Abstract: In an assembly for connecting an adapter shaft to a shaft in a force-fitting manner using a clamping ring, the clamping ring is mounted on the adapter shaft, the shaft is inserted into the adapter shaft, the clamping ring has a radially uninterrupted threaded bore, into which a screw part is screwed, in particular a threaded pin, which exerts pressure on the adapter shaft. A cylinder bolt is accommodated in a first, in particular radially directed, recess of the clamping ring, which projects radially inward into a second, in particular radially directed, recess introduced into the adapter shaft, in particular projects into it, especially in order to form a protection against loss and an anti-rotation protection acting in the axial direction and in the circumferential direction.

Abstract: A rotary cutting tool comprises a tool body having an axis of rotation (L) and a cylindrical shank, which comprises at least one locking groove via which the cutting tool can be axially locked in a tool holder. The locking groove has an axial groove, which extends from an axial end on the receiving side in axial direction (A) to an axial stop, and a circumferential groove, which is laterally adjacent to the axial groove and extends away from the axial stop and the axial groove in circumferential direction (U) toward a rotation stop. The circumferential groove comprises a first end face and a second end face opposite to said first end face, both of which extend in a plane that is perpendicular to the axis of rotation (L). A tool assembly having such a rotary cutting tool and a tool holder having a cylindrical tool receptacle for the cutting tool is provided as well.

Abstract: The invention relates to an interface between a collet holder and a tool adapter, said interface being simple in construction and in which the insertion of a tool adapter is possible in a simple manner even in confined spaces.

Abstract: A cutting tool assembly includes a tool body and a tool holder. The tool holder includes a cylindrical portion connected to the tool body, an eccentric drive member, and a fastener hole configured to receive a securing fastener. The eccentric drive member can include a trigon portion comprising a rounded triangular cross section.

Abstract: An assembly of a tool and a tool holder may include the tool, which may have an elongated body with a socket, and the tool holder, which may have a body with a first bore configured to receive at least a portion of the elongated body, and a second bore substantially transverse to the first bore. The assembly may also have an impinging member including a body having an end with a radial surface. In an assembled state, a portion of the elongated body of the tool may be positioned within the first bore of the body of the tool such that the socket and the second bore may be substantially aligned, and the body of the impinging member may be positioned within the second bore with the radial surface pressed against the elongated body in the socket at a predetermined torque.

Abstract: A drill assembly and method is provided for enlarging an injector of a reactor. The drill assembly includes an elongated shaft attached to a piloted drill bit including a pilot portion distal from and extending colinearly with the elongated shaft and a cutting portion proximal the elongated shaft and positioned between the pilot portion and the elongated shaft, wherein the cutting portion includes at least one cutting edge extending radially from a center axis of rotation beyond an outer surface of the pilot portion; and a drive device adapted to rotate the elongated shaft about the axis of rotation. The method includes inserting the pilot portion into an injector; and cutting away a portion of an inner surface of the injector with the cutting portion.

Abstract: A crosshead for a piston rod is provided, which comprises a main body having a first and a second seat. The first seat is configured to hold a connecting rod, and the second seat is configured to hold a piston rod. The main body is made as a single piece.

Abstract: Provided is a pressure pipe connection structure that reduces man-hours for machining one or more pressure pipes and does not require high machining precision. Multiple arc members form a ring shape that makes a circle by matching the end faces thereof to each other. Non-penetrating holes may be provided on the outer circumference of the arc members. The ring formed by the multiple arc members has an inner diameter that is smaller than the outer diameter and larger than the inner diameter of a pressure pipe. A cylindrical sleeve has an inner cylindrical surface inside which the entire outer circumferences of arc members are fitted into a hollow internal space, into which respective one or more pressure pipes are inserted from one or more opposing entrances; and multiple through holes, which penetrate from the outside and are provided with female thread ridges.

