Abstract: The invention relates to a drilling tool with a base, having a central axis of rotation, and a drill bit, detachably connected to the base. The drill bit has a coupling part, which can be coupled with a coupling receptacle on the face of the base and has at least two convexly curved centring portions, which are arranged such that they are distributed over the circumference and engage with an exact fit in complementary concavely curved centring portions of the coupling receptacle. The coupling part has a complementary driver stop, meshing with a rotary driver of the coupling receptacle. It is claimed as novel that the centring portions of the coupling part and/or of the coupling receptacle have clamping surfaces, which run onto each other in the manner of a rotary wedge until the driver stop and the rotary driver come up against each other counter to a predetermined direction of rotation.

Abstract: A drill bit has a shank portion having a plurality of SDS-type slots, a cutting portion comprising at least one cutting flute, and an intermediate portion connecting the shank to the cutting portion, the intermediate portion including at least one longitudinal slot. A depth gauge includes a body configured to receive the drill bit, a retention mechanism coupled to the body and having an inward projection to removably couple the body to the at least one additional slot in the drill bit, and a cap coupled to the body such that the cap contacts a workpiece surface to prevent the drill bit from entering the workpiece more than a predetermined depth, wherein the cap is movable relative to the body among a plurality of positions, wherein each of the plurality of positions corresponds to a different predetermined drilling depth.

Abstract: A cutting head (14) for a T-slot cutter (10) includes opposing cutting head top and intermediate surfaces (18, 20) extending perpendicular to a head rotation axis (A), and a head peripheral surface (22) extending therebetween. The cutting head (14) also includes cutting portions (24) located along the head peripheral surface (22) and a head protrusion (32). The head protrusion (32) extends from the cutting head intermediate surface (20) and includes a head torque-transfer portion (42). The cutting head (14) further includes a cutting head abutment surface (34), and a head bore (36) coaxial with the head rotation axis (A). The head bore (36) extends between, and opens out to, the cutting head top surface (18) and the head protrusion (32). The cutting head (14) also includes a head centering portion (40) distinct from the head torque-transferring portion (42) and located at an axial position different therefrom, along the head rotation axis (A).

Abstract: A fluted drill has a drill body with a fluted drill cutting head removably secured thereto. The cutting head has two drilling portions facing axially opposite directions. In axial view, the cutting head has at least four through openings. Each drilling portion includes a plurality of head flute portions and a plurality of cutting head coupling portions.

Abstract: A cutting tool having a cutting head removably secured to a shank by frictional forces maintained between a male coupling member located in a female coupling member. Support surfaces of the male coupling member engage support walls of the female coupling member. The support surfaces lie on a common cylinder having a larger diameter than a common cylinder on which the support walls lie. The support walls are located on a circumferentially continuous bore wall of the female coupling member.

Abstract: A cutting burr that includes a pair of axially spaced diamond-shaped portions designed to be keyed into a spindle of a locking mechanism of a high speed surgical drilling instrument and adapted to fit into a single pawl thereof to lock said cutting burr in place so as to prevent axial movement thereof and provide concentric rotation of said cutting burr without any wobbling. The orientation of both portions may be identical with respect to a center plan and diamond shape in the portion at the proximal end of the shank of the cutting tool may be larger than the intermediately located diamond shape of the other portion. The apexes of the facets of the six-sided diamond shape may be disposed below the surface of the shank of the cutting burr.

Abstract: A drilling tool for the installation of elongate members in walls comprises an elongate hollow shaft. The shaft has a proximate end and a distal end, the proximate end is provided with means for connection to a drill and the distal end is provided with means for connection to a drill bit so shaped and dimensioned that the drill bit forms a hole of a diameter greater than the maximum diameter of the shaft. The shaft comprises an aperture located at the proximate end of the shaft and adjacent to the means for connection to a drill, and an aperture located at the distal end of the shaft and adjacent to the means for connection to a drill bit.

