Abstract: A technique capable of easily and highly accurately perform positioning of a lens member having a convex optical surface. A lens positioning mechanism is configured to include: a member holding unit that has a function of holding a lens member via an auxiliary tool attached to a second surface of the lens member having a first surface, which is a convex optical surface, and the second surface, which is an optical surface facing the first surface, and biasing the held lens member toward a side of the first surface; and an attitude control unit that abuts on a predetermined portion on the first surface of the lens member biased on the member holding unit to regulate a position of the predetermined portion and positions the lens member in a predetermined attitude.

Abstract: A removable assembly (38) comprising an information holding unit (36). The removable assembly is positionable in a material object (2), such as a tool, tool component or part, machine, machine component or part, device, etc., and can be removed therefrom by fluid pressure whereby the material object can be subjected to processing that would otherwise cause damage to, or destroy, the information holding unit (36).

Abstract: A needle member for use as a knitting needle and methods of making the same are disclosed. An example needle member may be formed of a metallic material and include a solid tip end and a connecting end opposite the tip end. The connecting end may have a threaded portion configured to be selectively secured to a flexible cable by rotating the needle member relative to the cable, and a solid body extending longitudinally from the solid tip end to the connecting end which defines a needle grip aperture. The needle grip aperture may be fixed within the solid body relative to the threaded portion of the connecting end. An interchangeable knitting needle set may be provided, which includes a plurality of needle members and different length cables for selectively connecting two of the needle members to create different knitting needles having different lengths or needle diameters.

Abstract: A cutting device is disclosed. The cutting device has a body member having a cavity that extends from an opening at a front end portion of the body member toward a back end portion of the body member. The cutting device also has a cutting member partially disposed in a first portion of the cavity, a first urging member portion disposed in a second portion of the cavity, and a second urging member portion disposed in a third portion of the cavity. The first portion of the cavity is disposed between the second portion and the third portion of the cavity. The cutting member is removably disposable in the first portion of the cavity between the first urging member portion and the second urging member portion.

Abstract: A method for cutting a bone of a patient using a bone saw tool that includes determining a cutting region that corresponds to a region of the bone to be cut and determining the position of the bone saw tool in the coordinate system. The method includes activating a bone saw blade guard of the bone saw tool if the bone saw tool is outside the cutting region.

Abstract: Disclosed are devices and methods for creating a bore in bone. The devices and methods described involve controlling the drive and measuring the drilling energy of a working tool such that a user can avoid injuries to surrounding structures.

Abstract: A receiver comprises an interior space comprising a longitudinal central axis and a receiving end, a first set of first structures, and a second set of second structures. The first set of the first structures is positioned closer to the receiving end of the interior space than the second set of the second structures. The first set of the first structures has a first axial compliance coefficient along the longitudinal central axis of the interior space. The second set of the second structures has a second axial compliance coefficient along the longitudinal central axis of the interior space, such that the first axial compliance coefficient is greater than the second axial compliance coefficient.

Abstract: The arrangement comprises a fluid bearing comprising a first fluid bearing element located in a bearing housing and a piston located in a pump housing. The bearing housing comprises a bearing housing opening. The pump housing comprises a pump housing opening. The first fluid bearing element is connected to the piston by means of a connection means extending from the first fluid bearing element through the bearing housing opening to the piston through the pump housing opening. The piston is arranged to reciprocate in the pump housing. The pump housing is connected to a fluid reservoir by means of a first inlet. The bearing housing comprises a first outlet for allowing fluid to exit the bearing housing. The arrangement further comprises a fluid transport means fluidly connecting the pump housing and the bearing housing.

Abstract: The present invention is directed to a bi-stable coupling for controlling the depth of a tool insertion, such as drilling, and similar processes. The bi-stable coupling can be used to penetrate (e.g., drill or push) through a material layer of unknown thickness without plunging the tool into the adjacent layer. In accordance with the invention, in a first state, force is applied to the tool to initiate penetration and a reactive force maintains the device in the first state during penetration and when tool penetrates the material, the reactive force is diminished enabling the device to transition to a second state in which the tool becomes retracted. In medical applications, the invention allows for drilling through bone of unknown thickness without plunging into the adjacent soft tissue.

