Abstract: The lug nut taper trueing tool includes a first disk which is positioned on one side of an automobile racing wheel and a second disk which is positioned on an opposite side of the wheel. The first disk has an extension sized to fit and extend within the center wheel hole of the automobile wheel. The first disk has a center bore, and a plurality of holes which are alignable with lug nut holes of the wheel. A bushing is positioned and secured within the plurality of holes of the first disk and has a flange which fits and extends within the lug nut holes of the wheel. The bushing has a bore for insertion of a pin, which is attached to a cutting tool. The second disk is attached to a threaded shaft, which is engagable with the first disk for securing the first disk, second disk, and wheel together. The cutting tool has at least one cutting edges and may have either a handle for a person to manually rotate the cutting tool or a shaft end for attachment to an automatic rotation device.

Abstract: A tool fixture device for positioning tools to repair defects adjacent to the sealing grooves in a pressure vessel head. The device includes a two pair of parallel, spaced apart, arcuate segments adapted to fit into one of the sealing grooves. A support plate is attached to the first and the second pair of parallel, spaced apart, arcuate segments. The fixture includes a plurality of threaded rods for expanding the ends of the parallel arcuate segments to engage the inside walls of one of the grooves to hold the fixture in place. In the preferred embodiment, a tool positioner is adapted to be attached to the support plate for positioning a repair tool to permit the repair tool to be used to repair defects adjacent to the sealing grooves. The tool positioner includes a planar table and a tool jig attached to the planar table for receiving the repair tool.

Abstract: Apparatus for cutting a hole through a plastic liner in a gas or other main comprises a body forming module of a train of modules adapted to travel through the main. The body has a radially movable platform carrying a cutter. The platform has four cams engaging four cams pivotally mounted on tie-bars. Advancing movement of the platform pushes the cams outwardly causing support legs to move outwardly and to cause four slave legs carried by the support legs to engage the plastic liner. Further advancing movement of the platform causes the cutter to engage the liner and also holds the support legs in their advanced position as noses on the cams traverse the faces of the cams.

Abstract: A drill jig for installing a lockset in a hanging door with an aperture for the lockset. The drill jig has a plate with a plug on one side dimensioned to fit into the aperture. An array of drill bushings is mounted in the plate aligned with a level on the top edge of the plate. Rubber feet protect the the door from being marred by the plate. The plate is positioned against the door in preparation for drilling holes through the drill bushing into the door.

Abstract: A pipeline and tubular structure renovation apparatus facilitates rapid and economical removal of protrusions into the interior of pipelines and other tubular structures, particularly gas pipelines having excess weld or devices such as nipples, etc. The apparatus consists of a generally cylindrical carriage mounted on wheels or skids which substantially center the apparatus within a pipeline; a clamping device to clamp the carriage in position; and a centrifugal tool head which may perform grinding, cleaning, polishing and other operations. Grinding may be accomplished in both radial and plunge cutting modes. The apparatus is robust and of simple and economical construction Weld removal speed is considerably faster than that achieved by conventional precision grinding tools.

Abstract: A circular hole cutting apparatus comprising a support frame, having a forward end, a rearward end, a lower end, and an upper end; the forward end forming a cutting bit mounting means, capable of rotatably retaining a cutting bit so that the upper end of the cutting bit may upwardly extend from the upper end of the support frame, and so that the lower end of such a cutting bit may downwardly extend from the lower end of the support frame; and the lower end of the support frame forming a radius arm mounting means, the radius arm mounting means being capable of adjustably retaining a radius arm, so that the rearward end of the radius arm may alternately extend rearwardly from the rearward end of the support frame and retract forwardly from positions rearward of the rearward end of the support frame.

Abstract: A compact coupling reaming apparatus and method for reaming coupling bolt holes of a rotor coupling. The apparatus includes a fixture plate for mounting the apparatus to the face of the coupling via a plurality of the coupling bolt holes. The apparatus also includes a drill axially slidably, radially slidably, and axially rotatably mounted to the fixture plate. During the reaming process, the drill is first aligned with the center of a first coupling bolt hole, the drill having a fixed distance from an axis of the rotor after being aligned with the center of the first coupling bolt hole. After reaming the first coupling bolt hole, the drill is aligned with a center of the holes and all other coupling bolt holes to be reamed by axially rotating the drill to the center of the second coupling bolt hole while maintaining the fixed distance of the drill from the axis of the rotor.

