Abstract: Disclosed is a bushing (12) for guiding a rotating member such as a drill (10) into a workpiece (16). Scored in the interior wall of the bushing bore is a groove (18) in the form of a counterclockwise helix having size and slope characteristics that provide effective removal of the shavings or "chips" from the interior portion of the bushing bore as the drill cuts into the workpiece.

Abstract: Holes are cut in a metal workpiece by means of an annular cutter. The chips formed are broken and prevented from wrapping and accumulating around the cutter and its arbor by means of a chip breaker in the form of a lug or plate positioned generally radially to the cutter and extending into close proximity with the outer periphery of the cutter.

Abstract: This invention relates to the joining of two metal sheets such as in the repair of automobile body components. There is provided a tool which may be utilized to first form a dimple in one or more sheets, and then form a bore through the one or more sheets in alignment with the dimple so that the head of the fastener utilized to join the sheets may be recessed within the dimple and covered by a suitable filler material to provide a flush surface. The tool and the method of utilizing the same are particularly adaptable for securing together sheets utilizing conventional pop rivets.

Abstract: The apparatus includes a drill guide for use during the installation of locksets in doors. The guide has a body with preferably two recesses formed on the flat faces of opposite sides of the guide. One of the recesses has a flat base for straight-edged doors and the other has a sloped base for beveled-edged doors. An aperture extends through the body from recess to recess and is centered relative to the recesses so that the flat face serves as a guide for drilling pilot holes on the face of the door, while the recesses selectively serve as self-centerable guides for drilling pilot holes for either straight- or beveled-edged doors. A drift punch can be inserted into the edge pilot hole after the face hole has been made so that upon closing the door and urging the drift punch into the jamb, a mark will be made which is the center of the strike hole.

Abstract: A press-fit drill bushing for use in metal tooling plates has a circular cylindrical shank, and a toothed crown with an annular groove between the shank and the crown. The ends of the teeth adjacent the groove are disposed at an angle between zero and five degrees positive so that they form chips which are automatically packed into the groove as the bushing is pressed into a tooling plate.

Abstract: An adjustable template for locating drill hole positions primarily for cabinet doors and drawers. The template consists of a flat rectangular plate having spaced drill guide holes therethrough. The position of the plate with respect to the item to be drilled is established by way of a first elongated rod extending outwardly from one edge of the plate and a pair of spaced parallel rods extending outwardly from an adjacent edge of the plate, each rod having an adjustable edge guide movably mounted thereon.

Abstract: A door boring jig system for aligning a cross bore and edge hole in a door, including a pair of spaced clamping jaws; a bore hole in one clamping jaw locating the position of the cross bore; adjustment means for moving the clamping jaws toward and away from each other to adjust to the width of a door to be bored; a bushing mounting hole in the other clamping jaw aligned with the first bore hole; a split bushing having a flange at one end and a hinge at each end, each hinge including a pair of pins mounted in separate parts of the split bushing and a link pivotably mounted to both pins; each link being loosely fitted to at least one of the pins to enable the bushing parts to slide or translate as well as pivot or rotate relative to each other; guide means mounted between the clamping jaws remote from the first hole and bushing mounting hole and having an edge hole guide for defining the position of the edge hole; and edge bevel accommodator means including first and second mounting means carried by the guide m

Abstract: A drill is disclosed having a shroud structure extending about a chuck and drill bit at the forward end of the tool, to receive cuttings produced by the bit, and having a receptacle preferably carried at the rear end of the drill and to which the cuttings are withdrawn by a flow of air. In one form of the invention, the air movement is induced by aspirator action, while in another form a rotary air pump driven by the motor of the drill creates the suction effect. The receptacle may take the form of a cup detachably connectible to the body of the drill, and in the aspirator form of the invention the aspirating passages may be formed in an end wall of this cup. The shroud structure may include a sleeve disposed about the drill bit, and having a lug projecting inwardly to a position to contact and break up cuttings formed by the bit before they are withdrawn to the accumulation receptacle.

Abstract: A compact portable dowel hole spacing and drilling device has a rigid U-shaped base for receiving a workpiece to be drilled. Inner faces of the bright and a first leg of the base are flat and perpendicular to each other for facially receiving the workpiece which is clamped therein by a thumb-screw carried by a second leg opposite the first leg. A pair of standard drill guides are removably mounted in associated apertures in the bight of the base so that the longitudinal axes of the guides are parallel to each other and the face of the first leg.

Abstract: A drill bushing or similar article, such as a pump seal, having a hardened body of steel and a thin coating of tungsten carbide distributed throughout a matrix of nickel chrome which provides a metallurgical bond to the steel body and a metallic bond to the particles of tungsten carbide. The drill bushing or similar article will have the wear characteristic of the solid tungsten carbide article, but would retain the coefficient of expansion characteristic of steel with the steel body eliminating the brittleness experienced in solid tungsten carbide articles.

Abstract: An alignment bushing for twist drills or the like includes a uniform cylindrical guide member having a bore therethrough which guides the drill to the workpiece, and a holder for securing the guide member to a jig plate adjacent the workpiece, the guide member being removable from and reversibly positionable in the holder. After the inner diameter of the guide member has become worn at one end due to repeated use, the guide member may be removed from the holder and reversibly repositioned therein for subsequent twist drill aligning usage. The holder may be selectively positioned along the length of the guide member readily to adapt the bushing to variable spacing occurring between different jig plates and workpieces.

Abstract: A rotary tool assemblage includes an axially movable rotary tool and apparatus for holding a workpiece for engagement by the tool. A guide bushing is rotatably supported and interposed between the tool and the workpiece to guide and pilot the tool. The guide bushing and tool are rotationally interlocked to preclude relative rotational movement therebetween.

Abstract: Disk cutting apparatus embodying a pair of detachable clamping elements having flat surfaces facing each other for clamping a stack of sheets of material therebetween from which the disks are cut. At least one opening is provided through a clamping element and is of a size corresponding to the size of the disk to be cut. A cutter extends through the opening and has inner and outer cylindrical surfaces with the outer surface being of a size corresponding to the size of the opening. The inner surface at one end of the cutter is beveled to provide an outwardly flaring annular surface which terminates in an annular cutting edge.

Abstract: A high velocity, low-friction boring bar for boring holes through any machineable material. The boring bar comprises a cylindrical shaft having a boring head thereon rotatably and slidably disposed within a bearing member. The bearing member is surrounded by a housing which supports the boring bar as it extends through a hole-locating member.

Abstract: A boring bar has a free end that extends beyond the boring tool and has a guide roller rotatably mounted on the free end about an axis which is parallel to and offset from the boring bar axis. A guide bushing is supported in concentric alignment with the free end of the boring bar and rollably engages the guide roller at a point whose radius with respect to the boring bar axis extends in the same direction as the boring tool. The boring bar is preferably necked down between its supported end and the boring tool to facilitate deflection of the boring bar in response to pressure applied to the free end thereof by the guide roller and guide bushing.

Abstract: A liner bushing for tooling plates or jigs having longitudinally extending grooves, or slots, on the inner surface thereof.