Abstract: An apparatus and method for in-situ milling includes a support and a pair of spaced apart rails attached to the support. The support and rails are mounted between a pair of opposed mill housing wear plate surfaces. A milling assembly is reversibly mounted on the rails in either of a first orientation and a second orientation. In the first orientation, the milling assembly mills one of the wear plate surfaces. The milling assembly is reverse mounted on the rails to the second orientation for milling the other of the wear plate surfaces. This permits the support and the rails to remain in one position between the wear plate surfaces requiring only the milling assembly to be moved to accomplish milling of each of the wear plate surfaces.

Abstract: A longer life, low cost tool and tool holder enabling change of posture with respect to a spindle, having a high machining accuracy of a workpiece, and resistant to generation of vibration or heat, provided with a working tool for processing a workpiece, a motor having an output shaft to which the working tool is connected and rotating the working tool, a first holder for holding the working tool and the motor, a mount attached to the spindle, a generator to which rotational force is transmitted from the spindle through the mount and generating electric power for driving the motor, a second holder for holding the mount rotatably, holding the generator, and engaged with a nonrotating portion of the machine tool, and a posture adjustment mechanism which connects the first holder and the second holder and is able to change the posture of the working tool with respect to the spindle.

Abstract: A tool attachable to a spindle of a machine tool in the same way as an ordinary tool, capable of being driven without connecting with an external power supply etc., giving a higher rotational speed than that of the spindle of the machine tool without supplying electric power from the outside, and able to be changed automatically, provided with a machining tool for machining a workpiece, a motor for driving the machining tool, a generator for generating electric power to drive the motor by the rotation of the spindle, and a breaker for breaking a supply line of electric current from the generator to the motor when electric current over a predetermined value flows in the supply line.

Abstract: The invention provides an apparatus for positioning a cutter a tool relative to a spindle of a machine tool. The machine tool include a spindle having a rotating axis and a spindle housing for supporting the spindle for rotation about the rotating axis. The apparatus includes a shank which is adapted to be mounted to the spindle of the machine tool. A piston is provided in the shank for movement along an axis which defines an angle relative to the rotating axis of the spindle. A cutter, for machining a workpiece, is connected to the piston. A first fitting member is provided on the shank and a second fitting member is provided on the piston so as to be able to fit to the first fitting member. Each of the first and second fitting members include an abutment provided on the first and second fitting members to contact each other in the direction of the axis.

Abstract: The invention is directed to a secondary power tool system, components thereof and methods for using the same. It is preferably for use with an automatic tool change CNC machine having a rotating tool receiving element. The system includes a power source delivery interface component having an interlock and a high-speed rotating spindle accessory component. The delivery interface provides an autonomous connection point for delivering any one of several modes of power, e.g., compressed air. The rotating spindle accessory includes a housing adapted to be received by the rotating tool receiving element and a motor. A connector arm operably coupled to the housing defines at least one conduit for delivering the power, such as compressed air, to the motor. It also includes a delivery probe adapted to actuate the power delivery interface interlock so that when presented to the power delivery interface, power is autonomously delivered to the motor.

Abstract: A tool attachable to a spindle of a machine tool by an automatic tool changer in the same way as an ordinary tool, capable of being driven without connecting with an external power supply etc., and able to rotate at a rotational speed different from than that of the spindle of the machine tool without supply of electric power from the outside, provided with a machining tool for machining a workpiece, a motor connected with the machining tool and rotating the machining tool, and a generator to which rotary force is transmitted from the spindle of the machine tool and generating electric power to drive the motor, the shaft of the motor being arranged in an orientation different from the axial center of the spindle.

Abstract: A machine tool provided with a universal head free from restrictions on its swivel operation due to the presence of a power cable to a motor directly driving a spindle and consequently expanded in range of movement, provided with a ram serving as a support, a swivel member held by the ram to be able to swivel about a predetermined swivel axis, a tool mounting member held at the swivel member, rotatably holding at its front end a spindle to which a tool is mounted, and provided with a motor for driving the spindle, a generator provided at the swivel member and generating power used by the motor, and a power source provided at the ram and supplying power to the generator.

