Abstract: A chuck unit for a machine tool is capable of holding a workpiece installed on a spindle by workpiece holding members that move in a radial direction with respect to an axial center. Workpiece holding rods are provided at the workpiece holding member and move radially. Screw operating portions are operated by a rotating operation jig at an outer peripheral side of the chuck unit. A workpiece end face abutment moves and holds the workpiece in the axial direction.

Abstract: A chuck for use with a manual or powered driver having a rotatable drive shaft includes a generally cylindrical body having a nose section and a tail section. The tail section is configured to rotate with the drive shaft and the nose section has an axial bore formed therein. A plurality of jaws are movably disposed with respect to the body toward and away from the axial bore. Each jaw includes a back surface and a tool engaging surface opposite the back surface. The tool engaging surfaces are disposed facing generally parallel to the axis of the axial bore and a plurality of grinds are defined across each tool engaging surfaces to form a helical pattern on the tool engaging jaw surfaces when the tool engaging surfaces are disposed at a predetermined position with respect to the axis of the axial bore.

Abstract: The device serves for the end face, angularly true driving of a pre-toothed workpiece (21) clamped between work centers by the rotating work spindle (3) of a tooth flank grinding machine. It takes place by means of a wobble plate (10) connected without play to the work spindle by way of the work arbor (1), the intermediate disc (17) and the cylindrical steel rollers (13, 18), the surface of which said wobble plate which contacts the workpiece end face (29) being according to the invention coated with galvanically bonded hard material grains (24).

Abstract: A holding device includes a support frame; multiple pairs of holding fixtures mounted on the support frame; a holding fixture pulley attached to one holding fixture of each one pair of holding fixtures; at least one frame pulley attached to the support frame; a drive rope bridging between the holding fixture pulley and the frame pulley and having one end pulled in one direction and the other end fixed to the support frame; and a drive source that pulls the drive rope. With this configuration, when the drive rope is pulled by the drive source, holding fixtures constituting each one pair of holding fixtures are linked to move symmetrically to each other in a direction that holds an object to be held, each one pair of holding fixtures move independently of other pairs of holding fixtures, and the holding fixtures of each one pair of holding fixtures are movable toward and away from each other on a straight line or on two parallel straight lines on a plane of the support frame.

Abstract: A holding device includes a support frame; multiple pairs of holding fixtures mounted on the support frame; a holding fixture pulley attached to one holding fixture of each one pair of holding fixtures; at least one frame pulley attached to the support frame; a drive rope bridging between the holding fixture pulley and the frame pulley and having one end pulled in one direction and the other end fixed to the support frame; and a drive source that pulls the drive rope. With this configuration, when the drive rope is pulled by the drive source, holding fixtures constituting each one pair of holding fixtures are linked to move symmetrically to each other in a direction that holds an object to be held, each one pair of holding fixtures move independently of other pairs of holding fixtures, and the holding fixtures of each one pair of holding fixtures are movable toward and away from each other on a straight line or on two parallel straight lines on a plane of the support frame.

Abstract: A chuck body has a first surface for fixing to a support body and a second surface opposite to the first surface, and the second surface of the chuck body is provided with a pair of chuck members for chucking a workpiece and a guide rail for guiding an open and close operation of these chuck members. Further, a plurality of stationary holes for fixing the chuck body to the support body is formed at a position overlapping with the chuck members of the guide rail so as to communicate with the first surface, and each of the chuck members is provided with a work hole for inserting a screw into these stationary holes.

Abstract: The jaw assembly includes a master jaw and an insert jaw. An engagement surface on the master jaw provides a mounting surface for the insert jaw. The master jaw is contoured to provide a minimum of mass opposite the mounting surface and opposite the engagement surface to minimize the total rotating mass when the jaw assembly is in operation. In operation, a force is applied substantially perpendicular to the engagement surfaces between the insert jaw and master jaw such that the engagement surface experiences the force rather than the insert fastener.

Abstract: A clamping jaw for a jaw chuck comprises a base body of metal, wherein a hard metal clamping surface is fixed onto the base body. The clamping surface is formed of a plurality of hard metal particles of angular configuration.