Abstract: A hole saw, including a rotatable drill bit, a plurality of rotatable saw jaws disposed around the drill bit to encase at least a portion of the drill bit therewithin when the rotatable saw jaws are in a closed position, a fixed locking collar portion disposed at base ends of the plurality of rotatable saw jaws, and a movable locking collar portion to move with respect to the fixed locking collar portion, such that the plurality of rotatable saw jaws pivot away from each other into an open position as the movable locking collar portion moves away from the fixed locking collar portion.

Abstract: A device for coupling and centering tools has a tubular portion with a coupling seat laterally delimited by a cylindrical centering surface, a first threaded hole with a first tightening dowel projecting into the coupling seat, a second threaded hole with a second tightening end projecting into the coupling seat, a third hole tangential to the centering surface and a locking pin removably lockable in the third hole in a position interfering with the coupling seat, and removable from the third hole to free the coupling seat.

Abstract: A quick connect/disconnect mechanism for a rotary bit having a central mounting hole at a proximal end includes a shaft extending axially and having a proximal end adapted to be releasably secured in a rotary tool and a distal end having a spud extending distally and axially therefrom. A plurality of retainer arms are arrayed about the axis and extending distally, each retainer arm including a catch extending radially outwardly from a distal end thereof. A release sleeve extends about the shaft adjacent to said distal end, the release sleeve having engagement keys to impinge on the proximal ends of the retainer arms, the sleeve being rotatable from a first position in which the engagement keys hold the retainer arms to secure the rotary bit to a second position in which the retainer arms rotate to release the rotary bit.

Abstract: Hydraulic expansion chuck with a basic body, with an expansion bush which is received in the basic body and defines a reception space for a tool to be clamped, and with a pressure chamber which is delimited between the expansion bush and the basic body. A securing pin extends through the basic body and the expansion bush into the reception space. Also broadly contemplated herein is a method for producing a hydraulic expansion chuck via: providing a basic body with a blind hole, into which an internal thread is cut. An expansion bush is then soldered into the basic body. Finally, an orifice is made at the bottom of the blind hole and extends through the material of the expansion bush into a tool reception space which is delimited in the expansion bush.

Abstract: A hole saw assembly having a drive shaft, drive disk and hole saw blade. The drive disk has a plurality of radially extending projections that engage with engagement slots in the side of the hole saw blade.

Abstract: A hydraulic expansion chuck includes a basic body, an expansion bush which is received in the basic body and defines a reception space for a tool to be clamped, and a pressure chamber which is delimited between the expansion bush and the basic body. A securing pin is provided, which extends through the basic body and the expansion bush into the reception space. A method for producing a hydraulic expansion chuck is disclosed. First, a basic body is provided with a blind hole, into which an internal thread is cut. Then, an expansion bush is soldered into the basic body. Finally, an orifice is made at the bottom of the blind hole and extends through the material of the expansion bush into a tool reception space which is delimited in the expansion bush.

Abstract: The application provides a screw threaded fastening component, which comprises a stud bolt having an external thread, a first connecting part into which a first screw threaded hole adaptive to the stud bolt is formed, and a second connecting part into which a second screw threaded hole adaptive to the stud bolt is formed, and a threaded direction of the second screw threaded hole is against the threaded direction of the first screw threaded hole. The first connecting part and the second connecting part are assembled on two ends of the stud bolt through the first screw threaded hole and the second screw threaded hole, respectively, and the first connecting part is engaged against the second connecting part when the stud bolt is rotated in a direction. The stud bolt is contained in the first screw threaded hole and the second screw threaded hole when the first connecting part and the second connecting part are engaged completely.

Abstract: A cutting tool including a body, a blade, a feed shaft, and a locking member. The body defines an axis and is adapted to be received by a spindle of a power tool. The blade is removably supportable on the body and rotatable about the axis for cutting a workpiece. A feed shaft is removably supportable in the body and rotatable about the axis for engaging a workpiece, the feed shaft being mountable in the cutting tool to engage and at least partially restrain the blade. The feed shaft further includes an opening transverse to the axis. The locking member is engageable with the body and with the opening in the feed shaft. Advancement of the locking member into the opening tightens both the blade and the feed shaft to the body.

