Abstract: A chuck for holding a small bit and used with a table drill is provided for drilling a millipore. The chuck includes a holding jaw having four holders; a jaw-positioning guiding body with a square hole at the front portion for positioning the holding jaw; a crossing linkage for connecting the body to the jaw and having a crossing head and a projection portion between which a groove is formed; a guiding jacket matched with the crossing linkage and the body; a positioning screw nut matched with the jaw-position guiding body; a screw collar matched with the crossing linkage; and a bevel gear housing housed around the screw collar for adjusting the position of the holding jaw.

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. The body defines an air passageway extending through the body between the axial bore and an area about the tail section. A generally cylindrically sleeve is disposed about the body and substantially encloses the area. It is configured to extend to a housing of the drill so that air from the fan is forced into the area, through the air passageway and into the axial bore.

Abstract: A chuck 30,232 includes a pair of jaws 178,304,306 which are located within an axial opening 114,246 of a body 106,234 for receipt of a shank of a bit therein. A roller 186,238 is located in a slot 134,272 of the body 106,234 and can be pressed into the shank of the bit to clamp the shank between the jaws 178,304,306 and the roller. A sleeve 196,240 is biased and structured to normally urge the roller 186,238 into the shank-pressing position, and is movable relative to the body 106,234 to facilitate removal of the shank from the chuck 30,232.

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. The body defines an air passageway extending through the body between the axial bore and an area about the tail section. A generally cylindrically sleeve is disposed about the body and substantially encloses the area. It is configured to extend to a housing of the drill so that air from the fan is forced into the area, through the air passageway and into the axial 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 tool driver includes a housing and a rotatable drive shaft extending therefrom. A chuck for holding the tool includes a generally cylindrical body having a nose section and a tail section. Each of a plurality of jaws is slidably positioned in one of a plurality of angularly disposed passageways in the body. Each jaw has a jaw face and threads formed thereon. A nut is in operative communication with the drive shall so that the drive shaft rotationally drives the nut. The nut threads engage the jaw threads so that rotation of the nut moves the jaws axially within the passageways. A sleeve is selectively actuatable to a first axial position and a second axial position. The sleeve defines a first slot that receives a detent mechanism in the first axial position and a second slot that receives the detent mechanism in the second axial position.

Abstract: A chuck assembly for use with a power driver having a forward end, a housing, a gearbox, and a rotating spindle extending therefrom includes a separate interface plate. The interface plate is received by and is rotationally fixed to the forward end and includes a forward face defining a center opening and a forward-facing rotational stop. The spindle extends through the center opening to receive a chuck. The chuck includes a body having a nose and a tail, the tail being configured to rotate with the spindle, and the nose including an axial bore. Chuck jaws are received by the body and movable toward and away from the chuck axis. A bracket is disposed about the body and extends rearward of the tail. The bracket defines a rearward surface engaging the stop to rotationally fix the bracket to the interface plate.

Abstract: A spindle (10) is arranged in a machine tool, said spindle (10) having an axis (46), a receptacle arranged in the axis (46) and provided for receiving a shaft of a tool holder (14), and a clamping mechanism for axial fixation of the shaft in the receptacle, the clamping mechanism comprising an axially movable clamping arbor (18) with a circumference, at least one segment (60) arranged at said circumference and having at least a first and a second radial operation position, whereby said at least one segment (60) fixes said shaft positively in said receptacle, when being in the first radial operation position, first guiding means acting between the clamping arbor (18) and the at least one segment (60) such that upon axial movement of the clamping arbor (18) the at least one segment (60) is radially transferred between said first and second radial operation positions, and second guiding means arranged for holding said at least one segment (60) in the defined way when being in said second radial operation positio

Abstract: The invention is an improvement to a chuck assembly of the type having a chuck hub with a longitudinally extending bore therein the longitudinally extending bore having a closed end, an open end, and a radially extending bit bore in communication with the longitudinally extending bore, and a bit ball movable in the ball bore between a first retracted position out of the longitudinally extending bore and a second engaged position partially in the longitudinally extending bore. The inventive improvement includes a shuttle slidably disposed in the longitudinally extending bore. The shuttle has a first longitudinally extending portion having a first lateral dimension and a second longitudinally extending portion having a second, smaller lateral dimension. The shuttle is movable longitudinally between a first release position and a second lock position.

