Abstract: An edge milling cutter assembly for cutting opposite edges of a workpiece, has a first cutting assembly; a second cutting assembly positioned a predetermined distance from the first cutting assembly; a first guide roll assembly positioned in front of the first cutting assembly; a second guide wall assembly positioned in front of the second cutting assembly; wherein the first guide roll assembly and the second guide roll assembly are movable in relation to each other in equal distances; and a mechanism which engages the first guide roll assembly and the second guide roll assembly to facilitate equal movement of each of the guide rolls in such a manner that the first and second cutting assemblies cut equal amounts of material from opposite edges of the workpiece.

Abstract: The invention relates to a junction (14) between two components (10, 12) of a tool system that rotates about an axis of rotation (16), especially for use in machine tools. The junction (14) comprises an at least partially conical seat (18), arranged on the first component (10), which is coaxial to the axis of rotation (16) and which is defined by at least one annular front face (20). The second component (12) carries a coupling part (22) which comprises a coupling pin (24) having a conical surface (32) that is complementary to the conical seat (18) and an annular end face (26) pointing towards the annular front face (20) and, in the coupled state, resting against the same. A tie bolt (36) axially projects beyond the free end of the coupling pin (24) and engages, in the coupled state, in a cavity (38) that is adjacent to the seat (18). The junction also has tensioning means that can be actuated from the exterior for mutually bracing the components (10, 12).

Abstract: An apparatus for aligning a machine tool with a target location on a structure. A machine plate positionable on the structure has a plate bushing providing a hole through the plate. The apparatus also includes a nosepiece for guiding a distal end of the tool through the plate bushing to the target location. The nosepiece has a collet configured to be moved at least partly through and sideward in the plate bushing to center the nosepiece on an element projecting from the structure at the target location. The nosepiece can be attached to the plate bushing to establish normality of the tool relative to the projecting element.

Abstract: A positioning device for chip removing tools, in particular turning tools of chip removing machines like turning and milling machines or similar, in tool holders, in particular collet holders, clamping holders and shrink holders, having a receiver for the tool holder, which comprises first positioning means, in particular an engagement- or index groove, wherein in the tool holder receiver second positioning means are provided, which predetermine the first angular position ? of the tool holder with reference to the tool holder receiver through engagement with the first positioning means, wherein the tool holder is aligned in the tool holder receiver with its longitudinal axis along a first axis, wherein a tool receiver is provided, which fixates the tool in a second annular position ? with respect to the tool receiver, wherein the tool is aligned with its longitudinal tool axis along a second axis and the tool receiver is moveable with respect to the tool holder receiver, so that the tool is insertable into th

Abstract: A quick-change tool-holding method and system for securing a tool within a primary tapered recess is disclosed. The tool-holding system includes an adaptor having a tapered exterior that closely approximates interior dimensions of the tapered recess to fit snugly within the tapered recess. The adaptor defines a secondary interior tapered recess and includes an exterior threaded portion about an aperture leading into the secondary tapered recess. A threaded fastener is also provided to include a threaded portion that is cooperable with threads provided adjacent to the primary tapered recess to secure the adaptor therein, as well as an aperture through which at least a portion of the exterior threaded portion of the adaptor extends when the adaptor is secured within the primary tapered recess by the threaded fastener. A collet comprising a plurality of slits formed therein is provided to allow the collet to elastically deform and constrict the tool when placed within an internal passage defined by the collet.

Abstract: A tool holder and rotating spindle of a milling machine is provided. A dampening member may be disposed on an outer surface of the tool holder or spindle or between the tool and tool holder or tool holder and spindle to mitigate harmonic resonance attributable to the use of the tool holder with the cutting tool.

