Abstract: Disclosed is a high-precision wheel cap section burr removing device, including a frame, jacking cylinders, guide posts, a servo motor, a lifting table, a bearing seat, a shaft, a bearing, a rotating table, adjusting guide rails, an adjusting cylinder, a left sliding table, a gear rack, a right sliding table, pre-positioning cylinders, pre-positioning guide rails, a sliding plate I, a sliding plate II, pre-positioning posts, corner cylinder pressure claws, a left burr cutter and a right burr cutter. The precision positioning system and the burr removing cutter system are integrated to reduce the combined error, and the rotating centers of the burr cutters are superposed with the central axes of the cap section burrs to realize high-precision burr removal, thereby effectively solving the problems of deviation and non-uniformity of burr removal at the cap section.

Abstract: A drill head insert or drill head attachment, in particular a drill plate made of hard metal, for a rock drill, includes cutting edges (20, 20a) configured on the feed side which extend from a tip of the drill (18) rearward in a receding manner to an outer face (12, 14) of the drill plate (10). A drill plate (10) is substantially configured in the form of a roof when viewed from the side. A free face (24, 24a) at the cutting edge (20, 20a) abuts against a cutting face (22, 22a) along a substantial part of its extension between the tip of the drill (18) and the outer face (12, 14). A substantially smooth contour of the cutting edge (20, 20a) is interrupted by at least one projection (30, 30a, 30b) which projects beyond the cutting edge (20, 20a) in the feed direction.

Abstract: A rotary cutting tool includes a cutter body having a head, a shank, and a cavity extending along a central, longitudinal axis of the cutter body. The head includes at least one cutting insert mounted in a pocket adjacent to a chip groove. A stiffening device includes a plurality of slugs with high compressive strength disposed within the cavity, and a first compression screw threaded into a rearward end of the cutting tool. In another embodiment, a second compression screw is threaded into a forward end of the cutter body. In another embodiment, each slug includes a coolant hole, circumferential grooves and axial grooves on its outer diameter, and a plurality of radial grooves on each end, and the first compression screw has a coolant hole for allowing coolant to pass therethrough.

Abstract: A quick-change attachment configuration is directed to a tool for use with a hole saw for boring holes on a wooden plank, particularly the quick-change attachment configuration is arranged for quickly replacing a longitudinal body, which is a drill bit shank having a driving end, a tool end, and a limiting portion. The configuration includes a quick-change attachment for assembling a longitudinal body and a hole saw which has an axial hole for allowing a longitudinal body to move on the quick-change attachment, and a locking component for locking and releasing the longitudinal body on and from the quick-change attachment. The locking component has a first component and a second component, which when used, the longitudinal body is easily moved slidably and locked so the shreddings emerging from the hole saw are cleaned.

Abstract: A high-tolerance molding device that uses a pulling technique to quickly form a desired elongated hole in a workpiece such as a pipe or a sheet with little material loss, due to the use of single-piece molding, while preventing material degradation. The workpiece is provided with a pilot hole that is smaller than but roughly concentric with the desired elongated hole. This molding device includes a power-coupling arm that can be inserted into the pilot hole; a control unit that controls the movement of the power-coupling arm; and a molding plug that is prepositioned on the opposite side, with respect to the power-coupling arm, of the surface of the workpiece in which the pilot hole is provided.

Abstract: A drill bit which is rotatable about a drilling axis is disclosed. The drill bit has a cutting section having one or more cutting segments and a first plug-connecting element and a drill shaft section having a second plug-connecting element. The first plug-connecting element and the second plug-connecting element form a plug connection and the first plug-connecting element and the second plug-connecting element are connectable by a pin connection.

Abstract: A replaceable cutting head stably rotates a head body using a work tool during attachment. An outer periphery of the head body is provided with a plurality of chip discharge grooves extending along a direction of an axis, cutting blades extending along the chip discharge grooves, and a pair of latching faces that are formed by cutting the outer periphery of the head body and are arranged back to back with the axis interposed therebetween at a base end portion along the axial direction. A first chip discharge groove, and a second chip discharge groove having a narrower width along a circumferential direction around the axis than the first chip discharge groove at at least the base end portion along the direction of the axis are included in the chip discharge grooves. At least one latching face is connected to a base end portion of the second chip discharge groove.