Abstract: In a shank portion of an end mill which is chucked by a tool holder, flat surfaces are formed at a plurality of circumferential positions in the outer periphery of the shank portion so that the flat surfaces abut on side lock bolts attached to a body of the tool holder.

Abstract: A cabinet assembly bore indexing tool and method provides facilitated bore indexing and guided drilling, while an assembly method helps to make the tool almost foolproof while reducing overall cabinet construction time and raising cabinet quality. The tool uses approximate or nominal material thickness blocks referred to as drill bushing blocks and adjustable axial length spacer sleeves in a floating spacer assembly to locate the drilled bores at the nominal center of the horizontal members and correspondingly in the reciprocal location on the internal surface near the edge of the vertical members so that when assembled they go together in perfect alignment. The cabinet assembly bore indexing tool indexes from an edge or surface to ensure front exterior matching upon assembly of a resulting rectangular annular shaped member as the basic unit upon which cabinet construction is based.

Abstract: The invention relates to a tool for machining a workpiece, incorporating a holder having a locating opening arranged at the end face and a cutting head having at least one cutting element arranged on the workpiece-side end. Furthermore, the tool has a sleeve which is made substantially of carbide and which, with a first, holder-side end, is inserted in an accurately fitting manner into the locating opening of the holder, and the cutting head is arranged in or on the second, cutting-head-side end of said sleeve, and coupling means for coupling the holder, cutting head and sleeve.

Abstract: A cutter is for driven engagement with a driving device of an arbor. The cutter includes a shank portion having a central axis and extends along the central axis between a first end and a second end. A cutting portion extends from the first end of the shank portion. The shank portion defines an entry channel extending from the second end for guiding the driving device of the arbor during insertion of the shank portion into the arbor. The shank portion also defines a retaining channel extending from the entry channel for selectively retaining the driving device of the arbor. Each of the entry and retaining channels have a trough portion extending toward the central axis. The trough portions of each of the entry and retaining channels have a common configuration for slideably receiving the driving device.

Abstract: A cutter is for driven engagement with an arbor having one of an extending member and a pair of set screws. The cutter includes a shank portion having a central axis and a cutting portion extending from the shank portion along the central axis. A retaining recess is formed in the shank portion for selectively receiving the extending member of the arbor when the arbor is configured to have the driving device. A pair of flats are each formed in the shank portion for engaging the set screws when the arbor is configured to have the set screws. One of the flats extends in a first plane and the other of the flats extends in a second plane perpendicular to the first plane.

Abstract: The invention relates to a device for holding tools (13) on machine tools, comprising a tool receptacle (1) and a tool holder (6). Clamping elements (4) are used for fixing the two parts. According to the invention, the device is configured in such a way that both the tool holder (6) of a first type and the tool holder (6) of a second type can be adapted. The tool holders (6) of the first type meet the HSK standard while the tool holders (6) of the second type, for the purpose of shortening the length, do not have any receptacle (11) for a clamping system as it is required for tool holders (6) of the first type.

Abstract: The invention is a drill bit extender and method that enables holes to be formed or screws to be driven remote from a drill motor. It includes a drill adapter for attaching to a drill bit, hole saw, or spade bit, for example. The drill adapter accepts a threaded rod, such as a segment of rod that is threaded along its entire length, where the length of the rod determines the distance that a hole can be drilled remote from a drill motor. The rod is readily attachable and replaceable to enable an operator flexibility in drilling at various locations remote to a drill motor. The rod is attached to a drill motor by a drill motor adapter, which securely retains the rod in the drill motor adapter, enabling the drill motor to drive the remotely located drill bit efficiently.

