Abstract: In a core bit formed with a boring blade at a front end thereof and integrally formed with a mounting portion, at a rear end portion thereof, formed with a guide portion in a cylindrical shape mounted to a chuck portion formed at a concrete drill, a ring-like seal member forming a seal between the mounting portion and a side of the chuck portion is formed at the guide portion in the cylindrical shape of the core bit.

Abstract: A mounting seat (1) for machine-tools allowing coaxial engagement of the shank (2c) of a toolholder member (2) includes internally a cylindrical bush (3) supporting a plurality of ball bearings (4i) arranged without play between the internal surface (1i) of the mounting seat (1) and the external surface (2e) of the shank (2c). The bush (3) is able to perform an axial sliding movement (S) towards the outside of the mounting seat (1) over a length smaller than or equal to the axial length of its zone occupied by the ball bearings (4i), further axial travel thereof being prevented by end-of-travel stop elements (3s, 1r) and the abovementioned bush (3) having, mounted on it, elements able to prevent separation of the ball bearings (4n) when the zone thereof occupied by the latter is located outside of the mounting seat (1).

Abstract: A drill chuck has according to the invention a chuck body centered on and rotatable about an axis and having a rear end formed with an axially forwardly facing shoulder, a plurality of jaws radially displaceable in the body between a closely spaced tool-gripping position and a widely spaced tool-releasing position, and a tightening sleeve rotatable about the axis on the body and coupled to the jaws for displacing them between their positions on rotation of the sleeve on the body. An annular closure disk has an inner periphery formed with a radially deflectable part engaged axially rearwardly with the shoulder and locking the disk on the body.

Abstract: A drill chuck has a chuck body rotatable about a chuck axis and having a rear end adapted to fit with a drive spindle and a front end formed with a tool recess. A plurality of jaws angularly spaced on the body about the axis and exposed in the tool recess are radially displaceable relative to the body between inner and outer positions. A tightening ring is axially fixed but rotatable about the axis on the body. Screwthread formations between the tightening ring and the jaws can move the jaws radially together and radially apart. A tightening sleeve surrounding the body and connected to the tightening ring is adapted to be gripped by hand to rotate the ring in the directions. A shield sleeve surrounds the body between the tightening sleeve and the body front end and is supported on the body for rotation thereon about the axis independently of the body and of the tightening sleeve.

Abstract: A coupling device for engaging an exchangeable tool support (7) for corotation with a shaft (2) of a motor (1), with the shaft (2) mounting at is driven end a hollow shaft projection (3) for receiving the tool support (7). Alternatively, the tool support (7) can mount the hollow shaft projection for receiving the driven end of the shaft. The shaft (2) and/or the tool support mounts a locking device for securing the tool support (7), and which is actuated by centrifugal force. The coupling device is designed and constructed so as to permit a simple mounting of even heavy tools to the output shaft of the motor, and a reliable connection of the tool and drive.

Abstract: The present invention provides a capped collet and a cap attached to the collet, which are capable of efficiently supplying a cooling fluid to a tool according to the type of the tool held therein, and of performing satisfactory cooling. The capped collet comprises: a collet body 10; a cap 11 which is attached to the top-end side of the collet body 10 in an attachable and detachable manner and which allows the tool to pierce therethrough; and a sealing member 12 placed between a tool holder 101 and the cap 11 in order to hermetically seal a space between them. The collet body 10 has a slot 13 formed at least from the top-end side thereof, and an annular projection 21 which is formed on the top-end side and which is coupled with the cap 11. The cap 1 has an annular groove 18 for coupling with the annular projection 21 of the collet body 10, and a cover 22 for covering the end face of the collet body 10 on the top-end side.

Abstract: A collet chuck assembly includes a mount, a selectively-axially-movable collet closing sleeve, and a multiple-segment collet head. The collet head includes two axially-spaced outer circumferential cam surfaces that engage two axially-spaced inner circumferential cam surfaces of the closing sleeve. A quick-release cap attached to the mount includes two inwardly-radially-extending tabs that engage two outwardly-radially-extending lips of the collet head to prevent the collet head from moving axially relative to the cap. Flat resilient collet seals are disposed between each set of adjoining collet segments to prevent debris from getting into the collet chuck assembly between the segments. The collet seals maintain full-surface contact with adjoining segments even when the collet head is fully opened. A slinger bore formed in the cap directs debris radially-outwardly out of the collet chuck assembly.