Abstract: The invention relates to a workholder (10) for holding a workpiece to be processed in a machine tool, which workholder (10) is in the form of a annular body (12) having a central through hole (14), said annular body (12) having at least one weakened area (18, 20; 34, 36, 38, 40; 50, 52, 54, 56) obtained by material removal, as well as at least one pressure chamber (22; 42, 44; 58, 60) assigned to said at least one weakened area (18, 20; 34, 36, 38, 40; 50, 52, 54, 56) that can be charged with a pressurized fluid. Said at least one weakened area (18, 20; 34, 36, 38, 40; 50, 52, 54, 56) is dimensioned and arranged so as to cause said annular body (12) to be elastically deformable in an axial and/or a radial direction (a, r). As a result, with pressure acting on said pressure chamber (22; 42, 44; 58, 60), said annular body (12) can then be deformed elastically in a well-defined manner in an axial and/or a radial direction (a, r).

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 handheld machine tool having an output shaft on which a tool holding fixture is developed, which has a multi-faced inner receptacle and a multi-faced outer receptacle, the multi-faced inner receptacle to connect to a tool insert, which can be locked using a locking device assigned to the tool holding fixture; the locking device having a locking sleeve which is displaceable for unlocking the tool insert against a spring force applied by an associated spring element in an axial direction facing away from the handheld machine tool, from a locking to an unlocking position, the locking sleeve has an operating element and a holding element connected to each other via a threaded connection, the holding element driven by the associated spring element in the direction of the locking position of the locking sleeve and the operating element enables displacement of the locking sleeve from the locking to the unlocking position.

Abstract: A hydraulic expansion chuck for receiving a tool includes a chuck body, an expansion bushing which is received in the chuck body and defines a chuck opening, a pressure chamber which is interposed between the expansion bushing and the chuck body, and a reduction sleeve. The reduction sleeve is received in the chuck opening of the expansion bushing and defines a tool holder receptacle for receiving the tool to be chucked. The reduction sleeve includes a connector element configured to releasably attach the reduction sleeve to the chuck body. The reduction sleeve also may include an adjustment element configured to adjust the axial position of the tool in the tool holder receptacle.

Abstract: A tool bit holder assembly includes a shank receivable in a tool holder of a rotary tool, and a body defining a socket that removably receives a tool bit. An annular recess, defined in an exterior surface of the body, has a front and rear shoulders and an axial length. A floating sleeve with a ring magnet at its front end is slidably received over the body with an elastic retainer movably received in the annular recess. The elastic retainer has an axial length less than the axial length of the annular recess to enable the sleeve to float axially between a rear position where the retainer abuts the rear shoulder and a front position where the retainer abuts the front shoulder. The sleeve is axially moveable rearward from the rear position to a parked position where the elastic retainer engages the body rearward of the rear shoulder.

Abstract: An upright chuck assembly includes a base having two elongate notches respectively defined in two sides thereof. A rotary device is connected to the base and includes a horizontal gear set and a vertical gear set which are engaged with the horizontal gear set in the body of the rotary device. An insertion extends from the horizontal gear set and is inserted into one of the adjustable members. The vertical gear set has a connection portion on the top thereof, and a T-wrench is mounted to the connection portion. The rotary device is cooperated with a vertical machine center.

Abstract: A tool holding system for a rotary power tool is configured to clamp around a working tool when the working tool is inserted in the tool holding system. The tool holding system includes a sleeve having a frustroconical inner surface portion, a collet having frustoconical outer surface portion complementary to the inner surface portion, a spring mount operably connected to a motor for rotation by the motor, and a spring. The spring includes a first end portion operably connected to the collet to bias the collet toward a first position whereat the outer surface portion engages the inner surface portion, and a second end portion rotationally fixed with respect to the spring mount.

Abstract: A collet for connecting a tool to a driver includes a shaft having an end. The collet includes a body including a first end that connects to the driver and a second end having an internal space partially defined by a frustoconical bore and a plurality of jaws disposed within the space. Each of the jaws includes a body having a frustoconical surface arranged to engage the frustoconical bore and an engagement member coupled to each body to move between an unlocked and a locked position. Rotation of the tool about the axis in a first direction biases the engagement member toward the unlocked position to allow movement of the tool with respect to the jaws, and rotation of the tool about the axis in a second direction opposite the first direction biases the engagement member toward the locked position wherein the tool is fixed with respect to the jaws.

