Abstract: An apparatus for the positional adjustment of cutting tools for use on machine tools has a first block having a gauging surface mounted thereon and translationally and swivelly movable on a perpendicular shaft. A second block is coupled to the first block in such a manner that the two blocks move together translationally with the first block being free to swivel relative to the second block. The second block carries indicating means for indicating the amount of translational movement of the two blocks.

Abstract: A multiple piercing apparatus for piercing a workpiece having a plurality of reference marks defining the piercing locations. A plurality of adjustably movable piercing unit cases are opposedly arranged on opposite sides of a machine bed. A piercing element, such as a twist drill or punching assembly, is mounted for movement with respect to the unit case to be aligned with a respective reference mark in response to data received from a sensor, such as a camera or photo-sensor.

Abstract: A device for drilling an undercut in a borehole in a receiving material comprises an axially extending guide sleeve with an eccentric bore and an eccentric bushing located in the eccentric bore and being rotatable therein relative to the sleeve. A tension spring is located between the sleeve and the bushing. During rotation of the bushing, relative to the sleeve, the torsion spring is stressed. A drive shaft with a cutter head at one end extends through the bushing and is brought into an eccentric position relative to the sleeve and at the same time commences an undercut in the borehole. A lock is provided with a set of teeth on the sleeve preventing rotation of the sleeve with the bushing. When the maximum eccentricity of the drive shaft is established, the lock can be released and the sleeve rotated along with the bushing by an eccentric transmission. During such rotation, a complete circumferentially extending undercut can be formed in the borehole.

Abstract: The present invention relates to an improved thread-tapping device which permits both conventional and non-conventional driving means to be used to drive the tap to form threads in a hole. The improved thread tap has a conventional set of flats arranged in a square configuration with each flat being spaced about the circumference of the shank at approximately 90 degrees with respect to one another. This first set of flats extends longitudinally at or about a free end of the shank of the thread tap in the direction of the cutting portion of the thread tap. Positioned between this first set and the cutting portion is a second mounting section which has a plurality of flats divisible by three. This second set of flats is circumferentially spaced about the shank of the thread tap and longitudinally extends from about the terminus of the first set in the direction of the cutting portion. The first set of flats is conventional and can be mounted within a conventional tap driving device.

Abstract: A rotary tool holder of the type including a stationary shell adapted to be reciprocally positioned within a bushing plate and a shaft mounted rotatably within the stationary shell. An annular space is provided between the shaft and the shell and the shell includes an enlarged diameter collar portion proximate one end of the shell and a reduced diameter pilot portion extending from the collar portion to the other end of the shell. The pilot portion is slidably received in the bushing plate and the collar portion receives a pressurized coolant fitting. Needle bearings are provided in the annular space between the shell and the shaft proximate the pilot portion and a pair of annular seals are provided in the annular space between the shell and the shaft proximate the collar portion. The annular seals are positioned on opposite sides of a radial passage formed through the collar portion and through the shaft for communication with a central axial bore in the shaft.

Abstract: A boring apparatus wherein the size in the axial direction of the shaft of the manual handle horizontally supported can be made small-sized. A clutch is composed of spherical bodies, a cylindrical body having formed therein hole portions for receiving the spherical bodies, spherical body pressing means for pressing the spherical bodies to the outside or inside of the cylindrical body, and an engagement member having recessed portions engaging with the spherical bodies which are projected to the outside or inside of the cylindrical body, and the boring apparatus is constructed by using the clutch.

Abstract: In apparatus for driving a spindle of a machine tool, the spindle being rotatably supported in a spindle housing and received in a took mounting opening adapted to be inserted with a pull stud at a front end thereof, including a took clamping drawbar provided with a collet for clamping the pull stud at a front end of the drawbar, and a device for axially moving the drawbar, there is provided a device interposed between the inner surface of the spindle and the outer periphery of the drawbar for transmitting a torque from the drawbar to the spindle. The drawbar is connected to a source of drive of the spindle.

Abstract: A keyless chuck for a rotary tool comprises a chuck body which is adapted to be coupled at its one end to a drive spindle of a drive source and coupled at the other end to a tool bit for establishing a driving connection from the drive source to the tool bit. Relatively rotatable to the chuck body is a sleeve ring which is operatively connected to a set of gripping jaws for tightening the gripping jaws on the tool bit upon being rotated in one direction and loosening the same upon being rotated in the opposite direction. A one-way clutch is provided to rotatively fix the sleeve ring to the chuck body when the chuck body is driven to rotate in the direction of turning the tool bit reversely.

Abstract: A chuck jaw assembly for use in an apparatus for setting fasteners is disclosed having an elastomeric connector, or retaining member, that holds the jaw teeth of the chuck jaw assembly in the proper axial and circumferentially spaced positions with respect to each other. The jaw teeth have a forward conical section and a rear cylindrical section with a groove formed at an outer periphery. A ring portion of the retaining member is received int he groove and spacer elements that extend inwardly from an inner periphery of the ring portion are received in circumferential gaps between the jaw teeth to ensure that they are maintained in the proper circumferentially spaced positions. A mold having the proper configuration for forming the retaining member is disclosed. An elastomeric material is injected into the mold and is allowed to cure. The retaining member is then removed from the mold.