Abstract: A drill has a drive-unit housing having an end wall, a drive-unit spindle projecting along an axis from the wall, and a chuck body fixed to the spindle, formed with an axially forwardly open tool recess, and formed with a plurality of angled guide passages opening forward into the recess. Respective jaws displaceable in the passages are engageable in the recess with a tool. a rear plate mounted on the chuck body axially rearward of the jaws and projecting transversely of and closely axially juxtaposed with the housing end wall is formed with a hole communicating with at least one of the passages and having an outer end radially outside the end wall.

Abstract: A clamping sleeve/tensioning device comprises a clamping sleeve that is positioned inside a conical centering opening of a housing body. A chucking mechanism with rotational body is used to tighten or release the clamping sleeve. The rotational body is provided with a central opening, having an internal thread or an external thread, which directly engages in the clamping sleeve. The rotational body preferably is supported via a roller bearing on a corresponding bearing surface of the housing body. The rotational body is driven via a reducing gear, for example via a worm. As a result, high tensioning forces can be generated in connection with the relatively small diameter of the tensioning thread and the small conical angle. The small diameter of the tensioning thread ensures a low thread friction.

Abstract: A screw driving tool including an axially displaceable, drive spindle (5) located in the housing, a bit holder (6) having a shank (7) which releasably connects the bit holder (6) with the drive spindle (5), an axially adjustable depth stop (9) surrounding the bit holder (6) and a portion of the drive spindle (5) and connectable with the tool housing (1), and a sleeve-shaped dust-repelling member (13) arranged between the depth stop (9) and the bit holder (6) and releasably connected with the bit holder (6).

Abstract: A lockable drill chuck has a body centered on and rotatable about an axis and formed with a plurality of angled guides opening axially forward at a front chuck end, respective jaws axially and radially displaceable in the guides and each formed with a row of teeth, and a tightening ring axially fixed but rotatable about the axis on the body and having a screwthread meshing with the teeth so that rotation of the inner ring on the body in a tightening direction displaces the jaws in their guides toward one other and rotation in a loosening direction displaces the jaws away from one other. A one-piece outer sleeve rotatable about the axis on the body is formed unitarily with a pressed-in radially inwardly projecting cam formation.

Abstract: A power drill housing and chuck rotation indicator arrangement in which the power drill housing is formed of two symmetrical shells abutted against each other, the shells each having a front end terminating in a chuck guard defining a respective semi-circular mouth adapted to receive the chuck assembly of the power drill, keeping the chuck assembly protected within the chuck guards.

Abstract: The present invention provides a capped collet and a cap attached to the collet, which are capable of efficiently supplying a cooling fluid to a tool according to the type of the tool held therein, and of performing satisfactory cooling. The capped collet comprises: a collet body 10; a cap 11 which is attached to the top-end side of the collet body 10 in an attachable and detachable manner and which allows the tool to pierce therethrough; and a sealing member 12 placed between a tool holder 101 and the cap 11 in order to hermetically seal a space between them. The collet body 10 has a slot 13 formed at least from the top-end side thereof, and an annular projection 21 which is formed on the top-end side and which is coupled with the cap 11. The cap 1 has an annular groove 18 for coupling with the annular projection 21 of the collet body 10, and a cover 22 for covering the end face of the collet body 10 on the top-end side.

Abstract: A power drill housing and chuck rotation indicator arrangement in which the power drill housing is formed of two symmetrical shells abutted against each other, the shells each having a front end terminating in a chuck guard defining a respective semi-circular mouth adapted to receive the chuck assembly of the power drill, keeping the chuck assembly protected within the chuck guards.