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 arrangement and chuck apparatus for quick change of a range of tools; particularly, a quick change chuck adapted to engage various diameter drill bits, tools and tool holders. The tools are rotatable in a chuck or adaptor and have at one end a centering shaft portion having a constant diameter for multiple tool end diameters and shapes, a drive shoulder portion and a lock portion. The chucks have a tool centering arrangement for accommodating the constant diameter centering shaft. The chucks are also described as having tool bit release mechanism operable to disengage the tool from a retention mechanism when a force is applied inwards of the body of the chuck by the user to allow the tool bit to be removed longitudinally from the chuck but also arrange to allow the tool bit to be inserted longitudinally into the chuck without requiring any other user operation.

Abstract: A sleeve for heating a toolholder is magnetizable and has a sleeved space, at least one slit, and an abutting surface. The sleeved space is formed along an axial direction of the sleeve. The at least one slit is formed on the sleeve. The abutting surface is formed inside the sleeve. The sleeve is mounted around a toolholder by the sleeved space, and the abutting surface abuts the cutting tool. The sleeve can be heated by electromagnetic force, especially for steel material containing high chromium, and heats the toolholder by heat conduction. As a result, the toolholder can be heated easily by the sleeve, and can be mounted tightly and firmly around a cutting tool.

Abstract: Provided is a tap holder configured so that compression-side elastic characteristics and tension-side elastic characteristics are different from each other with utilization of an elastic member for absorbing synchronization error in rotation and feeding of a spindle of a machine tool. The tap holder includes a chuck 20 for holding a tap P, and a holder body 10 for holding the chuck 20 so that the chuck 20 is movable along a rotational axis X and rotatable in synchronism with the chuck 20.

Abstract: An apparatus is provided that is configured for attachment to an aerosol can to permit mixing of contents therein. The apparatus includes a generally flat base portion coupled to a drive shaft orthogonally oriented relative to the base portion, and a securing strap attached to the base portion. The securing strap is configured to engage or grip a cylindrical end portion of an aerosol can to secure the aerosol can to the apparatus, whereby the drive shaft is configured to be mounted within a drill chuck to permit the mixing apparatus to rotate an aerosol can attached thereto for mixing contents within the aerosol can.

Abstract: The present disclosure relates to a tool holder to receive and lock a tool taper on a tool magazine, an unlocking device to unlock a tool taper that is received and is locked in a tool holder of this type, and a tool magazine for a machine tool comprising one or more tool holders of this type and an unlocking device of this type.

Abstract: A power tool adaptor for holding a tool adapted thereto including an adaptor body, a tool insertion cavity formed in an end of the adaptor body for receiving the tool, an elongated tool bit insertion cavity formed as a continuation of the tool insertion cavity, means for fixating the tool by protruding into one or more fixation recesses on the outer surface of the tool and means for attaching the power tool adaptor to a power tool; a reversible tool bit holder is further disclosed for holding two changeable tool bits, which reversible tool bit holder is adapted to fit into the power tool adaptor, along with a kit including a power tool adaptor and a reversible tool bit holder adapted to fit into the power tool adaptor.

Abstract: A chuck for clamping an article has a receiving portion including a receiving bore having a longitudinal axis L, and a radially inwardly facing contoured clamping and receiving inner surface. A clamping sleeve is accommodated in the receiving bore and is rotatable between a releasing position and a securing position. The contoured clamping and receiving surface has one or more clamping segments, each clamping segment having a ramp between a trough and a crest, a second ramp between the crest and a depression, and a third ramp between the depression and the succeeding stop ridge. Rotating the clamping sleeve within the receiving bore causes one or more rollers associated with each clamping segment to cooperate with the contoured clamping surface to effect the releasing and the securing of the article.

Abstract: A bit holder assembly for a rotary hand or powered tool, includes a body having a hex shank at its rearward end and a retraction collar slidably disposed on the body. The body has a coaxial hex socket formed therein to allow a tool bit to be inserted thereinto. A coil spring biases the retraction collar forwardly and biases a retaining clip toward the bottom of an angular slot formed in the body. The bit is removed by sliding the retraction collar rearwardly, to compress the coil spring and allow the retaining clip to retract back up the slot. A ring magnet is disposed at the forward end of the retraction collar to magnetize a fastener to retain the fastener to the bit.

Abstract: A rotary tool for coupling with a rotary tool accessory includes a motor and a power shaft operably coupled with the motor. A collet is operably coupled to the power shaft, the collet including a longitudinally extending inner surface portion. A nickel based bonding material is affixed to the longitudinally extending inner surface portion. A plurality of abrasive particles extend outwardly of the bonding material on the longitudinally extending inner surface portion, wherein generally between about 30 percent and about 55 percent of each abrasive particle of the plurality of abrasive particles extends outwardly of the nickel based bonding material.