Abstract: A throw-away rotating tool improves workability of detaching a throw-away tip and prevents from damaging a body. In the throw-away tool, a convex connection for the throw-away tip has protrusions, each of the protrusion includes a sliding contact portion detachably fitted into the inner peripheral groove recessed in the inner peripheral wall of a body. The protrusion has a first tilt portion continuous to the sliding contact portion. In detaching the throw-away tip from the body, the first tilt portion rotates ahead of the sliding contact portion, and a standing portion is elastically deformed due to a wedge effect of the first tilt portion. As a result, the protrusion can be gently removed from the inner peripheral groove.

Abstract: A rotatable tool for chip removing machining, including a basic body having front and rear ends between which a first center axis (C1) extends around which the basic body is rotatable, and a loose top having front and rear ends between which a second center axis (C2) extends. The front end of the basic body includes a jaw which is delimited by two torque-transferring drivers and an intermediate bottom in which a part of the loose top is receivable, and a center hole that mouths in the bottom of the jaw and has a hole wall which extends axially inside the basic body and in which a threaded hole mouths for a screw to co-operate with a centering pin that protrudes axially rearward from the loose top, the centering pin being insertable into the center hole. The centering pin has a cross-sectional area that is less than a cross-sectional area of the center hole.

Abstract: A cutting tool has a cutting insert and a holder. The cutting insert has a cutting portion and an insert shank with a cylindrical portion and a non-cylindrical portion. The holder has a clamping portion which has a clamping sleeve and a cage located therein. The cage includes a load member housing with a load member. The cage has a major abutment wall adjacent to a minor abutment wall. The clamping sleeve has first and second inner sections defined by points P1 and P2. A point P3 divides the second inner section into first and second portions. The clamping sleeve is rotatable between a secured and a released position of the cutting tool. In the secured position, the non-cylindrical portion abuts the major abutment wall, the cylindrical portion abuts both the minor abutment wall and the load member, and the load member abuts the first portion.

Abstract: Embodiments of the present invention include composite articles comprising at least a first region and a second region and methods of making such articles. The first region may comprise a first composite material, wherein the first region comprises less than 5 wt. % cubic carbides by weight, and the second region may comprise a second composite material, wherein the second composite material differs from the first composite material in at least one characteristic. The composite article may additionally comprise at least one coolant channel. In certain embodiments, the first and second composite material may individually comprise hard particles in a binder, wherein the hard particles independently comprise at least one of a carbide, a nitride, a boride, a silicide, an oxide, and solid solutions thereof and the binder comprises at least one metal selected from cobalt, nickel, iron and alloys thereof.

Abstract: The thread generating tool for producing a thread in a workpiece has the following features: a) the tool is rotatable about a tool axis (A), b) the tool has a number n?1 of groove generating regions for generating in each case one groove in the workpiece and a number m?1 of thread generating regions for generating the thread in the workpiece, c) each of the m thread generating regions is arranged behind one of the n groove generating regions as viewed in an axial projection parallel to the tool axis (A), and has a smaller extent than said groove generating region as viewed in cross section in the axial projection.

Abstract: Deburring blade for deburring bore margins with an even or uneven shape, having a base body (1) which is rotatably driven about its longitudinal axis, in which base body at least one bar blade (3) is held exchangeably in a spring-loaded, swivelably mounted blade holder (2) in the base body (1) in a radial bar blade bore (7) of the blade holder (2), and the blade holder (2) is designed as an approximately cylindrical body, which is mounted rotatably in a bearing bore (6) of the base body (1).

Abstract: A reversible tool assembly includes a main member, a driven unit for driving the main member to rotate about an axis, first and second movable members coupled respectively to the main member and movable in the direction of the axis, and a reversible tool unit mounted pivotally between the first and second movable members. The reversible tool unit is movable together with the first and second movable members between an extended position, where pivot action thereof is permitted, and a retracted position, where pivot action thereof is not permitted.

Abstract: A method of installing cable through material, for example, concrete, wood, masonry, plastic steel, or the like comprising a drill bit with a distal end having a hollow tip with an attachment mechanism for receiving the cable. The drill bit is drilled through the material, and left in place while the cable is attached to the proximal end of the drill bit. There is no need to remove the drill bit from the aperture or material to attach the cable thereto. After attachment to the drill bit, the cable is inserted through the aperture with the drill bit and removed from the drill bit after it passes through the material so it can be attached to a receiver device.

