Abstract: Various chucks for use with a power driver having a rotatable drive spindle are provided. One chuck includes a plurality of jaws disposed at a forward end of the chuck, a body, a push plate, a jaw spring, and a nut. The plurality of jaws may be disposed in the body and configured to rotate with the body about a center axis of the chuck. The push plate may be operably coupled to each of the jaws. The jaws may be configured to translate forward to close the jaw opening in response to the push plate translating axially forward. The jaw spring may be configured to apply a forward directed force to urge the push plate forward. The nut may have nut teeth that cause the jaws to translate forward and clamp onto the working bit in response to the nut being rotated in a tightening direction.

Abstract: A chuck configured to be operably coupled to a power driver having a rotatable drive spindle is provided. The chuck (100) may include a body (130) having a center axis (50) and a plurality of clamping jaws (101) configured to clamp onto a working bit. The clamping jaws (101) may be configured to angularly translate relative to the center axis towards or away from a clamping jaw point of convergence (154) to close or open a working bit opening defined by the clamping jaws (101). The clamping jaw point of convergence (154) may be on the center axis. The chuck (100) may also include a plurality of bit alignment jaws (150). The bit alignment jaws (150) may be configured to maintain the working bit within the working bit opening by being configured translate towards or away from a bit alignment jaw point of convergence (153) that is on the center axis (50) and disposed rearward of the clamping jaw point of convergence (154).

Abstract: A chuck for a power tool includes a chuck body extending along a longitudinal axis. The chuck also includes a plurality of jaws, each with a jaw end, and each movable along a respective jaw axis between a closed position and an open position. Each respective jaw axis is oriented at an oblique angle relative to the longitudinal axis. A biasing member is coupled to the jaws and is operable to bias the jaws toward the closed position. The biasing member includes a spring. The chuck also includes a rotating assembly selectively engageable with the jaws such that, when engaged, the jaws are movable in response to rotation of the rotating assembly. The biasing member includes a guide sleeve coupled to each of the jaws and movable axially along the longitudinal axis in response to each of the jaws moving along its respective jaw axis.

Abstract: A drill chuck having a chuck body, on which a threaded ring is guided, which is in engagement with rows of teeth assigned to clamping jaws for the purpose of adjusting the clamping jaws having a thread and guided in the chuck body, as well as comprising a clamping sleeve which surrounds the chuck body and may be coupled with the threaded ring in a torque-transmitting manner and which may be coupled with the chuck body by a locking device. The locking device is formed by a locking sleeve, which has a lock toothing and is rotatably fixedly connected to the threaded ring and which is axially movable between a drilling configuration and a clamping configuration relative to the threaded ring and the clamping sleeve; the locking device is also formed by a mating toothing assigned to the chuck body.

Abstract: A chuck including a body having a nose section, a tail section and a center axis, the nose section defining an axial bore and a plurality of passageways. A plurality of jaws is disposed in the passageways, a nut is rotatably mounted about the body so that rotation of the nut either moves the jaws toward or away from the center axis, and a sleeve that is rotatably mounted about the body, the sleeve being rotatable with respect to the nut between a first rotational position and a second rotational position. An annular array of locking teeth is non-rotatable with respect to one of the body and the nut. A lock ring includes at least three projections and is axially movable so that, when engaged, the projections and the locking teeth resist the lock ring from rotating in the opening direction with respect to the body.

Abstract: A power drill has a housing holding a motor and a drive member rotatable about an axis. An arbor extending along the axis outside the housing is rotationally coupled by complementary formations with the drive member. A tube shaft on which is fixed a chuck body holding a plurality of axially displaceable jaws. A sleeve in the tube shaft is rotationally coupled to the arbor. A pusher element braced axially forward against the jaws extends axially rearward into the sleeve, and interengaging screwthreads on the sleeve and pusher element axially displace the pusher element and the jaws on relative rotation of the sleeve and pusher element. A setting sleeve rotationally coupled to the rear end of the tube shaft is axially displaceable between a tightening position engaging a slip coupling on the housing and a drilling position disengaged from the slip coupling and rotationally coupled to the arbor.