Abstract: Power drivers are commonly used in production to tighten fasteners such as nuts and bolts. The socket which engages the fastener is normally coupled to the drive shaft of the power driver by a square male end on the drive shaft and a complementary square female connector on the socket. These components are not produced to close tolerances and as a result there is substantial play permitting misalignment of the rotational axes of the drive shaft and the socket and some rotational freedom between the drive shaft and the socket. In accordance with the invention an anti-vibration adaptor is provided comprising a sleeve containing a cylinder of resilient material which surrounds a portion of the drive shaft and a portion of the socket, including the point of coupling, sufficiently closely to minimize misalignment of the rotational axes of the drive shaft and the socket and reduce rotational freedom.

Abstract: This invention discloses a chuck apparatus actuated by a fluid including a body, a plurality of master jaws slidably mounted in the body, a fluid driven piston mounted for axial motion relative to the body along an axis, the piston comprising a plurality of bores extending therethrough along bore axes inclined with respect to the axis, and a plurality of shafts, each slidably mounted in one of the plurality of bores and being coupled to one of the master jaws, and wherein axial movement of the piston along the axis causes the plurality of shafts to move and to cause the plurality of master jaws to move therewith.

Abstract: A pneumatic tool kit including a main body, a threaded plug, a connecting seat, at least one grinding member, a protective cover, a saw disk seat, an adjustment seat, at least one edge-milling tool, a stopper board and at least one drilling/milling tool. By means of the tool hole of the main body and the connecting seat, four different kinds of tools can be respectively installed on the main body for four different usages including engraving, cutting, edge-milling and drilling. Therefore, the main body is usable for four kinds of usages so that the manufacturing cost for the tool is lowered. In addition, by means of the pneumatic motor of the main body, the tool kit has longer and more stable using life.

Abstract: A tool holder includes a holder body having a first section to be attached to a machine and a second section coaxially exteding from the first section, a ring in which part of the holder body is received, and an assembling device for removably assembling the ring to the holder body. The holder body further has a contacting portion facing the machine side and with which at least part of the ring is brought into contact.

Abstract: The invention concerns a clamping device for securing a draw-in nipple (12) to a clamping plate, having a receptacle (11) into which the draw-in nipple (12) is insertable, and having a clamping mechanism in order to immobilize the draw-in nipple (12) in the receptacle (11), and is characterized in that at least one air delivery conduit (23), connectable to a compressed air source, opens into the receptacle (11).

Abstract: Power drivers are commonly used in production to tighten fasteners such as nuts and bolts. The socket which engages the fastener is normally coupled to the drive shaft of the power driver by a square male end on the drive shaft and a complementary square female connector on the socket. These components are not produced to close tolerances and as a result there is substantial play permitting misalignment of the rotational axes of the drive shaft and the socket and some rotational freedom between the drive shaft and the socket. In accordance with the invention an anti-vibration adaptor is provided comprising a sleeve containing a cylinder of resilient material which surrounds a portion of the drive shaft and a portion of the socket, including the point of coupling, sufficiently closely to minimize misalignment of the rotational axes of the drive shaft and the socket and reduce rotational freedom.

Abstract: A sealed chuck assembly having a hollow cylindrical chuck body including a radially disposed front wall and a plurality of master jaws supported on the chuck body to move radially within openings in the front wall and relative to the chuck body in response to operation of a jaw actuating mechanism contained within the chuck body. A canopy plate attached to the chuck body overlies the front wall and has apertures therethrough in general registry with the openings. The master jaws are exposed within the apertures to facilitate attachment of a top jaw to each master jaw. Annular sealing members disposed between the rear surface of the canopy plate and forwardly facing surfaces on the master jaws seal each of the openings in all positions of the master jaws relative to the chuck body. Top jaws may be secured to and removed from the master jaws without disturbing the sealing members so that the openings in the front wall of the chuck body remain in sealed condition at all times.

Abstract: A tool holding device comprising a tool pot in which an interchangeable tool is releasably fitted and removed, a ball holder firmly fitted in the tool pot and having a guide surface around which a shank portion of the tool is releasably fitted for radially advancing and retracting balls in said ball holder for attachment and detachment of a tool relative to the tool pot and a slide pin in the tool pot to move said balls radially outward to engage the shank of the tool being attached and for movement in an opposite direction for releasing said tool.