Abstract: A metal cutting tool has a cutting head releasably mounted on a front end of a tool shank, in a self-clamping manner. The tool shank's forward end is provided with a pair of shank coupling portions, each having a forwardly facing shank support surface. A pocket recess is defined between the shank's coupling portions. Within the pocket recess are a plurality of shank fixation surfaces which are parallel to a longitudinal axis of the tool shank. The cutting head has a cap portion and a fixation portion extending in rearward direction therefrom. The cap portion includes a pair of head segments, each having a rearwardly facing head base surface. The cutting head's fixation portion has a plurality of head fixation surfaces which are parallel to a longitudinal axis of the cutting head.

Abstract: A drill bit for drilling holes in wood or the like has a spade cutting element, a thick elongate shaft and a shank adapted to be inserted into an SDS drill chuck. In a preferred embodiment, the shaft is provided with one or more ridges extending helically along most of its length, to strengthen and stiffen the shaft and to direct drilling debris away from the cutting element. The shaft has a diameter greater than or equal to that of the shank. The drill bit may be installed in and removed from the drill chuck more rapidly than conventional wood bits, is more robust and is more convenient and reliable in use.

Abstract: The present invention relates to a tool for machining workpieces, having a shank and a cutting part, wherein the cutting part has a cutting edge section that defines the nominal diameter of the tool, or an insert seat for a cutting insert, the seat having a cutting edge section that defines the nominal diameter of the tool, and wherein the tool has a rotational axis about which the tool rotates in the functionally mounted state.

Abstract: A cutting tool has a tool shank and a replaceable cutting head resiliently secured to the tool shank by an interference fit between a male fixation member of the cutting head and a female fixation member of the tool shank. The male fixation member has a resilience slit. In each cross section of the cutting tool taken perpendicular to an axis of rotation of the cutting tool through mutual abutment regions, the cross sectional profiles of the mutual abutment regions are arcuate sectors.

Abstract: A tool clamping mechanism connects a first member to a second member. The first member has a cylindrical stem with a coupling tooth projecting from the stem. The second member has a clamping cavity formed by the union of a gripping bore and an access hole. The access hole has an access bore and a tooth access hole formed to accommodate the stem and the coupling tooth respectively. The stem diameter of the stem is larger than the gripping bore diameter of the gripping bore. The clamping cavity further has a coupling recess for accommodating the coupling tooth. The coupling recess has a drive surface for engaging a driven surface located on the coupling tooth to create a force which pushes the stem from the access bore into the gripping bore and helps prevent separation of the two members.

Abstract: The invention relates to a tool holder with a tool holding fixture, in particular a clamping chuck such as a contracting chuck, a draw-in collect chuck, a hydraulic expanding chuck and a high-precision chuck, and a shank of a tool, in particular a rotary tool, accommodated in it, wherein the tool holder contains a means for preventing the tool from being pulled out, locking it against axial displacement. This pull-out preventing unit comprises at least one locking element and at least one locking groove, which corresponds to the said locking element, receives it and interacts with it in a positively locking manner. In this case, both the locking element and the locking groove are formed at least partly in the manner of a ball head. Preferably, the tool has the locking grooves.

Abstract: A rotary tool extends in the direction of an axis of rotation and includes a carrier having a coupling receptacle disposed at an end face, the carrier having a carrier cross section. The coupling receptacle is delimited in the entire region of the carrier cross section by an outer web having an end face forming a planar bearing area. The coupling receptacle is delimited by side walls which extend step-free from the bearing area to a bottom area and include a pair of opposing clamping segments extending in the circumferential direction and a pair of opposing torque segments arranged at an angle thereto. The tool also includes a cutting head exchangeably fastened to the carrier, the cutting head having a coupling pin disposed in the coupling receptacle. At least one of the pairs of segments is oriented inclined in relation to the axis of rotation.

