Abstract: A tool holder includes a body with a central internal threaded section, and a coolant coupling device within the tool holder. The coolant coupling device includes a threaded body section to engage the internal threads of the tool holder, a smaller diameter nose section, and a coolant passage through the device to align with a coolant passage in a cutting tool. A sealing ring around the end of the coolant passage forms a seal when the coolant coupling device abuts against a tool shank. The body section includes a wrench slot by which to turn the device for axial movement within the tool holder.

Abstract: This invention relates to a vibration dampening grinding cup for handheld grinding machines for the grinding of hard metal buttons on button bits, comprising a grinding head and a shaft made with a common axial channel for cooling medium, which distinguishes in that the shaft is formed with a driver part at its free end and an annular groove between this part and the grinding head, and that a bushing of rubber is arranged on the shaft adjacent to the grinding head, and a holder for such a grinding cup, which distinguishes in that it comprises a substantially cylindrical socket with an axial through channel, whose one end is connected with the rotor of the handheld grinding machine and through the other end of which shaft of the grinding cup is intended to be entered for installing the driver part of the shaft in a correspondingly formed driving part of the channel of the socket and to be fastened through introduction of balls situated in holes in the wall of the socket at the other end of the socket into the

Abstract: A tool holder comprises a receptacle having one end connectable with a machine spindle, to a receptacle and the like and an opposite end, a head provided on the opposite end and having a coaxial cylindrical head opening, a housing received non-rotatably and axially longitudinally displaceable in the head opening and having a coaxial cylindrical housing opening, a quick exchange insert for a tool insertable in the housing opening and coupleable with the housing, and an inner signal device reacting to a relative movement between the head and the inserted quick exchange insert to produce a disturbance signal which identifies a damaged or a destroyed tool.

Abstract: A tool holder holding in a fluid supply hole 3d having an inner diameter a tool 1 having the diameter of identical with or smaller than said inner diameter through a collet 2, wherein a fluid can be supplied from the fluid supply hole 3d to a fluid channel 1c of the tool 1, in the fluid supply hole 3d, a seal block 11 as a regulating means which regulates a flowing amount of the fluid to the fluid channel 1c of the tool 1 and the flowing amount of the fluid to the gap between the fluid supply hole and the tool 1 is provided slidably in the longitudinal direction of the fluid supply hole. The seal block 11 adheres close to the end of the tool 1 due to the fluid pressure in the fluid supply hole 3d and the fluid is supplied to the close adhesion portion, thereby the fluid flowing amount to the channel 1c of the tool 1 can be regulated.

Abstract: A cutter body includes an elongate, generally cylindrical chuck for gripping a cylindrical cutter, an annular cutting fluid gland surrounding the chuck, and retaining means for securing the gland longitudinally on the chuck. The cutter has a longitudinal bore therethrough defining a fluid passageway. The chuck has a longitudinal bore at least partially therethrough for gripping the cutter and defining a fluid passageway. The bore of the chuck is in fluid communication with the bore of the cutter. The chuck includes opposed ends and a medial portion disposed between the opposed ends. The medial portion includes longitudinally spaced-apart, circumferential lands which define bearing surfaces for engaging the inner surface of the cutting fluid gland. The medial portion has an opening therein defining a fluid passageway. The gland has an opening therein defining a fluid passageway.

Abstract: A universal sleeve-clamp for using interchangeable jaw pieces to clamp a workpiece has a sleeve with a plurality of radially moveable elements. Features are provided for locating and attaching the jaw pieces to the radially moveable elements so that, when a clamping taper is made to bear against the radially moveable elements, the radially moveable elements, and hence the interchangeable jaw pieces, are moved radially to clamp the workpiece. The clamping taper may be externally tapered to form an expanding mandrel, or internally tapered to form a collet chuck. The jaw pieces, which are made of soft metal or other easily machinable material, may be shaped for clamping multiple diameters, clamping thin-walled workpieces or for clamping a workpiece eccentrically. A locator plate is used to give additional support to a workpiece, or to align it in a known rotational position for static fixturing.