Abstract: A collet is provided to grip a workpiece with a uniformly distributed gripping force. The collet includes a plurlity of circumferentally spaced-apart radial slots extending partly through the collet and at least one opening extending radially all the way through the collet and lying between the end surfaces of the collet. Shim slots are formed in the end surfaces and a shim is mounted in the two shim slots to extend across the opening to block debris from moving therethrough. Coil springs are provided to bias a pair of collet segments to engage an actuator member of a machine-tool chuck. Methods of making the collet are also disclosed.

Abstract: A chuck device for a power tool includes a follower rotatably and slidably received in a tube and coupled to and driven by a power tool and having a hole for receiving a driving stem. One or more balls are slidably received in the follower and may be forced inward of the follower to engage with the driving stem for allowing the driving stem to be driven by the follower. The balls may be disengaged from the driving stem when the ball is received in the annular recess of the tube for preventing the driving stem from being over-driven by the power tool.

Abstract: A tool holder having a holder body, a collet, an intermediate rod, a clamp bolt and a pull stud. The collet and the intermediate rod are integrally connected by screwing. A spacer is mounted to the front end of the holder body and has an opening hole with a diameter nearly matching with the diameter of the shank portion of the cutting tool. In the opening hole, a tapered groove portion with an enlarged diameter portion on the rear and a reduced diameter portion on the front is formed, and in this groove portion, a sealing O-ring is mounted. A cap for holding the spacer is screwed down to the front portion of the holder body, and the cap and the holder body come in pressure-contact at each other's tapered surfaces.

Abstract: A guard ring having a center bore mounts on a face of a spindle of a machine tool having a taper socket drive, and a bore for receiving and driving a tool holder. A drive between the guard ring and the tool holder engages before a power drawbar of the machine tool spindle engages the tool holder. The guard ring is of an axial length such that the tool holder is within the center bore of the guard ring before the tool holder is driven by the power drawbar of the machine tool.

Abstract: A sealed collet having improved radial flexibility is provided for facilitating removal from a locknut of a chuck assembly. The sealed collet includes a collet body formed from a tubular configuration of elongated gripping fingers separated by elongated slots which render the body radially resilient in response to pressure applied by a locknut. The slots are filled with a bonding agent, which may be a silicon rubber compound, for preventing dirt and debris from entering the collet slots and for preventing pressurized coolant intended to flow through a bore in a tool shank from flowing through the walls of the collet body. To increase the radial compressibility of the collet, agent-free gaps are provided in the slots immediately behind a distal portion of the collet body. In the preferred embodiment, the length of the agent-free gap is between 20% and 30% of the overall length of its respective slot.

Abstract: A pneumatically driven chuck for clamping and unclamping a tool holder of a machine tool, especially an electric discharge machine, said chuck including a mechanical clamp for clamping said tool holder, a first air chamber for receiving opening air for releasing said mechanical clamp, a second air chamber for receiving cleaning air to provide pneumatic clamping of said tool holder, and a release valve in pneumatic communication with said first and second air chambers to release cleaning air pressure from said second air chamber when opening air is provided to said first chamber. The pneumatically driven chuck may replace a spring driven chuck without any change in the control or in the program of the EDM.

Abstract: A drive collet assembly for an internal thread producing tap. The collet includes a collar that is attached to the stem of the tap using set screws. The collar is received into a recess of the body portion of a drive collet and retained therein using a spring clip. A smaller diameter aperture extends into the body portion above the recess, the aperture receiving a portion of the stem of the tap, the portion has a pair of opposed flats thereon. At least two laterally extending threaded apertures intersect the smaller diameter aperture and each receive a rigid button, a flexible element and a set screw. The set screw can be adjusted to provide a desired breakaway torque which will protect the tap from breakage should an over-torque condition occur. The flexible element will allow the rigid buttons to be forced outwardly so that the drive collet assembly spins freely about the jammed tap, rather than twisting it off.

Abstract: A protective cover comprising a tool covering portion and a pressure contact tube portion. The pressure contact tube portion is formed on its periphery with a multiplicity of resilient pieces. When the pressure contact tube portion is fitted over a front end portion of a tool holder, the resilient pieces come into pressure contact with a cylindrical case and a chucking nut, both of the tool holder, whereby the protective cover is securely attached to the tool holder.