Abstract: A tool or workpiece having a mounting collar centered on an axis and for internally with an axially directed shoulder is mounted on a bolder having a drive sleeve also centered on an axis and fitted coaxially over the collar and a plurality of angularly spaced jaws in the sleeve having axially outer ends each formed with a rearwardly directed face. The jaws are displaceable radially between an outer locking position with their faces bearing axially inward on the shoulder and an inner freeing position with their faces out of engagement with the collar. An axially displaceable actuating member in the sleeve moves the jaws between their inner and outer positions. Axially extending retaining fingers each have a rear end secured in the sleeve and a front end with a rearwardly directed face.

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 tool holder for releasably coupling a bit with a non-circular outer connector surface to a rotary driver. The tool holder includes a socket and a retaining mechanism coupled to the socket and operable in a retaining mode and a released mode. The socket includes a forward end with an opening extending rearwardly from the forward end. The opening also includes a non-circular cross-section adapted to receive the outer connector surface of the bit to couple the bit for rotation with the socket. The retaining mechanism is adapted to permit disposable of the bit into an operative position within the opening and to prevent axial movement of the bit out of its operative position when the retaining mechanism is in its retaining mode. The retaining mechanism is further adapted to permit axial displacement of the bit out of its operative position when the retaining mechanism is in its released mode.

Abstract: A drill/driver chuck mechanism has a cylindrical member 2 with a central axial bore 4. A plurality of further bores 6 are slanted with respect to the central axial bore 4. Jaws 8 each associated with a bore 6 are moveable via a jaw actuator 10. A jaw locking means 32-60 is coupled to the jaw actuator 10. The jaw locking means may move between an open position and a closed position such that the jaws may be locked within their respective bore 6 regardless of the degree of protrusion of the jaws 8 into the central axial bore 4.

Abstract: A mechanism for engaging a chuck to a chuck body includes a bore within the chuck body having first and second opposed channels in communication therewith. A shaft extending from the chuck is configured for seating in the bore and includes two opposed vanes for seating in the channels. The vanes are depressible allowing for initial bore penetration and seating of the chuck shaft into the bore. Upon seating the vanes are biased into the channels locking the chuck shaft in the bore. A tool provides for depression of the vanes allowing for removal of the seated chuck shaft from the bore. Alternative mechanisms for locking a chuck, chuck body and a driven shaft are disclosed.

Abstract: A mandrel assembly is usable with a hole saw and a drill bit. The mandrel assembly includes a body having a shank portion and an adapter receiving portion. The adapter receiving portion defines an adapter receiving cavity and including a first wall having a first detent hole extending therethrough. The mandrel assembly further includes a bit coupler secured to the body. The bit coupler is located within the adapter receiving cavity and defines a drill bit receiving portion. The drill bit receiving portion includes a bit receiving cavity and a second wall having a second detent hole extending therethrough. The mandrel assembly further includes an adapter configured to be received within the adapter receiving cavity, the adapter having an externally threaded portion configured to meshingly engage with a set of internal threads of the hole saw, the adapter further having a first detent groove defined in an outer surface thereof.

Abstract: A chuck assembly for use with a power driver having a forward end, a housing, a gearbox, and a rotating spindle extending therefrom includes a separate interface plate. The interface plate is received by and is rotationally fixed to the forward end and includes a forward face defining a center opening and a forward-facing rotational stop. The spindle extends through the center opening to receive a chuck. The chuck includes a body having a nose and a tail, the tail being configured to rotate with the spindle, and the nose including an axial bore. Chuck jaws are received by the body and movable toward and away from the chuck axis. A bracket is disposed about the body and extends rearward of the tail. The bracket defines a rearward surface engaging the stop to rotationally fix the bracket to the interface plate.