Abstract: A device on power tools for driving impact and/or drilling tools has a tool having a tool shaft provided with at least two drive grooves open toward a shaft end and at least one locking trough closed toward the shaft end, in which correspondingly a driver and a locking body of a tool receptacle engage. For increasing the driving, at least one axial formation is provided on a projection of the thicker portion of the tool shaft to a thinner insertion end of the tool at the end side for an additional driving, which axial formation cooperates with an axial formation, for example a tooth, of a driven part, for example an auxiliary strip, at the end side of the tool holder.

Abstract: A drilling method and a drilling apparatus of a hard brittle material in which a core drill is used for abrasive grinding of high accuracy and high durability.

Abstract: Tool-holder (5) makes it possible to rotate a tool at high speed around its axis of symmetry. Its tapered end (26) is engaged in the tapered bore (16) provided in the spindle (6). In a bore of suitable shape a clamp (2) is engaged, adapted to secure the electrode tool end (1) rigidly. An injection chamber (28) communicates with the bore and is connected by radial channels (27) to a fluid inlet. The clamp (2) has radial grooves to bring the cooling fluid (25) from the injection chamber (28) to the surface of the tool (1). A sealed circuit (12,13,15) channels the liquid; it is connected by an input channel of small diameter which passes through the spindle body (10) to a small liquid inlet in the mobile element of the machining head or in the intermediary fixing element mounted on said mobile element. An annular seal (14) of small diameter is mounted in the spindle body around said channel (11').

Abstract: A chuck assembly and drill tool for a deep hole drilling press wherein the shank of the drill is of great length and slidably received within the chuck assembly to various depths such that complete removal of the drill for the purpose of substitution with drills of different lengths is avoided. The invention also teaches means for securing the drill within the chuck at various points along the shank's length. Prevention of lubricating and cooling oil leakage is accomplished by novel packing means which are also incorporated into the chuck assembly. In another embodiment, a separate insert may be fitted to the chuck assembly to permit reception of shanks of varying diameter. Both embodiments prevent excessive vibration, fallout and whiplashing of the enclosed drill tool.

Abstract: An annular front end base portion, a main portion and an annular rear end base portion form all together a substantial portion of a collet provided with a tapered outside surface adaptable closely in a tapered hole of a collet chuck and a tool holding hole is formed in the axial portion of the collet. In the main portion are formed a first set of axially long radial slits opening at the end surface of the front end base portion and terminating to be closing in the rear end base portion and a second set of axially long radial silts opening at the end surface of the rear end base portion and terminating to be closing in the front base portion. Each of the radial slits of the first set and each of the radial slits of the second set are arranged at proper angular intervals and alternately along the peripheral direction of the collet, and respective zigzag paths are formed which are closed over the whole peripheries of the outside and inside surfaces of the collet, respectively.

Abstract: A sealing bushing is provided for use with a liquid cooled metal cutting tool of the kind having an elongated tool shaft for mounting with respect to a machine tool turret and formed with a cooling duct, the sealing bushing comprising a tubular member and an annular channel member formed integrally with and surrounding an end portion of the tubular member; the channel member being constituted by the end portion and a skirt portion radially spaced from the tubular portion and integrally coupled thereto by a flange portion, at least the skirt portion being formed of a flexibly resilient material.

Abstract: An apparatus machines a workpiece by a rotating cutting tool having at least one coolant channel extended toward the free end thereof with high-pressure coolant jetting onto the free end of the cutting tool. The coolant has sufficient pressure and flow rate to remove the heat and the chips generated during the machining. The cutting tool is fed in a path suitable for each machining operation with the cutting edges being advanced into the workpiece in a reverse direction to the feed direction. The apparatus can machine a workpiece of a material having high hardness and high toughness.