Abstract: An apparatus for machining vertical panels is provided including a frame 10 for supporting a panel in a substantially vertical plane, a tool mount 22, and a mechanism 14, 18, 20 supporting the tool mount 22 for movement in two directions over the panel plane. The tool mount 22 has an axis 24 along which a tool on the mount can be moved towards and away from the panel plane and about which the tool can be rotated to change its orientation relative to the panel plane.

Abstract: A spindlehead for tools is insertable into a tool disk with holders provided for such spindleheads. A spindle holds the shank of the tool in its chuck at its front end section, and is rotatably mounted by a spindle bearing in a spindlehead housing. A coolant feed extends at least in part in the spindlehead housing to convey coolant to the tool via at least one coolant channel and an internal coolant feed line in the spindle. A sealing device with a throttling point is separated form parts of a drainage channel. The sealing device has at least one sealing ring enclosing the spindle. The sealing ring is longitudinally movable in the spindlehead housing coaxially with the spindle axis. After longitudinal movement into a sealing position, the sealing ring separates the internal coolant feed line from the associated parts of the drainage channel up to a specifiable leakage amount. The accuracy of machining with the tool may be increased and the installation space available can be better used.

Abstract: An articulated milling arm for a milling instrument, which includes a milling arm support movably attached to a frame to allow vertical displacement of the milling arm support; a first vertical axle, rotatably connecting the first milling arm support to a middle portion of the milling arm to allow swiveling of the middle portion of the milling arm horizontally about a vertical axis of the first vertical axle, the first vertical axle being provided with a braking surface; a second vertical axle, rotatably connecting the middle portion of the milling arm to a milling unit support to allow swiveling of the milling unit support horizontally about a vertical axis of the second vertical axle, the second vertical axle also being provided with a braking surface. The milling arm is provided with a movable braking plate, on the middle portion of the milling arm, which movably contacts the braking surface of the first vertical axle and the breaking surface of the second vertical axle.

Abstract: The invention relates to a tool head with a spindle bearing arrangement The bearings (9, 10) of said arrangement rest with one of their bearing shells on a driven spindle (2) with a tool holding fixture (1). With their other bearing shell they interact with a housing (8) in such a manner that in at least one part (10) of the bearings (9, 10) the respective other bearing shell interacts with a sliding piece (11) which is slideable along the housing (8) in the one sliding direction and which locks the spindle (2) with the housing (8) in a locking position. In the other sliding direction, said sliding piece releases the spindle in a release position. The invention provides a universally useful tool head by the following configuration: The respective other bearing shell of the one part (10) of the bearings (9, 10) is at least partially enclosed by the sliding piece (11). Said sliding piece (11) is forced into the locking position with a predetermined contact force by a drive device.

Abstract: The invention pertains to a machine tool for processing workpieces with tools, wherein the machine tool has a spindle housing that contains a spindle shaft and accommodates at least one tool as well as a drive device that causes a rotational movement of the spindle shaft. The machine tool is characterized by the fact that the drive device (3) contains a hydraulically operated displacement machine or swash plate device.

Abstract: A right angle drive arrangement for attachment to a vertical milling machine to permit the vertical milling machine to be utilized with a tool disposed on a horizontal output axis. The drive comprises a right angle housing, a coupling for attachment to a vertically disposed rotatable spindle on the vertical milling machine. A first bevel gear is in vertical rotational alignment with the spindle and supported in the right angle housing. A second bevel gear is in horizontal alignment with respect to the right angle housing. An output shaft is attached to the second bevel gear for supporting a tool thereon, for use with a tool to horizontally work a material by the vertical milling machine.

Abstract: A tool, attachable to a spindle of a machine tool and capable of changing independently a rotational speed of a cutting tool from that of the spindle, provided with a cutting tool for machining a workpiece, an electric motor for driving the machining tool, a generator for generating electric power to drive the electric motor by the rotation of the spindle, a tool holding part for rotatably holding the cutting tool, a casing for holding the electric motor, the generator, the tool attachment part, and the tool holding part, and a locking part for preventing rotation of the casing by engagement with a non-rotating part of the machine tool.