Abstract: Reaming tool includes a head and one or more detachable cutting inserts fixed in seats. The seat includes radial, tangential and axial support surfaces, while the cutting insert has a mirror-symmetrical polyhedron shape comprising six limiting surfaces, viz. two chip surfaces and four clearance surfaces, a number of alternately usable identical cutting edges formed in the transitions between the chip and clearance surfaces. The cutting insert has a rhombic cross-sectional shape with four clearance surfaces, which meet each other in pairs at obtuse angles in two opposite corners, and which, along each individual chip surface, form two cutting edges alternately usable by indexing the cutting insert. The seat additionally includes a slope surface forming an obtuse angle with the radial support surface, suitably of the same magnitude as the obtuse angle between the clearance surfaces of the cutting insert. Tool head and reaming insert for the tool are disclosed.

Abstract: A support pad intended for metal machining drills and of the type that includes an outer surface, an inner surface, front and rear end surfaces, as well as a pair of spaced-apart side surfaces, between the outer surface and at least the front end surface a convexly arched entering surface being formed that extends between, on one hand, a pair of front and rear borderlines, the rear one of which borders the outer surface, and, on the other hand, two tangentially spaced-apart side borderlines. The rear borderline of the entering surface has the shape of a convex arc line as viewed in planar view toward the outer surface, more precisely an arc line the crest of which is facing forward. In such a way, the position of the contact of the support pad with a hole wall can be predetermined in an exact way. The drill body may be equipped with one or more support pads.

Abstract: Reaming tool includes a head and a detachable cutting insert fixed in a seat. The seat includes radial, tangential, and axial support surfaces, while the cutting insert has a mirror-symmetrical polyhedron shape comprising six limiting surfaces, viz. two chip surfaces and at least two clearance surfaces, a number of alternately usable, identical cutting edges formed in transitions between the chip and clearance surfaces. A female- or male-like securing means co-operates with a complementary, male- or female-like securing means in the seat, more precisely in an inactive, contactless state as long as the cutting insert is held pressed by the cutting forces against the axial support surface. The securing means is activatable when the cutting insert is unintentionally distanced from the axial support surface against the action of a clamping member. Tool head and reaming insert for the tool are disclosed.

Abstract: A cutting tool has a cutting insert secured in a tool shank by means of a clamping bolt, whereby two opposing side surfaces of a body portion of the cutting insert are located between two spaced apart protuberances of the tool shank. The body portion includes a cut-out extending between the two opposing side surfaces and opening out to a bottom surface. The cut-out includes an undercut with at least one undercut sub-surface with respect to a forward direction. The clamping bolt can be rotated from a locked position wherein the bolt shank has a threaded portion engaged in one of the protuberances and a bolt locking portion located directly forward of the at least one undercut sub-surface, to an un-locked position wherein the threaded portion remains engaged in the protuberance and no portion of the bolt shank is located directly forward of the at least one undercut sub-surface.

Abstract: A rotary cutting tool includes a replaceable cutting tip having a cutting portion structured to perform cutting operations on a workpiece and a first threaded portion disposed generally opposite the cutting portion. The cutting tool further includes a generally cylindrical tool body disposed about a central longitudinal axis. The tool body has a first end portion adapted to be coupled to a machine tool and an opposite second end portion having a second threaded portion cooperatively engaged to the first threaded portion. The second threaded portion is moveable with respect to the tool body in a manner that selectively couples the cutting tip to the tool body.

Abstract: A thread repair tool comprises a support, a removable cutter, and a clamp for holding the cutter in position. The support can be provided with a leg supporting the cutter. The inner surface of the leg and the inner surface of the cutter can be tapered so that moving the cutter away from the head of the support can change the cutting diameter.