Abstract: A hole tool guide assembly (10) for use with a hole saw (20) includes a conically shaped core member (12) with a central longitudinal aperture (24) and an offset parallel aperture (32) to receive a pilot of a hole saw. A coil spring (18) biases the member (12)--against a work piece within an existing hole (62) to resize and reposition a new hole (67) through the work piece (60).

Abstract: A carpenter's locator for use with a door boring jig, each of which have a straight side that can fit together, the locator thereby locating the boring jig the proper distance from the doorknob hole for boring a security lock or deadbolt lock hole is disclosed.

Abstract: A tube cutter tool is insertable into a tube for cutting a coupon from a damaged site on the exterior of the tube. Prior to using the tool, the damaged site is first located from the interior of the tube using a multi-coil pancake eddy current test probe. The damaged site is then marked. A fiber optic probe is used to monitor the subsequent cutting procedure which is performed using a hole saw mounted on the tube cutter tool. Prior to completion of the cutting procedure, a drill in the center of the hole saw is drilled into the coupon to hold it in place.

Abstract: An extension arm 23 for a multiple hole drilling device 1, the drilling device 1 comprising a frame 17 having a first surface 19 for abutting a workpiece and drive means 3,9,11 for plunging a row of rotating drill bits 7,13 through the first surface 19 into the workpiece, the extension arm 23 comprising a body 25, adapted for attachment to the frame 17 of the drilling device 1, defining a slit 27 colinear with the row of drill bits 7,13, and a protrusion 33,31,35 accommodated within the slit 27 for engaging a drill hole formed in a workpiece, wherein the protrusion 33,31,35 is lockable to the body 25 of the extension arm 23 such that additional drill holes can be formed in the workpiece at repeatable distances along the workpiece. By enabling controlled positioning of groups of drill holes to be achieved, dowel joints requiring corresponding drill holes in two workpieces can be simply, easily and accurately produced.

Abstract: An installation method for security switches located in door jambs and connection into security system wiring is provided together with a mounting fixture for simplifying the installation. To avoid wall damage, with cylindrically packaged security switches inserted snugly in a hole drilled part way through a door jamb a few inches from the floor, an installation fixture holding a drill at an angle is inserted into the switch mounting hole for drilling at a desired angle a system wire passageway hole into the switch mounting hole wall to extending downwardly through the floor. Another drill held in the fixture at a different angle permits routing of the mounting hole wall form a wire transit channel axially adjacent to an inserted switch for passing the system wires back to connect with the security switch.

Abstract: A member is disposed against a motor vehicle wheel at a position near the center of a bore for receiving the wheel axle. The member may be a collet expansible radially against the annular wall defining the central bore. Alternatively, a ring may be moved into concentric relationship with the central bore and then disposed against the back side of the wheel. Clamping members are then moved, preferably axially and rotationally, against the wheel front side at a position near the wheel periphery. A snubber ring is thereafter moved against the wheel back side, preferably at a position corresponding radially to the positions of the clamping members against the wheel. Each member at the wheel periphery may be moved by introducing hydraulic fluid into an individual one of a plurality of cylinders to move a piston coupled to such member.

Abstract: Apparatus for machining the annular valve seats of a gate valve has a cradle which slides on and wedges outward against the confronting gate guide rails in the valve chamber to lock the cradle in place between the valve seats. A large gear is mounted on one side of the cradle for rotation by a hydraulic motor about an axis generally aligned with the axis of the facing valve seat through adjustment of a pair of leveling screws. A carriage is driven axially on guide rods projecting from the gear adjacent the periphery thereof by a servo motor mounted in the plane of the gear. A tool carrier is reciprocated radially on slides on the carriage by a lead screw motor mounted on the carriage. When machining of one valve face is completed, the cradle is unlocked, lifted off the guide rails, rotated 180.degree. about a vertical axis and reinstalled on the guide rails for machining of the other valve seat.

