferential positions in the outer periphery of the shank portion so that the flat surfaces abut on side lock bolts attached to a body of the tool holder.

Abstract: A cutting tool comprises a cutting insert, a tool holder, and a fastener. The cutting insert comprises a cutting edge and a fastener bore adapted to accept a fastener for fastening together the cutting tool and tool holder. A coolant flow recess in the fastener bore is adapted to direct coolant through the coolant flow recess and toward a head portion of the fastener. The tool holder comprises an insert pocket adapted to removably fasten the cutting insert and fastener to the tool holder, and a coolant bore adapted to direct the coolant from the tool holder to the coolant flow recess of the fastener bore. The head portion of the fastener and the coolant flow recess of the fastener bore define a gap that directs the coolant to the cutting edge of the cutting insert.

Abstract: The invention relates to a cassette for a milling cutter, having a cutter carrier and a clamping part, which together constitute a generally rectangular cassette, the cutter carrier and the clamping part being loosely placed on each other and together delimiting a fastening opening for a fastening screw by means of which the cassette can be fastened in a receiver of a milling cutter, the cutter carrier having a seat for a cutting insert. The invention additionally relates to a milling cutter having at least one receiver for a cassette and having at least one such cassette.

Abstract: A milling tool for hobbing a workpiece. The milling tool includes a cylindrical tool body having a rotation axis and a plurality of disc-shaped segments. Each of the segments including a hub part and a peripheral cam having a plurality of tangentially spaced-apart milling inserts. Each segment has a through hole situated on the rotation axis. Each of the holes is directed in relation to each other such that a central duct is formed in the cylindrical tool body. Bordering segments are detachably torsionally rigidly interconnected The milling tool also includes a first end piece, which on one side is detachably and torsionally rigidly interconnected with a first one of the segments and which on the other side has coupling members for torsionally rigid coupling to a source of torque, such that all torque from the source is supplied to the cylindrical tool body via the first end piece.

Abstract: A cutting tool has a cutter body, which carries a cutting insert, and an adapter, which has a longitudinal adapter axis, wherein a locking screw attaches the cutter body to the adapter. A coolant volume is defined in a vicinity of a meeting of the cutter body, the adapter and the locking screw. The adapter contains an axial adapter bore. The locking screw contains a transverse locking screw bore in fluid communication with the axial adapter bore. The locking screw further contains a peripheral transverse locking screw bore passage in fluid communication with the coolant volume and the transverse locking screw bore. The coolant volume and the transverse locking screw bore are in fluid communication with the cutter body coolant passage.

Abstract: A tool comprising a cutting section on which a multiplicity of blades or cutting edges and flutes are formed; a shank section, which forms a chucking section on a side which faces away from the cutting section, wherein a number of fluid channels which corresponds to the number of flutes is formed in the chucking section in such a manner that the fluid which emerges from axial discharge openings of the chucking section can be fed in a free jet along the shank into in each case one associated flute of the cutting section. Also, a method for supplying the blades of such a tool.

Abstract: A cutting tool for machining a workpiece. The cutting tool comprises a holder and at least two cutting inserts which are separated from each other by a spacer element. The cutting tool may be used to produce two or more bevels (and/or joints and/or grooves) at precisely defined spacings in only one operation. Through the use of spacer elements of different lengths, it is possible to produce bevels at different spacings. The spacer element preferably has an interface which comprises only radial contact surfaces, which run parallel to a longitudinal axis of the spacer element, and a substantially flat axial contact surface, which runs transverse to the longitudinal axis. The length of the spacer element can therefore be shortened on the rear side of the spacer element without destroying said interface.

Abstract: A rotational tool includes a cutting head and a basic body. The cutting head includes a cutting portion including a chip flute and at least one of a cutting edge and an insert seat, where the chip flute is located before the at least one of the cutting edge and the insert seat in a rotational direction of the cutting head. A coupling portion is located axially rearward of the cutting portion relative to a cutting end of the cutting head, and is configured to couple to the basic body. A coolant slot extends axially and opens at an external radial surface of at least a portion of the cutting head.

Abstract: The present invention relates to a bit for processing the inside diameter of a work material, the bit having on the outer surface of a shank a vibration preventing structure comprising a vibration absorption body made of a silicone material, and a hollow wire rod, thereby absorbing the vibration generated from a machine tool, preventing resonance generated between the work material and a tool, and thus, enabling the implementation of a slickenside from ultra-precision machining.