Abstract: A spindle head device (10) includes a spindle (12) and a tool retaining mechanism (16) detachably retaining a tool holder (14) on the spindle. The tool retaining mechanism includes a tool support member (52) having a receiving recess (50) detachably receiving the shank (46) of the tool holder, a tool clamp member (54) disposed to be displaceable with respect to the tool support member between an operative position and an inoperative position, and a mounting member (56) detachably mounting the tool support member and the tool clamp member to the spindle. The tool clamp member grips the shank of the tool holder and fixedly holds the shank to the receiving recess of the tool support member at an operative position, and, at an inoperative position, releases the shank to allow the tool holder to be attached or detached to or from the receiving recess.

Abstract: The invention relates to a connecting point (1) comprising two tool parts, of which a first tool part (3) has a receptacle (7) in which the second tool part (5) may be inserted, and a clamping device which clamps the tool parts together. The connecting point (1) is characterized in that a retaining device (25) is provided which, independently of the clamping device, holds the tool parts (3, 5) together in the joined state.

Abstract: A tool assembly in which a tool is releasably mounted on a tool holder. The tool is supported by the tool holder at two spaced apart regions which are formed independently therefore alignment between the axes of the tool and tool holder does not rely on tight manufacturing tolerances.

Abstract: An end mill including a shank having one end gripped by a chuck which is rotatable about a predetermined rotation axis, and a blade body attached to the other end of the shank and rotatable together with the shank. The blade body has a shape in which the area of a cross section in a plane perpendicular to the rotation axis decreases as the distance from the shank increases, and includes a linear cutting edge parallel to, and at a certain distance from, the rotation axis. An end cutting edge adjoining the cutting edge in the longitudinal direction thereof may be provided. The blade body includes, for example, a rake-face-side surface including a rake face and adjoining the flank-side surface in two portions, and a linear cutting edge formed at one of the positions at which the flank-side surface and the rake-face-side surface come in contact with each other.

Abstract: A cutting tool holder unit is composed of a cutting tool holder adapted to detachably mount a cutting tool thereon, and a front cover of a flange shape slidably fitted into a side of the cutting took holder mounted on a multi-spindle head. A groove formed on the inner circumferential surface of the front cover is slidably fitted into a groove formed on the cutting tool holder to form a cutting oil circulating channel and a cutting oil injection port is opened at an upstream position of a cutting tool mounting section relative to the direction of rotation of the cutting tool holder.

Abstract: The present invention describes a machine to that includes a casing and a toolholder spindle. The machine tool further includes a drive mechanism that drives the toolholder spindle. The drive mechanism includes first and second drive members. The first drive member rotates the spindle about its axis. The second drive member translates the spindle and is screwed onto the spindle in such a way that the spindle advances or reverses as a function of the relative speed of rotation between the first and second drive members. The machine tool also includes a first motor and a second motor. The first motor rotates the first drive member and the second motor rotates the second drive member. The machine too further includes a control unit that controls and adjusts the speed of rotation of the first motor and the second motor independently.

Abstract: The invention relates to a machine tool for milling workpieces, provided with at least two linear displacement axes and at least one pivot axis for carrying out relative movements between a tool and the corresponding workpiece with a workpiece mounting in which a workpiece may be clamped between two clamping points, whereby one of the linear displacement axes is provided as workpiece axis of the workpiece mounting, by means of which the workpiece may be linearly driven, which is furthermore provided with a tool holder for mounting a cutting machining tool, driven in rotation about a tool axis by means of a tool drive. The same conditions are achieved for workpieces of greatly different length for a highly accurate production, whereby two physically separate carriages (27, 28) for the workpiece mounting are provided, on each of which one of the clamping points (16, 17) is arranged and which both may be linearly driven along the same workpiece axis independently of each other.

Abstract: When a horizontal shaft and a piston are caused to travel to a first side with a gear coupling engaging, the revolution of the piston is designed to be restricted by meshing a spur gear with an internal gear fixed to a main body of a horizontal swivel part. On the other hand, when the horizontal shaft and the piston are caused to travel to a second side and the gear coupling thus disengages, the horizontal shaft and the piston are designed to be revolved in an integrated manner by meshing spur gears respectively with other spur gears. When the horizontal shaft and the piston travel from the first side to the second side, the spur gear is designed to be spaced away from the internal gear after the spur gear meshes with the spur gear.

