Abstract: A machine tool comprises a fixed bed; a carriage with a tool post mounted thereon is provided on the fixed bed on one side; and a headstock is provided on another side so that the headstock is connected to a headstock base and is movable between a workpiece machining position for machining a workpiece and a workpiece loading/unloading position for loading or unloading a workpiece. The tool also includes a chip collecting space disposed in a cut out portion of the fixed bed adjacent to the workpiece loading/unloading position and a headstock guide unit comprising a guide support mechanism for supporting a front portion of the headstock base by the fixed bed when the headstock base is positioned at the workpiece machining position, and for supporting a rear portion of the headstock base by the fixed bed when the headstock base is positioned at the workpiece loading/unloading position.

Abstract: Disclosed herein is means for directly coupling main motor shaft to working machine with a coupling head as an intermediate component. By applying highly accurate precision machining technology. The machine unit assembled according to the present invention does not require recheck of dimensional deviation after completion of assembly. The present invention is applicable to both upright type and lateral type machine units.

Abstract: A wood lathe includes a bed, a headstock mounted on the bed and having a headstock housing, a motor mounted in the headstock housing and having a driving shaft with opposite first and second output ends, a spindle journalled to the headstock housing, a first transmission interconnecting the first output end and the spindle, a cooling fan disposed in the headstock housing for cooling the motor and including a driven shaft that is journalled to the headstock housing, and a second transmission interconnecting the second output end and the driven shaft so as to permit rotation of the driven shaft when the motor is actuated, which, in turn, cools the motor.

Abstract: A wood lathe includes first and second seats disposed respectively and fixedly on two ends of a table. A first driving device includes a motor disposed on the second seat, an outer tube fixed between the first and second seats, and a rotating inner rod journalled within the tube and connected to the motor by a belt and pulley unit. An output shaft is journalled on the first seat, and is provided with a fixed first clamping element. A second clamping element is disposed adjacent to the second seat so as to clamp a workpiece between the first and second clamping elements. A second driving device is disposed within the first seat, and interconnects the shaft and the rod to transfer rotation of the rod to the shaft, thereby rotating the workpiece.

Abstract: A lathe for tooling a wood workpiece includes a shaving collecting member disposed proximate to a tool rest. A drive transmission member transmits the rotating force of work spindle to a drive shaft so as to rotate an impeller mounted in an accommodation chamber of a casing. The shaving collecting member has a duct communicated with the accommodation chamber such that wood shavings are drawn from the duct into the accommodation chamber and out of a discharge port of the casing during a wood-cutting operation of the lathe.

Abstract: A wood lathe includes first and second seats disposed respectively and fixedly on two ends of a table. A first driving device includes a motor disposed on the second seat, an outer tube fixed between the first and second seats, and a rotating inner rod journalled within the tube and connected to the motor by a belt and pulley unit. An output shaft is journalled on the first seat, and is provided with a fixed first clamping element. A second clamping element is disposed adjacent to the second seat so as to clamp a workpiece between the first and second clamping elements. A second driving device is disposed within the first seat, and interconnects the shaft and the rod to transfer rotation of the rod to the shaft, thereby rotating the workpiece.

Abstract: A wood lathe includes a driving pulley unit disposed around a rotating inner rod, a driven pulley unit disposed around an output shaft that is used to rotate a workpiece, a V-belt unit trained on the driving and driven pulley units, and a speed-adjusting unit. When a rotary knob is rotated, amovable inner half of the driven pulley unit moves toward or away from a fixed outer half of the driven pulley unit so that the V-belt unit moves a movable outer half of the driving pulley unit away from or toward a fixed inner half of the driving pulley unit. As such, the position of the V-belt unit can be adjusted relative to the driving and driven pulley units to change the rotational speed of the output shaft.

Abstract: An integrated power chuck assembly for a lathe has a hollow lathe spindle of a diameter sufficient to accommodate at least the actuating cylinder and a multiple medium feed device and preferably at least part of the stroke-control device which can include at least one sensor for the position of the piston.