Abstract: A tool holder for releasably coupling a bit with a non-circular outer connector surface to a rotary driver. The tool holder includes a socket and a retaining mechanism coupled to the socket and operable in a retaining mode and a released mode. The socket includes a forward end with an opening extending rearwardly from the forward end. The opening also includes a non-circular cross-section adapted to receive the outer connector surface of the bit to couple the bit for rotation with the socket. The retaining mechanism is adapted to permit disposable of the bit into an operative position within the opening and to prevent axial movement of the bit out of its operative position when the retaining mechanism is in its retaining mode. The retaining mechanism is further adapted to permit axial displacement of the bit out of its operative position when the retaining mechanism is in its released mode.

Abstract: A tool holder of the hollow taper shank in a tool machine is disclosed. A resisting block supported by a spring is received within a tool holder. As the short knife is disposed within the tool holder, the elastic force of the spring can be overcome. At first, a plurality of steel balls and a resisting block are pushed inversely until the front edge of an wider portion of the short knife passes through the steel ball. Now, the spring will release the energy from elastic deformation so as to enforce the resisting block to move forwards and outwards so as to return to the original position. Thereby, the knife can be firmly secured.

Abstract: A tool holder holds a shank of a cutter tool. The tool holder comprises a supporting cylinder. An operation body moves between a locking positionand an unlocking position A locking member is supported by the supporting cylinder. The locking member moves radially in accordance with the position of the operation body. An engaging member is located between the supporting cylinder and the operation body. The engaging member moves between an engaging positionand a disengaging position When the engaging member is in the engaging position, the operation body is prevented from moving relative to the supporting cylinder and is held in the unlocking position and when the engaging member is in the disengaging position the operation body is allowed to move relative to the supporting cylinder. This mechanism facilitates smooth insertion of the cutter into the supporting cylinder.

Abstract: The invention is an improvement to a chuck assembly of the type having a chuck hub with a longitudinally extending bore therein the longitudinally extending bore having a closed end, an open end, and a radially extending bit bore in communication with the longitudinally extending bore, and a bit ball movable in the ball bore between a first retracted position out of the longitudinally extending bore and a second engaged position partially in the longitudinally extending bore. The inventive improvement includes a shuttle slidably disposed in the longitudinally extending bore. The shuttle has a first longitudinally extending portion having a first lateral dimension and a second longitudinally extending portion having a second, smaller lateral dimension. The shuttle is movable longitudinally between a first release position and a second lock position.

Abstract: A drilling or milling head, especially for printed circuit board milling machines and/or engraving machines, having a collet chuck (11) which can be actuated by a rapid change mechanism and which is driven by a transmission. The collet chuck is opened by an axial displacement relative to a clamping sleeve (50), with the force necessary for the displacement being transmitted via a friction clutch. The transmission includes a ball bearing (9) whose balls (12) are moved around a common axis in a concentric manner by a driving part (6) fixed on a motor drive shaft (5). In addition, the balls are mounted between two bearing surfaces (13, 14) which are aligned in a concentric manner with regard to the axis and which have a circular cross-section. The balls are at least partially engaged with the bearing surfaces in a positive manner.

Abstract: A chuck for holding a small bit and used with a table drill is provided for drilling a millipore. The chuck includes a holding jaw having four holders; a jaw-positioning guiding body with a square hole at the front portion for positioning the holding jaw; a crossing linkage for connecting the body to the jaw and having a crossing head and a project between which a groove is formed; a guiding jacket matched with the crossing linkage and the body; a positioning screw nut matched with the jaw-position guiding body; a screw collar matched with the crossing linkage; and a bevel gear housing housed around the screw collar for fixing it.

Abstract: A shank fitting structure simple in structure and easy to machine and assemble. A shank (20) has an external diameter large enough to allow it passage in a state where a detent member (5) is moved bach radially outward, and includes a stepped portion (21) for butting by providing a small diameter portion on the end side an d a recess (23) for housing the projecting part of the detent member (5) formed in the tip part. On the internal circumferential face of an opening part (2) of an arbor A, a first sleeve (6) is provided and pressed by an elastic member (8) toward the edge of the opening in such a way that its tip comes into contact with the stepped portion (21) of the shank (20) and its external circumferential face can keep the detent member (6) back toward the external circumference.