Abstract: The non-axial force exerted on a pneumatic tool by a non-axial air supply is balanced to allow for uniformly radially distributed compliance forces on the tool. An annular air ring is disposed around the pneumatic tool, covering an air inlet port. Air is supplied by any route to a first air passage that supplies the air to the interior of the annular air ring, exerting a force on the annular air ring. Air flows in the annular space of the air ring, entering the tool air inlet port to drive the pneumatic tool. One or more second air passages are connected to the annular air ring in an even radial distribution. Each second air passage is connected to the air source, or terminates in an air blockage, creating a column of pressurized air that exerts a force on the annular air ring equal to the first air passage. The forces exerted on the air ring are thus balanced with respect to the axis of the tool.

Abstract: A sensor detects an axial position of a rod controlling a tool-gripping collet in a tool-holding spindle whenever a tool is picked during a working session. The current obtained rod position value is compared with previous rod position value, which has been obtained and stored during the previous tool-picking and, if their deviation is larger than a predetermined threshold, the collet closure is notified as defective. The rod position is obtained as an average of a plurality of closely spaced readings, which are taken after a predetermined delay from the collet closure.

Abstract: The invention relates to a device for green machining bevel gears, comprising an CNC machining station for gear cutting a wheel blank (K2). The machining station comprises a tool spindle which is used to receive a gear cutting tool and a work piece spindle which is used to receive the gear blank (K2). Said machining station also relates to a machining station which operates in a vertical manner. Said device also comprises a vertical processing station having a tool holder and a work piece spindle which is used to receive a work piece blank (K1). The machining station mechanically forms a functional unit together with the pre-machining station, wherein the work piece blank (K1) undergoes green machining in the pre-machining station, and is transferred as a gear blank (K2) to the first machining station after the first green machining where it is cut into a gear. Said machining station and the pre-machining station are linked together in terms of data and control.

Abstract: An apparatus for changing cutting tool bits rapidly on milling machines, lathes, drills and other types of rotary power tools includes a first portion that is attached to the rotary power tool and retained thereto. A second portion includes the tool bit attached thereto. The second portion is inserted longitudinally toward the rotary power tool and into a bottom of the first portion after a slide has also first been longitudinally displaced in a direction toward the rotary power tool. A plurality of balls are displaced outward, the balls preferably being ball bearings, thereby permitting an upper conical taper of the second portion to bear against an inside taper of the first portion. The slide is released and urged by an inner spring in an opposite direction forcing the balls to engage with an upper edge of a circular recess provided in the second portion, thereby retaining the second portion in position.

Abstract: The milling apparatus (10) is arranged in such a manner that the deep groove cutter (21) is attached to the milling cutter (20) and the rotational drive shaft (23a) is approximately orthogonal to a spine (16a) of a sheet bundle (16) by the mechanism for tilting the drive apparatus (24) when an EVA-based hot melt adhesive is used. The milling apparatus (10) is arranged in such a manner that the shallow cutter (22) is attached to the milling cutter (20) and the rotational drive shaft (23a) is tilted with respect to a conveying direction of the sheet bundle (16) by the mechanism for tilting the drive apparatus (24) when a PUR-based holt melt adhesive is used.

Abstract: A dust prevention mechanism of a spindle device that ensures prevention of cutting liquid etc. from entering an inner portion of the spindle device, which saves energy and reduces noise upon stop of rotation of a spindle is provided. In a dust prevention mechanism 1, a spindle device 2 starts operating upon a command from a controller 4. Then, a 2-port solenoid valve 7 is opened to supply a predetermined amount of compressed air into the inner portion of the spindle device 2. In contrast, the spindle stops rotating upon a command from the controller 4. The controller 4 closes the 2-port solenoid valve 7, while it opens a 2-port solenoid valve 10 in a bypass route B. The controller 4 supplies compressed air, whose amount is reduced by a diaphragm 9, into the inner portion of the spindle device 2 during a predetermined time set by a timer 8.