Abstract: The lathe provided in accordance with the invention is designed to address the needs of today's bowl and spindle turners. In an exemplary embodiment, the lathe of the invention comes equipped with a 2 hp DC Baldor motor and a state-of-the-art 3 hp Minarik pulse-width modulated (PWM) motor drive. It has a continuous power rating of 2 hp and an effective intermittent power rating of nearly 3 hp. The lathe has three speed ranges: 0 to 600 rpm for large bowl turning, 0 to 1200 rpm for standard bowl turning and 0 to 2000 for high-speed bowl turning and finishing. A number of accessory bed extensions are available along with an outboard tool rest and tailstock.

Abstract: A wood-turning lathe includes a driven shaft mounted with a pulley unit having a plurality of angularly spaced retaining holes, a spring-biased pin and a cam member associated with both the pin and the pulley unit. When the cam member is moved to a locking position, the pin is urged by the cam member to engage a selected one of the retaining holes in the pulley unit to immobilize the pulley unit. When the cam member is moved to an unlocking position, the pin disengages from the selected one of the retaining holes in the pulley unit to permit rotation of the pulley unit.

Abstract: A wood-turning lathe includes a driven shaft and a drive shaft journalled on a headstock body. A speed change device includes a first pulley unit mounted on the drive shaft, and having a first fixed pulley and a first movable pulley that cooperatively define therebetween a first belt receiving space and that form a radially and outwardly diverging first belt-engaging surface. A control unit has an operable knob which is exposed from the headstock body and which is operably associated with the first movable pulley. A second pulley unit is mounted on the driven shaft, and has a second fixed pulley and a second movable pulley which cooperatively define therebetween a second belt receiving space and which form a radially and outwardly diverging second belt-engaging surface. A non-elastic belt interconnects the first and second pulley units, and is frictionally slidable along the first and second belt-engaging surfaces.

Abstract: An apparatus for primary and secondary machining of a workpiece segment of a length of bar stock includes a lathe for primary machining of the workpiece and a rotary transfer machine for secondary machining of the workpiece. The lathe has a sliding headstock for rotating and advancing the bar stock and a rotatable drive collet for holding the bar stock. A rotatable guide bushing is aligned with the drive collet for supporting and clamping the bar stock. A tool holder is positioned adjacent to the guide bushing for holding one or more tools for primary machining of the workpiece. The rotary transfer machine receives the workpiece via a fixture aligned with the lathe and performs secondary machining of the workpiece.

Abstract: In a machine tool of the type comprising a spindle mounting slide which is driven by a linear electric motor and which runs in a vertical direction in a slideway, the slide comprises two runners designed to engage with corresponding fixed sliding guides integral with the slideway, and two roller pads that slide on corresponding longitudinal sliding surfaces which are also integral with the slideway.

Abstract: In order to improve a machine tool for the turning of workpieces with eccentric sections, comprising a tool support, a workpiece spindle which comprises a workpiece chuck, in which the workpiece can be clamped with a variably adjustable eccentricity, wherein the workpiece chuck has a chuck housing, a collet actuation and a collet support arranged in the chuck housing and having a collet held therein, the collet being adapted to be brought into concentric or eccentric adjustable positions relative to the spindle axis, in such a manner that the adjustment of the collet support relative to the chuck housing can be brought about more simply it is suggested that an adjusting element be provided on the machine tool which is movable towards the workpiece chuck for the adjustment or the respective adjustable position of the collet and may be brought into operative connection with the collet support and that in this operative connection the relative movement between the collet support and the chuck housing for alterin

Abstract: A machine tool that comprises a fixed bed, a pair of tool posts mounted on the fixed bed on a side closer to an operator and a carriage mounted on each of the tool posts is disclosed. A headstock is provided on a side of the fixed bed farther from the operator so that a workpiece disposed in the headstock is subjected to a cutting process by moving the carriages and the tool posts relative to the workpiece. The machine tool also includes a headstock base having the headstock disposed thereon. The headstock base is structured and arranged so as to be movable between a workpiece machining position where the workpiece can be machined at a position farther from the operator and a workpiece loading and unloading position where the workpiece can be loaded and unloaded at a position closer to the operator. A chip collecting opening is provided in the fixed bed between the carriages and the headstock when the headstock is positioned in the workpiece machining position.