Abstract: The invention relates to a tool holder with a tool holding fixture, in particular a clamping chuck such as a contracting chuck, a draw-in collect chuck, a hydraulic expanding chuck and a high-precision chuck, and a shank of a tool, in particular a rotary tool, accommodated in it, wherein the tool holder contains a means for preventing the tool from being pulled out, locking it against axial displacement. This pull-out preventing unit comprises at least one locking element and at least one locking groove, which corresponds to the said locking element, receives it and interacts with it in a positively locking manner. In this case, both the locking element and the locking groove are formed at least partly in the manner of a ball head. Preferably, the tool has the locking grooves.

Abstract: The invention relates to tool mount with a base body and a receptacle that is joined with the base body for torque transmission and anchored in the base body in an axially movable manner with a spring preload. The base body exhibits a shank section with a recess that is open on the machine tool side, and a bushing section that axially lengthens the shank section, with a guide borehole that is open on the tool side and separated from the recess of the shank section by a radial dividing wall. The receptacle exhibits a guide section that is guided in the guide borehole of the bushing section in an axially movable manner. The receptacle is anchored by means of an anchor that passes through an axial opening in the radial dividing wall and can be actuated for setting the spring preload via the recess of the base body.

Abstract: Several preferred embodiments are disclosed for a tool-less blade clamping apparatus for a reciprocating tool of the type which has a reciprocating plunger which has a tool attachment receiving slot for receiving a tool attachment of the type that has a shank portion. The clamping apparatus has an unclamped position and a clamped position. In the unclamped position, a tool attachment can be easily inserted and when it is in its clamped position, the tool attachment is securely retained. The preferred embodiments have at least one spring biasing the apparatus toward the clamped position, a releasable retaining mechanism for holding the apparatus in its unclamped position after being placed in that position. When the blade shank portion is inserted into the slot a predetermined distance, the shoulders of the shank portion release the retaining mechanism to move it to its clamped position.

Abstract: A cutter-tooling assembly has a tool holder and a cutter. The tool holder has an inserted section and a through hole axially formed through the inserted section. The through hole has a fixing segment. The fixing segment has an inner surface and multiple recesses formed around the inner surface of the fixing segment at intervals. The cutter is inserted into the through hole of the tool holder and has a fixing end. The fixing end has an outer surface and multiple corners formed on the outer surface of the fixing end and abutting the recesses. Because the fixing segment has the multiple recesses which the corners of the cutter abut, the combination of the recesses and the corners can prevent a relative rotation between the tool holder and the cutter and make the cutter securely connected with the tool holder.

Abstract: A drill bit locking device and a drill bit are provided. The locking device includes a boss with a through hole, a bearing and a support member are arranged an inner wall of a small cylinder above the boss; a locking sleeve is sleeved over the boss, a first bulge is on an inner wall of an upper part of the locking sleeve, and a second bulge is on an inner wall of a lower part; a spring is between the second bulge and an upper bottom surface of the boss; a press plate is threadedly connected with an outer wall of a top part of the small cylinder and presses against the first bulge; holes of different sizes are on the inner wall of the small cylinder and the support member to form a stepped hole, and a steel ball is arranged in the stepped hole.

Abstract: A drill head locking apparatus and a drill head are provided. The locking apparatus includes a protruding platform having a through hole, a bearing on the inner wall of a small cylinder on the protruding platform, a locking sleeve fitted on the protruding platform, and a protrusion arranged on the upper part of the inner wall of the locking sleeve. The lower part of the inner wall of the locking sleeve is a conical face. A spring is arranged between the bottom face of the conical face and an upper bottom face of the protruding platform. A press plate is connected with a screw thread on the outer wall of the top part of the small cylinder on the protruding platform and presses down on the protrusion. A conical hole is arranged on the wall of the small cylinder and communicates with the through hole of the protruding platform.

Abstract: In a handheld machine tool having a tool holding fixture, which has a multi-faced inner receptacle and a multi-faced outer receptacle, the multi-faced inner receptacle being configured for the connection to a first tool insert, which is able to be locked in the multi-faced inner receptacle using a locking device assigned to the tool holding fixture, and the multi-faced outer receptacle being configured for the connection to a second tool insert, which has an inner multi-faced coupling that is able to be slid onto the multi-faced outer receptacle. The locking device has an actuating element, which is rotatable about a longitudinal axis of the tool holding fixture for unlocking the first tool insert from a specified locking position into a specified unlocking position.