Abstract: A spindle device to mount and rotate an object, including: a housing; a main shaft supported by the housing rotatably to the housing wherein the main shaft includes a through hole which goes through from an end to the other end thereof, and an opening of the through hole forms a mounting section to mount the object at the end, and an opening of the through hole forms a suction section at the other end; a connecter member disposed to cover-the outside of the other end and connected with the external negative-pressure source; and a bearing disposed between the circumference of the main shaft at other end and the connecter member covering the outside; wherein the object is suctioned onto the mounting section at the end with the external negative-pressure source through the through hole.

Abstract: A tool coupler for connecting tool heads, such as drills, reamers, millers, turn-cutters, dies, and rams, to a tool holder. The tool coupler has a hollow shaft, a ring-shaped collar, and a gripper groove, in which gripper groove are disposed two diametrically opposite blind bore holes with varying bore hole contours.

Abstract: A versatile toolholder system is provided that is used by a numerically controlled machine tool. The toolholder system has an attachment portion that has a standardized shape to allow the toolholder to be used by conventional numerically controlled machine tools. The toolholder system is comprised of a toolholder body, a collet adaptor that allows a desired collect to fit into the toolholder body, a pull-up means to pull a collet to fasten the collect in the toolholder body. Various sizes and configurations of collet adaptor can be used to accommodate various collets of different shapes and sizes.

Abstract: A hollow portion of a spindle through which a draw bar and a disc spring assembly are inserted has a closed chamber structure and constitutes an oil pool chamber in which a lubricating oil is filled. The bearing portions that support the draw bar in the oil pool on both sides have the same inner diameter so that the volume of the oil pool chamber does not change when the draw bar is moved forward and backward. As a result, the lubricating oil is not pushed out of the oil pool chamber. Thus, a spindle unit can be provided in which a clamping device including the draw bar and the disc spring assembly for clamping a tool or a workpiece pallet at the forward end of the spindle can be reliably lubricated, so that the friction on and the breakage of the clamping device is reduced and that the service life of the unit is lengthened.

Abstract: A chuck for a processing machine (60) includes a connecting portion (101) extending into the processing machine (60), a head (11) and a flange (12) sandwiched between the head (11) and the connecting portion (101). A shoulder (122) is formed on a top face of the flange portion (12) to support thereon an annular pad (20) which is mounted around the connecting portion (101). A gap between the flange portion (12) and a bottom face of the processing machine (60) is compensated by an existence of the annular pad (20).

Abstract: A motor spindle for machine tool.

Abstract: The invention relates to an interface between two parts of a tool system, in particular to a metal cutting tool (1). Said interface comprises a holder (3) provided with a cavity (31), an interchangeable head (5) which is arranged on the axial extension of the holder and provided with a projection (33) introducible into the cavity (31) and a clamping device (19) for fixing the interchangeable head (5) to the holder (3). The inventive interface is characterised in that the clamping device (19) is provided with a holding bolt (41) and an eccentric element (21) which axially displaces said bolt and is actuated through a peripheral surface (17) of the metal cutting tool (1).

Abstract: The present invention provides an automated-torque controlled tool for attachment to a milling machine. The tool comprises an elongated hollow housing defined by a neck section, a middle section, and a bottom section. The neck section is adapted to engage a spindle of the milling machine for rotational and axial movement therewith. A torque spring is situated within the middle section of the housing. A torque adjuster is dimensioned and configured to sit within the neck section of the housing on top the torque spring. A bit holder and driver mechanism are rotationally mounted within the bottom section of the housing. When the torque threshold is reached by the bit holder, the driver mechanism rotationally disengages from the bit holder.