Abstract: The present invention describes a head for machine tool on which an electro-spindle is mounted and in particular it describes a tilting head for machine tool on which an electro-spindle is mounted. In one embodiment the invention comprises a tilting head for machine tool comprising: one support element coupled to said tilting head; one electro-spindle; one cradle suitably shaped to incorporate and hold said electro-spindle pivoted on said support element so that it can turn around an axis perpendicular to the axis of said tilting head; said electro-spindle being set up to have mechanic, electric, pneumatic and hydraulic connections with said cradle; wherein said connections of said electro-spindle are of the releasable type so that said electro-spindle is interchangeable and can be rapidly coupled to and uncoupled from said cradle.

Abstract: A tool attachable to a spindle of a machine tool in the same way as an ordinary tool, capable of being driven without connecting with an external power supply etc., giving a higher rotational speed than that of the spindle of the machine tool without supplying electric power from the outside, and able to be changed automatically, provided with a machining tool for machining a workpiece, a motor for driving the machining tool, a generator for generating electric power to drive the motor by the rotation of the spindle, and a breaker for breaking a supply line of electric current from the generator to the motor when electric current over a predetermined value flows in the supply line.

Abstract: An attachment simplified in structure having resistance to mechanical error, vibration, or heat displacement, provided with a tool mount for rotatably holding a tool, an electric motor for rotating the tool mount, a generator to which rotary force is transmitted from a spindle built in the spindle head for generating electric power to drive the electric motor, and a casing for holding the electric motor and the generator, which is releasably clamped to the spindle head.

Abstract: A tool attachable to a spindle of a machine tool by an automatic tool changer in the same way as an ordinary tool, capable of being driven without connecting with an external power supply etc., and able to rotate at a rotational speed different from than that of the spindle of the machine tool without supply of electric power from the outside, provided with a machining tool for machining a workpiece, a motor connected with the machining tool and rotating the machining tool, and a generator to which rotary force is transmitted from the spindle of the machine tool and generating electric power to drive the motor, the shaft of the motor being arranged in an orientation different from the axial center of the spindle.

Abstract: An index-feed processing system that can reduce the machining cost of a product involving a plurality of machining processes is disclosed. The index-feed processing system comprises a plurality of processing units disposed in the longitudinal feeding direction of a workpiece corresponding to a plurality of processing processes so that the processing processes are performed sequentially as the workpiece is indexed. The processing unit body comprises a base plate and a support plate provided at a predetermined distance from the base plate, a slider provided movably between the base plate and the support plate in the direction orthogonally intersecting the base plate and the support plate, and a drive means for driving the slider. The processing units are formed as machining units so that machining operations can be performed by controlling the movement of the slider.

Abstract: A machine tool comprising a machining spindle, a device for inserting an auxiliary unit into the machining spindle, a tool magazine for providing a multitude of tools and a tool changer comprising at least one tool gripper for holding tools for the machining spindle for the transportation of tools between the tool magazine and an exchange position at the machining spindle. To ensure an automatic supply to the machining spindle as well as to the auxiliary unit in a simple and fast way the tool changer has at least one additional tool gripper for holding tools for the auxiliary unit.

Abstract: A tool-driving device (1), which is particularly provided for machine tools, has an internal drive (9), which serves to drive a tool. Also provided is a control device (36), which detects the movement of the tool-driving device (1) and correspondingly controls its drive (9). The tool-driving device (1) can thus be controlled independently of the other tool-machine controls.

Abstract: An assembly for fastening and locating an added head of a numerical machine tool comprises two cylinder mounts located in the periphery of a main shaft of the numerical machine tool. A piston is movably disposed between the two cylinder mounts such that the piston is driven by the hydraulic-pneumatic loops to move up and down so as to control the movement of an engagement block for retaining a retaining block of the added head. The main shaft of the numerical machine tool is provided with a crank-tooth coupler to facilitate the adjusting of the angular position of the added head in accordance with the operational requirement for processing a workpiece.