Abstract: A chuck system for machine tools with a rotating jaw chuck has clamping jaws of the jaw chuck which can be radially adjusted relative to an axis of rotation. The clamping jaws are displaceably mounted in a bearer connected with a drive shaft, and in which engagement openings for the introduction of an adjustment tool for the positioning of the clamping jaws are arranged in the region of the bearer. The bearer is surrounded by a protective sheath that is guided so as to be displaceable in the direction of the axis of rotation. The protective sheath comprises through openings, which are arranged so as to be congruent to the engagement openings in a handling position of the protective sheath, and are arranged so as to be offset to the engagement openings in an operating position of the protective sheath. In the operating position, the clamping jaws are radially surrounded, at least in regions, by the protective sheath.

Abstract: Workholding apparatus for mounting a workpiece (6) on a machine tool, the apparatus comprising a diaphragm chuck portion (2) and a tailstock portion (4). The chuck (2) includes a backing ring (70) with face portion (74) attached to the diaphragm (44) with the backing ring (70) having a centering locator guide (76) for centering and stopping the axial advancement of a workpiece in the chuck (2). The chuck (2) also includes a support ring (106) including material (109) located at the periphery thereof for sealing the area between the chuck and the workpiece and dampening vibrations brought about by the machining process. The tailstock portion (4) comprises a rotatable tailstock support (112) having at least one workpiece seating surface (117). The tailstock includes a centering locator guide (114) extending axially from the tailstock support (112) and having a generally curved outer surface (115) for centering the workpiece in the chuck (2).

Abstract: A non-impact keyless chuck suitable for use with manual or powered drivers is disclosed. The chuck comprises a body which carries a rotatable split nut having a relatively fine thread and a plurality of slidable jaws, which may be identical, driven by the rotatable nut. An anti-friction bearing is disposed between the rotatable nut and a bearing thrust ring mounted on the body. A clutch or torque limiting mechanism is provided to limit the tightening torque to a predetermined value while the loosening torque may be limited or unlimited. The front sleeve, and rear sleeve, if used, may be formed from a structural plastic to reduce manufacturing costs. A relatively soft elastomeric grip boot may be placed on the front sleeve to improve the grip and temporarily restrain and center the tool during chuck tightening or loosening operations. A relatively soft elastomeric grip boot may also be placed on the rear sleeve, if used.

Abstract: Collet includes a housing having a wall with external and internal surfaces, having opposing ends, and having an internal hollow portion with at least one opening; and a flap internal of the opposing ends of the housing in the wall and over part of the internal hollow portion of the housing such that, when a suitably firm force is applied from external to the flap, a suitable object such as a rotary tool bit inserted in the internal hollow portion of the housing through the at least one opening can be held securely in place at least partly inside the housing by the flap. The flap may be provided, for example, by two radial slits which may extend into the wall to coincide with the diameter of the housing and which are connected to one axially directed slit. Seal(s), for example, O-ring(s), may be provided between the flap and either end or both ends of the housing and/or internally between the tool shaft and internal collet wall. The collet can be assembled with a collet holder and rotary bit.

Abstract: The chucking ring of this invention finds its principal utility in the clamping of top jaws used in a machine tool, such as a lathe, having a chuck and equipped to machine successive workpieces. The chucking ring includes a flanged head on one end of a tubular body portion that removably receives a plug and an adjustable stop for workpieces. The chucking ring is fastened to the chuck with bolts in its inactive position where it functions as a replacement for a chip bushing. The bolts may be removed and the chucking ring rotated to its active position with the flanges on the head aligned with the master jaws for chucking by the master jaws. The top jaws are bolted to the master jaws for machining.

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 collet closer assembly for a machine tool has a body adapted to be attached to a spindle of a machine tool. A pair of bores extend into the body from opposite ends thereof. A collet is received into the bore at the distal end of the body and is immovably attached to the body. A closing sleeve extends from the distal end of the body and encircles the collet. A collet housing is attached to the distal end of the body to enclose the collet sleeve. A slide member is positioned in the bore at the proximal end of the body, and the slide member is adapted to be attached to the end of a draw bar of the machine tool. A mechanical linkage connects the slide member and the collet sleeve so that the collet sleeve moves in concert and in conjunction with the slide member and the draw bar. The collet sleeve closes and opens the collet as the collet sleeve moves forward and backward, respectively.