Abstract: A work holder is provided for modifying an automatic transmission such that clutch pistons within the automatic transmission receive a unidirectional valve therethrough rather than the associated clutch drum as is typically the case. The work holder includes a base with a horizontal upper surface having a central disk which is sized to fit and retain one clutch piston to the base when the central disk is in one orientation and another clutch piston when the central disk is in another orientation. With the clutch piston securely attached to the work holder, a drill bit guide mounted on the work holder directs a stepped drill bit so that it may bore a hole through the clutch piston for passage of hydraulic fluid therethrough. Two drill bit guides are provided, one for each clutch piston, which each direct one of two of the drill bits to the appropriate location. Once the holes are drilled in each clutch piston a check ball and seat combination are located within each hole thus made.

Abstract: An index-locator pin passes through an aligned hole formed through a drill plate and juxtaposed pack-up and is displaced by a power fastener tool. A gauge pin is transversely positioned within the index-locator pin and pushes the pack-up against a drill plate in response to displacement of the index-locator pin. By maintaining the drill plate in clamping relationship against a multi-layer pack-up, a hole pattern in the drill plate may be replicated in the pack-up with high precision.

Abstract: An in line drilling device for boring holes an equal distance from one another in wood, plastic or metal, comprising a set of geared together shafts equipped with drilling bits. The bit holder shafts are guided by bearings housed in a frame biased upwardly by springs. The fully compressed springs act to limit the extent of projection of the drill bits into a workpiece.

Abstract: An improved support mechanism for supporting a boring bar at spaced locations along its length within a workpiece during a boring operation, the present support mechanism being particularly adaptable for precision in-line boring of the cam shaft bores associated with overhead cam cylinder heads such as the Ford Escort overhead cylinder head presently in use and being specifically directed to centrally supporting the boring bar intermediate the respective opposite end portions of the cylinder head or other workpiece, the present support mechanism including a first annular member slidably positionable on the boring bar at an intermediate location along its length, the annular member being constructed to enable the boring bar to rotate freely therein, a second member slidably positionable within any one of the lifter bores associated with the particular cylinder head or other workpiece to be re-bored, the second member including a locking mechanism for locking the second member within any one of the lifter bores

Abstract: An template positioning jig. In a preferred embodiment, a deformable member is used which is deformed inwardly along a first axis such that it bulges or otherwise deforms outwardly along a second axis, until contacting the sides of a cavity, whereupon it tends to center itself within the cavity. An operably associated template is likewise centered or otherwise positioned as desired relative to the cavity.

Abstract: A hand-held automatic drilling machine includes an expandable locating collet or locating pin, a pair of adjustably mounted drill bits for simultaneously drilling a pair of spaced-apart openings in a workpiece and a rotary drive motor for the drill bits. The machine also includes a first drive assembly for activating the expandable collet and a second drive assembly for advancing the drill bits into the workpiece. An adjustable dashpot provides resistance to the second drive assembly, thereby controlling the force applied to the drill bits and thus the feed rate. A bi-stable control valve commences the drilling cycle in one state and sequentially activates the first drive assembly and the second drive assembly. A full depth sensor moves the control valve to the opposite state, sequentially deactivating the second drive assembly and the first drive assembly.

Abstract: A pin locator device for use in positioning a drill relative to an already drilled hole in a workpiece for the purpose of drilling a line of equally interspaced holes in the workpiece is in the form of a spring plunger which can be depressed into the already drilled hole and released when the workpiece is properly situated for the next drilling operation.

Abstract: A portable system for reworking the inside diameter of oil field pipe and casing, and especially plastic coated pipe that is to be re-coated. The system includes a grinderhead that removes irregularities from the inner surface of the pipe to render the pipe suitable for use in deep wells. A cutterhead assembly is rotated as it is forced into the interior of a joint of pipe. The cutterhead assembly includes a mandrel which turns a special cutting device having a plurality of grinders for engaging and cutting the inner wall of the pipe as the entire grinderhead is forced to travel through the pipe. Alignment and grinding members attached to the mandrel maintain the longitudinal axis of the grinders in proper alignment to produce the desired new pipe inside diameter. Included in the system is a special cutterhead for removing old plastic coating material in advance of the grinderhead whereby the cutterhead mostly removes plastic while the grinderhead mostly removes metal from the inner pipe surface.