Abstract: A reconfigurable tool changer allows a tool cartridge to be easily attached to, or detached from, a standard machine-tool spindle head. The modular design, includes a revolving tool cartridge having a plurality of tool holders, a meshing gear for engaging a tool holder with the spindle of the machine tool, and an adapter block for positioning the revolving tool cartridge on any standard machine-tool spindle head. The adapter block allows the automatic tool changer to be easily coupled to a wide variety of commercial machine-tool spindles, making the invention a truly reconfigurable and portable tool changer. The revolving tool cartridge incorporates a novel three-dimensional cam structure mechanism, which allows tool indexing to be achieved by means of only one actuator.

Abstract: A machining unit on a machine tool, especially a universal milling and drilling machine, comprising a motor-driven work spindle rotatably mounted in a casing of a spindle head, an adapter unit comprising a motor-driven adapter spindle and insertable into the work spindle, a first connecting part disposed on the spindle head and containing plug-in connections connected by lines to supplies of working media and a second connecting part disposed on the adapter unit, and containing mating plugs which can be coupled to the plug-in connections for releasably connecting the adapter unit to the working-media supply. A clamping device for releasably holding the plug-in connections and mating connections in the coupled position is disposed on at least one of the two connecting parts, thus providing a secure connection between the plug-in connections disposed in the spindle casing and the mating connections disposed on the adapter unit.

Abstract: The invention pertains to a machine tool for processing workpieces with tools, wherein said machine tool has a spindle housing that contains a spindle shaft and accommodates at least one tool as well as a drive device that causes a rotational movement of the spindle shaft. The machine tool is characterized by the fact that the drive device (3) contains a hydraulically operated displacement machine.

Abstract: Operating head for automatic machine tools of the type comprising a structure (2) which moves along a set of three Cartesian axes, a first support (3), fitted to the said structure in such a way that it can rotate around a first axis (C), and a chuck unit (5) fitted to the said support, wherein the said chuck unit (5) is interchangeable and projects from the said first support (3), and is designed to allow angular positioning around a second axis (A) orthogonal to the said first axis (C). Said first support (3) incorporates a power transmission system and means designed to connect the said power transmission system to the said chuck unit (5). This feature allows to change over from roughing to finishing tasks without replacing the entire head, as is necessary with known equipment in which the chuck assembly is mounted on a fork support, merely by replacing the chuck unit, a much quicker and cheaper operation.

Abstract: An angle spindle attachment includes a spindle shaft 21 for mounting a tool detachably, a housing 20 for mounting the spindle shaft rotatably such that the spindle shaft is oriented to a different direction with respect to the drive shaft 3 of the spindle unit, a gear train for transmitting the drive power of the spindle unit to the spindle shaft of the angle spindle attachment. a collet means 29 for retaining and releasing the tool that is movable between a position for retaining the tool and a position for releasing the tool so as to interlock the rotation of the spindle shaft, and a switching means 24,16 for switching the collet means between a operative condition to permit the tool to be retained and released and an inoperative condition for mounting the tool undetachably.

Abstract: Tool extension and stability in milling machines is enhanced by providing a spindle extension having a housing attached to the mill head and an arbor rotatively mounted in a bore formed in the housing. The arbor, which is significantly longer than conventional arbors, is supported by first and second bearing assemblies and includes a substantially cylindrical body portion with an integral shank formed on one end thereof for connecting the arbor to a machine tool spindle. A cutting tool is attached to the other end of the arbor.

Abstract: The present invention provides a machining head attachment for a milling machine which is able to travel along five axes movement. The machining head attachment generally includes a driving spindle which is detachably connected to the milling machine, and a driven spindle operationally attached to the driving spindle. The driven spindle is able to selectively pivot about two axes of movement. As a result is able to be positioned at any point along a hemisphere.