Abstract: A cutting insert (20) comprising a cutting portion and a cooling portion. The cutting portion has a rake surface (26), a relief surface (28) and a cutting edge (24) defined at the intersection between the rake surface (26) and the relief surface (28). The cooling portion has an operative surface and a cooling nozzle (32) integrally formed therewith. The nozzle (32) is spaced from the cutting edge (24) and having a cooling aperture (CA2) directed at the cutting edge (24) at an acute angle with respect to the rake surface face (26). The operative surface is one of the rake surface (26) and a surface of the cutting element other than the rake surface (26), disposed at a location more remote from the cutting edge (24) than the rake surface (26), so that the rake surface (26) is disposed between the cutting edge (24) and the cooling aperture (CA2).

Abstract: A cutting tool assembly includes a parting blade and a blade holder for holding same. The cutting tool assembly is configured for conveying pressurized coolant via the blade holder to a cutting portion of the parting blade. The blade holder includes a deceleration chamber configured for reducing impact of the pressurized coolant against the parting blade.

Abstract: A cutting tool includes a tool body and an ambidextrous clamp for removably securing a cutting insert to the tool body. The clamp has at least one internal fluid duct passing through a space between two clamp screw throughbores located mirror symmetrically with respect to a plane of symmetry and extending from a coolant fluid inlet port to at least one discharge orifice. The clamp is secured to the tool body by a single screw located in one of the clamp screw throughbores and threadingly engaged with a single threaded bore of the tool body. The same clamp is used in both left-handed and right-handed tools, and the jet of the coolant fluid is ejected from the discharge orifice of the clamp onto the same region of the cutting insert in both cases.

Abstract: A machining tool comprising at least one plate-shaped cutting insert made of impact- and/or wear-resistant cutting material at least in some sections and which is adhesively bonded to a cutter holder directly by means of an adhesive layer in an immovable manner by means of a contact surface arrangement, the cutting insert substantially prism-shaped. A base area of the prism is adhesively bonded to the cutting insert holder substantially over the full area, a jacket surface arrangement of the prism adjacent to the cutting edge for spatially fixing the cutter is drawn to the tool, and a section of the jacket surface arrangement substantially opposite the cutting edge is caught in a fitting groove of the cutting insert holder.

Abstract: A cutting tool has an internal cutting tool fluid delivery system. The cutting tool has a tool body and a fluid delivery head coupled thereto by a solid coupling member with a continuous male thread. The tool body includes a body coupling bore and the head includes a head coupling bore which communicates with the body coupling bore. At least one of the body and head coupling bores includes a circumferentially interrupted female thread which has a longitudinal thread axis and a radial outer thread boundary. The or each coupling bore having the female thread includes a thread passage which extends along the thread axis. In an axial cross section of the female thread, the thread passage extends both inside and outside the radial outer thread boundary.

Abstract: The application relates to a machining tool (1) comprising a cutting part (2) and a base (3) that supports the cutting part (2). According to the invention, the base (3) and/or the cutting part (2) are made at least in part of a fiber-reinforced plastic, especially CFRP or CFC.

Abstract: A cutting insert for use in a chipforming material removal operation that includes a cutting insert body, which has a seating surface, a flank face, and a corner cutting region at the intersection of a peripheral edge and the flank adjacent corresponding corners thereof. The cutting insert body contains a central aperture. The seating surface contains a coolant delivery trough, which has a radial orientation toward a corresponding corner cutting region. The coolant delivery trough has a radial outward end terminating at the peripheral edge and a radial inward end opening into the central aperture. There are a pair of lateral topographic regions wherein the one lateral topographic region is along one side of the coolant delivery trough and the other lateral topographic region is along other side of the coolant delivery trough.

Abstract: A cutting insert for use in a chipforming material removal operation that includes a cutting insert body, which has a seating surface, a flank face, and a corner cutting region at the intersection of a peripheral edge and the flank adjacent corresponding corners thereof. The cutting insert body contains a central aperture. The seating surface contains a coolant delivery trough, which has a radial orientation toward a corresponding corner cutting region. The coolant delivery trough has a radial outward end terminating at the peripheral edge and a radial inward end opening into the central aperture. There are a pair of lateral topographic regions wherein the one lateral topographic region is along one side of the coolant delivery trough and the other lateral topographic region is along other side of the coolant delivery trough.