Abstract: A stringer clip end effector (21) suitable for use with a computer-controlled (CC) machine tool is disclosed. The stringer clip end effector (21) includes a pair of jaws (45,47) for picking up a clip (23) at a presentation location. After being moved by the CC machine tool to an insertion location adjacent to a hat-shaped stringer (31), a pair of cams (60a, 60b) located on opposite sides of the clip (23) are extended into the stringer cavity (25) and rotated to spread the stringer walls (27,29). Thereafter, the clip (23) is positioned in the stringer cavity (25). Then, the cams (60a, 60b) are rotated to a nonspread position, and clamp elements (49a, 49b, 51a, 51b) are actuated to press the walls (27, 29) of the stringer (31) against the clip (23). Next, drill bits (57a, 57b, 59a, 59b) that face the outer surface of the stringer walls (27, 29) are energized and moved toward the stringer walls. After holes are drilled through the stringer walls and the clip, the drill bits are withdrawn.

Abstract: A tool for finishing the aperture in the base of a cartridge case. The typical cartridge case has a cylindrical neck and the aperture is located on the axis that extends from the cylindrical neck. A pilot is provided on the shank of an aperture cutting tool coaxial with a cutter on the tool. A limit stop is provided above the pilot and the combination is adjustable and lockable at a desired position on the shank. The combination pilot and limit stop is positioned relative to the cutter so that as the pilot enters the neck, the cutter is guided into the aperture. The stop limit provides the exact amount of cutter entry for removing burrs but without enlarging the aperture.

Abstract: An attachment for clamping a portable drill to a work piece includes a foot member which positions a portable drill with respect to a work piece. A contact pad applies pressure to the surface of the work piece. Located between the contact pad and the means for engagement of the portable drill is a guide path in which a housing is slidably mounted. Affixed to the housing is a means for applying a vertical force and a collet member. Said means being anti-back drivable. The vertical force is applied to a mandrel so that the mandrel expands the collet. Once the collet has been expanded, a force is placed on the contact pad and on the means for engaging the portable drill. Consequently, the portable drill is held in place at the desired location for drilling a finish hole using minimal force.

Abstract: A method and an apparatus for conducting predetermined operations in the interior of a pipe with a cutter, in which the cutter is shifted so that a rotary axis of the cutter is angularly displaced about an axis extending along the pipe and is displaced in the axial direction of the pipe while the cutter is rotated about an axis extending in the axial direction of the pipe or about an axis extending in the radial direction of the pipe.

Abstract: A method for repairing cylinder head bolt holes including removing the cyder head from the damaged cylinder bore and removing an adjacent cylinder head from its adjacent cylinder bore. A drill base support is installed in the adjacent cylinder bore and drilling platform studs are installed at locations corresponding to the drill base stud holes. A drill base and a jig are installed and a drill press is used to drill and remove broken bolts. The inside diameter of the damaged bolt hole is measured and studs are installed in the block with adhesive applied to the threads of the studs.

Abstract: A universal tool for inspecting and processing plastic pipe includes a cylindrical chamfering element with a cylindrical wall and a pipe-receiving opening therein terminating in a base ring, the base ring carrying a tapered pin having an axis parallel to the axis of the cylindrical chamfering element, the wall of the chamfering element having a slot therein proximate the tapered pin and a four-edged cutting element mounted on the outer surface of the cylindrical wall and having one edge of the cutting element protruding through the slot in proximity to the tapered pin, the pipe to be chamfered being forced into contact with the cutting edge by axial pressure on the chamfering element and rotation thereof, an ovality-gage being carried by the chamfering element and being arcuatley rotatable, at the end of the arc rotation of the gage causing rotational forces to be applied to the chamfering element, i.e., the ovality-gage acting as a handle for the chamfering element.

Abstract: A hand tool for the preparation of an off-set bore relative to a countersunk recess in a structural plate member wherein a pilot sleeve with a central bore slidably support an upper hollow sleeve that is spring biased away from the pilot sleeve. A bushing secured to the upper portion of said hollow sleeve also retains a drill bit that extends in to the pilot sleeve while the shank end is connectable to a drill for rotation and axial movement with the hollow sleeve relative to the pilot sleeve to drill a through bore in the plate member whose axis is off-set relative to a tapered countersunk conical recess in the plate member. The lower end of the pilot sleeve has a tapered annular surface or conical recess whose central axis is off-set relative to the axis of the central bore of said pilot sleeve, and a handle is secured to the pilot sleeve to position and hold the hand tool in the countersunk recess of the plate member as it is drilled.