Abstract: A variable speed milling machine attachment, and a method for its use, that is efficiently configured for minimal reduction of the spindle-to-table distance of a milling machine, such as the well-known Bridgeport miller, and which when attached to a milling machine having a maximum spindle speed of approximately 5,000 rpm, allows an operator to perform high speed milling, grinding, drilling, and engraving functions at selected sustained spindle speeds greater than 5,000 rpm, up to and including sustained spindle speeds in excess of 20,000 rpm. The attachment also has a visual display that provides an operator with indications of actual spindle speed for precise initial selection of the proper spindle speed for an intended machining task.

Abstract: A working machine includes a base having a working table for supporting a work piece and having a tool disposed on top for moving downward to machine the work piece. A block is secured to the base and has another tool for being selectively rotated to machine the side portion of the work piece. The another tool may be selectively driven by a motor which may drive the tool for moving downward to machine the work piece. The block has a screw driven slide to engage with the track and includes two followers for allowing the block to be secured to different vertical tracks.

Abstract: An automatic tool changer provides an attachment to be easily clamped if the attachment is mounted to a spindle head. Conical disk springs are arranged between the bevel gear for rotating a tool spindle supported by bearings at the center of an attachment body and the spline shaft projecting from the lower end of a shank member of the attachment to be mounted to the main spindle and inserted into the central part of the bevel gear. If the shank member is drawn up by a collet, the conical disk springs are compressed, and large diameter coupling provided at the attachment body engages with a large diameter coupling provided at the lower end face of a spindle ram. The attachment is thereby fixed to a spindle head and the turning torque of the main spindle is transmitted to a tool held by the attachment.

Abstract: The machine tool includes a spindle rotor, a tool receptacle and a clamp for clamping a tool in the tool receptacle. The clamp is moveable in the direction of the spindle axis by a spindle drive which is actuated by rotation of the spindle rotor. A spreading member is provided in the tool receptacle for positive gripping and clamping of the tool. The spindle drive preferably includes an externally threaded section on the spreading member and an internally threaded section on the tool receptacle, the latter being non-rotatably joined with the spindle rotor.

Abstract: An angle spindle attachment for a vertically movable spindle unit is provided for rotating a cutting tool in a generally horizontal orientation. The attachment includes a spindle assembly having a drive train that is mechanically independent from the drive train of the vertically movable spindle unit, and a connector block for detachably connecting the spindle assembly at a transverse angle with respect to the vertically movable spindle unit. The connector block may include an angular adjustment mechanism that allows the spindle assembly to be oriented at an angle above or below the horizontal, as well as a rotational adjustment assembly that allows the spindle assembly to be pivotally adjusted about the axis of rotation of the vertically movable spindle unit.

Abstract: A multi-purpose routing jig comprised of a set of box type truss members which can be made of plywood or the like and may be assembled with butt joints, glue, and screws or bolts, which members can be quickly assembled or disassembled without use of other tools. The structure of the jig comprises the series of truss members which when fastened together in its primary bench-type configuration holds the router internally, in inverted position, with the bit positioned for easy and accurate access to various workpieces. The jig can fasten together in different configurations to make a) a router table and fence, b) a freehand router table, c) a joint maker or horizontal router, c) an overhead router, d) a dado and rabbet cutter, e) an edge guide, and f) an extended portable router base.

Abstract: Apparatus for cutting a workpiece includes a rotatable cutting tool, a rotatable spindle for rotating the cutting tool, and a quick-connect and disconnect kinematic coupler for releasably coupling together the rotatable cutting tool and the rotatable spindle. The kinematic coupler includes a plurality of projections which cooperate with and enter a corresponding number of grooves to precisely place the cutting tool relative to the spindle and prevent relative movement between the cutting tool and the spindle.

Abstract: A multi-function machine tool provided with a motor-driven spindle on which each of a plurality of sub-motor units having individual drive motors and tools, respectively, can be removably mounted to perform a plurality of machining operations in order to comply with a change in the machining conditions and a change in the material of workpieces to be machined. The drive motors of the sub-motor units exert different output performances, i.e., different rated rotating speeds and different output torques, and can be electrically connected to the electric powers lines and control signal lines provided for the spindle head.