Abstract: A collet arrangement comprises a collet having a taper at its work-piece receiving segmented head. The collet is axially fixed relative to a chuck body by means of a screwed bush. The latter is locked axially to the chuck body by being trapped under the heads of bolts, and is locked against rotation by means of a pin. The chuck body is secured to the machine spindle. A tapered sleeve is slidable between the chuck body and the collet and is secured to a draw tube by bolts, an actuating plate and an adaptor ring. These bolts freely slide through the chuck body and can thus move the tapered sleeve in an axial direction relative to the collet so that their respective tapers cause the collet segments to grip and release the work piece. Unlike the normal draw back type of collet arrangement, the collet itself is therefore axially fixed.

Abstract: A collet chuck 1 having a chuck body 3, a collet 11 disposed in the body 3, a nose ring 23 for radially compressing the collet 11, and a locknut 30 for axially moving the nose ring 23 into compressive engagement with the collet 11 is provided with a bearing assembly 45 disposed between the nose ring 23 and the collet 11 which loads compressive forces in a direction which is advantageously parallel to the axis of rotation A of the chuck. Both the locknut 30 and the nose ring 23 include flange portions 27, 43 that confront each other with opposing surfaces 47, 49 that are complementary in shape to the spherical profile of the ball bearings 50 and which traverse a line L parallel to the axis of rotation A of the chuck. The collet chuck 1 further includes O-rings 61, 65 disposed between the nose ring 23 and the locknut 30both in front of and behind the ball bearings 50 for sealing the bearing assembly 45 against dust and debris and retaining lubricant.

Abstract: A chuck includes a body having a vertical chamber for slidably receiving a plunger and having a lateral channel for slidably receiving a pair of jaws. The plunger includes a pair of inclined slots for slidably engaging with a pair of inclined extensions extended from the plunger such that the jaws may be moved toward each other or moved away from each other when the plunger is moved along the chamber. The slots include a cylindrical and smooth inner surface and the extensions each includes a cylindrical and smooth outer surface such that the extensions and the slots may be easily manufactured.

Abstract: A removable nosepiece for a chuck includes a plastic and/or metal ring which is removably mounted on a distal portion of either the main body or a sleeve of the chuck so that the ring is concentric with the central longitudinal axis of the chuck. The removable nosepiece may include a washer-shaped member of rubber extending radially inwardly from the plastic and/or metal ring. If provided, the rubber washer resiliently engages and centers a tool inserted into the chuck through the central aperture of the washer.

Abstract: Disclosed is a torque-adjustment controller for use with a tool to safely adjust and control the torque the tool works on a workpiece. The torque-adjustment controller mainly consists of a housing, an output shaft, an input shaft, a stepped ring, a lugged movable member contacting the stepped ring, a torque spring disposed between the output and the input shafts. The output shaft has recesses to engage with steel balls contained on the input shaft so that force exerted on the input shaft by a tool may be transmitted to the output shaft via the engagement of the steel balls with the recesses of the output shaft. The stepped ring has multiple sets of steps providing different head drops and will cause the lugged movable member contacting it to shift axially when the stepped ring is rotated. The axially shifted movable member will further compress the torque spring to generate stronger torque or release the torque spring for the same to generate weaker torque.

Abstract: A non-impact keyless chuck suitable for use with manual or powered drivers is disclosed. The chuck comprises a body which carries a rotatable split nut having a relatively fine thread and a plurality of slidable jaws, which may be identical, driven by the rotatable nut. An anti-friction bearing is disposed between the rotatable nut and a bearing thrust ring mounted on the body. A clutch or torque limiting mechanism is provided to limit the tightening torque to a predetermined value while the loosening torque may be limited or unlimited. The front sleeve, and rear sleeve, if used, may be formed from a structural plastic to reduce manufacturing costs. A relatively soft elastomeric grip boot may be placed on the front sleeve to improve the grip and temporarily restrain and center the tool during chuck tightening or loosening operations. A relatively soft elastomeric grip boot may also be placed on the rear sleeve, if used.