Abstract: A tool coupling includes first and second bodies held together by a clamping mechanism. The first body includes a first surface having a first serration formed therein, a first hole extending through the first surface, and a side surface having a second hole extending therethrough and intersecting the first hole. The second body includes a second surface facing the first surface and including a second serration configured to mesh with the first serration. A drawbar projects from the second surface and extends into the first hole. The drawbar includes a plurality of wedge surfaces. The clamping mechanism includes a screw disposed in the second hole and nuts threadedly mounted thereon for movement toward and away from the drawbar. Each nut includes a plurality of wedge surfaces arranged to engage the wedge surfaces of the drawbar to pull the second body toward the first body in a manner bringing the first and second serrations into meshing engagement with one another.

Abstract: A drill or milling head (1), especially for printed circuit milling machines and engraving machines, including a collet chuck (27) which can be actuated by a rapid change mechanism. The drill or milling head includes a drive shaft which can be connected to a motor (3a). The collet chuck (27) is opened by axial displacement opposite a clamping sleeve (29), and the force necessary for the axial displacement is transmitted via a friction clutch (19, 23). As a result the drill or milling head cannot be damaged, and there is no danger of injury when changing the tool if the user fails to turn the motor (3a) off beforehand.

Abstract: A tool driver includes a housing and a rotatable drive shaft extending therefrom. A chuck for holding the tool includes a generally cylindrical body having a nose section and a tail section. Each of a plurality of jaws is slidably positioned in one of a plurality of angularly disposed passageways in the body. Each jaw has a jaw face and threads formed thereon. A nut is in operative communication with the drive shaft so that the drive shaft rotationally drives the nut. The nut threads engage the jaw threads so that rotation of the nut moves the jaws axially within the passageways. A sleeve is selectively actuatable to a first axial position and a second axial position. The sleeve defines a first slot that receives a detent mechanism in the first axial position and a second slot that receives the detent mechanism in the second axial position.

Abstract: A chuck jaw that is configured and arranged to be used in combination with other chuck jaws for securely retaining a rotatable accessory, such as a drill bit, in position in a chuck assembly, where the chuck jaw includes a chuck jaw body that defines a generally longitudinal axis along the primary extension direction thereof and a chuck jaw tip that is positioned within the chuck jaw body and extends along at least a portion of the generally longitudinal axis of the chuck jaw body. The chuck jaw further includes an insulating material for preventing electrical current from passing between the rotatable accessory and the remainder of the chuck assembly via the chuck jaw.

Abstract: A bit attaching arrangement for a power tool has a collet nut threadably engaging a rotatably driven shaft of the power tool. The collet nut has a plurality of slots positioned on an outer peripheral surface. A first gear is disposed on the shaft so that rotation of the first gear causes rotation of the shaft. An actuating member having a second gear associated therewith is attached to the housing of the power tool. The actuating member also has a slot-engaging extension associated therewith. The actuating member is positionable between a first position and a second position. In the first position, the second gear engages the first gear and the extension engages one of the slots of the collet nut such that rotation of the actuating member results in rotation of the shaft while maintaining the collet nut at a generally fixed rotational location.

Abstract: A tool driver includes a housing and a rotatable drive shaft extending therefrom. A chuck for holding the tool includes a generally cylindrical body member having a nose section and a tail section. Each of a plurality of jaws is slidably positioned in one of a plurality of angularly disposed passageways in the body. Each jaw has a jaw face and threads formed thereon. A nut is in operative communication with the drive shaft so that the drive shaft rotationally drives the nut. The nut engages the jaw threads so that rotation of the nut moves the jaws axially within the passageways. A locking mechanism is mounted to at least one of the housing and the body and is selectively actuatable to a first operative position and a second operative position. In the first position, the locking mechanism rotationally locks the housing and the body with respect to each other. In the second, it permits relative rotation between the body and the housing.