Abstract: The present disclosure relates to a drilling tool, more particularly to drill insert of trigon shape with plurality of cutting edges. The indexable drill insert (1) having trigon shape, comprising an upper side (1b) and lower side (1c), parallel to each other, characterized in that, a mounting hole (1a) at center of the drill insert (1), enabling the indexable insert (1) to be mounted on both upper side (1b) and lower side (1c) of the insert (1); and plurality of cutting edges (1d) on each side of the insert (1).

Abstract: The invention relates to a drilling tool comprising a clamping shaft and cutting element contiguous with said clamping shaft. The cutting element comprises at least one flute having a flute surface that has a concave cross-section. The at least one flute has a cut-in section in the chip-forming zone adjacent to the main cutting edge in the area of the flute front and/or the back segment to enlarge the flute cross-section.

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: The present invention provides a new drilling tool useful in machining hydraulic port seals for fluid power ports. The drilling tool drills the port hole to size in a solid material for the minor thread diameter in combination with forming the port in a single operation. The drilling tool has a tool holder having a rotational axis, a first drilling insert having cutting surfaces on a first side and a mounting surface on a second side, at least one second drilling insert having a predetermined cutting surface portion and a mounting portion which is mounted on the holder at a location from the rotational axis of the holder. The at least one second drilling insert has first and second portions which engage and machine a work piece in a drilling operation to form a spot face and a seal form.

Abstract: Apparatus and methods for positioning one or more components relative to a work surface are provided. The apparatus can include a frame having a first support member extending therefrom. At least one extendable member can be disposed on the first support member. The extendable member can be adapted to move in a linear direction. At least one magnet can be disposed on the frame. The magnet can include at least one contact side that can be switchable between a magnetized state and a non-magnetized state.

Abstract: A quadrangular indexable drill insert includes: a top surface, a bottom surface, a side surface adjoining the top and bottom surfaces from four sides of the insert, four cutting edges configured at the intersection of the side surface and the top surface, and a screw hole disposed at the center of the insert. Each cutting edge includes: a first part edge; a second part edge extending from the first part edge; a third part edge extends away from a reference axis, a nose portion adjoins the first part edge with the third part edge of a succeeding cutting edge and a transitional edge joining the second and third part edges. The transitional part edge forms an angle of about 10° to about 90° with respect to the reference axis and forms a convex curve with the second part edge and a concave curve with the third part edge.

Abstract: A quadrangular indexable drill insert includes a substantially flat top and bottom surfaces, a side surface adjoining the top and bottom surfaces, four identical cutting edges of the side surface intersecting the top surface, a through hole extending between the top and bottom surfaces, and a chamfer provided at the bottom edge of the drill insert. Each cutting edge includes a first part edge; a second part edge extending from the first part edge; a third part edge extending away from the central axis, the second and third part edges being joined together by a transition part edge having a concave curved portion and a convex curved portion; and a curved nose portion of predetermined radius disposed at a corner of the insert adjoining the first part edge of one cutting edge with the third part edge of a succeeding cutting edge of the four identical cutting edges.

Abstract: Described is a multi-blade cutting and drilling finishing tool, in particular a reamer, for machining deep, especially stepped bores. Said tool comprises a set of blades having a predetermined nominal diameter and blades that are distributed in a substantially regular manner along the circumference. In order to make it easier to guide the tool along the central axis, a set of guiding strips in the form of very accurately placed and preferably cylindrically ground cutting inserts is located behind the set of blades in the advancing direction. Each of said cutting inserts is axially flush with the blades of the adjacent set of blades in the advancing direction of the tool and has a nominal diameter which is smaller than the nominal diameter of the set of blades substantially by twice the size of a lubrication gap forming when the tool is used.

Abstract: A multiply indexable cutting insert for a drilling tool includes a body defined by two plane-parallel outside faces disposed perpendicular to an insert axis. Each outside face includes a plurality of edges defining a substantially triangular outer contour. Each edge includes a respective main cutting edge extending substantially over the entire length of the respective edge. The body has a rotational symmetry in respect of a 120° rotation about the insert axis and a rotational symmetry in respect of a 180° rotation transversely in relation to the insert axis.