Abstract: A thread tap adapter for use with a standard thread tap having a square profile driving end is disclosed. Specifically, the thread tap adapter may include an outer surface having a substantially hexagonal profile so that the adapter may be engaged with a wrench, and an inner surface having a substantially square profile so that the adapter engages the driving end of a standard thread tap. The adapter may additionally include means for securing the standard thread tap.

Abstract: An engraving tool holder for use in delicate engraving operations that provides fine tool length adjustment. The holder further provides adjustment of tool retention pressure. The holder has a bore that extends axially from the rear of the holder toward the front. Within this bore is an adjusting member that establishes the insertion depth of a tool. The tool holder has a tool receiving aperture formed axially and extending from the forward end. The receiving aperture has a substantially similar cross-sectional shape as the tool inserted into the holder. The holder has at least one retention member located adjacent to the forward end and perpendicularly engages the tool along the receiving aperture.

Abstract: A novel drill for the aerification of turf grasses is disclosed. The drill comprises a chuck and a fluted turf drill bit held by the chuck. The chuck includes a locking mechanism which permits the chuck to rotate freely about its longitudinal axis when loaded in compression (as when the drill is inserted into the ground) but which locks, preventing rotation, when the drill is loaded in tension (such as when the drill is withdrawn from the soil). The drill bit has a smooth upper section and a fluted lower section. The smooth section decreases the probability of entangling the turf in the drill bit with subsequent lifting of the turf when the drill is withdrawn. The tip of the drill bit is adapted to provide a torque to the drill bit during insertion into the ground. Thus, the bit spirals into the ground upon insertion, but locks upon removal, thereby permitting the flutes of the bit to cut a cylindrical hole in the ground while removing soil from the hole by retaining it in the space between the flutes.

Abstract: The present invention discloses a tool assembly being capable of reducing considerably an axial length of a working member (tool), in particular, a length of a male spigot to be coupled with a coupling member and transmitting a torque to a working member without generating a loss by means of a secure coupling between a male spigot of a working member (tool) having a short length and a coupling member. A tool assembly according to the present invention comprises a tool including a head to be approached to a work-piece, a male spigot extended from a rear end of the head and a flange formed at a border portion between the head and the male spigot and having a ring shaped flat rear surface; and a coupling member consisting of a first section having a cavity formed on a central portion of a front side thereof for receiving the male spigot and a second section formed at a rear side of the first section and connected to a driving means.

Abstract: The invention relates to a tool adapter which can be fixed to tool machines in a detachable and interchangeable manner, the tool machines being drilling and milling or similar cutting tool machines comprising at least one rotating work spindle. The tool machines are used to receive and position cutting tools, whereby the tool adapter (1) which is made of a spherical section (4) and a cylindrical band (3) is secured to a tool receiving element (2) and the tool receiving element (2) comprises, preferably, a central bore (5) for supplying a coolant. Opposite lying traversal bores (8, 9) which are used to receive clamping bolts (10, 11) are provided in the tool adapter (1) in a tool-sided cylindrical band (3) which is adjacent to the spherical section (4) the band being, preferably, diametrical and comprising a planar system arranged on a tool-sided receiving area and pointing to the tool receiving element (2).

Abstract: There is disclosed chuck configurations for internally engaging the hollow core element of a roll of packaging or printing sheet or other web material in which a generally cylindrical chuck body insertable in a web core has at least one hole through the chuck body at an acute angle with the tangent to the chuck body at the outer entrance point of the hole and at an acute angle with the plane perpendicular to the chuck cylindrical axis. At least one elongated element is configured to engage rotatably in each of the holes and having on a distal end thereof one or more pointed or toothed extensions for engagement with the interior of a hollow web whereby chuck engagement with a hollow core may be made by manipulating such elongated elements to extend outside the periphery of said chuck body. The chuck may also be provided with means for securing it on a spindle or shaft for rotation therewith which is separate and independent of the holes and elongated elements for engaging the hollow core.