Abstract: A removable nosepiece for a chuck or other similar tool holder has an outer ring of relatively hard and inflexible material such as plastic and/or metal and an inner ring of relatively soft and flexible material such as rubber. The outer ring releasably holds the nosepiece on the distal end of the chuck or other tool holder. A tool is inserted into the chuck or tool holder through a central aperture in the inner ring. The inner ring engages the sides of the tool to help keep dust and debris out of the chuck or tool holder. The nosepiece can be removed and replaced when it becomes worn (e.g., when the inner ring is no longer functional).

Abstract: A sealing collet is provided having a plurality of independent gripping jaws longitudinally disposed about a common centerline axis. The gripping jaws have exposed inner and outer faces. A resilient material is disposed between the gripping jaws and holds the jaws in a predetermined longitudinally and angularly spaced relation about the centerline axis of a collet. A continuous outer diameter seal is disposed circumferentially about the conical outer surface of the collet. The outer diameter seal is formed integral with the resilient material. A continuous inner diameter seal is also provided disposed circumferentially within the inner diameter of the collet and also formed integral with the resilient material. At least one coolant fluid channel may be defined in the resilient material in fluid communication with a coolant port defined through the face of the collet for introducing cooling fluid onto the working surfaces of a tool held by the collet.

Abstract: An expanding collet assembly comprises an arbor having a flange portion for securing to a machine tool spindle and a shaft portion extending from the flange portion. The shaft portion includes a first conical surface disposed at its free end and a second conical surface disposed adjacent the flange portion. Conical surfaces are parallel to each other and disposed radially inwardly in the direction away from the flange portion. An expanding collet having alternately disposed slots to form a plurality of fingers extend inwardly from opposite collet ends and have inner conical surfaces at the collet ends that cooperate with the first and second conical surfaces. The expanding collet is axially slidably disposed around the shaft portion between a relaxed position when the collet is disposed away from the flange portion and an expanded position when disposed toward the flange portion.

Abstract: An apparatus for cutting threads in holes of fabricated parts including a vertical support shaft supporting at least one arm extended out over the part with a tap coupled to a motor on the end of each of the at least one arm. The arm is supported on the vertical shaft by a joint support which can be rotated around the vertical shaft and slide vertically on the shaft. A spring on the shaft is biased to return the joint support to a rest position. The vertical shaft can also be positioned vertically by virtue of a manually operated friction drive located in the base. These several degrees of freedom enable a user to position a tap in any one of a multiplicity of holes located over a large area of the part. A means and method for securing the tap in the tap chuck is provided.

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 sealing collet is provided having a plurality of independent gripping jaws longitudinally disposed about a common centerline axis. The gripping jaws have exposed inner and outer faces. A resilient material is disposed between the gripping jaws and holds the jaws in a predetermined longitudinally and angularly spaced relation about the centerline axis of a collet. A continuous outer diameter seal is disposed circumferentially about the conical outer surface of the collet. The outer diameter seal is formed integral with the resilient material. A continuous inner diameter seal is also provided disposed circumferentially within the inner diameter of the collet and also formed integral with the resilient material.

Abstract: A tube end preparing apparatus for precisely preparing the ends of tubes, including bent tubes. The apparatus includes a reference mechanism, a tube clamping mechanism, a cutting mechanism, and cutting head control mechanisms. The reference mechanism and tube clamping mechanism combine to precisely locate a flow tube with respect to defined reference indicia. The entire locating and clamping process not only provides accuracy and symmetry in aligning and clamping the flow tube relative to the desired reference indicia but can be accurately repeated with speed. The cutting mechanism includes a rotating cutting head mounted for longitudinal movement on a carriage. A control system controls the feeding movement of the carriage as the cutting head nears the end of the flow tube. A first stop mechanism causes a plunger to contact a micro-switch to stop the longitudinal movement of the carriage. A second stop uses a hard stop to prevent the carriage from overtravel due to momentum.