Abstract: A transmission mechanism for spindle head of five-axis machine tool comprises three axes which are driven simultaneously. The transmission mechanism comprises a spindle transmission unit, a B-axis transmission unit and a C-axis transmission unit, and each transmission unit has a motor such that the rotary speed of the spindle is controlled by the two-speed change gear at top side thereof. The cutting unit below the spindle is driven by the spindle for processing. The transmission mechanism has knife replacing unit and blower to blow off dust when replacing knife. The B-axis transmission unit provides 115 degree swing through a gear set and a worm wheel. The C-axis transmission unit provides the dividing head with 360 degree rotation. Therefore, the B-axis transmission unit and the C-axis transmission unit provide the spindle with omni-directional rotation to process irregular curved surface.

Abstract: A device for machining a part by metal cutting comprising a massive block in a bore of which is located a sliding column guided in a front bearing and a rear bearing, at least the front bearing and the section of the column sliding therein being continuously convex in cross-section with three lobes distributed at 120° about a central axis. The front and rear bearings are hydrostatic journal bearings. The column supports a sliding block on which is mounted a slide in which is incorporated a turret head for dispensing cutting tools.

Abstract: A modular device for holding a workpiece or a bar of a material to be machined in a gripping chuck of a rotating spindle of a machine tool. A gripping chuck is actuated by a thrust tube coaxial with the spindle. To tighten the chuck, various forces are exerted including: a spring applying a first axial force on a thrust tube and applying a first air pressure force introduced through a duct into at least one tightening-pressure chamber. The tightening-pressure chamber is defined between at least a first wall fastened axially to the thrust tube and at least a second wall fastened axially to a regulating tube. Loosening of the chuck is obtained by a second air pressure introduced through another duct into at least one loosening-pressure chamber made between and on the other faces of the first walls fastened axially to the thrust tube and the other faces of the second walls fastened axially to a regulating tube.

Abstract: The present invention therefore provides in one aspect a lathe including: a headstock comprising a lathe spindle; a tailstock; and a lathe bed wherein the lathe bed is mounted to be rotatable in a horizontal plane about a vertical axis. In a second aspect of the invention there is provided a lathe including: a headstock comprising a lathe spindle passing through a hollow column and within the hollow column means adapted to safely connect a vacuum to the interior of the lathe spindle; a tailstock; and a lathe bed wherein the lathe bed is mounted to be rotatable in a horizontal plane about a vertical axis.

Abstract: A working machine for machining a workpiece includes a base having a first track and a second track mounted therein and arranged in parallel with each other, at least one clamping device slidably mounted in the first track for clamping the workpiece, and at least one cutter device slidably mounted in the second track to mate with the at least one clamping device for machining the workpiece. In such a manner, the at least one cutter device is movable relative to the at least one clamping, device to machine the two ends of the workpiece.

Abstract: The present invention relates to an electrically driven chuck for holding a chuck of a machine tool, wherein an electrically driven chuck which has no need of any driving means to be exclusively used for a holding chuck, very simplified, and freely adjustable.Chuck fixing means 40 is locking means for locking a chuck body on a headstock 1. Position-deciding pin driving means 42 includes position-deciding part 43 which has piston 44. The insertion of position-deciding part 43 is inserted into position-deciding hole 41 when pressured air is supplied within cylinder 46. When built-in motor 4 is rotatively driven, both main spindle 2 and scroll 17 are rotatively driven, and jaws 30 move to hold or un-hold a work in the radial direction.

Abstract: There is proposed an apparatus for machining pipe ends having a motor, a gearing assembly, and a clamping means for clamping a pipe end to be machined on the apparatus, the apparatus having a hollow rod, a tool support with a tool holder, characterized by the fact that the motor and the gearing assembly are arranged alongside of each other and that all units with the exception of the tool support are surrounded by a housing and thus form a compact and handy arrangement, and that the housing has a bottom surface which serves as standing surface and simplifies the handling of the device. The tool holder is provided with a cutting plate which is developed as turnable tip which has at least two active cutting edges.