Abstract: A chuck has a chuck body adapted to be rotated about a chuck axis and formed with a plurality of axially forwardly open passages each having a pair of angularly confronting side faces, respective guides pivotal in the passages about respective guide axes extending secantally of the chuck axis, and respective elongated jaw arms axially slidable in the guides. Each jaw arm has a pair of oppositely angularly directed side faces angularly confronting and spaced from the respective passage side faces. Two guide plate in each of the passages each have an outer face engaging one of the respective passage side faces and an inner face engaging the respective arm side face. These plates are releasably fixed in the chuck body.

Abstract: A chuck comprises: a chuck body attached to a spindle of a machine tool; master jaws attached to the chuck body along the normal of the chuck body and formed with T-shaped grooves extending along the length thereof; T nuts having tops and trunks, the tops being slidably fitted in the T-shaped grooves of the master jaws; gripping claws having work holding surfaces and grooves for engagement with the trunks of the T nuts; and eccentric shafts inserted into holes formed across the T nuts and the gripping claws and used for attaching the gripping claws to the T nuts. The holes extend across the T nuts and the gripping claws which are engaged with one another. The gripping claws have large reshaping margins at work holding surfaces thereof.

Abstract: A chuck has a chuck body adapted to be rotated about a chuck axis and a plurality of elongated jaw arms angularly spaced about the axis, pivotal in the chuck body about respective guide axes extending secantally of the chuck axis, and axially slidable in the body. Each jaw arm has a front outer end formed with a generally axially extending and radially inwardly directed outer face and an axially outwardly and forwardly directed inner face extending radially inward from an axially inner end of the outer face. Each outer face converges axially outward with the chuck axis and forms a small acute angle with the chuck axis. Respective jaw inserts each have a pair of faces complementary to and flatly engaging the respective jaw faces. These inserts are releasably secured to the jaw outer ends with the insert faces bearing on the jaw faces. The faces are planar. In addition each insert is formed with at least one throughgoing hole extending substantially parallel to the outer insert face.

Abstract: An expendable jaw combination for use in connection with a chuck for a lathe, milling machine, or the like to hold work stock. A receiver member is attached to the chuck, and an engagement member is provided in an elongated recess in the receiver member for engaging the stock. The receiver member is preferably constructed of tool material, such as tool steel, while the engagement member may be made of a lower cost material which is easier to work, such as mild steel. After the engagement member is used one or more times, it may be reworked or expended. Locking means are provided for securing the engagement member to the receiver member during use.

Abstract: A lathe chuck has a chuck body centered on and rotatable about a main axis and formed with a plurality of radially extending jaw-guide grooves and, transverse to the grooves, with respective guide passages each in turn formed with an abutment. Respective jaws displaceable in the grooves each have at least one tooth exposed in the respective guide passage and respective control rods displaceable along the passages each have at least one tooth meshing with the tooth of the respective jaw. A control pin is axially displaceable in each rod between an extended position projecting into the respective jaw-guide groove and a retracted position. The control pins are displaced on engagement with the teeth of the respective jaws into the retracted positions. A latch pin is axially displaceable in each rod between an extended latching position engaging the respective abutment and preventing movement of the respective rod in the respective passage and a retracted position permitting such movement.

Abstract: A clamping jaw for a tool holder chuck, wherein the clamping chuck has two clamping jaws arranged spaced apart and diametrically opposite one another relative to an axis of rotation of the clamping chuck and moveable toward and away from one another for clamping a tool shaft by moving the clamping chuck with a radial component, has a longitudinal slot having a slot mouth open toward the axis of rotation and a slot bottom. The longitudinal slot receives positive-lockingly the tool shaft and has slot flanks defining an approach angle at the slot mouth and a slot bottom angle at the slot bottom. The approach angle is greater than the slot bottom angle. The clamping jaw is manufactured with a disc milling cutter with opposed milling cutter flanks located radially outwardly and positioned slantedly relative to one another at different flank angles. The flank angles increase toward a center of the cutter body.

Abstract: A clamping jaw for a jaw chuck comprises a base body of metal, wherein a hard metal clamping surface is fixed onto the base body. The clamping surface is formed of a plurality of hard metal particles of angular configuration.