Abstract: A power tool having a body, a tool bit holder protruding from the tool body for holding and rotating a tool bit about an axis of rotation, and an operator for operating the bit holder. The operator includes an annular member rotationally engageable with the bit holder for manual turning to tighten and/or release the bit holder, and a mount mounting the annular member to the tool body for movement between a non-operative position, rotationally disengaged from the bit holder, and an operative position, rotationally engaged with the bit holder.

Abstract: In a tool holder, when oil supplied via an oil supply passage and an oil introducing passage reaches an atomizing space, the oil is atomized by an air flow of carrier gas consisting of compressed air, and then water supplied from a water supply passage and a water introducing passage is formed into a water drop in the atomizing space by an air flow of oil containing compressed air to generate the water drop with oil film in which the oil film is formed on a surface of the water drop. Since the water drop with oil film is supplied to a work piece through a top nozzle and an in-tool passage, the water drop with oil film is generated at an extremely close location to a tool, and therefore, responsiveness when supplying the water drop with oil film to the work piece can be enhanced.

Abstract: A case is mounted to the outer portion of the bottom portion of the shank through a bearing and an absorption rod is situated in an axial hole provided in the axial direction on the bottom of the shank such that it is slidable in the axial direction. An absorption spring for urging the absorption rod in the axial direction is installed between the absorption rod and the shank and a tiltable case is situated on the bottom within the case such that it is capable of tilting with respect to the axial line. A holder is situated rotatably through a bearing within the tiltable case. A slidable holder provided with a chuck portion for a tool at a leading end thereof is situated slidably in the axial direction and the bottom end portion of the absorption rod and the top end portion of the holder are connected to each other through a universal joint.

Abstract: An extension fixture for a turning tool includes a shank, a pull rod, a clamping sleeve, and a fixing member. Thus, the fixing member presses the rotation head of the pull rod to prevent the pull rod from being rotated, thereby preventing the clamping sleeve from being loosened from the pull rod, so that the turning tool is clamped by the clamping recess of the clamping sleeve. In addition, the pull rod is positioned in the shank by the fixing member to prevent the clamping sleeve from being loosened from the pull rod, so that the turning tool is clamped in the clamping sleeve closely and will not produce a vibration during operation of the turning tool, thereby preventing the turning tool from being broken due to the vibration.

Abstract: An end mill chucking structure for chucking an end mill. The chucking structure includes an end mill holder; a shank receivable in an axial opening in the holder; a cone having an exterior cone shape adapted to be received in a drive spindle and an axial opening that is telescopically received on the shank; and a retention knob mounted on the cone and connected to the shank for axially pulling the shank toward a position in which an integral neck on the cone is received in an opening in the tool holder. The retention knob is rotated to pull the neck into a tapered structure on the shank to wedge the neck in the tool holder.

Abstract: A tool assembly in which a tool is removably secured to a tool holder. A sleeve of the tool is first fitted onto a shaft of the tool holder and then, by symmetrically radially expanding the shaft, the tool is secured to the tool holder.

Abstract: An automatic tool changing device (30) has a tool storage device (31) with a plurality of tools stored therein, a tool chucking unit (41) and a tool unchucking unit (51) both capable of advancing/retreating between the tool storage device (31) and a tool changing position (P2), and a tool delivery mechanism (61). The tool chucking unit (41) is provided with a tool fastening mechanism (42) for fastening the tool chucking mechanism (24), and the tool unchucking unit (51) is provided with a tool loosening mechanism (52) for loosening the tool chucking mechanism (24). The tool delivery mechanism (61) delivers the tool positioned at a tool delivery position from the tool storage device into the tool fastening mechanism of the tool chucking unit so that the tool is held by the tool fastening mechanism, and delivers the tool retrieved by the tool unchucking unit from the tool unchucking unit to the tool storage device so that the tool is stored by the tool storage device.