Abstract: An apparatus for servicing and repairing cues including a collet mounted to a rotation member and having a collet body defining a passage including a generally conical surface, at least two collet jaws formed of a flexible resilient material and slidably disposed within the passage to define arcuate gaps with the surface, and an adjuster for slidably moving the collet jaws to flexibly bear against a cue inserted through the collet. A cutter feed includes a mounting to a bed proximate to a headstock for movement parallel to the bed. A cue tip shaper mounted to the cutter feed and having a rotatable arm for shaping a cue tip to a preselected curvature. A flexible resilient sleeve rotationally mounted to a support for holding a cue by frictional contact. A pivot mount for mounting a motor to the bed in a first position proximate to the support and pivotable to a second position proximate to the headstock. A pincers press mounted for sliding movement along a guide way to pinch and smooth wrap on a cue.

Abstract: A draw tube adaptor for insertion into the draw tube of a lathe. The draw tube adaptor includes a sleeve, and carried within the sleeve are a series of bushings spaced apart from one another. The bushings have bores sized to accommodate the diameter of the stock to be worked, and are maintained in a spaced apart relationship by cylindrical spacers carried within the sleeve. These spacers space the bushings at desired locations throughout the length of the sleeve. A cap arrangement is provided on the sleeve to retain the cylindrical spacers and bushings within the sleeve.

Abstract: A positioning device for a driving shaft of a lathe chuck includes a casing, a motor received in the casing with a driving shaft of the motor extending through a first end and a second end of the casing, and a disk disposed to the first end of the casing and threadedly mounted to the driving shaft. The disk has at least one hole defined therethrough and the first end of the casing has a plurality of holes defined therethrough so that a pin is removably extending through the hole in the disk and received in one of the holes in the first end of the casing to position the driving shaft to which the lathe chuck is connected.

Abstract: A securing device for a workpiece spindle of a lathe includes a spindle housing having a plane surface and rotatably supporting a workpiece spindle, a brake disk non-rotatably connectable with the workpiece spindle, a clamping device for fixing the brake disk and mounted on the spindle housing, the brake disk being formed as a disk which is rigid in a circumferential direction and is bending-resistant in a direction of a spindle axis, the disk being pressable by the clamping device against the plane surface of the spindle housing.

Abstract: A face-driver assembly and method for accurate coupling of a face driver with the spindle of a rotary-drive machining device. The assembly includes a face driver, a hub on the spindle defining a prealignment bore, a pair of self-centering coacting tooth sets on the hub and face driver, an engagement post extending into the hub and forming a prealignment shaft closely complementary to the prealignment bore, and a releasable coupling to hold and draw the engagement post rearwardly and thereby join the tooth sets in a manner facilitating final accurate centering.

Abstract: A turretless turning machine dedicated to the manufacture of a limited number of parts includes a base, a spindle assembly for holding and turning a workpiece, a motor, a direct drive assembly for transferring power from the motor to the spindle assembly, and a cutting assembly, the base being of sufficient mass and area to provide a damping force that facilitates reducing vibrations and harmonics generated by the machine, the motor and direct drive assembly being adapted to rotate the spindle assembly about a vertical axis at a rate wherein chip fragments aviate off of a workpiece being machined such that heat generated by the tooling process is removed by the chips which have absorbed the heat.

Abstract: Motor spindle cooled by coolant for a machine tool comprising a workpiece spindle and a drive motor having a rotor surrounding the workpiece spindle, concentric with the workpiece spindle and connected to the workpiece spindle, and a stator surrounding the rotor and concentric with the rotor, and comprising a spindle housing accommodating the drive motor and coolant channels surrounding the stator, at least one inner coolant channel enclosing the stator at least to a major extent and at least one outer coolant channel similarly enclosing the stator at least to a major extent being provided--in section through the three-phase motor perpendicularly to the spindle axis--for decoupling the spindle housing thermally from the drive motor, the outer coolant channel lying--in relation to the spindle axis--outside the inner coolant channel in the radial direction, and a coolant inlet being connected to a first end of the outer coolant channel, the second end of the outer coolant channel to a first end of the inner coo