Abstract: A cutting tool holder configured for mounting a cutting insert to form a cutting tool that extends along a central axis and comprises a mounting portion having a seat surface oriented generally perpendicular to the central axis. The tool holder has at least two securing extensions projecting from the seat surface in a direction generally parallel to the central axis. Each of the extensions are formed, at an end remote from the seat surface with a latch portion extending towards the central axis. The latch portion has an under and top surface, both oriented generally transversely to the central axis such that the under surface is disposed between the seat surface and the top surface. Each of the extensions is formed with a side surface extending between the under and side surfaces to form a securing pocket defined between the seat, side, and under surfaces.

Abstract: A cutting insert for use in a drilling tool includes two end faces disposed perpendicular to an insert axis and a plurality of side walls connecting the end faces. Supporting surfaces for bearing against corresponding mating supporting surfaces of a cutting insert receptacle of the drilling tool are formed on at least two of the side walls arranged in a rear region of the cutting insert. A main lip for machining a workpiece to be drilled is formed on at least one side wall arranged in a front region of the cutting insert. The side walls having the supporting surfaces are arranged in such a way that the cutting insert can be inserted into a trigon cutting insert receptacle in an accurately fitting manner.

Abstract: A slide mechanism comprises a main plate forming two guiding groove portions, and a slide plate forming two guiding flanges engaging with the guiding groove portions respectively. The slide mechanism includes a plurality of rollers received in the guiding groove portions to guide the guiding flanges to slide relative to the guiding groove portions. The invention also discloses a portable electronic device applying the slide mechanism.

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 23 for the throw-away tip 20 has protrusions 25, each of the protrusion includes a sliding contact portion 25a detachably fitted into the inner peripheral groove recessed in the inner peripheral wall of a body. The protrusion 25 has a first tilt portion 25b continuous to the sliding contact portion 25a. In detaching the throw-away tip 20 from the body, the first tilt portion 25b rotates ahead of the sliding contact portion 25a, and a standing portion is elastically deformed due to a wedge effect of the first tilt portion 25b. As a result, the protrusion 25 can be gently removed from the inner peripheral groove 13b.

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: The invention relates to a deep hole drill comprising at least one cutter (S), which is formed on a drill head and which has at least one cutting edge, the at least one cutter being divided into at least two sub-cutters (T1, T2) by at least one chip divider (ST) for dividing the chips removed by the cutting edge, the deep hole drill being characterized in that the sub-cutters (T1, T2) of at least one cutter are arranged relative to each other in such a way that the cutter normals (N1, N2) of at least two sub-cutters (T1, T2) are aligned at an angle of at least 20° to each other.

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 throw-away rotating tool includes plural protrusions 24a formed in a part of an outer peripheral wall 24 of a projecting coupling portion 23. Since the twist angle and a twist direction of the protrusions 24a are set in such a way that with relative rotation when coupling the projecting coupling portion 23 and erected portions 13 together, due to the reaction force received by the protrusions 24a from inner peripheral walls 13a, the projecting coupling portion 23 is pulled to the rear and side of the erected portions 13 and the projecting coupling portion 23 is stably held between the erected portions 13. Since the number of portions that require stringent dimension control and high machining accuracy can be reduced, productivity can be improved.

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: An indexable drill includes an insert attachment seat and a chip discharging groove formed so as to extend from a leading end surface to a trailing end side of the drill in the direction of the axis of rotation and through which chips generated by the cutting insert are discharged, and in that a wall surface defining the chip discharging groove at least partly includes a smoothed surface with a surface roughness of at most 0.5 ?m in terms of arithmetic average roughness Ra, the wall surface of the chip discharging groove is partly formed on a thinned wall portion thinned by the central edge attachment seat and the outer peripheral edge attachment seat, and a crossing portion between the first wall surface and the second wall surface in the thinned wall portion is rounded.