Abstract: A device for accurately supplying a fluid such as a cutting fluid to the cutting portion of a tool of any of a wide variety of tools includes a tool holder having an internal fluid passageway and a forward end formed to include an annular fluid supply groove in communication with the fluid passageway, a nozzle ring having nozzles communicating with the annular fluid supply groove, and a coupling ring, which is screwed onto the forward end of the tool holder, for fixedly fastening the nozzle ring to the tool holder in an attachable and detachable manner. A cutting fluid from a fluid supply source is fed under pressure to the nozzles of the nozzle ring through the fluid passageway and the annular fluid supply groove, and the cutting fluid is jetted from the nozzles toward the cutting portion of the tool, such as a drill, held by the tool holder.

Abstract: A machine tool comprising:a toolholder for holding a tool;a spindle for detachably supporting the toolholder;a spindle support for rotatably supporting the spindle;a drive means for driving the spindle supported on the spindle support;a stop means for preventing the toolholder from rotating relative to the spindle support; anda cutting oil supply means for supplying a cutting oil to the tool via the stop means.

Abstract: A chuck for a tool with an inner cooling medium supply has a clamp holder having a cooling medium supply passage, a clamping nut anchorable in the clamp holder, and a ring-shaped sealing meter which is carried by the clamping nut and abuts against a clamped tool, the clamping nut having an outer concentric recess which surrounds the inserted tool and is formed so that the sealing member is exchangeably insertable from outside into the recess.

Abstract: A clamp head of numerically controlled cutting tool comprising front and rear sleeves and a main shaft. The rear sleeve is provided with a channel, while the tapered main shaft is composed of oil groove and hole. The front and the rear sleeves and the main shaft are united as a unitary body. The front and the rear sleeves are further provided with a nozzle apparatus permitting the coolant to be injected with precision on the working point.

Abstract: In a self-reversing tapping attachment an improved coolant system includes at least one fluid flow orifice at the end of a fluid flow conduit contained in a drive spindle member and further includes a fluid contact member for generating force to prevent interference with the drive spindle member prior to tapping a hole. Provision is further made for self-correction of any tendency for back pressure of fluid flow to interfere with motion of the drive spindle member by provision for covering the fluid flow orifice during motion under back pressure, thereby reducing such pressure. A collector chamber and exit orifice for expulsion to ambient of coolant fluid prevent invasion of the inner mechanism by coolant under back pressure.

Abstract: A chuck for chucking predominantly chip-removing tools, such as milling cutters, drills, countersinks or the like which have a cylindrical shaft and a recessed drive surface on the shaft with stop shoulders in axial direction. A stop member inserted in a duct of the front portion of the chuck engages the stop surface, so that the chucking force acting on the tool shaft extends in axial direction and the chucking force is transmitted between the tool shaft and the front portion of the chuck by the locking member.

Abstract: A toolholder for holding a cutting tool such as a tap in the spindle of a machine tool includes a torque-limiting clutch to prevent excessive load being applied to the cutting tool. The clutch comprises at least one ball located in sockets in the driving and driven members but there is an arrangement, whereby at a predetermined critical torque, the ball moves axially out of engagement with one of the driving and driven members to disconnect the drive, and a deflecting device engages with the ball and moves it to a position where it does not encounter the socket from which it has been released or any similar sockets. This prevents wear on the clutch.The toolholder also comprises a conduit system for cutting fluid being fed into a bore in the cutting tool. The conduit extends through a telescopic part of the toolholder and includes a flexible part deviating from a straight linear form, so that it can extend by tending to straighten, in order to accommodate telescopic extension of the toolholder.

Abstract: A rotary tool holder of the type including a stationary shell adapted to be reciprocally positioned within a bushing plate and a shaft mounted rotatably within the stationary shell. An annular space is provided between the shaft and the shell and the shell includes an enlarged diameter collar portion proximate one end of the shell and a reduced diameter pilot portion extending from the collar portion to the other end of the shell. The pilot portion is slidably received in the bushing plate and the collar portion receives a pressurized coolant fitting. Needle bearings are provided in the annular space between the shell and the shaft proximate the pilot portion and a pair of annular seals are provided in the annular space between the shell and the shaft proximate the collar portion. The annular seals are positioned on opposite sides of a radial passage formed through the collar portion and through the shaft for communication with a central axial bore in the shaft.