Abstract: The elongate rod shaped non-impact and non percussion drilling tool comprises: a non-impact and non-percussion drilling tool or implement formation at an outer end of the shank, a portion of the shank having a polygonal cross section at a location on the shank other than at an inner end of the shank, an annular groove in the shank which is only wide enough to receive a detent to prevent axial movement of the tool when it is received in a snap-in chuck assembly and a spline formation at an inner end of the shank. The chuck assembly includes either a polygonal drive structure in a center bore of the chuck assembly or a rotatable nose collar or an axially movable nose collar whereby a tool received in the center bore is held by friction in the polygonal drive structure or by a rotatable movement or an axial movement of the nose collar.

Abstract: A self locking device for a power tool includes a cylindrical member for receiving a tool member, three or more pawls slidably engaged into the cylindrical member to engage with the tool member and each having a threaded surface, a barrel threaded with the threaded surfaces of the pawls and having one or more teeth extended from one end. A ferrule is rotatably engaged on the barrel and may be forced toward the barrel to hold the barrel in place for allowing the pawls to be rotated relative to the barrel to engage with the tool member when the barrel is secured to the ferrule.

Abstract: An improved two-ended reversible drill/driver tool for use with power drills. The tool having a hollow cylindrical socket that at one end has a drive shank for insertion into a chuck of a powered drill, and, at the opposite end, has a polygonally shaped opening therein for receiving a correspondingly shaped, two-ended, reversible tool assembly. This tool assembly is sized to slide within the hollow socket, and has a combined drill bit and countersink at one end, and, at the other end, a polygonally shaped opening for accepting a screw driver bit having a shank with a polygonal cross section.

Abstract: A rotary power tool designed to accept a wider range of tool shank diameters, and particularly larger diameters, without any special adapters, including a threaded output spindle with a stepped internal bore including an enlarged counter bore at its end. A one-piece collet having jaw segments, central shank portion, and a base is seated in the spindle bore so the jaw segments are cammed directly by the spindle end, and a collet nut threaded on the spindle, cams the distal ends of the jaw segments against the tool shank. The collet is designed so the larger tool shanks spread the jaws upon collet entry causing the shank portion of the collet to bulge outwardly as the collet jaws are cammed back into parallel relation against the large tool shank. This, in short, enables a smaller size collet to receive and clamp larger diameter tool shanks.

Abstract: A chuck assembly (22) for releasably attaching a cutting accessory (23) to a rotary driven tool such as a surgical drill (20). The chuck assembly includes a chuck head (30) from which a drive spindle (36) extends rearwardly. Clamping jaws (34) extend from the front end of the chuck head to hold the cutting accessory in place. The chuck head, the drive spindle and the clamping jaws can rotate in unison about a common axis of rotation. Alternatively, the chuck head and the drive spindle can be rotated relative to each other around this common axis to lock and unlock the jaws. A spindle lock housing (41) is located between the chuck head and the drill to which the chuck head is attached. The drive spindle (36) extends through the spindle lock housing (41). A moveable switch (88) is mounted to the spindle lock housing (41). The switch can be positioned to engage the drive spindle to prevent rotation of the spindle.

Abstract: A handheld rotary power unit includes a housing with a handle and a distal end portion, a motor shaft extending through the distal end portion of the housing, and a quick-release chuck assembly connected to the motor shaft. An actuator assembly is provided on the housing that enables a user to operate the quick-release chuck assembly with a hand of the user while that hand of the user is holding the handle portion of the housing. Actuator assembly examples include an electrically powered solenoid, a manually powered linkage, and a pneumatically powered piston.

Abstract: A tool bit holder having a collet nut engageable with a rotary and/or reciprocating output shaft having a hollow free end with a collet, having jaws with respective head and shank portions, disposed in the hollow interior of the collet nut and an annular expansion insert member having an aperture of a diameter greater than the diameter of the hollow free end of the tool output shaft through which the shank portion of the collet jaws extend, with the expansion insert member having a proximal end engageable with the free end of the output shaft and a distal end engageable with the heads of the collet jaws, provides improved capacity for the tool bit holder to accommodate a greater range of tool bit sizes.

Abstract: A bit attaching arrangement for a power tool includes a bit locking member rotatable with respect to the output shaft of the power tool. A first gear is fixed to the bit locking member so that rotation of the first gear causes rotation of the locking member. A second gear is fixed to the output shaft so that rotation of the second gear causes rotation of the output shaft. A third gear engages both said first and second gear simultaneously and is capable of rotation by an operator of the power tool. Rotation of the third gear results in counter rotation between the bit locking member and the output shaft so as to result in securement of the bit to the shaft. A further aspect of the invention includes a pinion shaft onto which the third gear is mounted.