Abstract: A chuck for use with a driver having a rotatable drive shaft, the chuck including a body having a nose section and a tail section, the tail section being configured to rotate with the drive shaft and the nose section having an axial bore. A plurality of jaws is movably disposed with respect to the body and in communication with the axial bore. A first sleeve is rotatably mounted to the body in operative communication with the jaws so that rotation of the sleeve moves the jaws either toward a longitudinal center axis of the axial bore or away from the longitudinal center axis. A second sleeve is rotatably mounted to the body and is movable between a first position in which the second sleeve is rotatably fixed to the body and a second position in which the second sleeve is rotatable about the body. The second sleeve moves in a direction transverse to the longitudinal center axis of the axial bore when moving between the first position and the second position.

Abstract: A drill chuck has a chuck body having a plurality of angularly spaced and axially extending but angled guide grooves each holding a jaw that is axially displaceable between an axially front closed position and an axially rear open position. Each jaw has an outer edge formed with external teeth, and also has an axially rearwardly directed rear face extending at an acute angle to a plane perpendicular to the axis. A ring rotatable on the body about the axis has an internal screwthread meshing with the teeth, and an adjustment sleeve rotationally coupled to the ring is rotatable to move the jaws between the open and closed positions. A cover disk on the rear end of the body is formed with respective throughgoing chip-discharge holes each having an inner end aligned with a respective one of the grooves and an outwardly open outer end.

Abstract: A drill chuck has a chuck body centered on an axis, made of plastic, and formed with an axially rearwardly open drive-spindle seat, at least one axially extending slot of ring-segment section opening radially inward into the seat, an axially forwardly open tool-holding cavity, and a plurality of angled jaw guides. Respective jaws are movable in the guides and engaged by a threaded ring axially fixed on the body and rotatable about the axis thereon. A tightening sleeve rotatable about the axis on the body is connected to the ring for rotating same.

Abstract: A chuck including a body having a tail section and a nose section defining an axial bore. A plurality of jaws are movably disposed with respect to the axial bore and a nut is in threaded engagement with the jaws. A sleeve engages the nut so that rotation of the sleeve moves the jaws. A first ring defines a plurality of teeth and a second ring is rotatable relative to the nut over a limited arc and defines at least one pawl. In a first state, the second ring is non-rotatable relative to the first ring in both the opening and closing directions, and in a second state the first and second rings are rotatable about the body, and the second ring is rotatable relative to the first ring in the closing direction.

Abstract: A chuck including a body having a nose section, a tail section and a center axis, the nose section defining an axial bore and a plurality of passageways. A plurality of jaws is disposed in the passageways, a nut is rotatably mounted about the body so that rotation of the nut either moves the jaws toward or away from the center axis, and a sleeve that is rotatably mounted about the body, the sleeve being rotatable with respect to the nut between a first rotational position and a second rotational position. An annular array of locking teeth is non-rotatable with respect to one of the body and the nut. A lock ring includes a projection and is axially movable so that, when engaged, the projection and the locking teeth prevent the lock ring from rotating in the opening direction with respect to the body.

Abstract: A chuck including a body having a nose section, a tail section and a center axis, the nose section defining an axial bore and a plurality of passageways. A plurality of jaws is disposed in the passageways, a nut is rotatably mounted about the body so that rotation of the nut either moves the jaws toward or away from the center axis, and a sleeve that is rotatably mounted about the body, the sleeve being rotatable with respect to the nut between a first rotational position and a second rotational position. An annular array of locking teeth is non-rotatable with respect to one of the body and the nut. A lock ring includes at least three projections and is axially movable so that, when engaged, the projections and the locking teeth resist the lock ring from rotating in the opening direction with respect to the body.