Abstract: A cutting tool comprises a cutting insert, a tool holder, and a fastener. The cutting insert comprises a cutting edge and a fastener bore adapted to accept a fastener for fastening together the cutting tool and tool holder. A coolant flow recess in the fastener bore is adapted to direct coolant though the coolant flow recess and toward a head portion of the fastener. The tool holder comprises an insert pocket adapted to removably fasten the cutting insert and fastener to the tool holder, and a coolant bore adapted to direct the coolant from the tool holder to the coolant flow recess of the fastener bore. The head portion of the fastener and the coolant flow recess of the fastener bore define a gap that directs the coolant to the cutting edge of the cutting insert.

Abstract: A cutting device includes a cutting tool, a chip guide unit including a hole-shaped chip guiding channel, which includes an inlet and an outlet defined respectively in a vicinity of an area of contact of the cutting tool with a workpiece and at a location remote from the workpiece, and a forced discharge fluid medium supply unit that supplies a fluid medium from a location along the chip guiding channel towards the outlet. The forced discharge fluid medium supply unit includes a fluid supply port defined in an inner wall surface of the chip guiding channel so as to open towards the outlet in a tilted orientation relative to a longitudinal axis of the chip guiding channel. The fluid supply port opens in the inner wall surface of the chip guiding channel over an entire range of circumference thereof.

Abstract: A cutting tool includes a coolant conveying member, to provide coolant fluid to a cutting area during a cutting operation. The coolant conveying member includes a member body having a fluid passage formed therein, and a nozzle to convey and to jet out the coolant fluid therethrough. The nozzle is shiftable relative to the member body, between a first, extended position and a second, retracted position. In the extended position, for example, assumed during the cutting operation—the nozzle extends out and forwardly from the member body, stabilized by the continuous flow of coolant fluid therethrough, forcing the nozzle forwardly. In the retracted position, for example, assumed when the when the coolant fluid does not flow through the coolant conveying member, or flows at a very low rate, the nozzle may be at least partially accommodated in the fluid passage, to allow, for example, indexing or replacing of the cutting insert.

Abstract: A cutting insert rotated about an axis may be utilized during a metal working operation and applied against the rotating workpiece to enhance tool performance. Coolant may be provided through the central bore of the cutting insert utilizing bypass ports around the threaded hold-down bolts. Additionally, the cutting insert may be held within the toolholder pocket utilizing hoop walls which follow a serpentine path to provide flexibility. Finally, relative rotation of the cutting insert with respect to the toolholder body may be prevented utilizing a pair of protrusions within the toolholder pocket which engage a pair of recesses within a side of the cutting insert.

Abstract: A cutting insert for use in a chipforming material removal operation that includes a cutting insert body, which has a seating surface, a flank face, and a corner cutting region at the intersection of a peripheral edge and the flank adjacent corresponding corners thereof. The cutting insert body contains a central aperture. The seating surface contains a coolant delivery trough, which has a radial orientation toward a corresponding corner cutting region. The coolant delivery trough has a radial outward end terminating at the peripheral edge and a radial inward end opening into the central aperture. There are a pair of lateral topographic regions wherein the one lateral topographic region is along one side of the coolant delivery trough and the other lateral topographic region is along other side of the coolant delivery trough.

Abstract: A cutting tool includes a tool body having a plurality of pockets for receiving cutting inserts. Each pocket includes a bottom support surface, an axial support surface, a radial support surface and a corner relief between the bottom support surface and the radial support surface. A non-circular recess is formed proximate the pocket, and a coolant passage is disposed within the recess.

Abstract: A toolholder has a head portion including a slot separating the head portion into a lower extension with a lower seat and an upper extension with an upper seat to retain a cutting insert. The head portion contains a coolant entrance passage, which receives coolant from a coolant source, and a coolant delivery passage, which discharges coolant toward a cutting insert. The cutting insert includes a top surface with an upwardly extending protuberance that can be engaged by the toolholder to rigidly mount the cutting insert in the head portion of the toolholder. The cutting insert further includes a coolant channel formed in the top surface of the cutting insert that is positioned directly opposite of the coolant discharge to enhance the flow rate of the coolant delivered to the cutting insert-workpiece interface.