Abstract: A drill has a drill spindle centered on and rotatable about an axis and having a front externally threaded end and immediately thereadjacent a shank. A chuck element centered on the axis is formed with a forwardly open tool hole, axially therebehind with a threaded bore complimentarily engaging the spindle end, and immediately therebehind with a coaxial unthreaded bore surrounding the shank. An adjustment element is rotatable about the axis on the chuck element. One of the elements is formed with a plurality of angled guide passages and the other element is formed with a screwthread centered on the axis. Respective jaws in the passages and exposed in the tool hole each have a toothed edge meshing with the other-element screwthread so that relative rotation of the elements displaces the jaws along the respective passages.

Abstract: A combination of an insertable tool (2), e.g. a drill or chisel, for an electrical machine for drilling and/or impact operation and a tool holder (20) for the insertable tool is disclosed. The insertable tool includes a tool shaft (11) provided with a round core cross section (1) not weakened or reduced at any point along the tool shaft (11) up to an inserted tool shaft end. The tool shaft has longitudinal struts (6) for torque transmission and axial guidance extending beyond the round core cross section (1) and the longitudinal struts (6) are shaped to merge with the core cross section in front of a cylindrical end portion (3).

Abstract: A chuck has a chuck body formed centered on an axis with a rearwardly open hole adapted to receive a drill spindle and with a plurality of axially forwardly and axially rearwardly open guide passages, an adjustment ring axially fixed but rotatable about the axis on the chuck body and formed with an internal screwthread, and respective jaws displaceable in the passages between axially front and radially closely spaced positions and axially back and radially widely spaced positions and having teeth meshing with the screwthread. The jaws project in the back positions rearward from the chuck body axially rearward past the hole receiving the spindle so that rotation of the ring in a forward direction on the chuck body displaces the jaws axially forward and radially inward and opposite rotation of the ring in a reverse direction on the chuck body displaces the jaws axially rearward and radially apart.

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. The collet is retracted into the holder body via the intermediate rod by rotating the clamp bolt in the first direction, and presses and holds a cutting tool. In this event, a head of the clamp bolt comes in pressure-contact with a stepped surface of the holder body by surface friction and rotates. On the other hand, in order to release the cutting tool, the clamp bolt is rotated in the second direction opposite to the first direction. In this event, the clamp bolt is rotated by rolling friction via steel balls inserted between the head and a center hole of the holder body, and the collet is pressed out forward.

Abstract: A rotary power tool is provided having a remotely actuated chuck device. The chuck is mounted onto the end of a drive spindle that extends from the casing of the power tool. The chuck includes an outer sleeve member that is axially movable relative to the drive spindle between a gripping position and a release position. A sleeve actuating device is provided having a first member engaged with the outer sleeve member and which extends generally radially outward from the drive spindle or chuck. The first member is movable in a direction so as to move the outer sleeve member between the gripping position and the release position. The sleeve actuating device includes an actuator member configured with the first member to move the first member upon an external force being applied thereto. In this manner, an operator can move the chuck device between the gripping and release positions at a location remote from the chuck device and drive spindle.

Abstract: A combination of a drill and a device for securing the drill in a chuck which has a body with a central passage and three slots inclinedly defined in a periphery defining the passage. Three clamping members are inclinedly and movably received in the slots and engaged with an annular member rotatably mounted to the three clamping members. The body has at least one aperture defined radially therethrough which communicates with the passage in which the drill is received which has a plan surface defined in an outer periphery thereof such that a positioning member received in the aperture contacts the plan surface to position the drill in place.

Abstract: A drill has a drill housing and a drive spindle centered on and rotatable about an axis, projecting axially outward from the housing, and having an outer end. A chuck element is fixed on the spindle outer end and an annular formation is axially fixed on the housing, centered on the axis, and extends axially to the chuck element. The formation defines with the chuck element an annular chamber. An adjustment ring element is axially fixed but rotatable about the axis on the chuck element. One of the elements is formed with a plurality of axially forwardly open guide passages open axially rearward into the chamber and the other of the elements is formed with a screwthread centered on the axis. The elements both are rotatable about the axis relative to the formation.