Abstract: A chuck having a spring collet is disclosed. The spring collet has a plurality of pairs of adjacent collet segments with interstices formed between each of the collet segments. The interstices of the collet each having radially extending cutout seats with resilient stoppers received therein which extend between a tool received in the collet and the body of the chuck to prevent coolant from leaking therebetween when flowing through the collet by way of a duct in the tool. The stoppers of the collet are axially spaced from each other so as not to weaken the collet.

Abstract: A tool chuck assembly comprising a collet having a bore for supporting a tool, a collet holder having a portion circumscribing the collet, a tension nut cooperatively associated with the collet holder to mount and dismount a tool means defining a coolant channel in the collet holder, a sealing element mounted in the collet having a first peripheral sealing surface (8) engaging the inner wall of the collet holder to form a seal behind the collet and a second peripheral sealing surface engagably with the outer periphery of the tool to form a seal therewith.

Abstract: A universal fitting for electrodes for use with electric arc metal disintegrator apparatus. The fitting accommodates all sizes of electrodes used with metal disintegrator apparatus and enables electrodes as short as one inch to be used. The universal fitting connects two electrodes, such as two electrodes having different diameters and/or materials, respectively. Smaller diameter electrodes may be carried within larger diameter electrodes and only a short length of the smaller diameter electrode need be exposed to the workpiece. The universal fitting is composed of collets, a central double-ended connector for connecting a collet at each end, seals to form a water-tight connection between the collets and the double-ended connector, and retainers to secure the electrodes to the collets and the collets to the middle connector. The universal fitting may be axially aligned, or in another embodiment, form a right angle for offset work.

Abstract: A floating chuck incorporating a fluid path for irrigation fluid is disclosed. Fluid passages in the body and bush are connected by a rigid tube floatingly mounted by O-rings at each end. The O-rings are in fluid-sealing relationship with opposed, enlarged end sections of the fluid passages. The tube is shorter than the distance between the inner ends of the enlarged sections. Axial displacement and angular displacement of the bush relative to the body are accomplished without compromise to the fluid supply. The arrangement provides smoothness of movement between the bush and body and has low maintenance costs.

Abstract: Described is a boring tool cooled from within made of a tool spiral and a clamping cylinder. The tool spiral is received in an interlocking way in a recess of the clamping cylinder and is supplied with coolant over its proximal end, which lies in the recess. The tool spiral (4; 44; 74) is received in a spring chuck (12) which, on the side facing away from the clamping cylinder, carries a drive disk (22; 62; 92) that engages in an interlocking way into the grooves. Further, the chuck body (14) has a central internal thread (26) in which an adjusting screw (24) having a central recess (32) is provided, an adjusting screw (24) against which the tool spiral under sealing of its coolant channels (8; 48; 78) can be pressed against the inner space (34) of the spring chuck (12). Tool spirals consisting, for example, of hard metal can be used more economically in this way.

Abstract: The adaptor is to enable a cutting tool holder such as a boring bar to be mounted on a standard arbor having an internally screw-threaded boss and drive keys. The adaptor comprises a thrust ring, a retaining screw and a spacer. The thrust ring has a multiplicity of internally tapered recesses in its peripheral surface and is rotatably mounted on the arbor by the retaining screw. Rotation of the thrust ring is permitted to enable alignment of a respective recess with a respective locking screw in the cutting tool holder.

Abstract: A holder for a cutting tool has a main spindle formed with a bore to receive the cutting tool, a casing mounted on the main spindle, and an oil receiver stand secured to the casing. The main spindle, casing and receiver stand are each formed with an oil passage communicating with one another to feed cutting fluid to the cutting tool. The holder is characterized in that an intensifier for increasing the feed pressure of the cutting fluid is provided in an annular chamber provided around the main spindle in the oil passage to the cutting tool.