Abstract: A drill body of an indexable drill includes: a chip discharging groove which discharges chips produced by a cutting insert on a wall surface defining the chip discharging groove; and an insert attachment seat on which the cutting insert formed in a front end side, in a rotational axis direction, of a first wall surface of the chip discharging groove that faces a drill rotation direction is detachably mounted. A chip formation portion is formed which includes at least any of a plurality of protruding portions that protrudes outward from a second wall surface and a plurality of concave portions that is concave inward from the second wall surface, at least in a front end portion of the second wall surface of the chip discharging groove that faces a rear side of the drill rotation direction.

Abstract: A rotary cutting tool has a shank and an interchangeable cutting tip which can be coupled to the shank. The shank has a locking geometry having an undercut into which a locking projection of the cutting tip projects. Numerous lateral supporting surfaces and supporting counter-surfaces are provided for laterally fixing the cutting tip in the shank.

Abstract: The invention relates to a drill tip (2) comprising a base body (6) having chip flutes (22A,B) and extending in the axial direction along an axis of rotation (8) and having at least two main cutting edges (14A,B) on the front face thereof extending outward in the radial direction to a cutting corner (16A,B). Seen in cross section, the base body is asymmetric relative to rotation about the axis of rotation (8) at the height of the cutting corner (16A,B). The cross section of the base body is simultaneously designed having symmetrical spacing from the main cutting edges (14A,B). The drill tip (2) is in particular designed as an interchangeable modular part of a modularly designed drill tip (5). A drill base body (4) in which the drill tip (2) can be inserted can therefore in turn be designed symmetrically.

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: The present invention provides a new drilling tool useful in machining hydraulic port seals for fluid power ports. The drilling tool drills the port hole to size in a solid material for the minor thread diameter in combination with forming the port in a single operation. The drilling tool has a tool holder having a rotational axis, a first drilling insert having cutting surfaces on a first side and a mounting surface on a second side, at least one second drilling insert having a predetermined cutting surface portion and a mounting portion which is mounted on the holder at a location from the rotational axis of the holder. The at least one second drilling insert has first and second portions which engage and machine a work piece in a drilling operation to form a spot face and a seal form.

Abstract: A tool element for cutting a workpiece includes a body including a shank for connecting the tool element to a power tool, a first cutting portion formed as part of the body and defining a first removing pattern, and a cutting element removably coupled to the body and including a second cutting portion defining a second removing pattern, the second removing pattern being a substantial continuation of the first removing pattern.

Abstract: The present invention provides a cutting tool which comprising a drill bit having an integrated deburring tool or tip which is displaceable between an extended and retracted position in order to enable both drilling and deburring operations to be carried out using a single tool, and which incorporates a number of features to increase the speed at which the deburring tip extends and retracts.

Abstract: A rotatable tool for chip removing machining, including a basic body having front and rear ends between which a first center axis extends with which an envelope surface is concentric, the front end including a jaw delimited by two torque-transferring drivers and an intermediate bottom in which a center hole extending axially inside the basic body mouths, and a bore for a locking screw extending radially between the center hole and the envelope surface. A loose top has front and rear ends between which a second center axis extends, in the extension of which a pin protruding from the rear end extends that is delimited by a free end surface and an envelope surface in which a shoulder surface is included for the locking screw arranged in the radial bore.

Abstract: A boring tool has a receiving part implemented as a borer body and a front part implemented as a borer head, which extend along a central axis and can be removably fastened to one another via driver connection. The driver connection has at least two coupling pairs which are separate from one another and are disposed eccentrically relative to the central axis. Each coupling pair is formed by interlocking coupling elements, namely a receiving pocket and a driver pin. The coupling elements have an asymmetrical cross-sectional area and widen with increasing distance to the central axis. Through this design, a reliable transmission of high torques is achieved with lower strains of the borer body in the area of the driver connection. Simultaneously, an automatic centering of the two tool parts to one another is performed.