Abstract: A tool holder that allows floating to accommodate radial displacement including: a shank, having a bore at one end, the bore being perpendicular to the longitudinal axis of the shank; a mounting head, with cavities at both ends at least one bore extending radially to each cavity from the outside surface of the mounting head, wherein the shank extends into the cavity at one end of the mounting head; a tool mounts in the other cavity of the mounting head; a pin connecting the shank and the mounting head, with a sliding fit through the bore of mounting head, and a clearance fit through the shank, wherein the clearance fit and clearance between the shank and the cavity member allows a floating freedom of slightly greater than twice the anticipated eccentricity between the centerline of the shank and the centerline of a workpiece hole; and a device for securely engaging the tool in the cavity at the first end of the mounting head.

Abstract: An improved coupling system for lockably coupling machine tool components is provided that includes a male coupling, a female coupling having an axis, a pair of opposing jaw members having lock surfaces for engaging ledge surfaces in the male coupling when the jaw members are moved apart, and a drive train having first and second drive spheres for simultaneously moving proximal and distal ends of the jaw members apart. The drive spheres engage ramps on the inner surfaces of the jaw members that have cylindrical profiles to provide lenticular contact between the spheres and the jaw members. Cam and follower surfaces are provided between the jaw members and one of the male or female couplings to enhance the locking force between the couplings. The invention provides a more rigid coupling between the male and female components by providing two locking spheres that operate in tandem to simultaneously spread the distal and proximal ends of the jaw members apart.

Abstract: The invention concerns a facing-tool head with a main body (10) which can be attached to a machine spindle, a work slide (14) which can be moved along the main body (10) essentially at right angles to the axis (12) of the spindle and which has a tool-holder with a fixing mechanism (26) to hold a tool in place, and a mechanism for adjusting the work slide (14). This adjustment mechanism includes a central, longitudinally movable adjusting rod (18) which passes through the hollow machine spindle (44) into the main body (10) and gearing means (20) which translate the longitudinal motion of the actuator rod into the transverse motion of the work slide (14).

Abstract: A combination of a tool holder and a tool. A tool holder having radially movable gripping members defining an axial tool shank receiving passage therebetween. A tool having a shank portion received in the shank receiving passage of the tool holder. The gripping members and the shank portion of the tool defining cooperating male and female retainers for releasably retaining the shank portion of the tool within the shank receiving passage of the tool holder. The female retainer comprising an annular channel for receiving the male retainer therein; and the gripping members of the tool holder and the shank portion of the tool comprising cooperating first and second torque transmission surfaces, respectively, for transmitting a driving torque from the tool holder to the tool so as to rotate the same about its longitudinal axis.

Abstract: A tool bit chuck for holding a bit (1) with axially extending grooves (2) closed at the ends thereof spaced apart in the axial direction. Latching elements (4) in the form of cylinders are radially displaceable into and out of the grooves (2). The latching elements (4) have an axis of rotation extending transversely of the axis of the receiving sleeve (3) in the chuck, whereby the latching elements (4) act as roll bodies in the event of an axial shift between the bit (1) and the receiving sleeve (3) so that friction which could result in premature wear, is prevented.

Abstract: The present invention uses a collar that fits over a nose and a locking cylinder of a chuck of the drilling machine. The collar has a cutout section to accommodate the chuck key including the key gear when it is engaged with the beveled gear of the locking cylinder. The collar has a first bore of a first diameter with is slightly larger than the outer diameter of the nose to provide a tight fit between the collar and the nose of the chuck. A fastener is used to attach the collar to the nose of the chuck. A second bore has a second diameter to fit over at least the beveled gear of the locking cylinder. The second diameter is large enough to provide a clearance so that the locking cylinder is free to rotate within the collar. Turning the chuck key about a key axis opens or closes the jaws of the chuck to grip or release a bit placed along a drill axis of the drilling machine.