Abstract: A compact boring system 20 for machining the interior surface of cylindrical shapes, such as steam turbine valves and rotors in a field situation. The apparatus is designed to set up in the object itself. A boring bar 26 is rotatably disposed in a pair of roller bearing supports 23. A plurality of locating buttons 29 extend radially from the bearing supports 23 to contact the interior of the object and support the apparatus therein. The bearing supports 23 can be secured to the boring bar 26 at any axial location thereon. A machining head 35 is also securable to the boring bar 26 at any axial location, and includes a threaded drive shaft 38 for translating the machining head 35 axially along the bar 26. A cutting tool 56 is disposed in the machining head 35 so as to be radially adjustable with respect to the axis of the bar.

Abstract: A chuck having a spring collet is disclosed. The spring collet has a plurality of pairs of adjacent collet segments with interstices formed between each of the collet segments. The interstices of the collet each having radially extending cutout seats with resilient stoppers received therein which extend between a tool received in the collet and the body of the chuck to prevent coolant from leaking therebetween when flowing through the collet by way of a duct in the tool. The stoppers of the collet are axially spaced from each other so as not to weaken the collet.

Abstract: A glass drilling machine for drilling holes in a sheet of glass in which each hole is partly drilled from one side of the sheet and is then finish drilled from the opposite side. The machine is made up of aligned first and second drilling devices which are attached near the ends of first and second pivotable arms, respectively, the first and second arms being periodically pivoted toward and away from the sheet to bring the drilling devices into and out of drilling engagement with the sheet. The first and second arms are releasably clamped to first and second spindles, respectively, which pivot about first and second axes, respectively, the first and second axes being spaced apart but close to one another and positioned remote from the drilling devices. The position of the first arm is adjustable along its longitudinal axis and the position of the second arm is adjustable along the axis of the second spindle.

Abstract: A pressure foot for a machine for drilling a printed circuit board is supported to be slidable in an axial direction of a rotor shaft and is connected to a vacuum suction source. The pressure foot is adapted to depress the printed circuit board during a drilling operation. A first air pathway is formed from a first supply port formed in a side wall of the pressure foot to a plurality of first blow-out ports formed in a contact surface of the pressure foot with the printed circuit board. The first supply port is connected with a pressure air source. A second air pathway extends from a second supply port formed in the side wall to a plurality of second blow-out ports opened toward an interior of the pressure foot. The second air pathway is in communication with a supply source of a pressure air. Thus, the working time and cost are reduced.

Abstract: A selective drill bit attachment for a standard portable electric drill is provided and includes a housing for carrying a plurality of different sized drill bits in which one of the drill bits can be selected and manually extended into an operable position so as to be used by a standard portable electric drill. In a modification a locking mechanism is utilized to hold the selective drill bit stationary to the housing.

Abstract: Disclosed is a doweling jig which allows a workpiece to be positioned on the top surface of a platform to guide the drilling of corresponding holes into the workpiece at preselected locations. The workpiece-supporting platform includes a pair of side edges and a guideway which extends along the edges. A plurality of drill guides, each of which includes a guide opening, is removably engageable with the guideway to be positionable at preselected locations along either of the side edges. The workpiece may be positioned on the platform and against the drill guides for the drilling of holes in the workpiece through the guide opening in each drill guide. The jig may be configured to allow for simultaneous drilling of holes in two or three adjacent surfaces of the workpiece.

Abstract: In a wedge ring mechanism for providing a collet clamping force in a machine tool spindle, a sleeve member retains a plurality of steel balls. A mechanical advantage is realized as the balls are wedged between obliquely inclined surfaces. The sleeve member is provided with a plurality of cylindrical passageways so that positive control over the motion of the balls is maintained at all times during both engagement and release of the collet clamping force, thereby obviating the need to pinch out the balls during release.

Abstract: A positive feed drill and method of operation is disclosed for drilling through a workpiece consisting of a softer overlay material on a harder base material. The positive feed drill includes a high-speed air motor and a low-speed air motor and will start and drill through the softer overlay material at the high speed but will shift to the low speed when the drill senses that the thrust on the drill bit has increased because the drill bit has contacted the harder base material. After drilling through the harder base material, the drill bit will shift to the high speed because the drill senses that the thrust on the drill bit has decreased. The drill will retract from the workpiece at high speed and will shut off. Control apparatus is provided to control the flow of air to the high-speed and low-speed air motors. Sensing apparatus senses the thrust on the drill bit and sends a signal to the control apparatus to switch between the air motors.

Abstract: This invention relates to a machine tool having a table for mounting a workpiece. The body of a machine tool is equipped with a table for mounting a workpiece. The table is further equipped with a rotary table. When performing turning operations of the workpiece, the workpiece is mounted on the rotary table. On the other hand, when performing other operations, except for the turning operation, the workpiece is mounted on the non-rotary table. In addition, if desired, the workpiece can be mounted on both the table and the rotary table for performing other operations.

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 drill tool-holder comprises close to its end at least two radial cavities each opening outwardly of the tool-holder and inwardly of its axial bore, and each adapted for housing a ball, or cylinder, the outlet orifices of the cavities being dimensioned so that the ball, or cylinder, may be introduced from the outside into these cavities, but cannot come out thereof towards the inside of the tool-holder axial bore, which tool-holder is characterized by the fact that there is associated therewith a piece made from a hard material (3) whose body (10) has the same form as the cavities and may be housed therein without play, and has on each of its opposite faces a projecting portion (11,12) in the form of a small bar.