Abstract: A chuck 30 is formed with a generally cylindrical body 54 formed with a bore 60 at a forward end 58 thereof. A fixed clamp segment 134 and a movable clamp segment 166 are located in radial opposition in the bore 60. A pair of ribs 142 are formed on the fixed segment 134 and extend radially inward. A single rib 172 is formed on the movable segment 166 and extends radially inward. The ribs 142 and 172 cooperate to clamp a shank 42 therebetween in a clamping mode. A sleeve 78 is positioned about the body and is movable axially relative thereto. A camming section 88 formed on an interior wall of the sleeve 78 is captured between a head 124 of a pin 122 and a detent ring 132 to latch the sleeve in an unclamped mode. When the shank 42 is inserted into the bore 60, the forward end of the shank engages the pin 122 to move the head 124 against the camming section 88 which, in turn, moves the section past the detent ring.

Abstract: A gripping apparatus is disclosed that includes a housing that has at least two pivot trays. Each pivot tray includes a jaw cavity and a pivot pin notch. The gripping apparatus further includes at least two jaws that have a pivot pin. Each jaw is positioned in a respective jaw cavity and each said pivot pin is positioned in a respective pivot pin notch. At least one retaining cap secured to said housing for securing said pivot pins in said pivot pin notch and thereby allowing said jaws to pivot within said respective jaw cavities.

Abstract: The jaw assembly includes a master jaw and an insert jaw. An engagement surface on the master jaw provides a mounting surface for the insert jaw. The master jaw is contoured to provide a minimum of mass opposite the mounting surface and opposite the engagement surface to minimize the total rotating mass when the jaw assembly is in operation. In operation, a force is applied substantially perpendicular to the engagement surfaces between the insert jaw and master jaw such that the engagement surface experiences the force rather than the insert fastener.

Abstract: A chuck adapter attachable to a fixed chuck mechanism for converting the fixed chuck mechanism to a compensating chuck mechanism includes an attachment plate for connection to the head of the fixed chuck mechanism. The attachment plate includes a plurality of slots formed therein for alignment with respective drive jaws on the fixed chuck head. A plurality of adapter jaws are provided, each movable along a respective one of the plate slots, each adapter jaw including a movable clamping pin extending therefrom, and each adapter jaw including a hydraulic displacement member which reacts to movement of the clamping pin. A hydraulic circuit is provided in fluid communication with each of the hydraulic displacement members for maintaining substantially the same clamping force on each of the clamping pins as the clamping pins move.

Abstract: A chuck includes a generally cylindrical body having a nose section and a tail section. A plurality of jaws are movably disposed with respect to the body to and away from the chuck's axial bore. Each jaw includes a tool engaging surface facing, and generally parallel to the axis of, the axial bore. Each jaw includes a back surface opposite the tool engaging surface and a pair of planar side surfaces extending from the tool engaging surface toward the back surface. The side surfaces are disposed on either side of a plane that includes the axis. The side surfaces define an angle through the jaw between the side surfaces that is greater than 120°.

Abstract: The invention relates to a chuck with chuck jaws (2) which are guided in the chuck housing (1). Inner jaws (4) which can be coupled or uncoupled are assigned directly or indirectly to said chuck jaws via rack gears (3), whereby the inner jaws (4) are connected to a central pulling head (12) via a wedging mechanism. The pulling head is connected via a rod or hollow shaft (13), said rod or hollow shaft being guided in a central bore of the main spindle (25), to the piston of a hydraulic cylinder arranged on the rear part of the main spindle (25).

Abstract: A chuck comprises: a chuck body attached to a spindle of a machine tool; master jaws attached to the chuck body along the normal of the chuck body and formed with T-shaped grooves extending along the length thereof; T nuts having tops and trunks, the tops being slidably fitted in the T-shaped grooves of the master jaws; gripping claws having work holding surfaces and grooves for engagement with the trunks of the T nuts; and eccentric shafts inserted into holes formed across the T nuts and the gripping claws and used for attaching the gripping claws to the T nuts. The holes extend across the T nuts and the gripping claws which are engaged with one another. The gripping claws have large reshaping margins at work holding surfaces thereof.