Abstract: A cutting insert-shim assembly that has a cutting insert with a bottom surface and a plurality of interior coolant passages wherein each interior coolant passage has a coolant inlet in the bottom surface of the cutting insert. The shim has a first side surface and a second side surface and contains a cavity, which communicates with the coolant conduit. The cavity defines a first opening in the first side surface and a second opening in the second side surface. When the shim is in a first condition, the first side surface contacts the bottom surface of the cutting insert and the first opening provides a first level of coolant communication to the interior coolant passages in the cutting insert. When the shim is in a second condition, the second side surface contacts the bottom surface of the cutting insert and the second opening provides a second level of coolant communication to the interior coolant passages in the cutting insert.

Abstract: A cutting tool includes an insert defining a flank face, a rake face, and a cutting edge between the flank face and rake face. The cutting tool includes micro-nozzles formed in at least one of the tool body and the insert, and aimed at the cutting edge. Each micro-nozzle generates a micro jet of cutting fluid in close proximity to the cutting edge and adjacent to at least one of the flank face and the rake face.

Abstract: The description shows a chip breaker system for a drilling, turning, milling or reaming tool, wherein the chip breaker system comprises: a portion of a flute and a first area which is produced by a progressive cut, wherein a first edge is arranged between the portion and the first area in such a way that chips produced by a cutting movement of the drilling, turning, milling or reaming tool can be broken at the first edge. The application further relates to a high-speed reamer comprising such a chip breaker system, a reamer made of solid carbide, a reamer with axially extending cooling channels which are disposed in a decentralized manner, a reamer with cooling channels which are unevenly distributed in the peripheral direction, and a reamer with cooling channels, wherein the outlet openings of the cooling channels are arranged on different cutting planes.

Abstract: A tool holder includes: a shank portion gripped by a main shaft; a tool attachment portion having an insertion port into which a tool is inserted in a tip end surface thereof; a cover having a tubular wall that covers an outer periphery of the tool attachment portion and a bottom surface that covers the tip end surface of the tool attachment portion; a bearing provided between the tubular wall of the cover and the tool attachment portion; and a stopper that prevents the cover from co-rotating with the tool attachment portion. A through hole penetrated by the tool and an ejection port disposed on a periphery of the through hole in order to eject the coolant toward the tool are provided in the bottom surface of the cover.

Abstract: A method for bonding together components, such as a tip and a shaft which include mutually facing carbide end surfaces. The tip includes circumferentially spaced flutes formed in its cylindrical outer periphery. The shaft has a cylindrical outer periphery and a plurality of coolant holes extending through the shaft. Bonding of the tip to the shaft is performed by inserting gauge wires into the coolant holes and associated flutes, and positioning brazing material between the first and second end surfaces. A water-soluble bond-blocking material is applied to the gauge wires for preventing brazing of the gauge wires to the brazing material. The brazing material is heated to braze the first and second end surfaces together while the flutes and their associated coolant holes are maintained in alignment by the gauge wires. Then, the gauge wires are removed, and residual bond-blocking material is dissolved in water.

Abstract: A device (1) for machining by turning rotationally symmetrical surfaces (18, 20 or 22) of a workpiece (10), which is clamped and has a rotating drive, including a tool (12) having two cutting edges (16) and (17), each having an approximately helical shape, which are disposed one behind the other in the feed direction of the tool (12) such that after the machining by turning with the first cutting edge (16), a roughing edge, the second cutting edge (17), a finishing edge, comes into engagement.

Abstract: A cutting assembly useful for the chipforming removal of material from a workpiece at the cutting insert-workpiece interface. The cutting assembly has a holder with a coolant passage and a seat. As one option, a stud extends away from the seat and facilitates coolant flow to an insert locking cap, which attaches to the stud. The insert locking cap directs coolant flow toward the cutting insert-workpiece interface. As another option, a diverter plate has a bottom surface with a bowl and an arcuate forward surface with one or more openings. Coolant flows from the coolant passage into the bowl then exits through at least one opening in the arcuate forward surface towards the cutting insert-workpiece interface.