Abstract: A cutter-tooling assembly has a tool holder and a cutter. The tool holder has an inserted section and a through hole axially formed through the inserted section. The through hole has a fixing segment. The fixing segment has an inner surface and multiple recesses formed around the inner surface of the fixing segment at intervals. The cutter is inserted into the through hole of the tool holder and has a fixing end. The fixing end has an outer surface and multiple corners formed on the outer surface of the fixing end and abutting the recesses. Because the fixing segment has the multiple recesses which the corners of the cutter abut, the combination of the recesses and the corners can prevent a relative rotation between the tool holder and the cutter and make the cutter securely connected with the tool holder.

Abstract: A cutting tool assembly for boring and internal grooving operations includes a tool head having a removably secured cutting insert at a forward insert receiving end and a rear mating end with a male or female type tool holder coupler in the form of an engagement protrusion or cutting holder receiving pocket. The tool head is fixed to a tool holder with a front mating end having a female or male tool head coupler in the form of a tool head receiving pocket or engagement protrusion. Following assembly, at least three abutting wall surfaces and an adjacent support surface of the tool holder coupler are in contact with at least three non-coplanar abutment surfaces and an adjacent supporting surface of the tool head coupler, respectively, and a fastening screw member extends through a through bore in the tool holder coupler engaging a threaded screw bore in the tool head coupler.

Abstract: A cutting tool has a cutting head and a shank. The cutting head has a body, a head threaded portion, a first helical head surface and a second helical head surface. The shank has a cylindrical portion, a shank threaded portion, a first helical contact surface and a second helical contact surface. The head threaded portion screw-engages the shank threaded portion. The first helical head surface is parallel to the thread of the head threaded portion and the first helical contact surface is parallel to the thread of the shank threaded portion. The second helical head surface and the second helical contact surface are inclined reversely to the first helical head surface and the first helical contact surface, respectively. The first helical head surface comes into surface contact with the first helical contact surface. The second helical head surface comes into surface contact with the second helical contact surface.

Abstract: A cutting tool including a body, a blade, a feed shaft, and a locking member. The body defines an axis and is adapted to be received by a spindle of a power tool. The blade is removably supportable on the body and rotatable about the axis for cutting a workpiece. A feed shaft is removably supportable in the body and rotatable about the axis for engaging a workpiece, the feed shaft being mountable in the cutting tool to engage and at least partially restrain the blade. The feed shaft further includes an opening transverse to the axis. The locking member is engageable with the body and with the opening in the feed shaft. Advancement of the locking member into the opening tightens both the blade and the feed shaft to the body.

Abstract: A cutting tool has a cutting insert and a holder. The cutting insert has a cutting portion and an insert shank with a cylindrical portion and a non-cylindrical portion. The holder has a clamping portion which has a clamping sleeve and a cage located therein. The cage includes a load member housing with a load member. The cage has a major abutment wall connected to a minor abutment wall. The clamping sleeve has first and second inner sections defined by points P1 and P2. A point P3 divides the second inner section into first and second portions. The clamping sleeve is rotatable between a secured and a released position of the cutting tool. In the secured position, the non-cylindrical portion abuts the major abutment wall, the cylindrical portion abuts both the minor abutment wall and the load member, and the load member abuts the first portion.

Abstract: A rotatable tool for chip removing machining including a basic body and a loose top; the body includes two torque-transferring drivers and an intermediate bottom in which a rear coupling part of the loose top is receivable, and a center hole that mouths in the intermediate bottom. A centric pin is insertable into the center hole, and a screw is accessible from the outside of the basic body. The coupling part includes a pair of side contact surfaces which cooperate with a pair of side support surfaces on the drivers of the basic body for the transfer of torque and negative axial forces between the coupling part and the drivers.