Abstract: A rotary clamping device for use in clamping and holding a metal casting tree during cutting of the metal casting tree includes a cylinder having a piston rod for actuating a plurality of clamping jaws. In one embodiment, a conically shaped cam engages exteriorly disposed clamping jaws for urging the jaws in a clamping direction. In another embodiment, an exteriorly located cam urges the jaws in a clamping direction. The number of jaws employed may vary with the shape of the metal casting tree to be gripped.

Abstract: A lathe chuck has a chuck body centered on and rotatable about a main axis and formed with a plurality of radially extending jaw-guide grooves and, transverse to the grooves, with respective guide passages each in turn formed with an abutment. Respective jaws displaceable in the grooves each have at least one tooth exposed in the respective guide passage and respective control rods displaceable along the passages each have at least one tooth meshing with the tooth of the respective jaw. A control pin is axially displaceable in each rod between an extended position projecting into the respective jaw-guide groove and a retracted position. The control pins are displaced on engagement with the teeth of the respective jaws into the retracted positions. A latch pin is axially displaceable in each rod between an extended latching position engaging the respective abutment and preventing movement of the respective rod in the respective passage and a retracted position permitting such movement.

Abstract: A chuck has a chuck body adapted to be rotated about a chuck axis and a plurality of elongated jaw arms angularly spaced about the axis, pivotal in the chuck body about respective guide axes extending secantally of the chuck axis, and axially slidable in the body. Each jaw arm has a front outer end formed with a generally axially extending and radially inwardly directed outer face and an axially outwardly and forwardly directed inner face extending radially inward from an axially inner end of the outer face. Each outer face converges axially outward with the chuck axis and forms a small acute angle with the chuck axis. Respective jaw inserts each have a pair of faces complementary to and flatly engaging the respective jaw faces. These inserts are releasably secured to the jaw outer ends with the insert faces bearing on the jaw faces. The faces are planar. In addition each insert is formed with at least one throughgoing hole extending substantially parallel to the outer insert face.

Abstract: Each of master jaws (17) has a middle spherical part guided for sliding movement by a spherical guide surface (16) formed in a chuck body (2), a round back end part (19) extended slidably through a spherical bearing member (12) supported on a support member (10) attached to a middle part of a driving member (5). Each master jaw (17) is provided with a through hole (26) extending between the front and the back end thereof and a sliding member (30) is inserted in the through hole of the master jaw (17) through the front end of the same so as to come into sliding contact with a stopper (36) attached to a chuck body (2). Therefore, the state of sliding contact between the sliding member (30) and the stopper (36) can be adjusted on the side of the front part of the chuck and work for adjusting the state of sliding contact can be easily achieved.

Abstract: A jaw assembly for a jaw chuck for holding a workpiece to the spindle of a machine, such as a lathe, includes an intermediate coupling member that engages a master jaw slot formed in a master jaw which is disposed in a radial guide formed in the body of the chuck. A retaining mechanism secures the intermediate coupling member within the master jaw slot. A top jaw is configured to be connectively engaged with the intermediate coupling member by inserting the intermediate coupling member into a top jaw slot. The top jaw is held securely to the intermediate coupling member, and, accordingly, to the master jaw, when the retaining mechanism is tightened. During top jaw change-out the retaining mechanism is released, thereby permitting the top jaw to be disengaged from the intermediate coupling member while still loosely retaining the intermediate coupling member within the master jaw slot.

Abstract: A chuck is provided for use with a manual or powered driver, such as a drill. The chuck has a body member with angularly disposed passageways formed therethrough. A plurality of jaws are slidably positioned within the angularly disposed passageways. The jaws grip upon a tool shank inserted into the body member. A nut is rotatably mounted on the body member and has nut threads defined on an inner circumference thereof in engagement with the jaw threads. A sleeve member is in driving rotational engagement with the nut whereby when the sleeve is rotated with respect to the body member, the jaws are also moved within the passageways. A rotational stop is defined between the nut and jaws wherein upon the jaws reaching a predetermined position within the passageways, further rotation of the nut in an opening direction is prevented. The stop comprises a radially extending surface defining an end of the nut threads. The radially extending surface contacts a side surface of at least one of the jaws.

