Abstract: A drill head which enhances the accuracy of a drill, is attachable thereto and which includes an inner cylinder which is retractable into an outer cylinder and means to adjust such retractable distance, which distance is determinative of the exact depth of the hole to be drilled.

Abstract: Disclosed is a quick-change nosepiece (10) for a power drill (27) capable of telescoping by very small increments in the longitudinal direction, of angular or rotational displacement, and of quick and easy engagement and disengagement so as to provide access to the drill bit (29). Alternatively, a nosepiece (10) may be changed with one of greater or lesser length to correspond to the length of the drill bit (29) as the bit is changed.

Abstract: An improved bit-like device for proper removal of spot weld interconnections of upper and lower flat members, such as in sheet metal operations. The device includes an outer member sleeved over a bit shank, rotational and slidable connection structure between the outer member and the shank, a spring biasing the outer member to a non-work position, and stop members, preferably adjustable, to limit the relative axial movement of the outer member with respect to the shank and thereby limit the depth of metal removal.

Abstract: A drill stop apparatus for use with an elongated drill bit is provided. The drill bit has a drilling end that is used to drill a hole of a specified, predetermined depth. The bit also has a plurality of circumferentially extending, axially spaced grooves formed on its outer surface. The drill stop includes a body having a first end and formed to include an axially extending bore that is sized to receive the drill bit to permit the bit to be moved axially within the body. The body also has a cavity that extends substantially perpendicularly through the bore. A plunger is provided that is sized to be received in the cavity for releasably engaging one of the plurality of grooves in the drill bit to lock the drill bit against axial movement within the body member such that a specified length of the drill bit extends beyond the first end of the body member.

Abstract: A drill jig for making a channel in a timber for containing flowable preservative comprises a body (10) having a first or perpendicular guide bore (20), a second or oblique guide bore (22) and a third or vertical guide bore (24). The guide bores (22) and (24) intersect in a cylindrical locating spigot (18) and the axes of the guide bores (20) and (22) intersect in the timber to be drilled. A collet (26) on the shank of the drill bit (28) limits the depth of penetration by the lower face (32) of the collet abutting an abutment face (34) on the body (10). The depth of pentration when using the guide bore (20) or (24) is limited by the collet (26) coming into abutment with an adjustable stop (38) on the body (10). No adjustments are necessary as between drilling perpendicular or oblique bores and it is ensured that the bores formed in the timber intersect to form a continuous channel for receiving flowable preservative.

Abstract: A pipe shaver having an elongated mandrel and a plurality of cutting tools is used to shave the outer surface of a predetermined length of a pipe. The mandrel is secured to a cup-shaped body having a plurality of lugs for carrying circular cutting tools. The mandrel and body are separated from each other to provide an annular space for accommodating the shaved end of the pipe. A power unit having an electric motor is used to rotate the shaver.

Abstract: A depth-adjusting system for a power tool includes a housing nose portion on which is snapped a two-piece, molded plastic depth-adjusting subassembly. Each member of the subassembly engages a respective area of the nose portion. An adjustment member is rotatably connected to the nose portion, but is releasably restrained from axial movement upon engagement with a split-ring detent on the nose portion. A locator member is threadably connected inside the adjustment member, but is restained from rotating through the interaction of integral keys formed on its interior cylindrical surface with mating longitudinal keyways formed on the nose portion. Thus when the operator rotates the adjustment member, the locator member is forced to move axially forwardly or rearwardly, depending upon the direction of rotation of the adjustment member.

Abstract: A tool for trimming coaxial cable comprises a cable-holding member and a cutter-holding member. Sections of the cable-holding member and cutter-holding member are matable for movement relative to each other and they are initially secured together so that stop surfaces of these members are spaced from one another based on the amount of trimming that must be done to trim a cable to a precise electrical length. The end of the cable is secured in the cable-holding member with the end to be trimmed disposed against a cutter member secured to the cutter-holding member. The matable sections are unsecured, the cutter-holding member is rotated relative to the cable-holding member so that the cutter member trims the cable end until the stop surfaces engage.