Abstract: A machine tool is provided having a spindle mounted for movement in a direction parallel to the spindle axis, the Z direction, and a direction perpendicular to the spindle axis, the X direction. The machine tool includes a machine bed and has means mounted to the machine bed for supporting at least one tool. At least one spindle is rotatably supported on the machine bed and includes a chuck for supporting a workpiece. The machine tool includes means mounting the spindle to the machine bed for movement in the Z direction and for independent movement in the X direction. Accordingly, the workpiece supporting means may be moved proximate to the tool supporting means and the workpiece may be engaged by a tool. The machine tool may further include feeder means for feeding bar stock to the workpiece supporting means so that the bar stock may be engaged by a tool. The machine tool may also include workpiece transfer means for facilitating the transfer of workpieces to and from the workpiece supporting means.

Abstract: A temperature change of a machine tool which is influenced by a heat generating source is detected by a temperature sensor. A temperature change having substantially the same time constant as a time constant of a thermal distortion of the machine tool is calculated by using the detected temperature change. A machining error is corrected on the basis of the thermal distortion corresponding to the calculated temperature change. According to a method and an apparatus for compensating for the thermal distortion in the machine tool, it is possible to perform the compensation relative to the thermal distortion with high precision. The invention is applied to a machine tool such as a machining center and an NC lathe.

Abstract: An apparatus for processing edges of ophthalmic lenses with a gripping device for the ophthalmic lens. The gripping device grips the ophthalmic lens in such a manner that the edge to be processed in accessible, with a turning the gripping device with the gripped ophthalmic lens turns about an axis of rotation. A tool is held in a support and is brought into contact with an edge area of the ophthalmic lens to be processed for the processing procedure. The tool is a lathe tool, with the support being conveyed by a control unit in at least one direction during a rotation of the gripping device corresponding to a prescribed shape of the ophthalmic lens.

Abstract: The invention comprises an automatic lathe apparatus adapted to be programmed for automatically cutting work pieces into contours with a pair of radial saw blades. The apparatus has an elongated frame with a center drive mechanism movably mounted on the frame intermediate the ends of the frame to accommodate variable length work pieces. The center drive mechanism provides opposing drive spindles independently driven to engage a pair of work pieces at one of their ends and drive them thereby. A pair of tail stock spindles are movably mounted and adjustable at the ends of the frame and have air operated cylinders to drive the spindles into engagement with the other ends of the work pieces. A screw operated platform is power driven by a screw to drive longitudinally along the length of the frame.

Abstract: A method and apparatus for machining a workpiece from a hardened unmachined part includes the use of non-rotating centers in a turning machine, on which the workpiece is mounted. The shape of the dead centers permits less force to be used in support of the workpiece for reducing friction between the rotating workpiece and non-rotating centers, while exerting a maximum amount of radial holding force to reduce runout in the machining operation. Lubrication can be supplied through the dead centers to further reduce friction and/or an anti-friction coating may be applied to the contacting surface of the centers for this purpose. Machining of the hardened part may be controlled by CNC equipment.

Abstract: A machine tool having a quick release draw tube includes a headstock with a spindle. A draw tube is slidably supported within the spindle and includes inner and outer surfaces. The draw tube includes a series of circumferentially spaced holes on the outer surface thereof. A draw tube locking or unlocking device cooperates with the spindle and includes a ball detent that is selectively received in one of the recesses provided on the draw tube for locking the same within the spindle. The machine tool also includes an adapter plate for mounting over the extended nose of the spindle for substituting a collet by a jaw chuck.