Abstract: A mechanical assembly for a power tool, and a power tool incorporating the mechanical assembly are provided. The mechanical assembly includes (i) a first member having a first axis and a first engagement portion inclined relative to the first axis, (ii) a second member having a second axis and a second engagement portion inclined relative to the second axis, wherein the first and second engagement portions engage each other by movement of the first and second members relative to each other in the direction of at least one of the axes; and wherein the first member is a ring gear and the second member is a central gear and the first and second engagement portions engage and disengage each other by movement of the second member within a space defined within the first member.

Abstract: A tool chuck includes a body supporting a plurality of jaws, and a sleeve that is operatively connected to the jaw. The sleeve may be rotated to open and close the jaws. The sleeve includes a radial inward facing surface with recesses that are covered by a metal insert. The metal insert provides a metal-to-metal interface for a lock feature.

Abstract: A chuck for use with a driver, the chuck including a body having a nose section defining an axial bore and a tail section. A plurality of jaws is in communication with the axial bore. A first sleeve is rotatably mounted to the body so that rotation of the sleeve moves the jaws either toward or away from a longitudinal center axis of the axial bore. A second sleeve is rotatably mounted to the body and is movable between a first position in which the second sleeve is rotatably fixed to the body and a second position in which the second sleeve is rotatable about the body. The second sleeve moves in a direction transverse to the longitudinal center axis of the axial bore when moving between the first position and the second position.

Abstract: To provide a practical chuck device which is not only capable of providing more reliable and stable retention between the rotary body or the main body and the rotary sleeve, but also has excellent mass-productivity.

Abstract: The present invention provides a locking mechanism which does not unlock a locked fixing state inadvertently and can lock the fixing state reliably, and a clamping head device and a fastening clamp with the locking mechanism. In a rotation control body 30 for locking the fastening fixing state, a locking gear 34 whose rotation is fixed, and a nut gear 32 which is fixed in the axial direction and the rotation direction fixed are respectively provided with circumferential surface gears 325, 348 and ratchets 326, 346, wherein the circumferential surface gears 325 and 348 are meshed in axial direction, and the ratchets 326 and 346 are meshed in radial direction.

Abstract: The invention relates to a tool-holder mandrel for fitting to a rotating machine, comprising: a body comprising a rear portion designed to be attached to a drive shaft of the rotating machine and a front portion in which housing are arranged converging toward the front; jaws mounted so as to slide each in a housing of the body and having an inner thread; a ring for moving the jaws, mounted so as to pivot relative to the body, having a peripheral thread interacting with the inner thread of the jaws so that the rotation of the ring closes or opens the jaws.

Abstract: A chuck for use with a driver having a rotatable drive shaft, the chuck including a body having a nose section and a tail section, the tail section being configured to rotate with the drive shaft and the nose section having an axial bore. A plurality of jaws is movably disposed with respect to the body and in communication with the axial bore. A first sleeve is rotatably mounted to the body in operative communication with the jaws so that rotation of the sleeve moves the jaws either toward a longitudinal center axis of the axial bore or away from the longitudinal center axis. A second sleeve is rotatably mounted to the body and is movable between a first position in which the second sleeve is rotatably fixed to the body and a second position in which the second sleeve is rotatable about the body. The second sleeve moves in a direction transverse to the longitudinal center axis of the axial bore when moving between the first position and the second position.

Abstract: This invention provides a self-locking keyless drill chuck comprising a drill body, three clamping jaws, a nut, a front sleeve and a rear sleeve. A thread connection is adopted between the clamping jaws and the nut, wherein the rear sleeve is rotatably installed outside the drill body, the inner side of the front sleeve is provided with a ring gear at the rear part of the nut, a ring which cannot rotate relative to the drill body is arranged outside the drill body, the ring is provided with a member which is with the gear and takes part in self-locking, the rear sleeve is provided with or connected with an inner sleeve rotated with the rear sleeve, the inner sleeve is provided with a structure acting on the member taking part in self-locking. This invention has the advantages of more conveniently assembling and achieving self-locking of the drill chuck through operating the rear sleeve. The drill bit clamped by the clamping jaw cannot be easily loosened and slipped even under the impact of an impulsive load.