Abstract: A machine tool extension joins a machine tool to a spindle on a milling mine. The machine tool extension has an extension collar with a cavity therethrough and a mouth at either end for joining the collar to the milling machine and the machine tool. An extension shaft is disposed within the extension collar for mounting on the spindle. The shaft has a bar aperture extending axially therethrough. A draw bar is disposed within the bar aperture for holding the machine tool against the extension collar and shaft. The machine tool extension allows machining of parts with deep cavities.

Abstract: A horizontal insert designed for horizontal insertion in a universal turret milling machine, particularly Bridgeport-type milling machine, to facilitate performance of horizontal milling, drilling, boring and tapping operations, as well as standard vertical machining operations, in one setup. The horizontal insert is characterized by a generally cylindrical quill housing designed for insertion between the bottom column element and top ram element of a Bridgeport-type milling machine or secured to a plate so mounted. In the first embodiment the bottom surface of the quill housing is bolted to the top surface of the column and the upper surface of the quill housing is bolted to the bottom surface of the turret.

Abstract: An improved tool pulling force magnification mechanism for use in a spindle is disclosed. It comprises: (a) a draw bar contained in the hollow portion of the spindle shaft, the draw bar having a front end and a back relative to a tool to be pulled; (b) a spring sleeved on the draw bar at the back end thereof, (c) a slider located at the back end of the draw bar behind the spring to receive a squeezing force therefrom, the slider is provided with a first ring slot having a first forwardly tapered surface on an outer surface thereof; (d) a second ring slot having a second forwardly tapered surface formed on an external surface of the hollow portion of the shaft near the first forwardly tapered ring slot; and (e) a recess provided at the back end of the draw bar having an end face.

Abstract: Mechanical energy is supplied to an implement on a rotating spindle, and a generator on the implement converts the mechanical energy into electric power. Preferably the energy is supplied in the form of rotary motion via the work spindle. Alternatively, a fluent medium, for example, coolant or compressed air, can be supplied, in which case the medium is used to drive a turbine wheel coupled to the generator.

Abstract: A machining head presenting a hollow body in turn presenting a first crosspiece with a seat for supporting in sliding manner a motor-driven tool spindle. The body also presents a second crosspiece fitted with means for axially displacing the spindle which may be of different lengths and is driven by an electric motor via a screw-nut screw pair located between the second crosspiece and a third crosspiece connected removably to the spindle. The second crosspiece presents an end portion pivoting by means of a pin on an appendix of the hollow body, and is fitted to the body by means of a pair of locating pins and a pair of screws. By disconnecting the third crosspiece from the spindle and rotating the second crosspiece about the pin, the spindle may be changed without removing the machining head from the machine. The locating pins are removed from their respective seats by means of a key in the form of a screw and normally housed in a seat on the crosspiece.

Abstract: A quick change gear box for a hardware drilling machine includes a mounting plate having a catch pin bore hole and coupling bolt recesses provided with a coupling bolt bore hole and a coupling bolt slot having an upper surface. A fastening plate is provided with a spring biased catch pin insertable in the catch pin bore hole and spring biased headed coupling bolts receivable through the coupling bolt bore holes into the coupling bolt recesses. The coupling bolts are moveable in the coupling bolt recesses between an uncoupled position and a coupled with the coupling bolt heads urging a clamping force toward the fastening block on the coupling bolt slot upper surface. The coupling bolt slot upper surface ascends from one end of the coupling bolt recess to its other end, and the clamping force is increased by movement of the coupling bolt in the recess from the uncoupled position to the coupled position.