Abstract: A machine for simultaneously turning and boring a ring-shaped workpiece has a frame of four parallel structural shafts secured between end stands. An active spindle assembly is mounted on a carriage slidably mounted on the shafts. The carriage is hydraulically drivable axially toward a stop cylinder of a passive spindle assembly rotatably mounted but axially immovable on one stand, to clamp the workpiece ring between a clamp cylinder of the active spindle assembly and the stop cylinder. The clamp cylinder is rotatable by the main machine drive motor for turning the workpiece. The workpiece ring is introduced laterally to the working area by a loader shuttle. Then the workpiece is centered in the work space by an axially drivable centering crescent as the workpiece is clamped in position between the clamp cylinder and stop cylinder for the turning to commence. Cylindrical slides and slideways are provided at right angles for both radial and axial movement of the external turning tool mounting bar.

Abstract: A headstock cooling system for a machine tool comprising a base having a top, bottom and a first fluid passageway extending centrally therethrough from the top to the bottom. A bed is mounted on the base top and provided with a second fluid passageway extending coaxially from the first fluid passageway and in fluid communication therewith. A headstock is mounted on the bed and is positioned coaxial with and directly above the second fluid passageway and includes means for communication with the second fluid passageway for directing a cooling fluid from the second fluid passageway out of the headstock thereby cooling the headstock over at least a substantial portion of the headstock.

Abstract: Method and apparatus for forming a base defining a trunnion and a portion of a leg for a roller-cone-type rock bit. A workpiece is rough formed to comprise leg work, having a preliminary end surface, and trunnion work extending angularly from the leg work. An interface plate is mounted on a holder of a lathe with an indexing surface thereof facing generally radially inwardly but angled to correspond to a desired angular orientation of a trunnion in a finished bit. The workpiece is removably mounted on the interface plate, with the preliminary end surface abutting the indexing surface, by at least one pin-type connector projecting from one of the surfaces into the other. The trunnion work is then turned on the lathe. Other parts of the machining of the workpiece may be performed by removing the workpiece from the first interface plate and similarly mounting it on plates adapted for other machines, but otherwise similar to the first plate.

Abstract: A problem encountered with wood lathes is that they frequently require longer beds, different fixed center heights of their headstocks above the plane of the bed, and bowl turning attachments which are located on the bed or alternatively on the other side of the headstock. This invention provides a lathe (10) having a headstock base (11) separate from the headstock (12), a bowl turning attachment (13) which can be located either on the bed (14) or on the other end of the headstock (12). The bed (14) is provided with alignment apertures (40) (dowel holes) so that it can be bolted to the headstock base (11) the tail end of the bed having alignment apertures (40) so that another bed section can be secured to it or in the alternative, the bowl turning attachment (13) can be secured to it thereby in each instance increasing bed length, and all corresponding alignment apertures (40) which extend longitudinally are co-axial, and the assembly is modular.

Abstract: Disclosed is a system for forming a variable speed pulley, a variable speed drive system, a variable speed lathe, a lathe having a slidable, horizontally-rotatable headstock, and a variable speed lathe having a slidable, horizontally-rotatable headstock.

Abstract: A method for synchronously interlocking feed axes of a lathe is disclosed. In particular, a numerical controller (NC) controls the operation of a lathe by sending position command signals to servo amplifiers. The lathe turns a long workpiece chucked by two opposed headstocks which are driven synchronously. The servo amplifiers send signals to corresponding directional servo motors for moving the headstocks in respective directions. The present invention overcomes the problems of mechanical and workpiece displacement developed as loads on the servo motors by compensating for the positions of the feed axes by means of position offset values determined from the displacement of the machine or workpiece. Specifically, the displacements are detected in accordance with a difference between the torque of the two feed axes to be controlled for synchronous interlocking.

Abstract: A holding device on a turning machine for a workpiece, which is held by a chuck serving as a clamping device and being arranged at a receiving disk, is equipped with separate correcting elements disposed at the clamping device. The correcting elements may be controlled individually by electrical, pneumatic or hydraulic means. The correcting elements act on the clamping device in order to adjust the workpiece.It is thereby possible to adjust the clamping device itself in a defined manner, so that the clamped workpiece may be adjusted easily.