Abstract: A jaw assembly used with the rotary driving member of an air cylinder to process a workpiece, including a casing having a center through hole into which the rotary driving member of the air cylinder is inserted, a springy jaw holder covered on the casing, the springy jaw holder having two springy thinner areas and a rigid thicker area concentrically arranged around a center through hole thereof, a plurality of jaws and a pair of rails radially provided at an outer side, and a T-block moved in between the rails and fixed at the desired location to hold the jaws on the jaw holder, a socket mounted in between the casing and the springy jaw and coupled to the rotary driving member of the air cylinder, a plurality of counterweights mounted around the socket and connected between the casing and the jaw holder, the counterweights each having a plurality of through holes, and a plurality of axle bushes respectively mounted in the through holes at the counterweights and connected between the casing and the jaw holder

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: An object of the present invention is to provide a chuck assembly which may make better the axis vibration precision of the tool and the grip rigidity of the tool. The chuck assembly wherein a plurality of jaws (2) each of which has an axis L.sub.2 slanted relative to an axis L.sub.1 of a chuck body (1) are provided on the chuck body (1), a male screw portion (2a) provided on each jaw (2) is engaged with a female screw portion (4a) of a rotatable nut member (4) provided on the chuck body (1), and the nut member (4) is rotated to open/close and advance/retract the jaws (2) to grip a shank (5a) of a tool (5) is characterized in that a cross-sectional shape of the tool grip portion of each jaw (2) is defined so as to grip the shank (5a) of the tool (5) by either one of the two corner portions B and H located in a right and left symmetrical condition relative to an axis L.sub.3 of the tool (5) and/or two non-corner portions C and G located in a right and left symmetrical condition relative to the axis L.sub.

Abstract: The present invention discloses a set of multiple universal adjustable soft jaws 26 for holding workpieces for being mounted onto a lathe chuck body 14 for mounting onto the spindle 15 of a lathe 10. The multiple jaws 26 are mounted onto the face of the chuck body 14 in the standard manner. The jaws 26 are further equipped on their inner end with an offset flange foot 28 for having mounted thereon custom sized jaw pads 30 which are attached to the offset flange foot 28 with quick connect/disconnect screws 32 which allow the custom sized jaw pads 30 to be quickly and easily removed from the universal set of jaws 26. These custom sized jaws 30 are useful for accommodating workpieces of particular sizes and shapes depending on the specific job application.

Abstract: A lathe chuck jaw assembly utilizes top jaws which have replaceable inserts mounted to their clamping faces. The inserts are used to provide a contact surface to hold a workpiece during machining. The contact surfaces of the inserts may be machined for matching a particular workpiece shape such as round stock, hex stock, square stock, or custom configurations. A boring ring is installed between the top jaws and rotated so that the inserts may be symmetrically machined. Alternatively, a polygonal insert blank having congruent sections which are joined with keys along their outer sides may be loaded in the lathe chuck and machined for a particular workpiece. A pad adapter base for supporting a hardened collet pad is also disclosed.

Abstract: Pinching of the fingers of an air chuck is prevented during opening or closing in order to allow them to open or close smoothly and to miniaturize the air chuck. In a linear guide air chuck having a rod that is operated by an air cylinder mechanism; a pair of fingers is provided that can be opened and closed to grip a workpiece; a guide mechanism moves the fingers linearly to open or close them; and a pair of levers convert operation of the rod into the opening and closing operation of both fingers the lever and finger being coupled together by fitting a spherical engagement element formed on the lever so, in a circular engagement hole cut in the top surface of the finger, at a position at which the acting force of the lever can be transmitted to the finger at nearly the same height as that of the guide mechanism.

Abstract: The master jaws in a three jaw chuck are located and maintained in position by a spacer having two plates which are located adjacent one another along edges which are inclined approximately 7.degree. from the vertical. One plate is generally rectangular. The other plate is generally trapezoidal. Sliding the plates along the inclined edges positions one edge of the rectangular plate against one of the master jaws and the two edges of the generally trapezoidal plate against the other two master jaws. The relative movement of the plates changes the position of the outer edges of the plates which allows for the master jaws to make contact with the plates at different positions to allow for positioning of the soft jaws for machining.