Abstract: An electric screwdriver is disclosed. The screwdriver has a spindle, a locking body, a radial stop, a strap, and a spring. The spindle defines a receiving area and an oblong hole which is open into the receiving area in a radial direction. The locking body is disposed in the oblong hole, where the locking body is protrudable into the receiving area. The radial stop is engageable with the locking body where, when the radial stop engages with the locking body, the locking body protrudes into the receiving area. A first end of the strap engages behind the locking body on a drive end. The spring is disposed between a second end of the strap and the radial stop.

Abstract: A shrink-fit chuck tool holder which comprises: clamping means which are provided centrally with respect to an axis of rotation of the tool holder for holding a shank of a rotary tool, and which define a receiving opening for the shank. The clamping means can be displaced in the radial direction between a release position for insertion or removal of the shank and a clamping position. The clamping means are assigned a clamping surface with a cylindrical contour which, in the clamping position, bears against the outer circumferential surface of the shank. The clamping surface has a helical groove surrounding the axis of rotation or a multiplicity of annular grooves surrounding the axis of rotation, which as seen in the direction of the axis of rotation project towards the axis of rotation and the roof surfaces of which form the clamping surface.

Abstract: A tool holder comprising a base element, a deformable receiver for clamping a tool and at least one locking element configured for preventing an axial extraction of the tool from the tool holder through engaging a corresponding opposite element at the tool, wherein the at least one locking element is integrally configured in one piece with the receiver.

Abstract: The tool mounting device according to the invention comprises a first and second coupling device, wherein the first coupling device comprises at least one receptacle, the second coupling device comprises at least one receptacle pin, and the first or second coupling device comprises a tool suspension. The receptacle comprises a recess and an opening, wherein the opening extends from the first end in the direction of the second end over a length and the length of the opening is smaller than a length of the recess and a width of the opening is greater than or equal to a width of the receptacle pin.

Abstract: A quick change system for quench press tooling is disclosed. The system including an upper adapter subassembly, an inner bottom adapter, and an outer bottom adapter, the upper adapter subassembly configured for attachment to a machine and the bottom adapters configured for mechanical attachment to the tooling of the machine. The upper adapter assembly further including an inner top adapter having a plurality of notches radially along the outer diameter of the inner top adapter, an inner collar having a plurality of radially inwardly extending tabs at top and bottom ends of the inner collar, a ring shaped holding plate having a series of bolt holes, an outer top adapter in communication with the holding plate, having a notched outwardly extending flange lip, and an outer collar having an outwardly extending lip at a top end and a sidewall extending perpendicularly downward.

Abstract: A drilling apparatus has a housing, a motor in the housing, a drive spindle rotatable about an axis on the housing, a chuck body, and a plurality of jaws shiftable in the chuck body. First and second elements interconnected by a screw thread and engaged between the body and the jaws for shifting the jaws on the housing. A drive sleeve rotationally fixed to the first element is drivable by the motor.

Abstract: The present invention is directed to an arbor chuck workholding assembly comprising an arbor chuck (2), outer ring (6), clamp ring (8) and backing ring (10). The arbor chuck comprises a plurality of holding angle lugs (18) and ejecting angle lugs (20) located about its periphery. The outer ring (6) comprises a plurality of complementary holding angle ramps (22) and ejecting angle ramps (24) located on its inner diameter surface. A machine spindle (4) is rotated to engage the holding angled lugs (18) with the holding angle ramps (22) such that the arbor chuck will be drawn into position against the spindle. For disengaging, a reverse rotation of the spindle will result in ejecting angle ramps (24) engaging ejecting angle lugs(20) to loosen the arbor chuck from the spindle. Therefore, no tools are required to secure the arbor chuck to the machine spindle.

Abstract: A cutting tool assembly having a tool holder and a cutting tool. The cutting tool has a shank that is matingly received within an axial bore in the lower end of the tool holder. The shank includes an eccentrically-shaped driver portion. The tool holder's axial bore includes an enlarged eccentrically-shaped drive opening which is complementary in shape to, but slightly larger than, the driver portion. When the shank is inserted into the axial bore, the driver portion and drive opening are aligned allowing the cutting tool to be partially rotated relative to the tool holder. This partial rotation abuts a portion of the eccentric driver portion against the drive opening wall to provide rigid support of the cutting tool against further rotation as the tool assembly cuts. A cammed fastener releasably interlocks the partially rotated cutting tool within the tool holder.