Abstract: A drill chuck with an impacting structure that may be selectively employed to drive the jaws of the chuck into further engagement with or out of engagement with a bit. The chuck is configured so as to be capable of generating relatively high torques in a loosening direction so as to ensure that the bit can be removed from the jaws of the chuck.

Abstract: A machine tool bit holder providing a stable connection between a machine and a tool bit being used to perform machining operations on a work piece. The holder for the tool bit is of simple construction and has a large contact area relative to a tool bit size and a holder size between the holder and the tool bit, and the holder is configured so that the tool bit can be easily mounted into and dismounted from the holder. The holder allows different shapes or configurations of tool bits, such as an angle between the holder and the tool bit, and tool bits that are substantially rectangular as well as substantially round in cross-section.

Abstract: A tool chucking apparatus includes a fastening member, a clipping member, a holding member and an extension member. The fastening member has a first housing space to hold the clipping member. The clipping member has pawl structures spaced in an annular manner and formed in a conical structure. The conical structure has a top end directing towards the fastening member. The extension member includes a support portion and an anchor portion coupled together. The support portion has another end tightly coupled with the clipping member and the fastening member. The anchor portion has another end tightly coupled with the holding member. The support portion is selectable at a desired length specification according to the cutter or tool. The fastening member, clipping member, holding member and extension member are hollow in the center thereof to form an installation passage after assembly to hold the cutter or tool.

Abstract: A drill chuck has a chuck body centered on and rotatable about an axis and formed with angled guides and respective jaws slidable in the guides axially forward and radially toward each other and axially rearward and radially away from each other. An annular tightening element is limitedly axially shiftable on the sleeve between a front position and a rear position. Screwthreads engaged between the element and the jaws axially displace the jaws forward on rotation of the element in a tightening direction and axially displace the jaws rearward on rotation of the element in an opposite loosening direction. Respective annular arrays of teeth angularly fixed on the element and the body are interengaged and prevent relative rotation of the element and body in the rear position of the element and are spaced and permit relative rotation of the element and body in the front position of the element.

Abstract: The present invention relates to a self-tightened reverse locking chuck, comprising: a body member, a nut, jaws, a bearing, a drive sleeve, a front sleeve, an annular drive member, a movable ratchet wheel, a reverse locking ratchet wheel, a detent lock ring, a control ring and a control ring outer sleeve. The drive sleeve is positioned in a central hole in the rear end of the body member via a spring ring, drive keys on the drive sleeve can drive the annular drive member and the detent lock ring to rotate, in the chucked state, locked by the control ring. The chuck according to the present invention has the function of self-tightening, preventing the clamping force from being excessive, and of performing reverse rotation operation. The chuck is easy to assembly and disassembly, a tool shank clamped by the chuck will not be loosened due to vibration or shock, and the chuck is adapted for use in tools with various type of shank.

Abstract: A drill chuck having an adjustable depth stop to control an amount by which a tool bit, such as a drill or a screwdriver bit, is inserted into the drill chuck. The adjustable depth stop can include a spring, such as a conical spring, that can be coupled to a spindle of the chuck.

Abstract: A chuck includes a driver disposed on a chuck body and in engagement with the jaws so that at least one of rotation and axial movement of the driver with respect to the body opens or closes the jaws. A first detent is disposed in the body in communication with the jaws. At least one of the jaws defines a catch at a predetermined position so that the catch engages the first detent when the jaws are at a predetermined position on the body with respect to a chuck bore.

Abstract: A chuck includes a generally cylindrical body and a plurality of jaws reciprocally disposed in the body in communication with a central bore in the body. A first detent extends radially into the central bore and is releasable in a radially outward direction. Upon insertion of an elongated tool shaft having a polygonal cross section into the bore so that a groove in the tool shaft is aligned with the first detent, the first detent engages the groove and axially retains the tool shaft. Upon movement of the jaws so that the jaw faces engage flat sides of the tool shaft, the jaws rotationally retain the tool shaft.