Abstract: A chuck for a cylindrical rotary metal cutting tool, such as an end mill, is provided with a liquid coolant system. The chuck is constructed to direct cooling liquid onto a cutting tool secured in an axial bore defined therein with a plurality of converging liquid streams directed at the tool. The chuck is constructed with alternative passageways. Liquid coolant may be directed along a central, axial cooling liquid passageway remote from a transverse end face of the chuck. Liquid may pass radially outwardly therefrom through radial bores and into intersecting longitudinal cooling liquid distribution ducts which are inclined toward the axis of the tool holder and which terminate in outlet ports in the end face. The radial bores are plugged at locations radially outwardly from the intersection of the ducts with the radial bores.

Abstract: A rotatable coolant supply shank, and cutting tool incorporating such shank, provided with a coolant inlet, for alignment with a ring bore, extending inwardly from the peripheral surface of the shank for positively pulling coolant towards the shank axis when the shank is coupled to the cutting tool and rotated while coolant is being supplied to the inlet from the ring bore.

Abstract: Quick change chuck systems with integral fluid inducer. A quick change drill bushing system reduces misalignment of bushing to motor spindles and enables rapid change of cutting tools and bushing thereby reducing the number of dedicated working systems. The quick change chuck system with integral fluid inducer may utilize a quick change nosepiece system in combination.

Abstract: The invention provides a holding device for a reamer tool in a machine tool, which comprises a tool holder adapted to be secured to the machine tool for rotation about a longitudinal axis, a tool receiving bushing radially displaceably guided in the tool holder, and a coupling providing a non-rotational connection between the tool holder and the tool receiving bushing. The coupling comprises a coupling disc having two radial end faces, a first one of the coupling disc end faces cooperating with a radical end face of the tool holder, a second one of the coupling disc end faces cooperating with a radial end face of the tool receiving bushing, at least a part of the coupling disc end faces and of the tool holder and tool receiving bushing end faces being configurated as planar gliding surfaces, and pairs of the gliding surfaces facing and contacting each other for transmitting axial pushing forces to the reamer tool.

Abstract: A tapper for loading a spindle of machine tools with a tap. The tapper proper has a shaft to be driven, which is supported under floating axially by means of a pair of springs the pressurizing direction of which are opposite to each other, built-in. Cutting oil is pressurized to be fed from the outside of the tapper proper through oil passages, respectively which are provided on the tapper proper and the shaft to be driven to a oil hole and, in that case, the oil passages are formed such that the resultant hydraulic pressure does not give rise to an action of breaking the floating state of the shaft to be driven.

Abstract: A rod chucking device for a perforator for perforating a pig iron discharge opening being adapted to mount exchangeably perforating rods for perforation work, such as drill rods, blanking rods and the like to the tip end of an impact rod. The chucking device has a cotter movable between an engage position and disengage position in order to fix the perforating rod inserted into a rod insert hole of a socket. A spring is engaged with the cotter for urging the cotter toward the engage position. In order to prevent deterioration of the spring through vibration and heat during the operation, chilling air passage from the impact rod to the perforating rod is separated to form an air passage to chill the spring.

Abstract: A chuck for a cylindrical, rotary, metal cutting tool, such as an end mill, is provided with a liquid coolant system. The chuck has a stationary, annular collar within which a tool holder rotates at high speed. An annular channel is defined between the collar and the tool holder and liquid coolant is pumped into the collar to the channel through an inlet on the collar. Internal ducts within the tool holder are directed inwardly at an angle from the annular channel toward an end face from which a rotary tool, such as an end mill protrudes. The ducts are also oriented at an angle corresponding to the helical spiral of flutes on the end mill and are radially aligned with troughs between the flutes. Liquid coolant, such as water, is forced from the annular channel through the ducts toward the troughs between the flutes. The liquid coolant travels all the way to the tip of the end mill to cool the bit and wash chips of metal therefrom with a minimum of water being thrown from the end mill by centrifugal force.