Abstract: A mechanical drilling aid serves for guiding a drilling tool (42) when drilling a bore into an object, in particular into a wall (39), eccentrically to an existing faulty bore (20), when the cross-sections of the faulty bore (20) and the correct bore intersect each other or extend immediately adjacent each other. In order to ensure simple and exact guiding of the drill during the drilling operation, the mechanical drilling aid comprises a guide element (14) provided with a cylindrical opening (25) for guiding the drilling tool (42).

Abstract: A drilling machine for drilling holes in the ends of rails for a railway track to receive fishplate bolts, has a base 12 on which is provided a former 20 adapted to the profile of the rail 10. A clamping jaw 18 is connected by a clamping mechanism 16 for clamping the base 12 to the rail. An electric drill 20 is slidably supported on a column 14 on the base 12. An annular hole cutter 26 on the drill spindle 24 drills a hole through the web 40 of the rail 10. The former 30 accurately locates the drilling axis laterally with respect to the rail 10 and a respective end of the former 30 can be aligned with the rail end when clamping the machine to the rail in order that the drill axis will be accurately located longitudinally of the rail.

Abstract: A mechanical drilling aid serves for guiding a drilling tool (42) when drilling a bore into an object, in particular into a wall (39), eccentrically to an existing faulty bore (20), when the cross-sections of the faulty bore (20) and the correct bore intersect each other or extend immediately adjacent each other. In order to ensure simple and exact guiding of the drill during the drilling operation, the mechanical drilling aid comprises a guide element (14) provided with a cylindrical opening (25) for guiding the drilling tool (42).

Abstract: An apparatus for countersinking rivet holes preformed at circumferential spacings in the fuselage of an airplane and in annular reinforcing ribs of H-shaped cross section in the fuselage at axial spacings. Included is a carrier arm cantilevered to a frame for insertion in the fuselage and reinforcing ribs. The carrier arm has a fluid-actuated cylinder and a fluid motor. The cylinder has a piston rod to which is coupled an offset anvil assembly for pressing the fuselage and a rib against a toolhead mounted to the frame. The piston rod, together with the anvil assembly thereon, is not only linearly displaceable but also rotatable about its own axis. The fluid motor actuates the piston rod for revolving the anvil assembly through an angle of at least 180 degrees. With such angular displacement of the anvil assembly, the apparatus is readily adaptable for countersinking two annular rows of rivet holes formed in those parts of the outer flange of each rib which are on the opposite sides of its web.

Abstract: A drill spindle (62) is carried by the forward end of an elongated gear housing (12, 14). A parallel drive shaft (84) is carried by the housing (12, 14) rearwardly of the spindle (62). A parallel lead screw (92) is positioned between the spindle (62) and drive shaft (84) and is attached to a workpiece-engaging foot (20). A plurality of gears transmit rotation of the drive shaft (84) to the spindle (62) and lead screw (92). Two leader pins (182) are attached to the foot (20) and engaged by bearings (186) carried by the housing (12, 14) to slide freely relative thereto and to provide stiffness between the housing (12, 14) and the foot (20). The leader pins are spaced laterally and rearwardly from the drive shaft (84). A fluid activated pusher member (30) cooperates with the foot (20) to wedge the forward end of the drill (10) in a recessed work area. A fluid operated dog clutch (124, 132) engages rotation of the lead screw (92).

Abstract: Valve seats are machined at the end of an axially deep, narrow cavity of a workpiece having an axially clampable surface within the cavity adjacent one or more valve seats. The method comprehends: (a) supporting a rotary driven spindle assembly of sufficient length to extend through the axial extent of the cavity and reach the valve seat, the spindle carrying a cutting tool at its extremity, the support being in a nonrotatable housing effective to fit closely to the interior of the cavity (within a tolerance of 0.