Abstract: A power chuck has a stationary housing, a chuck spindle rotatable in the housing about a chuck axis, a plurality of jaws carried on the chuck body movable radially toward and away from one another, an actuator shaft movable axially relative to the body, a jaw actuator connected between the actuator shaft and the jaws for displacing same radially outward on displacement of the element in one axial direction and for displacing the jaws radially inward on opposite axial displacement of the shaft, and a motion converter carried on the spindle.

Abstract: A turning machine has a spindle box, a workpiece spindle rotatably supported in the spindle box and having at its on end a clamping device for clamping rod-shaped workpieces, a tool holder arranged displaceably transversely to an axis of the workpiece spindle, a guiding bushing support, and a workpiece guiding bushing rotatably supported in the guiding bushing support so that the guiding bushing is oriented coaxially with the axis of the workpiece spindle and exchangeably mounted in the guiding bushing support. The workpiece spindle displaces the guiding bushing in the direction of the axis of the workpiece spindle. The workpiece spindle is sleeve-shaped and extends out of the spindle box over at least a length of the relative movement. The workpiece guiding bushing is exchangeable by the workpiece spindle guiding bushing for receiving the sleeve-shaped workpiece spindle.

Abstract: A power chuck has a stationary housing, a chuck spindle rotatable in the housing about a chuck axis, a plurality of jaws carried on the chuck body movable radially toward and away from one another, an actuator shaft movable axially relative to the body, and a jaw actuator connected between the actuator shaft and the jaws for displacing same radially outward on displacement of the element in one axial direction and for displacing the jaws radially inward on opposite axial displacement of the shaft. The jaws, shaft, and jaw actuator are rotatable about the axis relative to the spindle.

Abstract: An auxiliary-function hydraulic system is provided for a computerized numerical control (CNC) machine tooling unit. Hydraulic power is provided for locking collet or chuck to an open or closed position and providing an affirmative collet-open and/or collet-closed signal to communicate the collet position to the host computer. The tailstock can be brought gently forward to contact a workpiece and can be returned rapidly to the home position, with a break-away pressure feature being employed to overcome initial static friction. A pressure switch indicates that the tailstock is in position against the workpiece. A spindle brake applies braking to the spindle to stop the same from high speed either on command or in the event of system failure. In the latter case, braking occurs prior to loss of pressure to the collet closer cylinder. Also, a turret clamp locks and unlocks a tool changer turret.

Abstract: A brake is provided for a workpiece spindle for spindle control. The generation of position shear of a workpiece spindle due to the unbalanced contact of the brake is prevented by changing the clamping power before and after the contact with the workpiece spindle. After the clamping of the workpiece spindle, the servo controlling state of the workpiece spindle motor is maintained and the overheat of the motor is prevented by limiting the torque of the workpiece spindle motor.

Abstract: A drive for workpiece spindle of a machine tool comprises a drive motor to be arranged on the free end of a workpiece spindle, a motor housing, a rotor to be mounted on the workpiece spindle and a stator arranged in the motor housing. The motor housing is connectable with a spindle box and has a motor cover. Cooling medium passages extend between the motor housing and the motor cover, between the rotor and the workpiece spindle and between the spindle box and the rotor.

Abstract: An improved spindle assembly for a single or a multiple spindle machine is disclosed. An outer tubular member is mounted for rotation by the spindle machine. An inner shaft is positioned within the tubular member and a collet is movable between a locked and an unlocked position. A workpiece can be removed from the unlocked collet by high pressure liquid from the inner shaft. In one embodiment the inner shaft is rotated independently from the tubular member and is also axially reciprocable. A tool mounted on the inner shaft provides for interior machining at the same time as an exterior operation is being performed. In another embodiment the collet remains axially stationary.

Abstract: A single spindle drive apparatus for a conventional single or multiple spindle machine derives power directly from the main machine drive and provides increased operating speed. The drive apparatus includes at least one pair of speed change gears and a splined input shaft engaged by a complemental internally splined gear which is driven by the main idler drive gear on the machine. A chuck or collect or other tool holding device may be coupled to the output shaft. Tool speeds can readily be increased for between 2 and 5 times the machine drive speed. The apparatus includes mounting components which facilitate mounting upon the end tool slide of the machine.