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: 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. A generally cylindrical sleeve is in driving communication with the jaws. The sleeve engages the body or the jaws by a first set of interengaged threads so that relative rotation between the first threads drives the jaws toward or away from the chuck axis. The sleeve engages the body or the jaws by a second set of interengaged threads so that relative rotation between the second threads drives the jaws toward or away from the chuck axis. The first thread set defines a first pitch so that when the jaws close, the first threads rotationally lock in the closing direction. The second thread set defines a second pitch that is higher than the first pitch so that when the jaws close, the second threads are relatively rotatable in the closing direction.

Abstract: A chuck for a power tool having a plurality of chuck jaws of the type that open to receive a work tool and close to grip the work tool, wherein the chuck comprises a front sleeve, a rear sleeve, and an integral chuck jaw unit fitted within the front and rear sleeves in a removable manner. The chuck jaw unit includes a plurality of chuck jaws, a support body having individual jaw bores for receiving the chuck jaws, a traveler affixed to the remote ends of the chuck jaws; and an operator for reciprocating the traveler along a chuck axis to open and close the chuck jaws. The traveler includes internal traveler threads and the operator includes a threaded barrel in the form of a jack screw on which the traveler threads up and down. The operator of the chuck unit and the rear sleeve may be press fitted together so that manual rotation of the rear sleeve causes the operator to rotate whereby the traveler reciprocates.

Abstract: A chuck for a power tool having a plurality of chuck jaws of the type that open to receive a work tool and close to grip the work tool, wherein the chuck comprises a front sleeve, a rear sleeve, and an integral chuck jaw unit fitted within the front and rear sleeves in a removable manner. The chuck jaw unit includes a plurality of chuck jaws, a support body having individual jaw bores for receiving the chuck jaws, a traveler affixed to the remote ends of the chuck jaws; and an operator for reciprocating the traveler along a chuck axis to open and close the chuck jaws. The traveler includes internal traveler threads and the operator includes a threaded barrel in the form of a jack screw on which the traveler threads up and down. The operator of the chuck unit and the rear sleeve may be press fitted together so that manual rotation of the rear sleeve causes the operator to rotate whereby the traveler reciprocates.

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. A generally cylindrical sleeve is in driving communication with the jaws. The sleeve engages the body or the jaws by a first set of interengaged threads so that relative rotation between the first threads drives the jaws toward or away from the chuck axis. The sleeve engages the body or the jaws by a second set of interengaged threads so that relative rotation between the second threads drives the jaws toward or away from the chuck axis. The first thread set defines a first pitch so that when the jaws close, the first threads rotationally lock in the closing direction. The second thread set defines a second pitch that is higher than the first pitch so that when the jaws close, the second threads are relatively rotatable in the closing direction.

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. A generally cylindrical sleeve is in driving communication with the jaws. The sleeve engages the body or the jaws by a first set of interengaged threads so that relative rotation between the first threads drives the jaws toward or away from the chuck axis. The sleeve engages the body or the jaws by a second set of interengaged threads so that relative rotation between the second threads drives the jaws toward or away from the chuck axis. The first thread set defines a first pitch so that when the jaws close, the first threads rotationally lock in the closing direction. The second thread set defines a second pitch that is higher than the first pitch so that when the jaws close, the second threads are relatively rotatable in the closing direction.

Abstract: A chuck includes a driver disposed on a chuck body and in engagement with the jaws so that at least one of rotation and axial movement of the driver with respect to the body opens or closes the jaws. A first detent is disposed in the body in communication with the jaws. At least one of the jaws defines a catch at a predetermined position so that the catch engages the first detent when the jaws are at a predetermined position on the body with respect to a chuck bore.

Abstract: A chuck includes a generally cylindrical body having a nose section and a tail section. The tail section is adapted to rotate with the drive shaft, and the nose section has an axial bore formed therein. A driver is axially movably disposed about the body. A generally cylindrical sleeve is rotatably mounted about the body. A grip is mounted in the body in communication with the axial bore and in operative communication with the driver. The driver is in communication with the sleeve and the body so that, in a first state of the chuck, rotation of the sleeve with respect to the body in a closing direction moves the grip toward the axis of the axial bore and so that, in a second state of the chuck, the driver is axially reciprocal with respect to the sleeve and the body.