Abstract: A non-surface marring work piece lathe mate pad which is interposed and held between the work piece and a lathe's chuck jaws. Each lathe mate has two grooved surfaces extending around three of its sides and flattened front and back surfaces which engage the work piece and lathe's chuck jaw. Disposed within these grooves are two continuous expandable strap members which extend around the lathe mates and the chuck jaws to retain them in place. These end grooves in each lathe mate prevent slipping of the expansion members with respect to rotatable work piece holding chuck jaws.

Abstract: A tube squaring tool includes a housing having forward and rearward end areas and a tubular workpiece clamping device located at the forward end area for securing and retaining a tubular workpiece relative to the housing so that the end of the workpiece can be machined by a rotary cutting head carried by the housing and movable towards and away from the end of the workpiece by manipulation of a feed mechanism. The tubular workpiece clamping device includes a pair of saddle members carried within a saddle mounting ring with one of the saddle members being frictionally secured within the mounting ring using a detent mechanism and the other saddle member being movable relative to the mounting ring and the opposing saddle member by a threaded connector that enables clamping of a tubular workpiece between the saddle members when the moveable saddle member is moved in a clamping direction towards the opposed fixed saddle member.

Abstract: A chuck device for use with a manual or powered driver has a body member with a plurality of angularly disposed passageways formed therethrough. A jaw is slidably positioned in each passageway. Each jaw has a tool engaging face formed on one side and threads formed on the opposite side. The jaws are threadedly engaged with a rotatable nut mounted on the body member. A sleeve member is in rotational engagement with a nut whereby rotation of the sleeve causes the nut to rotate and the jaws to advance or retract within their respective passageways. Each jaw and its respective passageway has a unique matching profile different from the other jaws and respective passageways so that the jaws cannot be interchanged with different passageways in the chuck.

Abstract: A chuck for use with a manual or powered driver having a drive shaft is provided. A generally cylindrical body has a forward section and a rearward section, the rearward section adapted to mate with the drive shaft of the driver. A gripping mechanism is actuatable to a closed position in which the gripping mechanism axially and rotationally retains a tool with respect to the body and to an open position in which the gripping mechanism does not so retain a tool. An annular nut is disposed about the body and has a threaded portion in threaded engagement with the gripping mechanism so that rotation of the nut about the body in a closing direction actuates the gripping mechanism to the closed position and rotation of the nut in an opening direction, opposite the closing direction, actuates the gripping mechanism to an open position.

Abstract: A force actuated clamping chuck has a chuck body with a central bore and at least two clamping jaws that are guided in radial jaw guides of the chuck body. The radial jaw guides have opposed sidewalls with a plurality of guide grooves which are engaged by a plurality of guide ribs provided at lateral surfaces of the clamping jaws. A clamping piston is axially guided in the central bore and has a throughbore for receiving a workpiece. The clamping piston has key grooves provided at the periphery thereof. The clamping jaws have a key member at an end thereof facing the clamping piston. The key members engage the key grooves. At least two of the guide ribs extending over the entire radial length of the clamping jaw have a trapezoidal cross-section. At least one of the guide ribs, extending over a portion of the radial length at an end of the clamping jaw remote from the clamping piston, has a trapezoidal cross-section.

Abstract: A chuck for use with a manual or powered driver including a nut rotatably mounted on the chuck body and in engagement with the threads of the chuck jaws. Aspects of the chuck jaws, such as the jaw face, are manipulatively formed by selective redistribution of metal. Formation of the chuck jaws in this manner is distinguishable from jaws formed by prior art machining techniques due to the structural orientation of grain in the metal. Forming of the chuck jaws preferably occurs at low applied temperature, i.e. not exceeding 1000 degrees Fahrenheit.

Abstract: A force-actuated chuck includes a chuck body having radial jaw guides and clamping jaws guided in the radial jaw guides. At least one force-activated movable drive member is arranged in the chuck body for driving the clamping jaws. Each one of the radial jaw guides has a centrally arranged cutout for receiving a lubricant.