Abstract: A hand-held device for driving screws into a receiving member or material includes a housing and an axially extending depth stop mounted on the front end of the housing. The depth stop is adjusted in the axial direction relative to the housing by an actuating sleeve which encircles a part of the depth stop and of the housing. The sleeve is connected to the depth stop by a pin and is axially movable between a first position where it is fixed to the housing and a second position where it is rotatable relative to the housing. Catch elements on the actuating sleeve and the housing hold the actuating sleeve in the first position. In the first position the pin fixes the actuating sleeve against rotation relative to the housing.

Abstract: A drilling device for removing a spot-welded portion includes a main body casing having a chuck receiving holder, a U-shaped arm one an end of which is connected to a side portion of the chuck receiving holder, a grip handle pivotally connected to a base shoulder portion of the U-shaped arm, a chuck thrusting arm mounted integrally at an end of the grip handle, and a chuck having a drill fixed thereof, the drill facing a free end of the U-shaped arm, and a chuck receiver for receiving the chuck and slidably inserted into the main body casing. The chuck is rotated and projected in the direction toward the free end of the U-shaped arm by movement of the chuck receiver upon depression of the grip handle, the force of which is transmitted via the chuck thrusting arm. The drilling device further includes a projection amount adjusting screw for adjusting the amount of projection of the chuck.

Abstract: An improved dental burr and method of preparing a tooth for a porcelain to metal restoration. The method comprises the forming of a test trough of a precise depth in the tooth enamel across a tooth and removing the necessary enamel from the rest of the tooth to a corresponding depth so as to provide the space necessary to accommodate the required thickness of the porcelain restoration. To secure the desired optimum depth, a dental burr is provided with a stop flange to limit the depth of the cut or trough. In one embodiment the stop flange is rendered detachable connected to the burr so as to render the burr useful for other procedures.

Abstract: A cutting or drilling apparatus comprises a body member adapted to be fixed to the chuck of a driving means for driving the apparatus into rotational movement. The body member receives the cutting or drilling tool at one front side thereof and is equipped with a coaxially arranged sleeve member, which is slidably and rotatably connected thereto. First, stop means limit sliding and rotational movement and second, locking means block sliding and rotational movement of the sleeve member. A scale on the sleeve member indicates the amount of axial displacement thereof relative to the body member. The apparatus is especially suitable for use with a conical sheet metal drilling tool.

Abstract: The depth control assembly for attachment at one end to a machine tool and at the other end to a drill plate of a jig having selected guide holes positioned over points to be drilled in a production part. The depth control assembly is a spring-loaded adaptor which spaces the drill a constant distance from the production part, regardless of differences in distance between the face of the drill plate and the production part. Through the use of the depth control assembly, an operator can drill holes of a constant depth in the production part without taking separate measurements and making new depth adjustments at each hole location.

Abstract: A depth stop for a drilling tool comprises a rod 12 mounted on the tool body for sliding movement in directions parallel to the drilling movement, and a locking lever 15 pivotally mounted about a pivot boss 16 which projects at a substantially right angle to but is offset from the rod. The rod, extends through an aperture in the upper part 18 of the lever which aperture provides a radical clearance for the rod, and a spring 19 biases the lever so as to bring a peripheral edge or opposite peripheral edges of an aperture through the lever into frictional engagement with the rod and the biasing direction is the same as the direction in which the rod tends to move when it comes into abutment with a workpiece. The rod can be released by manually swivelling the lever against the spring force. The rod 12 may have a knurled surface 14 so as to provide substantially a mechanical lock with the co-operating peripheral edge of the lever aperture.

Abstract: This disclosure relates to apparatus and method of forming circular holes in plate glass. A circular cut is made in the glass to a predetermined depth, which is less than the thickness of the glass by approximately 0.5 to 1.0 mm. After this cut has been made, the cutting apparatus is removed and the glass is softly struck adjacent to the circular cut in order to break loose the glass disc enclosed by the cut. The edge or margin of the hole may then be smoothed by grinding or polishing. The glass cutting apparatus includes a circular saw or glass cutter which is rotated to cut the glass. A stopper of the apparatus is adjustably mounted adjacent the cutting edge of the saw and stops the saw from cutting further after a predetermined depth has been reached. The position of the stopper may be adjusted for different thicknesses of glass.

Abstract: An attachment kit is disclosed for converting a standard radial arm saw to a horizontal drill press. The kit includes a drill holder that attaches to the arbor of the radial arm saw's motor, a drill, a work support platform for holding a workpiece at a correct height and a work holder assembly for holding the workpiece to the upper surface of the work support platform.