Abstract: A chuck 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 said body toward and away from an axis of the axial bore. A generally cylindrical sleeve is mounted about the body forward of the body tail section and extends rearwardly toward and surrounds the body tail section. A disc is mounted about the body tail section and defines a plurality of radially outward extending flexible tips that engage the sleeve.

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. A generally cylindrical sleeve is in driving communication with the jaws. The sleeve engages the body or the jaws by a first set of interengaged threads so that relative rotation between the first threads drives the jaws toward or away from the chuck axis. The sleeve engages the body or the jaws by a second set of interengaged threads so that relative rotation between the second threads drives the jaws toward or away from the chuck axis. The first thread set defines a first pitch so that when the jaws close, the first threads rotationally lock in the closing direction. The second thread set defines a second pitch that is higher than the first pitch so that when the jaws close, the second threads are relatively rotatable in the closing direction.

Abstract: A chuck for use with a power driver includes a generally cylindrical body, a plurality of jaws and a driving disk axially moveably disposed about the body in driving engagement with the jaws so that axial movement of the driving disk with respect to the body moves the jaws toward or away from the chuck body axis. The driving disk defines a threaded outer circumferential surface that engages a threaded inner circumferential surface of a generally cylindrical sleeve so that relative rotation between the sleeve and driving disk axially moves the driving disk with respect to the body. The driving disk defines a plurality of cylindrical slots extending at least partially radially therethrough. Each jaw includes a portion thereof that is shaped cooperatively with respect to the cylindrical slot and that is received thereby so that the jaw is axially fixed, and radially slidable with respect to the driving disk.

Abstract: A chuck includes a driver disposed on a chuck body and in engagement with the jaws so that at least one of rotation and axial movement of the driver with respect to the body opens or closes the jaws. A first detent is disposed in the body in communication with the jaws. At least one of the jaws defines a catch at a predetermined position so that the catch engages the first detent when the jaws are at a predetermined position on the body with respect to a chuck bore.

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. A generally cylindrical sleeve is in driving communication with the jaws. The sleeve engages the body or the jaws by a first set of interengaged threads so that relative rotation between the first threads drives the jaws toward or away from the chuck axis. The sleeve engages the body or the jaws by a second set of interengaged threads so that relative rotation between the second threads drives the jaws toward or away from the chuck axis. The first thread set defines a first pitch so that when the jaws close, the first threads rotationally lock in the closing direction. The second thread set defines a second pitch that is higher than the first pitch so that when the jaws close, the second threads are relatively rotatable in the closing direction.

Abstract: A chuck includes a generally cylindrical body having a nose section and a tail section. The tail section is adapted to rotate with the drive shaft, and the nose section has an axial bore formed therein. A driver is axially movably disposed about the body. A generally cylindrical sleeve is rotatably mounted about the body. A grip is mounted in the body in communication with the axial bore and in operative communication with the driver. The driver is in communication with the sleeve and the body so that, in a first state of the chuck, rotation of the sleeve with respect to the body in a closing direction moves the grip toward the axis of the axial bore and so that, in a second state of the chuck, the driver is axially reciprocal with respect to the sleeve and the body.

Abstract: A chuck includes a generally cylindrical body, a plurality of jaws and a driving disk. A bearing includes a first race, a second race and a plurality of bearing elements disposed between the first race and the second race. The first race defines a plurality of recesses therein. One of the second race and the bearing elements is disposed in communication with the first race so that, when the jaws close onto a tool and the first race and the second race rotate relative to each other, the one of the second race and the bearing elements engages successive recesses.