Abstract: A collet chuck configured to connect to a standard milling machine spindle, wherein the collet chuck includes a centering sleeve having a tapered outer peripheral surface for contact with an inside peripheral tapered surface of the spindle and has an outer end disposed adjacent the mounting end of the spindle, a chuck body having a base with an outer end including mounting end to mount to the end of the spindle, and a biasing element operably disposed between the outer end of the centering sleeve and a portion of a back side of the base in a manner such that the biasing element exerts a force on the back side prior to a direct connection of the base to the mounting end thereby providing for variances in connection of the base to the mounting end of the spindle and assuring concentricity is maintained when so connected.

Abstract: A cutting head assembly for use in cutting plate glass has a simplified drive train, all positioned about the vertical rotational centerline. The drive train includes a hollow bore drive motor having a drive adaptor directly engaged with a spline shaft that extends through the hollow bore. The lower end of the spline shaft is directly engaged with a cutting tool holder for retaining a cutting tool. The drive motor imparts rotational movement to the cutting tool through the spline shaft and the cylinder imparts vertical movement to the cutting tool by vertical movement of the spline shaft.

Abstract: An apparatus is disclosed for releasably holding a toolholder shank having a lockable surface and a releasable surface utilizing an actuating bolt with an associated threaded actuating nut. When the actuating bolt is rotated in a locking direction, the actuating nut is drawn onto the bolt thereby clamping against the lockable surfaces of the toolholder shank. When the actuating bolt is rotated in the releasing direction, a releasing segment acts upon the toolholder thereby ejecting it from the tool support member.

Abstract: A milling tool holder apparatus includes a tool holder having a male structure received in a female opening of a shank, and a camming plug received in a transverse plug-receiving opening in the shank and the tool holder. Turning the camming plug in one direction moves the male structure axially to a locked position. Turning the camming plug in the opposite direction moves the male structure axially to a release position.

Abstract: To provide a tool mounting device for a turning center that allows a rotating tool to be clamped/fixed using a shared clamp mechanism (8), and a turning tool (1B) to be clamped/fixed in an engaged/locked state in a turning center.

Abstract: A tool for the machining of workpieces is provided with a coolant/lubricant supply and an actuation unit for the activation of supplementary functions of the tool, with an actuation element and an actuation medium circuit. The actuation unit is separated from the coolant/lubricant supply by a separation element. The separation element can be exposed on one side to the coolant/lubricant and on the other to the actuation medium.

Abstract: In a cutting tool arrangement and a tool for chip removing machining, the cutting tool arrangement comprises a tool, fastening arrangement, and a shank. The tool is a one-piece unit. The axial channel is of non-circular cross-section to provide a key grip. An end of the axial channel comprises material at least partly blocking the axial channel.

Abstract: An orbital machining apparatus for producing a workpiece hole with a cutting tool, including: a first actuator for rotating the tool about its longitudinal center axis during the machining of the hole; a second actuator for moving the tool in an axial feed direction substantially parallel to the tool axis; a third actuator for rotating the cutting tool about a principal axis; and a radial offset mechanism. The third actuator includes a rotating drive driven by a motor, a carrier ring connected to and rotated by the drive by two opposed, radial drive pins. The ring performs a radial sliding movement relative to the drive while being rotated thereby. Two opposed, radial carrier guide shafts circumferentially spaced 90° from the drive pins and connecting the ring and an inner cylindrical eccentric body such that the latter may perform a radial sliding movement relative to the ring while being rotated thereby.

Abstract: A rotary tapered tool holder includes a body or shank including a front contact portion and a rear contact portion. An adapter sleeve is disposed about a portion of the shank. The adapter sleeve includes slits that allow radial expansion and contraction of the adapter sleeve. The adapter sleeve includes an inner surface formed at a first non-zero taper angle with respect to a longitudinal axis of the shank, and an outer surface formed at a second non-zero taper angle with respect to the longitudinal axis of the shank. The second taper angle is different than the first taper angle such that an interference fit between the shank and the inner surface of the adapter sleeve forces the outer surface of the adapter sleeve into positive contact with a tapered bore of a spindle of the rotary tapered tool holder.