Abstract: An operating head for automatic machine tools, which includes a fork fitted on a support having various degrees of freedom; a mechanism for the numerical control of rotation of the fork around its axis; a support for a chuck, being fitted up on said fork and rotatably relative to it around an axis which is orthogonal to the former, under a numerical control; a shaft coaxial with the axis of rotation of the support for the chuck and connected, by the use of bevel gears, at one end to devices for the transmission of motion and, at its other end, to the shaft of the chuck wherein devices are provided for allowing change of the angular position of both the fork and support for the chuck, keeping the tool in contact with the piece to be machined.

Abstract: A spindle head for a tool turret has a housing in which a spindle is mounted rotatably. A rotation lock for the spindle includes a bushing arranged to be longitudinally slidable but nonrotatable on the spindle. A securing element is provided on the bushing. The bushing securing element, in its work setting, engages a securing element on the housing, limiting the axial movement of the bushing relative to the housing in the direction of the form-locking engagement of the two securing elements, and can be disengaged by an axial movement of the bushing counter to the force of a prebiased spring in a direction away from the housing securing element. At least some of the cooperating surfaces of the securing elements in the work setting are inclined with respect to the axial direction to a degree that excludes self-locking.

Abstract: High speed cutting with machine tools is achieved with readily available bearings of a small diameter by mounting and presetting the cutting tool directly in a spindle of a spindle unit without employing a tool holder. Preferably, the spindle unit is small like a tool holder and can be easily changed with conventional kinds of tool changing apparatus. The elimination of the tool holder allows the conventional bearings to be kept small so that they may be operated at high speeds, e.g., 20,000 to 40,000 rpm, without excessive heat that would damage the bearings.

Abstract: A separable rotary tool adapter consists of a low-speed rotary unit (A) having casings (1, 2); a first rotary shaft (3) in the casing connectable to a driving shaft of the machine tool and a second rotary shaft (5) orthogonally drivingly connected to the first shaft; a high-speed rotary unit (B) having a casing (15) detachable to the casing of the low-speed rotary unit (A); a rotary shaft (20) in the casing of the high-speed unit having a free end portion (23) connectable with a rotary tool; and a planetary roller mechanism having two parts engageable with and disengageable from each other in the axial direction, each part being cooperatively associated with one of the high-speed rotary shaft and the second rotary shaft. In the low-speed rotary unit (A), a first part of the planetary roller mechanism is attached to the second rotary shaft (5) engaged with the first rotary shaft (3) at right angles via a transmission mechanism and includes planetary roller driving retainers (9) or shaft pins (10).

Abstract: In a milling machine or the like having a socket for a removable arbor having, a frictional engaging member is positioned around the removable arbor such that the frictional engaging member is positioned between the removable arbor and the spindle when the arbor is inserted into the spindle. A flange is positioned below the clamping member on the removable arbor to limit the downward motion of the clamping member and to communicate with the spindle to limit the inward placement of the arbor within the spindle. A sleeve connects the arbor to a drawbar and a drive collar engages the arbor with the spindle for rotation.

Abstract: An apparatus for operatively coupling a rotatably driven machine tool accessory, such as a right angle milling head, to a machine tool having a rotary output shaft, such as a horizontal boring machine. The apparatus includes a first collar that is mounted to the horizontal boring machine in a position that is adjacent to the rotary output shaft thereof. A second collar is mounted to the machine tool accessory and is adapted to mate with the first collar. Cylinder actuated ball locking devices are provided in the second collar and are adapted to be received in corresponding receptacles in the first collar. The cylinders are adapted to cause the ball locking devices to engage the receptacles in the first collar to thereby secure the first collar to the second collar. To disengage the second collar from the first collar, the cylinders are retracted to permit the ball lock devices to disengage the receptacles in the first collar.

Abstract: Machine tool with a driving spindle held in a carrier, an exchangeable machining head that can be coupled with the carrier and a tool spindle in the machining head that can be coupled with the driving spindle and adjustment and locking means on the carrier for locking the machining head onto the carrier. The machining head can be withdrawn from a magazine for machining heads by means of said adjustment and locking means and it can be coupled with and locked onto the machine tool and, after releasing, it can be brought into any desired angular position relative to the machine tool and locked again.