Abstract: A three-way indexable throwaway tip for deep-hole drilling can be used as a center cutting blade body for a drill head in either whole cutting type or uncut core break-off type applications. The throwaway tip for deep-hole drilling is of a thick plate body having a three-fold symmetry with three cutting sections that are rotationally spaced apart at a central angle of 120 degrees. When mounted on a drill head, one cutting section of the throwaway tip faces a drilling direction. The forward facing blade edge of that cutting section includes an inner blade edge shorter in blade length and an outer blade edge longer in blade length forming an apex. The outer blade edge is composed of two consecutive blade edge portions of a peak-side outer blade edge portion having a smaller outer blade edge angle and a corner-side outer blade edge portion having a larger outer blade edge angle.

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 loose top for drilling tools, including front and rear ends, a pair of envelope part surfaces concentric with a center axis, and two chip flutes countersunk in relation to the pair of envelope part surfaces between which two bars project radially from a central core, the front end including a cutting edge and at least one clearance surface positioned rotationally behind the cutting edge, the rear end forming an axial contact surface.

Abstract: A drill of the loose top type, which is composed of a basic body and a replaceable loose top. In the front end of the basic body, a jaw is formed, which is delimited by two elastically bendable branches and an intermediate axial support surface, and in which the loose top can be securely pinched by inner support surfaces of the branches being resiliently pressed against side contact surfaces of the loose top. The two side contact surfaces of the loose top extend rearward from clearance surfaces that are included in the front end of the loose top. By forming the diametrical dimension between opposite side contact surfaces greater nearer the front end of the loose top, the branches of the jaw securely pinch the loose top in the area of the front ends thereof, where the branches have their maximal bending capacity.

Abstract: A drilling tool of the loose top type includes a basic body having two bendable branches having inner support surfaces that are resiliently pressable against side contact surfaces of a replaceable loose top. The mounting of the loose top is affected by turning-in from an initial position to an operative end position. An abutting edge along each side contact surface then bends out the branches and subjects the branches to a spring force that reaches a maximum in a dead position so as to then decrease somewhat up to the operative end position. During the final phase of the rotary motion, the operator obtains, in a tactile and/or auditory way, confirmation of the loose top indeed reaching its operative end position.

Abstract: The present invention may include a hole saw for use with a knockout of an electrical box, and the hole saw may include an arbor to clamp to a central shaft, a drive member to drive the hole saw, a saw blade connected to the drive member, a guide member to guide the saw blade. The guide member may be adapted to cooperate with the knockout of the electrical box and may rotate with respect to the central shaft. The central shaft may include a flat surface, and the arbor may include a set screw to cooperate with the flat surface. The guide member may include a cylindrical portion, and the guide member may include a narrow portion. The guide member may include a shoulder, and the saw blade may include a saw blade wall to connect to the drive member. The drive member may include a set screw, and a distal end of the central shaft may include a threaded portion. A fastening device may be connected to the threaded portion of the central shaft.

Abstract: One non-limiting aspect of the present disclosure is directed to a multi-piece spade drill head for a spade drill, wherein the spade drill includes an elongate body portion and a cutting portion removably secured to an end of the body portion. The multi-piece spade drill head includes at least two insert pieces, each piece including a cutting edge. The at least two insert pieces are configured to be removably secured to the body portion of the spade drill adjacent one another and with the cutting edges of the insert pieces aligned to together form a cutting edge on an end of the spade drill.

Abstract: The invention relates to a drilling tool for machine tools. The drilling tool comprises a drill body, a cutting head arranged on the front face of said drill body and a shaft arranged at the end thereof, wherein the drill body has two chip flutes, which are delimited at their flanks by ribs and a first chip flute of which is spirally curved. A special feature of the invention is that a second chip flute is not spiraled or is spirally curved with a pitch differing from the first chip flute, preferably running in the same direction of rotation.

Abstract: A drill system and cutting insert geometry is provided, with the system comprising a drill body having at least one cutting insert, with the at least one cutting insert is formed with at least one cutting edge, and has a first negative clearance surface and a second positive clearance surface, wherein the first negative clearance surface plastically deforms the surface of a work piece to produce a smooth surface finish and substantially reduce or eliminate chatter during a machining process.