Abstract: An object is to provide a rotary tool and the like, in which an occurrence of plastic deformation is suppressed even when a great rotational torque is exerted. A rotary tool B includes a cutting part 14 at its distal end portion and a shank 11 at its proximal end portion. The cutting part 14 has cutting edges that are arranged in a manner to face forward, and the shank 11 is to be inserted and attached into an insertion hole 1 of an arbor A. The shank 11 includes: engagement recesses 15 which come into engagement with locking members 2 which are provided in the arbor in such a manner as to be protrudable inwardly from the insertion hole 1; and passage recesses 18 which allow the locking members to be guided into the engagement recesses 15. The rotary tool B is configured such that falling off of the rotary tool B from the arbor A is prevented. A groove 16 is formed in the shank 11 at a portion where an engagement recess 15 is either formed or not formed.

Abstract: A tool for rotary cutting machining includes a tool body and a replaceable cutting head detachably attachable to the tool body. The cutting head has a coupling portion which is receivable in a space between two axially projecting coupling legs of the tool body. Cylindrical internal gripping surfaces are arranged in said space and designed for engagement with corresponding cylindrical external gripping surfaces of the cutting head. The gripping surfaces of the cutting head and the gripping surfaces of the tool body are dimensioned so as to prevent, by engagement with each other, the cutting head from being displaced in axial direction away from the tool body when the cutting head is attached to the tool body. A tool body and a cutting head included in such a tool are also disclosed.

Abstract: A machining tool includes a holder and a cutting head which can be screwed into the holder. The cutting head includes a cutting-edge region and a coupling region. The coupling region includes a flat contact area facing the holder, a cylindrical thread carrier with an external thread adjoining the flat contact area, and a clamping cone adjoining the thread carrier. The holder includes a planar counter-contact area disposed adjacent the flat contact area of the coupling region, a cylindrical internal thread adjoining the planar counter-contact area, and a hollow-conical cone contact area next to the internal thread.

Abstract: A drill includes a tool body having a fluted portion having a second end and a tool head portion, having a cutting tip and at least one cutting edge, removably connected to the second end of the fluted portion. The fluted portion includes a receiving pocket disposed in the second end and is defined by a peripheral side wall extending about the periphery of the receiving pocket. The tool head portion includes a driving projection configured to be inserted into the receiving pocket. The driving projection and receiving pocket have corresponding elongated, curvilinear, dog-bone shapes. The driving projection includes a first end portion, a second end portion, and a central portion disposed between connecting the first end portion and the second end portion. The first end portion and the second end portion each have a width that is substantially greater than a width of the central portion.

Abstract: A rotary cutting tool that is composed of a tool shank with at least one chucking groove or chip flute and one exchangeable cutting insert. At the tip of the shank a recess for accommodating the cutting insert is provided. The tool shank, on its circumference, has a limb with a bearing surface that is inclined relative to the tool axis and that corresponds to a likewise inclined bearing surface on a wing of the cutting insert. The inclination of the bearing surfaces produces an axial force that retains the cutting insert on the tool shank.

Abstract: A throw-away rotating tool includes at least two grooved portions 13b, 13c formed on each of erected portions 13 and at least two protrusions 26, 27 for fitting into and removal from respective grooved portions 13b, 13c and projected from a projecting coupling portion 23, and the grooved portions 13b, 13c are formed asymmetrically about an axis O and the protrusions 26, 27 are formed asymmetrically about the axis. Thus, the direction in which the projecting coupling portion 23 can be coupled to the erected portions 13 is uniquely determined. Consequently, variations in lip height and run-out can be minimized. As a result, occurrence of a bend and an increase in machined hole diameter during drilling can be prevented, thereby making it possible to minimize variations in machining accuracy and tool life.

Abstract: A drill bit or boring tool having cutting edge that includes a pair of generally smooth curvilinear shaped portions that are positioned near the radial outer portions of the cutting edge and connected to one another by a pair of generally linear portions that traverse the longitudinal centerline of the tool.

Abstract: Rotatable drilling tool has an insert top detachably connectable to a basic body and at least one chip flute. In each cross-section, each chip flute has a depth equal to the difference between the radius of a cutting circle and a radius of a greatest possible core circle centered on the longitudinal axis and tangential to a limiting curve of the respective chip flute. The basic body is divided longitudinally into a coupling segment, extending axially rearward from a coupling end, and a transportation segment that is situated axially behind the coupling segment, extends rearward toward a fixing end, and is longer than the coupling segment. Each chip flute extends through the coupling segment and the transportation segment. At least essentially the entire female part is situated in the coupling segment, and each chip flute has a smaller depth in the coupling segment than in the transportation segment.