Abstract: A tool holder is provided that is configured to deliver coolant to a work piece and/or a cutting tool. The tool holder includes a tool mounting aperture for receiving a shank of a cutting tool, and an axially extending central passage for receiving coolant deliver though a spindle of a machine tool. The tool holder additionally includes several coolant passages located around the tool mounting aperture for conveying the coolant from the central passage and distributing the coolant to the work piece and cutting tool. The coolant passages extend substantially parallel to the tool mounting aperture and are slightly radially spaced from the tool mounting aperture.

Abstract: The tool exhibits a first tool part (2) and a second tool part (3), which possess a common axis of rotation (A). The first tool part (2) is provided with an alignment pin (4) and exhibits at its root an annular surface (5). The second tool part (3) possesses an axial bore (7) to receive the alignment pin (4) and an annular surface (6), which is capable of being tensioned against the annular surface (5) of the first tool part (2). Tensioning structures (8, 9, 10) serve for the axial tensioning of the two tool parts (2, 3) to one another. The tensioning structures (8, 9, 10) exhibit three retaining screws (8, 9, 10) arranged distributed around the periphery of the second tool part (3), which retaining screws are each screwed radially into a threaded bore (12, 13, 14) of the second tool part (3) and each engage in a radial bore (21, 22, 23) of the alignment pin (4).

Abstract: The tool exhibits a first tool part (2) and a second tool part (3), which possess a common axis of rotation (A). The first tool part (2) is provided with an alignment pin (4) and exhibits at its root an annular surface (5). The second tool part (3) possesses an axial bore (7) to receive the alignment pin (4) and an annular surface (6), which is capable of being tensioned against the annular surface (5) of the first tool part (2). Tensioning means (8, 9, 10) serve for the axial tensioning of the two tool parts (2, 3) to one another. The tensioning means (8, 9, 10) exhibit three retaining screws (8, 9, 10) arranged distributed around the periphery of the second tool part (3), which retaining screws are each screwed radially into a threaded bore (12, 13, 14) of the second tool part (3) and each engage in a radial bore (21, 22, 23) of the alignment pin (4).

Abstract: An extension for a bit or cutter tool relative to a rotational power source. The extension includes a blind bore receiving the shank of the bit or cutter. The opposite end of the body has structure that can be operatively connected to the source of rotational power. A second bore through the side of the body intersects the first bore. The second bore has two portions. The inner-most portion has a smaller diameter and is internally threaded. The outer portion has a larger diameter and slidably receives a clamping member. Clamping member can be retained by a shoulder bolt and has an end that can enter into the blind bore to clamp the shank in place. Preferably the clamping member is a sleeve having a center bore and a concentric exterior. Another aspect of the invention includes a biasing means that biases the sleeve outward of the bore.

Abstract: A cutting tool has a shank with a cylindrical portion that is adapted to fit closely within a tool holder. The shank is adapted to be engaged by a setscrew of the tool holder at a first contact point. A clearance surface is provided opposite the first contact point. The clearance surface terminates adjacent two circumferentially spaced points that make contact with the tool holder upon tightening the setscrew. These contact points are circumferentially spaced from the first contact point angular distances greater than 90 degrees and less than 270 degrees.

Abstract: A tool for beveling the end of a pipe is comprised of a hollow, tubular body having a central, longitudinal axis of rotation, an inboard coupling end, and an opposite outboard working end. A plurality of longitudinally spaced, transversely directed latching pin bores of equal size are defined through the wall of the tubular body. A core member is disposed coaxially within the tubular body. The core member includes a beveling cutter head and a longitudinal stem having a radially inwardly directed, circumferential latch position groove. A transversely oriented latching pin is engaged in a selected one of the latching pin bores in the body and with the latch position groove of the core stem. This allows alternative selection of each of the latch position bores for insertion of the latching pin. The particular bore selected determines the longitudinal position of the core stem latch position groove within the body that will be aligned with the latching pin.