Abstract: A chuck includes a generally elongated body having a tail section configured to rotate with the drive shaft and a nose section having an axial bore formed therein. A plurality of jaws are movably disposed with respect to the body to and away from the axial bore. A collar in axially driving engagement with the jaws is axially movably disposed with respect to the body so that movement in a first axial direction drives the jaws toward the axis and movement in the opposite direction moves the jaws away from the axis. The collar is configured to receive at least one of the body and a shaft and defines a first surface that faces a second surface defined by the body or the shaft when the same is received by the collar. The first surface is tapered in the axial direction from a first end to a second end of the fist surface so that a first radial distance between the second surface and the first end is less than a second radial distance between the second surface and the second end.

Abstract: A chuck includes a generally cylindrical body and a plurality of jaws reciprocally disposed in the body in communication with a central bore in the body. A first detent extends radially into the central bore and is releasable in a radially outward direction. Upon insertion of an elongated tool shaft having a polygonal cross section into the bore so that a groove in the tool shaft is aligned with the first detent, the first detent engages the groove and axially retains the tool shaft. Upon movement of the jaws so that the jaw faces engage flat sides of the tool shaft, the jaws rotationally retain the tool shaft.

Abstract: A chuck unit installed in a power hand tool and controlled to hold down/release a bit, including a barrel, three clamping rods, a front cover shell, a rotary control device, a stop member, a rear cover shell, and a dust ring, wherein the rotary control device has a nut with embossed peripheral blocks for positive positioning in respective recessed locating holes in the front cover shell; the rotary control device is coupled to a stop flange outside the barrel and revolvably supported on the barrel by steel balls; the stop member is formed of two symmetrical halves and mounted on the front end of the barrel to stop the rotary control device from forward movement.

Abstract: The machine-tool drill chuck is comprised of a main cylindrical hollow body (2) linked by its rear end (13) to the machine tool and provided at its front end (15) with a front conical socket (7), inside which is located another socket (9) carriying clamping jaws (8) for holding the drill and which are subject to the action of a pushing screw (6) which is coaxial with the main body. Windows (12) are arranged as through openings in the main body. In each of the windows there is arranged a satellite gear (4) whose axis is parallel to the axis of the main body (2) and whose diameter is substantially larger than the thickness of the main body wall. The satellite gears are in mesh with the external toothing of a central gear (3) and with the internal toothing of an external ring (5) which may be actuated manually or with a key. Said central gear is also internally in mesh with the pushing screw.

Abstract: A drill has a drive unit having a front end and an output shaft projecting from the front end and centered on and rotatable about an axis, and a fan associated with the shaft for creating a moving stream of air traversing a location at the drive-unit front end. A chuck body fixed on the shaft is formed with a rear end juxtaposed with the drive-unit front end, an axially forwardly open tool recess on the axis, a plurality of angularly spaced and angled guides opening into the recess, and at least one passage extending between the chuck rear end and the recess. Respective jaws displaceable in the guides have front ends in the recess. An adjustment sleeve is rotatable about the axis on the body and interengaging formations on the sleeve and on the jaws displace the jaws radially on rotation of the sleeve about the axis.

Abstract: The chuck is used with a drill drive unit having a spindle extending along and rotatable about an axis. The chuck has a chuck body fixed on the spindle and formed with an axially forwardly open tool recess on the axis, a plurality of angularly spaced and angled guide holes opening into the recess and having inner surfaces, and a respective grit-clearing passage opening at a respective front end into each of the guide holes axially rear-ward of the recess. Respective jaws displaceable in the guide holes have outer surfaces riding on the inner surfaces of the respective guide holes and have front ends in the recess. An adjustment sleeve is rotatable about the axis on the body and interengaging formations on the sleeve and on the jaws displace the jaws radially on rotation of the sleeve about the axis.

Abstract: A chuck for tools comprises a main body in which an axial center hole and a plurality of slanting holes extending radially from the center hole are formed, a plurality of jaws each being slidably inserted in each slanting hole and formed, at its outer surface, with a male screw, a rotary member having a female screw in meshing engagement with the male screws and mounted in the main body so as to be permitted for only rotation, a first grip integrally connected to the main body, and a second grip securely connected to the rotary member to cooperate therewith.