Abstract: A drill wrench for driving drill steels, drill bits, and bolts during drilling and bolting operations is disclosed. The drill wrench may include an internal driver for driving a drill steel. The internal driver may be inserted in an internal-drive recess defined within an end of the drill steel. When the drill wrench is rotated, the internal driver may drive the drill steel by engaging at least one surface within the end of the drill steel. The drill wrench may also include an external support member that supports the drill steel during drilling. The external support member may also drive the drill steel by engaging an outer peripheral portion of the drill steel when the drill wrench is rotated.

Abstract: A machine tool bit, such as a tool for drilling, milling, reaming or tapping or the like comprising a work portion (71) and a shank (73) extending from the work portion. The shank (73) is provided with one or more regions of reduced mechanical torque strength. Such regions can be for example, a reduced diameter (74), axial or longitudinal slots (84, 114), reduced cross sectional area (97), bores (94), annular notch or groove (63, 65), or a slot. The shank is preferably constructed with these features such that the transverse stability of the tool bit is greater than a machine tool bit in which an equivalent reduction in mechanical torque strength is achieved by a mere reduction in diameter of the shank. Technically, the Polar moment of inertia (resistance to torsion) of the modified shank is greater than the polar moment of inertia of a shank with a mere reduction in diameter of the shank.

Abstract: A tool system having at least two tool parts with opposed end contact surfaces which bear against one another in the region of an interface. The contact surfaces have a tooth system thereon including intermeshing teeth and recesses. The tooth system is shaped and positioned such that the contact surfaces can be fitted together only in at least one defined rotary angle position with respect to the center axis of the tool parts.

Abstract: A cutting tool, and a loose top therefore, includes two parts detachably connected to each other via a threaded joint in which co-operating male and female threads are included in the form of helicoidal ridges. The profile shape of each helicoidal ridge is defined by a top and two flanks, which delimit a helicoidal groove having a bottom. The first flank is inclined in relation to a center axis of the tool at a first angle that is smaller than a second angle of the second flank in relation to the center axis. Accordingly, the thread ridge is reinforced in comparison with thread ridges having a symmetrical profile shape, whereby larger tensile forces than compressive forces can be applied to the threaded joint while avoiding damage to the thread ridges.

Abstract: A tool bit for a chisel or a hammer drill, in particular, a insertable chisel or insertable drill for power-driven drill and chisel hammers, has an insertion end, with a chisel shank or drill shank, and a chisel head or drill shank located opposite the insertion end. The diameter of the shank increases in the direction of the chisel head at least once from a first, small diameter to a second, large diameter and decreases again from this to a small diameter or forms at least one bead.

Abstract: A hand-held water drill system including a drill coupled to a shank to transmit torque to a drill bit. A solution delivery device substantially surrounding the shank provides solution to the drill bit. The shank freely rotates within the solution delivery device. The solution delivery device includes a handle having a channel. A solution delivery control is provided to operate the valve to allow flow control of the solution to the drill bit distal end while allowing the user to maintain a grip on the handle. Additionally, the solution delivery device is positioned and constructed to provide improved control of the position of the drill bit during use.

Abstract: A cutting tool assembly having a tool holder and a cutting tool. The cutting tool has a shank that is matingly received within an axial bore in the lower end of the tool holder. The shank includes an eccentrically-shaped driver portion. The tool holder's axial bore includes an enlarged eccentrically-shaped drive opening which is complementary in shape to, but slightly larger than, the driver portion. When the shank is inserted into the axial bore, the driver portion and drive opening are aligned allowing the cutting tool to be partially rotated relative to the tool holder. This partial rotation abuts a portion of the eccentric driver portion against the drive opening wall to provide rigid support of the cutting tool against further rotation as the tool assembly cuts. A cammed fastener releasably interlocks the partially rotated cutting tool within the tool holder.