Abstract: A system for mounting a tool in a tool holder for high-precision centering of the tool and positive restraint of the tool from rotation within the holder. The tool holder includes a cylindrical aperture having a diameter slightly less than the diameter of the shank of a cylindrical tool. The tool is installed into the tool holder by heating the tool holder to a temperature sufficient to increase the aperture diameter sufficiently to accept the tool shank. The tool shank is further provided with an angular flat for engagement with a set screw to prevent the tool from being turned in the holder in use. Preferably, a second tool flat is provided opposite the first flat and extending to the end of the tool shank for orientation of the tool by a second set screw during insertion of the tool into the tool holder.

Abstract: The tensioning mechanism (18) comprises a clamp bolt (28), arranged in a displaceable manner in a transverse bore (26) in the fitting plug (12) and two diametrically opposed retainers (34, 36) in the second component (14) which engage with an axially facing internal or external cone against a complementary internal or external cone on the clamp bolt (28) and, during tensioning, are tensioned with the same in a wedge fashion. According to the invention, the clamp bolt (28) comprises a frustum-shaped external cone (40), the base diameter of which is smaller than the diameter of the guide surface (62) thereof in the transverse bore (26).

Abstract: A connecting device for gardening tool has a locking sleeve with a screw bolt and a tool head connector firmly secured in the locking sleeve by inserting the cubic part of the connector into the cubic portion of the locking sleeve and screwing the screw bolt on the locking sleeve. The connecting device allows gardening tool heads to be changed easily and conveniently to satisfy different requirements.

Abstract: A connecting device for gardening tool has a locking sleeve with a screw bolt and a tool head connector firmly secured in the locking sleeve by inserting the cubic part of the connector into the cubic portion of the locking sleeve and screwing the screw bolt on the locking sleeve. The connecting device allows gardening tool heads to be changed easily and conveniently to satisfy different requirements.

Abstract: An electrical discharge machining system including a fixture for the post which allows the post to be mounted and clamped thereto in a precise predetermined position thereon whether the post has a round cross-sectional configuration or a polygonal shape thereto. In a preferred form, the fixture includes a bore for a round shaped post having an indexing pin which seats in a groove formed in an upper surface of the fixture and is clamped therein by clamp members actuated by cam clamp operators. The clamping of the pin in the groove keeps the post rigid and stationary relative to the fixture to provide for improved results when the electrode is subject to machining operations. In addition, because the clamping mechanism herein does away with the previously-described hydraulic clamping device utilized with prior fixtures, there are no hydraulic lines or connections that have to be set up and maintained to provide an easier-to-use fixture for use with the tool holding system.

Abstract: A clamping device (1, 25, 35) for releasably clamping an insertion member (9, 27, 38) with a shank portion, the clamping device comprising a clamping member having an insertion bore (11, 26, 40) formed by the union of an access bore portion (19A, 31A, 41A) and a gripping bore portion (19B, 31B, 41B) for the free sliding insertion into and withdrawal from the shank portion in respect of the access bore portion and its clamping by a clamping surface of the gripping bore portion on its forced displacement thereinto from the access bore portion, the access and gripping bore portions having longitudinal axes (20A, 20B; 32A, 32B; 43A, 43B) spaced apart at least along a portion thereof.

Abstract: An end mill chucking structure for chucking an end mill having a relatively small diameter and used, for example, for deep milling of a die. The end mill chucking structure includes an end mill holder and an end mill. A holder body has a taper hole formed therein. The end mill includes an end mill body and a cutting tip provided at an end portion of the end mill body. A portion of the end mill body located opposite the cutting tip serves as a tapered shank portion. The shank portion and the rest of the end mill body are bounded by a shoulder extending outward from the surface of the shank portion. The shank portion is press-fitted or shrink-fitted into the taper hole such that the end face of the holder body abuts the shoulder of the end mill body, through application to the holder body of heat at a temperature lower than a conventional shrink-fitting temperature.