Abstract: A method and a device for detecting the incorrect chucking of a machine tool capable of easily and surely detecting a chucking error; the method, comprising the steps of measuring, by a sensor (12), the change of a distance (d) between the sensor (12) and the outer peripheral surface of the flange part (2B) of a tool holder (2) installed in a spindle (3) through all around the periphery of the tool holder while rotating the tool holder (2), performing a FFT analysis of the measured data by a CPU (18), extracting a fundamental frequency component, and calculating the amplitude thereof, whereby the eccentric amount of the tool holder (2) can be calculated by using the amplitude of the fundamental frequency component and, when the eccentric amount exceeds a preset allowable value, the tool holder (2) is judged to cause an incorrect chucking.

Abstract: The invention provides a shape member manufacturing apparatus and a shape member manufacturing method which aims at cutting and grinding a joint projection 8B formed when a plurality of shape members are joined together by welding or friction stir welding, in a short time with high accuracy. A plurality of mounts 11 having a side structure 8 placed thereon are arranged in the longitudinal direction of the side structure. A joint projection 8B of a welded portion or a friction stir welded joint is formed on the surface of the side structure 8 in its longitudinal direction. A carrier 100 travels in the longitudinal direction of the side structure 8. Columns 105 are installed in a girder 103 of the carrier, and a milling cutter device 80 and a grinding device 90 are installed in lower portions of the columns 105. A milling surface of a milling cutter 81 of the milling cutter device 80 has a circular-arc shape with a radius R.

Abstract: A tool support for fixed or rotating tools embodied with a collet chuck receiver for a collet chuck for clamping a tool shaft from the direction of the tool side. The collet chuck receiver has a tapering bore for receiving a collet chuck and a coaxial screw thread assigned to the bore for receiving a tensioning nut. In place of a collet chuck, a tool clamping insert is inserted with a tapering receiving neck into the tapering receiving bore, wherein the tool clamping insert is clamped in place by fastening means from the direction of the tool side.

Abstract: A holder for a collar having an axially forwardly directed shoulder and axially rearward thereof a radially outwardly directed centering surface has a drive sleeve fitted over the collar and a plurality of angularly spaced jaws each formed with an axially rearwardly directed face and displaceable between an outer position with their faces bearing on the shoulder and an inner position with their faces out of engagement with the collar. An axially displaceable actuating member can move the jaws between their inner and outer positions. A plurality of retaining fingers each have an axially rearwardly directed face and axially rearward thereof a radially outwardly directed centering face. These fingers are each radially elastically deformable between an outer position with the front-end faces bearing axially rearward on the shoulder and the centering faces bearing radially outward on the collar centering surface and an inner position out of contact with the collar.

Abstract: A cutting tool assembly including: (a) an arbor including a tapered shank portion which has a taper of 7/24 and a size of No. 30; (b) a cutting tool having at least one cutting blade and fastened to the arbor; (c) a fastener for fastening the cutting tool to the arbor; and (d) a relative-rotation preventing mechanism for preventing rotation of the cutting tool relative to the arbor. The cutting tool assembly has a weight of not larger than 3 kg. The arbor and the cutting tool have respective contact surfaces which are held in contact with each other. The relative-rotation preventing mechanism is provided by at least one receiving hole which is formed in one of the contact surfaces, and at least one protrusion which is formed on the other of the contact surfaces and which is received in the above-described at least one receiving hole.

Abstract: A tool holder assembly having a cutting tool, a tool holder, and a sealing portion. The sealing portion is configured to inhibit fluid leakage between the cutting tool and the tool holder.