Abstract: Valve seats are machined at the end of an axially deep, narrow cavity of a workpiece having an axially clampable surface within the cavity adjacent one or more valve seats. The method comprehends: (a) supporting a rotary driven spindle assembly of sufficient length to extend through the axial extent of the cavity and reach the valve seat, the spindle carrying a cutting tool at its extremity, the support being in a nonrotatable housing effective to fit closely to the interior of the cavity (within a tolerance of 0.

Abstract: Apparatus for machining splines on the internal surface of a tubular member comprising cutter means for forming the splines on the internal surface; a carrier for the tubular member for enabling the tubular member to be moved in an axial direction relative to the cutter means; and means for angularly indexing the cutter means relative to the tubular member whereby splines at angularly predetermined intervals can be provided around the interval circumference of the tubular member.

Abstract: An apparatus for punching a plurality of predetermined spaced mounting holes in a building roof panel support member includes an elongated housing having an oil sump therewithin, a hydraulic pump together with an electric motor for actuation thereof mounted on the housing, guide structure which can be opened and closed for temporarily mounting the housing upon a roof panel support member, an adjustable gauge pin mounted on the housing near one end thereof, the gauge pin being supported on a mount which is adjustable along both the length and the width of the housing, and a hydraulic punch adjustably mounted near the other end of the housing from the gauge pin for punching holes in the support member.The method of punching holes in a roof panel support member as disclosed herein is also part of this invention.

Abstract: A tool for removing material from a body about the circumference of an aperture through the body. The tool includes guide structure for fitting into the aperture, the guide structure having a major axis which is maintained in alignment with the longitudinal axis of the aperture when the guide structure is fitted into the aperture; includes a cutting assembly for selectively cutting material from the body about the circumference of the aperture; and includes attachment structure attaching the cutting assembly to the guide structure for arranging the cutting assembly at a specific location relative to the longitudinal of the guide structure.

Abstract: The fixture, in a first embodiment of the invention, comprises a flat base having a plurality of mounting holes formed therein, and a platform supported above the base, by a plurality of legs integral with both the base and platform. The base and platform are in parallel planes, and the platform has a guide bushing slidably engaged with an aperture formed in the platform. A lock screw, threaded into a tapped hole formed in the platform adjustably secures the bush in place. Plugs engageable with tubes in the tubesheet are passed into the mounting holes in the base to fix the base securely to the tubesheet, and the bushing receives therein a drill for drilling out a tube, in the tubesheet, which is directly aligned with the bushing. The bushing has an arcuate cut-out formed therein to accommodate the withdrawal of the bushing from the platform, without having to release the plugs, and its replacement by another bushing to facilitate reaming of the tubesheet.

Abstract: A multispindle-drilling machine for drilling series of holes, in particular in parts of pieces of furniture, includes a drilling head, carrying drilling spindles. Two positioning pins are mounted on the head for displacement relative thereto in directions axially of the pins. The pins are fixable at upper and lower positions relative to the head. The pins are displaced relative to the head and are held by automatic catches upon completion of a drilling operation.

Abstract: An adjustable drillhead suitable for mounting on a dual bit drill gun or press is disclosed. The invention allows for variation of the spacing between two drill bits and is especially suited for use in drilling dual holes through a workpiece required for nutplates. Also disclosed are means to locate the drillhead relative to a specific location on a workpiece prior to drilling the dual holes.

Abstract: A portable boring machine for boring bearing housings in situ includes a pair of spaced apart mounting members for adjustably positioning a boring bar within a row of bearing housings. The spaced apart mounting members are removably positionable on the boring bar and permit rotation of the boring bar with respect to the housings. The mounting members include radially adjustable jaws which enable the space between the boring bar and an adjacent bearing housing to be adjusted by the user in order to adjust the position of the boring bar within the housing and to vary the inclination of the boring bar with respect to the row of housings to be reconditioned. In this way the user has complete control between the relative positions of the boring bar and the bedplate. Moreover, since the support members are removably positionable on the boring bar they may be adjusted in position with respect to the particular housing to be bored.