Abstract: A milling tool holder comprising an elongated body adapted to be supported on a milling tool base. The body has a shank-receiving bore. A tool head supports a pair of indexable inserts, and has a shank received in the shank receiving bore to a position in which an annular face on the head faces a similar face on the body. A pair of projections on the face of the body is received in a pair of openings in the tool head to prevent the tool head from rotating with respect to the body.

Abstract: A clamping mechanism for clamping a cutting head to an adaptor; the adaptor having a shank receiving bore and three forwardly slanted unthreaded through bores; the cutting head for clamping to the adaptor having a shank with three forwardly slanted threaded bores. The arrangement being such that with the shank inserted into the shank receiving bore the cutting head is clamped to the adaptor by three retaining screws which pass through the unthreaded through bores and are threadingly engaged by the threaded bores.

Abstract: A drill bit and a manufacturing method thereof that ensures integral mounting of a drill and a drill holder with a simplified construction and in a simplified manner are disclosed. The drill bit has a drill with a bit and a shank, and a drill holder formed with an axial insertion hole for fitting the shank. An engaging part is formed at a base end of the drill. A blind hole that intersects the insertion hole is formed in the drill holder to form a restricting part, or a stopper equivalent to the restricting part is fitted in the bottom of the blind hole. Engagement of a top of the stopper or the restricting part with the engaging part prevents a relative rotation of the drill to the drill holder.

Abstract: A mount for interposition between an electrode holder and an electrode for electrical discharge machining (EDM). The mount is cast from material such as aluminum or zinc. The mount has a shank portion that is connectable to the electrode holder and a connector portion or tip portion that is connectable to the electrode. The tip portion has a gluing surface that is dimensioned to be glued with a corresponding surface on the electrode. A plurality of deformable ears cast onto the gluing surface of the mount project outward and deform in contact with the electrode when the electrode and the mount are connected and bonded by glue, to thereby provide good electrical contact therebetween. The tip portion may also include grooves cast therein for receiving glue thereby improving the glue bond strength between the electrode and the mount. The mount includes an axial passage to provide for dielectric fluid flow therethrough.

Abstract: A device that adapts a wide range of appliances such as drills, awls, screwdrivers and sockets to use with a multifinctional pocket tool such as a pocket knife or other folding tool. The device firmly attaches the appliances to the multifunctional pocket tool so that the user can pull on the appliance in addition to pushing and turning. The adapter clamps firmly to flat blade such as a screwdriver blade by clamping to the blade with a screw and by forcing the sides of the adapter against the broad sides of the blade as well. The appliance is firmly retained by having a rigid thin rod or ball slide into the cavity in which the appliance is held to block its removal. The rigid thin rod or ball is easily moved out of the way to allow removal of the appliance.

Abstract: A chuck for rotary tools with a cylindrical chucking shank encloses such shank with a basic body. A radial through-hole in basic body serves to receive a clamping screw which applies pressure to a clamping member which is seated inside a through-hole between the clamping screw and chucking shank. A clamping member is provided with a radial projection and the through-hole with a cross-sectional narrowing along its inner end. In between the radial projection and the narrowing is an elastically compressible spring element which, due to its return force, lifts the clamping element away from the chucking shank and pushes it back into the through-hole when it is not under tension from the clamping screw.

Abstract: A method for gripping such objects as tool bits and other implements is an extension of principles employed by tool holders currently in use, which grip at one (primary) position along the shank length. This invention provides auxiliary gripping, or what I hereinafter call "back up gripping" at one or more positions in addition to the primary gripping position. A universal tool holder or handle is presented as one embodiment of the invention. The holder is an elongated cylindrical sleeve one end of which contains a gripping mechanism utilizing back up gripping. The other end of the holder allows for insertion of a strike rod which, when making contact internally with the gripped tool, transmits to the tool the impact of hammer blows made against the outer end of the rod. The gripping mechanism of the embodiment is comprised of two pairs of traversely adjustable screws which serve as jaws or grips. Each pair of jaws grips the shank in an orientation different from the gripping by the other pair.

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.