Abstract: Disclosed is an improved core drill and a method of detachably coupling the same to a power driving unit to expedite the removal of a core therefrom. This is achieved by equipping the rear end of the drill stem with a fixedly attached externally threaded bushing. A coupling sleeve has internal threads at either end matable respectively with the bushing threads and the threaded drive shank of a power driving unit. This sleeve and the core drill are readily detached as a unit from the power drive thereby permitting the rapid removal of the core from the rear end of the drill rather than past the cutting ring at its front end.

Abstract: A holder for a cutting tool has a main spindle formed with a bore to receive the cutting tool, a casing mounted on the main spindle, and an oil receiver stand secured to the casing. The main spindle, casing and receiver stand are each formed with an oil passage communicating with one another to feed cutting fluid to the cutting tool. The holder is characterized in that an intersifier for increasing the feed pressure of the cutting fluid is provided in an annular chamber provided around the main spindle in the oil passage to the cutting tool.

Abstract: A quick-change system for power feed and positive feed drill motors having quick-change capabilities whereby a nosepiece may be separated from the drill motor employing a quick-release coupling that does not utilize threaded means. The quick-change system utilizes a quick-change nosepiece, chuck and shank adapter means such that the oil line to a fluid inducer remains attached during nosepiece removal.

Abstract: This spade drill has an elongated holder with a standard driving configuration at one end, and adapted at the axially opposite end to receive a carrier block provided with receptacles for receiving indexable standard cutting inserts of extremely hard alloy.

Abstract: A tap extension having a dual-mode coolant delivery system is disclosed which is adapted to connect a thread-cutting tap with an associated machine tool spindle having a pressurized coolant supply. The extension includes a generally elongated shank portion, with a locking arrangement provided at one end thereof for receiving and releasably retaining a tap in driven relation with the tap extension. Notably, the tap extension includes a valve arrangement whereby pressurized coolant is directed: (1) through the axial bore of a tap in a first mode of operation, or (2) exteriorly of a solid tap to between its cutting flutes in a second mode of operation. Versatile and efficient thread-forming in either blind holes or through holes is thus facilitated by use of the present construction.

Abstract: A rotatable cylindrical extension member, and cutting tool incorporating such extension member, provided with a coolant inlet, for alignment with a ring bore, extending inwardly from the peripheral surface of the extension member for directing coolant towards the axis of the extension member when it is coupled to the cutting tool and rotated while coolant is being supplied to the inlet from the ring bore.

Abstract: A drill chuck for a hammer drill with a plurality of clamp jaws fed in feed channels to engage a drill in a tool holder, the clamp jaws being adjustable by means of a support ring, the support ring bearing a restraining casing having teeth thereon which can engage gearing in the support ring so as to lock it against further rotation. The restraining casing is lockable in two axial positions, in one position in engagement with the support ring, in the other out of engagement with the support ring. The restraining casing is slid into engagement with the support ring in a covering jacket which holds the restraining casing axially tightly so that drilling waste can not impede engagement of the restraining casing with the support ring. Cleaning passages run through the chuck body from the tool holder to the surroundings so that drilling waste will be removed from the tool holder and the chuck interior during drilling operation.

Abstract: To check the operating conditions of a power chuck, compressed air is supplied to the contact surfaces of the clamping jaws and/or of the workpiece to be clamped. Air passages are provided in the chuck body which open into the contact surfaces. The escaping air makes it possible to find out whether the contact is planar, and thus whether the clamping is exact.