Abstract: A device (10) is provided that is operative for purposes of accomplishing the drilling, boring and tapping of a relatively large size opening (106) in a body (17) while the latter is located in a hostile environment. The subject device (10) is characterized both in that it is portable and in that the boring and tapping functions are combined into the same device (10). The subject device (10) includes fixture means (18) for effecting the alignment of the device (10) relative to the opening (106) that is to be bored and tapped, support means (14) having a surface supported thereon in juxtaposed relation thereto, first operating means (16) supported on the aforesaid surface for movement relative thereto in a predetermined direction, and second operating means (104) cooperatively associated with the first operating means (16) for movement therewith and operative for purposes of performing certain machining operations.

Abstract: A hole saw guide positions a hole saw while forming a new hole either partially overlapping or surrounding an existing hole in a work piece. The hole saw guide includes a disc-shaped body having a pilot drill guide hole through the center sized to guide the pilot drill of a conventional hole saw. Two or more guide arms extend radially outwardly from the body and have outer ends which engage the inner circumference of an existing hole in the work piece to secure the guide at a desired position. The guide arms are adjustable in length radially so the pilot drill guide hole in the body can be positioned where desired. The pilot drill of a conventional hole saw is then inserted into the pilot drill guide hole which properly centers the hole saw so that the new hole formed in the work piece is properly located.

Abstract: A reboring tool has a two-piece carrier for a separable cutter with several cutting edges. The front shank of the carrier is threadedly connected with the rear shank which has one axial passage for admission of coolant to the range of the cutting edges. The cutter is rotatable and axially movable in rear guiding sleeve in the retracted position of the tool. The front shank of the carrier is rotatable in a front guiding sleeve, and the workpiece is placed between the two sleeves so that the front shank extends through its bore prior to start of the bore enlargement operation. The distance between the cutter and the front end of the front shank of the carrier exceeds the length of the bore in the workpiece.

Abstract: A support frame having a face which may be positioned against a workpiece. A cutting arm is mounted for rotation relative to the axis of the frame in such a manner as to support a cutting tool which may be used to form a groove in a workpiece, such as a cylinder head. The cutting arm is supported in a rotating unit such that the depth of the tool and the radius of the groove may be precisely controlled. A crank is attached to the turning unit for positive rotation of the cutting tool. A plurality of locating, headed pins are mounted in the frame so that the heads are biased to positions beyond the workpiece-contact face of the frame. In the exemplary use of the tool to form a groove in a cylinder head, the pins may be precisely positioned so as to cooperate with stud bolt holes in the cylinder head in order to precisely locate the axis of the turning unit relative to the cylinder head.

Abstract: The collet-type drill includes improved clamping means having a pressure foot member that is in engagement with the work piece. The pressure foot member is connected with a drill motor and with a feed means. A collet is operably connected to and movable relative to the foot member, and when actuated, connects the drill to the work piece. A clamp bushing has one end pivotally connected with the collet and encircles a cylindrical sleeve that has a transverse slot extending therethrough. The bushing is connected to the pressure foot member. A clamping piston extends through the sleeve and carries a connecting pin that extends through the slot in the sleeve into the clamp bushing whereby the bushing and collet are movable together in response to movement of the clamping piston to force the collet into holding engagement with the work piece.

Abstract: Pin bores of excavator forebooms are subjected to impact and side loading, causing wear which eventually leads to wobble of the foreboom. The close tolerance required in reboring such bores has previously necessitated transporting the foreboom to repair shops with large machine tools and jigging capacity for such massive structures. The present invention provides a fixture embodiment (30) adapted to rebore a workpiece (10), such as a foreboom, to within close tolerances in conjunction with an easily portable powered drill or the like. Reboring operations may be performed at any convenient site. Fixture embodiment (30) comprises a guide member (32), a structure (40) for holding the guide member (32) to the workpiece (10) in a precisely positioned relationship, a boring bar (52) and a supporting and aligning structure (70). A method for reboring the workpiece (10) is also disclosed.

Abstract: A pilot assembly as for locating a workpiece in successive forming stages of a machine, such as a punch press, where the workpiece is progressively moved through the forming stages of the machine. The pilot assembly includes a pilot pin mounted to a movable die member of the machine for guiding entry into a previously formed hole in a workpiece or in a companion die member as the die members are moved toward each other, the pin being axially retractable in its mounting in the event it strikes an obstruction.