Abstract: A drill stop having a dimple arranged so that the drill stop can be utilized after the drill has been ground to a shorter length. A cylindrically shaped tubular member is provided with a dimple off center with respect to the longitudinal axis which dimple provides an interference fit in the drill flute along the run out ramp portion of the flute adjacent the shank end of the drill. A further dimple opposite the first dimple may be utilized to reinforce the function of the first dimple.

Abstract: A drill stop having a dimple arranged so that the drill stop can be utilized after the drill has been ground to a shorter length. A cylindrically shaped tubular member is provided with a dimple off center with respect to the longitudinal axis which dimple provides an interference fit in the drill flute along the run out ramp portion of the flute adjacent the shank end of the drill. A further dimple opposite the first dimple may be utilized to reinforce the function of the first dimple.

Abstract: Device for drilling a hole of predetermined depth having an abutment member non-rotatable in relation to the stationary part of the drilling machine and provided with an abutment surface intended to come into contact with the work piece by the displacement of the drill spindle of said drilling machine towards the work piece, a driving member intended to be connected to the drill spindle said driving member being rotatably and displaceably arranged in relation to the abutment member, a holding member intended to hold the drill and being rotatably mounted relative to the abutment member and displaceably but not rotatably connected to the driving member and provided to be secured against axial displacement in relation to the abutment member and a spring provided between said driving member and said abutment member, the driving member being displaceably in a direction towards the work piece against the action of said spring.

Abstract: A depth stop is mounted on the casing of a drilling machine and includes a clamping lever with a bore through which an elongated rod extends. The rod acts as the stop. Lugs attached to the casing pivotally support the clamping lever. The lever has a clamping surface which engages the surface of the casing in the clamped position. The clamping surface extends circumferentially of the axis of the bore in the lever and is arranged eccentrically relative to the axis.

Abstract: Increased resistance to excessive wear rate is provided in certain automobile automatic transmissions by providing a combination of radial-bushing and thrust-washer at a certain position on the oil pump stator where the customarily manufactured transmission is provided only with a thrust-washer. The combination of radial-bushing and thrust-washer provides bearing surfaces for the direct clutch drum to revolve against in both the lateral and radial directions.

Abstract: Cutting tool assemblies each of which includes a cutting head attached to the end of a shank holder and a drill adjustably mounted to be moved longitudinally of the shank holder and projecting through the cutting head. In one form the cutting head is a chamfering tool which produces a countersink in the top of the hole in a workpiece bored by the drill. In another form the cutting head is a spot-facing tool which produces an annular flat surface around the hole bored in the workpiece by the drill. The cutting head is fixed to the shank holder and is driven thereby. The drill is clamped to the cutting head so that it is driven with the cutting head by the shank holder. Adjusting means is provided to move the drill axially in the shank holder so that the cutting head completes its cutting operation when a hole of the proper depth is drilled, or shortly thereafter.

Abstract: A longitudinal cutting tool is formed with at least one groove and a stop collar is received on the cutting tool. The stop collar has a stop surface, and yieldably resilient means in the form of a threaded screw passing through a slot in the collar, and rubberized buttons inserted into the collar are used to adjust the collar on the cutting tool, and to operatively connect it thereto so as not to damage its groove; the cutting depth of the tool is limited when the stop face engages with the stop surface.

Abstract: A housing to fit over a drill contains a pair of sleeves with facing inclined surfaces that approach each other to force a washer located between the surfaces into an inclined position to lock onto the drill. A spring located on each side of the washer extends to the adjacent sleeve.

Abstract: A substantially cylindrical hole is drilled into a support structure, and the end of the hole remote from the point of entry of the drilling tool into the structure is enlarged in its cross-sectional area so as to provide abutment surfaces for spreading portions of a fastening element inserted into the hole subsequently to the drilling thereof. The drilling tool includes a drill shaft, and a drill bit connected to the free end of the drill shaft and having lateral cutting edges. The cutting edges may diverge in direction axially away from the drill shaft and a collar may be provided on the drill shaft which, in cooperation with the inner surface bounding the hole forms a fulcrum for a lever-type angular displacement of the drilling tool for increasing the cross-sectional area of the remote end of the hole.