Abstract: A tool holder assembly which comprises a tool holder adapted to be connected with a machine spindle for rotation together therewith, a stationary support member for rotatably supporting the tool holder and adapted to be connected to a fixed portion of the machine, a fluid supply circuit defined in the tool holder for the supply of a cutting fluid from an external source thereof towards a fluid discharge passage defined in a machine tool replaceably carried by the tool holder, and a vane-type displacement pump for forcibly pumping the cutting fluid from the fluid supply circuit to the fluid discharge passage in the machine tool for pouring the cutting fluid onto the workpiece being machined by the cutting tool. The displacement pump has its rotor constituted by a portion of the tool holder, and a pump casing constituted by a portion of the stationary support member.

Abstract: A chuck provided with a collapsible collet for holding one of a number of twist drills of different diameters is equipped with a holder for the collet, the holder being one for mounting in an appropriate power tool such as a drill press or lathe. There is a stationary sleeve within which rotate the holder, collet and drill. For lubricating and cooling the cutting operation where the drill engages the work, use is made of a pipe fitting in a boss on the stationary sleeve. A fluid line to the pipe fitting continuously supplies a cooling lubricant which flows from there through a succession of passageways in the sleeve and the holder so that the lubricant is ultimately discharged into axially extending slits of the collapsible collet. Emerging from the slits the lubricant flows over the surface of the drill until it reaches the cutting edge, the flow being in sufficient volume to wash away chips.

Abstract: The drill spindle of a deep well drilling machine has a sleeve-like extension with a conical internal surface which is complementary to conical external surfaces on an annulus of claws forming part of a clamping device which is inserted into the extension and has an axial passage for the shank of a rotary tool. A set of dished springs normally urges a ring against a conical end face of the clamping device whereby the latter urges its claws against the internal surface of the extension and the claws transmit torque from the spindle to the shank of the tool. If the transmission of torque is to be terminated, the piston of a fluid-operated motor is caused to shift the ring against the opposition of the dished springs whereby the claws relax the force with which they engage the shank and the latter can be extracted from the passage of the clamping device.

Abstract: A tool holder with a coolant inducer and a quick acting locking mechanism is disclosed. The holder body is provided with a tapered bore to receive the tapered shank of a cutting tool. The tapered shank has cam surfaces for engagement with locking pins in the holder body to cam the shank into drive transmitting and fluid-tight engagement with the tapered bore. A locking mechanism locks the tapered shank in the camming relationship with the locking pins and a retaining mechanism holds the mechanism in its locked position. A coolant inducer comprises an inducer ring at the upper end of the holder body and defining a fluid-tight chamber therewith. A fluid conduit is connected through a fitting in the inducer ring to the chamber which communicates with the upper end of the tapered bore in the holder body.

Abstract: A distributor body is idly mounted on the toolholder through rolling bearing means and a connector for feeding coolant even during the rotation; an off-center piston member on the distributor body and with a passage for the coolant is able to match the coolant plug on the machine nose; the piston can slide to engage and respectively disengage the toolholder and the distributor body upon the drawing out and respectively the fitting of the group from and into the machine spindle.

Abstract: A horizontal combined drilling and milling machine having a horizontally adjustable drilling and milling spindle, and a faceplate with a cross slide and tool cartridge. A precisely determinable supply of cooling medium to the tool is to be achieved in every position of the cross slide, and the exchange of the essential parts of the means for supplying the cooling medium to the cross slide should be effected without manual activity. For this purpose, the machine is provided with an adapter by means of which the cooling medium can be supplied via the drilling spindle and a flexible connection, such as a hose, to the radially adjustable cross slide, the cartridge, and the tool holder all the way to the shaft of the tool.

Abstract: A tool holder (10) in which coolant fluid is delivered to a driven tool (115) through a piston (220) which extends through an axial passage in the tool holder (10) and its collet or chuck (170) and is held in contact with the tool (115) by pressure of the coolant fluid. The tool holder advantageously provides an axial float in which springs mount the tool (115) to the tool holder (10) and allow the collet to follow the lead of the tool. The coolant delivery system (200), although acting in an axial direction, does not interfere with the axial "float" of the tool and collet, as the fluid pressure is chosen to be great enough to provide a face seal and small enough not to destroy the float of the tool.