Abstract: An easily-positioned cutter chuck has a through hole formed through the cutter chuck. The through hole has an end and a reamed part formed at the end of the through hole and reaming outwardly at two gradients. Because the reamed part enlarges an area ratio of an opening of the through hole to an end surface of the cutter chuck, a protrusion of a positioning apparatus can be easily aimed at and inserted into the reamed part. Because the cutter chuck can be held and positioned steadily by the positioning apparatus, tolerances of the cutter chuck can be well controlled when the outer surface of the cutter chuck is processed for polishing.

Abstract: A securing mechanism is provided for a tool that allows for the attachment and release of the shafts of a variety of implements from the tool. The mechanism has a construction that provides an easily releasable, but secure engagement of the implement shaft within the mechanism while also having an alignment feature which engages the implement at multiple locations when engaged with the mechanism to maintain the alignment and concentricity of the implement shaft with regard to the mechanism and the tool when in use.

Abstract: The invention relates to a chuck with a chuck body (2) having a centering hole (3) that is tapered frustoconically and in which is provided a clamping member (4) having a clamping thread (5), with an angle drive (8) having a threaded ring (6) engaged with the clamping thread (5), axially fixed to the chuck body (2), coaxial to the clamping member (4), and rotatable by a drive member (9) that can be rotated about a drive axis that is not parallel to the chuck axis. The drive member (9) can be inserted from the end opposite to the centering hole (3) into a body cavity (10) that can be closed by a plate (11) that is supported on the chuck body (2) and/or the threaded ring (6). The drive member (9) is accessible for a drive tool through an aperture (12) in the cavity wall (13).

Abstract: The invention relates to a tool holder comprising a tool receptacle in the form of a sleeve part, which comprises a tool receptacle opening comprising a mating surface which is concentric with the axis of rotation of the tool holder and on which the shaft of a tool inserted in accordance with the intended purpose thereof into the tool receptacle opening of the sleeve part can be fixed in a press fit, wherein the sleeve part comprises a number of circumferential recesses from the side of the mating surface, wherein the recesses divide the mating surface into several mating surface segments which are comparable to each other and which are substantially inherently rigid in the axial direction, wherein the radial depth of the recesses is selected such that the press fit releases substantially uniformly on all mating surface segments under the influence of heat applied over the outer circumference of the sleeve part.

Abstract: In a hand-held power tool having a tool holder equipped with a multisided internal socket for connecting to a first insert bit and with a multisided external socket for connecting to a second insert bit, the tool holder being associated with a locking device for locking the first insert bit in the multisided internal socket, the locking device has an actuating element that it is possible to slide from a locking position into an unlocking position in an axial direction oriented away from the first insert tool in order to unlock the first insert tool.

Abstract: A fastening flange in a power tool for accommodating a tool is provided with a noncircular cross-sectional geometry which has points which rise radially and which are designed in the shape of a circle segment. A connecting line between the centers of adjacent points which are in the shape of a circle segment intersects the outer contour, wherein a tangent to the point at the transition to the connecting contour section encloses an angle with the connecting line. An associated power tool assembly is also disclosed.

Abstract: The invention proposes a tool holder (1), in particular of the shrink-fit chuck type, the receiving section (5) of which comprises clamping means (9) which are provided centrally with respect to an axis of rotation (7) of the tool holder (1) for holding a shank (15) of a rotary tool, and which define a receiving opening (13) for the shank (15). The clamping means (9) can be displaced in the radial direction between a radially widened release position for insertion or removal of the shank (15) and a clamping position, in which the clamping means (9) exert radial press-fit forces, which hold the shank (15) in a frictional lock on its cylindrical outer circumferential surface (19), on the shank (15). The clamping means (9) are assigned a clamping surface (17) with a cylindrical contour which, in the clamping position, bears against the outer circumferential surface (19) of the shank (15) with surface-to-surface contact.

Abstract: A chuck for clamping an article has a receiving portion including a receiving bore having a longitudinal axis L, and a receiving bore inner surface. A clamping sleeve is accommodated in the receiving bore and is rotatable between a releasing position and a securing position. The clamping sleeve has a radially outwardly facing contoured clamping surface provided with one on more clamping segments, each clamping segment having a ramp between a trough and a crest, and a depression on the other side of the crest. Rotating the clamping sleeve within the receiving bore causes one or more rollers associated with each clamping segment to cooperate with the contoured clamping surface to effect the releasing and the securing of the article.