Abstract: A spiral fluted tap is provided which includes a threaded portion having an external thread corresponding to an internal thread to be cut and a cutting edge formed along a spiral flute formed to divide the external thread, and being screwed into a prepared hole that is provided on a workpiece to cut an internal thread by the cutting edge on an inner circumferential surface of the prepared hole with discharging chips toward a shank via the spiral flute, the spiral flute having a stepped portion at a rear end of a chamfer portion or in a portion on a shank side from the rear end of the chamfer portion in the threaded portion, and a flute bottom diameter on a distal end side of the spiral fluted tap from the stepped portion being smaller than a flute bottom diameter on a shank side from the stepped portion.

Abstract: A bevel head replaceable rotary tool is provided. The rotary tool includes a coupling protrusion and a coupling recess, plural sets of serrations provided on an outer circumferential surface of the coupling protrusion and an inner wall surface of the coupling recess, circumferential abutting portions provided on the tool body and the bevel head, and axial tight-contact portions, provided on the tool body and the bevel head. The serrations of the coupling protrusion and the serrations of the coupling recess arranged such that curvatures of circumferential circular arcs of the serrations of the coupling protrusion are greater than those of the serrations of the coupling recess or the serrations of the coupling protrusion and the serrations of the coupling recess have circumferential circular arcs with centers deviated from each other.

Abstract: A cutting tool having a cutting head removably secured to a shank by frictional forces maintained between a male coupling member located in a female coupling member. Support surfaces of the male coupling member engage support walls of the female coupling member. The support surfaces lie on a common cylinder having a larger diameter than a common cylinder on which the support walls lie. The support walls are located on a circumferentially continuous bore wall of the female coupling member.

Abstract: A tool for rotary cutting machining includes a tool body and a replaceable cutting head detachably attachable to the tool body. At its front end, the tool body is provide with two coupling legs projecting in an axial direction. The respective coupling leg is provided with a stop surface for transferring torque from the tool body to the cutting head, which stop surface is designed for abutment against a corresponding stop surface of the cutting head. The respective coupling leg is provided with a shoulder protruding from the stop surface of the coupling leg.

Abstract: The invention relates to a drilling tool (1) comprising a support shank (2) and an interchangeable cutting insert (3) which is fitted to the support shank (2) and which has an asymmetrical main lip (15) divided into a guide lip (10) having a supporting land (12) and a guide land (23) trailing the supporting land (12), and into a clearance lip (13) having a trailing clearance portion (14), wherein a guide land (28) and a supporting land (29) are formed on the lateral surface of the support shank (2) and continuously extend the guide land (23) and the supporting land (12), respectively, on the cutting insert (3) and additionally guide the drilling tool (1) on the inner wall of a drill hole during a drilling operation.

Abstract: A drill bit includes a shank at a first end of the drill bit, a boring head at a second end of the drill bit opposite the first end, and a wrenching section between the shank and the boring head. The wrenching section has a substantially different cross-section than any portion of the shank or the boring head. The wrenching section includes at least one pair of flat surfaces that are parallel to one another. In some embodiments, the wrenching section has a square or hexagonal cross section. A drill motor grips the shank for boring a hole in a workpiece. In some embodiments, the shank is cylindrical or splined, or is configured as an SDS shank, an SDS-plus shank, an SDS-Top shank, an SDS-max shank, or a Morse taper shank. A wrench is applied to the wrenching section to free the drill bit from the workpiece if jammed.

Abstract: A metal cutting tool has a cutting head releasably mounted on a front end of a tool shank, in a self-clamping manner. The tool shank's forward end is provided with a pair of shank coupling portions, each having a forwardly facing shank support surface. A pocket recess is defined between the shank's coupling portions. Within the pocket recess are a plurality of shank fixation surfaces which are parallel to a longitudinal axis of the tool shank. The cutting head has a cap portion and a fixation portion extending in rearward direction therefrom. The cap portion includes a pair of head segments, each having a rearwardly facing head base surface. The cutting head's fixation portion has a plurality of head fixation surfaces which are parallel to a longitudinal axis of the cutting head.