Abstract: A chuck for use with a manual or powered driver having a rotatable drive shaft is provided. A plurality of jaws are slidably positioned in a body member. Each jaw has a jaw face formed on one side and threads formed on the opposite side. Each jaw face includes a first ridge substantially parallel to the chuck axis. The first ridge is offset from, and substantially parallel to, a plane including the jaw axis and the chuck axis. A second ridge is substantially parallel to the first ridge but offset from the plane opposite the first ridge. A third ridge is disposed between the first and second ridges and has a peak on the opposite side from the chuck axis of a plane including the peaks of the first and second ridges.

Abstract: A chuck has a plurality of top jaws for engaging a workpiece. Each top jaw has a recess and a slot that extend completely through the top jaw. The recess and slot allow the forward end of the top jaw to deflect in a rearward direction. This motion allows the jaws to maintain even pressure on the workpiece instead of cocking, thereby minimizing deflection of the workpiece during machining. The slot defines a rearward facing shoulder on the forward end. The maximum deflection of the forward end is limited by the width of the slot. The distance of deflection may be limited by pins located within holes extending through the jaw perpendicular to the slot.

Abstract: A top jaw assembly for mounting upon the master jaw of a chuck for a lathe includes a mounting base and a top jaw. The mounting base contains two bores which facilitate securement to the master jaw, and a threaded hole. The top jaw is secured to the mounting base by way of a bolt that engages the threaded hole in the mounting base. Movement of the top jaw is prevented by slidably interengaged axial and transverse structure.

Abstract: A chuck having jaws that are displaceable in radial guideways and can be operated by wedge bars. The wedge bars can be displaced beyond a working space to such an extent that the teeth thereof disengage from the teeth of the pertaining jaw. Each of the wedge bars has disposed therein a pin that projects into the guideways and that has an inclined surface that cooperates with the pertaining jaw; the pin can be displaced against the force of a spring. During exchange of the jaws, the wedge bars can be locked in an end position by the pins.

Abstract: An improved tool holding device has at least one tool engaging member for selectively engaging a tool during operation, such as the jaw blades of a chuck device and gripping jaw blades of a collet device. The tool holding device includes an actuating mechanism for causing the tool engaging members to selectively engage upon a tool. The actuating mechanism includes at least two components in frictional engagement. At least a portion of the frictional engaging components is coated with a solid film lubricant.

Abstract: A squaring machine has an elongate housing with a rotatable spindle extending from one end thereof and attached to which is a tool for squaring the end of work piece. At the opposite end of the housing are first and second feed members, the first feed member in the form of a screw which is locked against axial movement within the housing, and the second feed member in the form a nut which is locked against rotation with respect to the housing. The feed nut is rotatably connected to an end of the spindle such that rotation of the feed screw will cause axial movement of the spindle. Also, the machine includes a first and second removable retainers, each of which has a pair of opposing jaws for clamping around a cylindrical work piece, however, the jaws of the first retainer are for grasping a work piece of a different size than the jaws of the second retainer.

Abstract: A chuck, each of the clamping jaws of which is adapted to be driven by a wedge bar that can be displaced in the chuck body beyond the clamping stroke to such an extent that the clamping jaws can be removed radially. A locking mechanism in the form of a rotatably held adjusting pin is provided for each clamping jaw. Each wedge bar, on that side that faces the adjusting pin, is provided with a slot-like recess for receiving the adjusting pin in an operating range of the chuck. The slot-like recess extends in the longitudinal direction of the wedge bar. In the operating position of the chuck, the adjusting pin is adapted to be inserted into the slot-like recess in an automatic manner.

Abstract: A jaw assembly (17) in combination with a master chuck jaw (18) of a chuck (16), the assembly (17) having a base (29) that includes a sleeve insert (48) that is splined (49) to mate with a spline (50) in a bore (44) in the base (29); with an annular chamfer (46) on the bottom of the base (29) to which a flared-out portion (52) of the insert (48) keys. A slug (26) adapted to hold a workpiece (30) includes splines (36) that mount to the splines (49) of the splined insert (48) that extends upwardly of the base (29). Above the splines (36) in the slug's bore (32), an unsplined portion of the bore (32) provides for a shoulder (38) that seats a threaded bolt (40) that threads to internal threads (54) provided in the insert (48), for securing the slug (26) to its base (29).