Abstract: Counterbore milling cutter employing Trigon inserts mounted with the active cutting edge extending radially to provide right angle counterbore corners with 84.degree. included angle cutting points for greater strength and support than possible with conventional triangular inserts. A pair of pocket shoulders at the end of the body adjacent a pilot extension locate each insert held by a central screw offset toward the pocket shoulders, preferably configured to best resist torque imposed by axial force against the cutting edge.

Abstract: In an apparatus for making at least one linear measurement, elongated flexure members are positioned to have a movable end move corresponding to the linear dimension being measured. The flexure members are the type utilizing a pair of parallel beams so as to obtain parallel motion and obtain an accurate measurement of the movable end.

Abstract: On-edge indexable insert for cutting radiused corners including circular arc cutting edges each with trailing surface formed with convex compound curvature as a toric segment intersecting the adjacent side wall to provide a planar abutment surface when a cutting edge is indexed to an inactive position.

Abstract: A coated densified ceramic cutting tool has a granular phase of silicon nitride, silicon aluminum oxynitride, and a reaction formed submicron refractory metal nitride uniformly distributed in a matrix of a suitable densification aid with a coating comprising an interfacial layer of titanium nitride followed by at least one layer of refractory metal material.

Abstract: A cutting tool employing negative cutting inserts providing both high volume stock removal and a fine surface finish. The insert utilizes negative radial and positive axial rake angles and incorporates a lead angle of between about 30.degree. degrees to about 90.degree. degrees.

Abstract: A device for locking a tool to a cutting machine. During a locking action a drawbar is rotated to bring a radial lock pin into registry with oppositely directed bayonet slots formed in a tool that has been inserted into a pocket in the end face of a tool holder; a spring acts on the drawbar to move the lock pin into the bayonet slots. The lock pin is carried on a nose element that is threaded onto the drawbar for drawing the lock pin toward the drawbar to achieve an axial lock force between the tool and the tool holder. Tapered frusto-conical surfaces on the tool and holder produce a self-centering tapered sticking lock action. The oppositely directed bayonet slots allow the tool to be forceably dislodged from the sticking taper when the drawbar is rotated in a reverse direction.

Abstract: A cutting tool employing negative cutting inserts providing both high volume stock removal and a fine surface finish. The insert utilizes negative radial and positive axial rake angles and incorporates a lead angle of between about 30.degree. to about 90.degree..

Abstract: Mechanical fine adjust boring head including an adjustment drive train through a worm wheel drive of an eccentric cam orbiting a drive key engaging a slide to effect linear radial adjustment. Anti-friction bearings for the cam and orbital drive connection between the cam and drive key provide for smooth nonbinding adjustment.

Abstract: An indexable cutting insert of the type having a corner radius and a corner angle adapted for finishing operations comprises a pair of substantially parallel spaced apart faces and at least one peripheral side surface being substantially normal to said faces. A pair of straight cutting edge extend away from the corner at the juncture of the peripheral side surface and a plane positioned closely adjacent and below the juncture of a respective face. To break the chips formed during cutting, a chip breaker recess extents rearwardly and along the cutting edges. The chip breaker recess includes a descending control surface leading to the bottom of the recess followed by an ascending control surface. The descending control surface comprises a first and second planar descending control surface with the first surface being at a shallow angle and the second surface being at a steep angle.

Abstract: A boring bar has a longitudinal axis, with a steel head section having a cutting insert displaced from the longitudinal axis. In one embodiment, a cemented carbide section is joined directly thereto. In another embodiment, a intermediate section includes a devibrator body. The respective sections are joined by a centrally positioned drawbar threadedly inserted into the head section for maintaining a compressive force at the specifically configured connection between the axially aligned sections.

Abstract: A replaceable insert cutter comprising a cutting body, a plurality of insert pockets in the periphery of the body, each pocket having an insert back locating wall establishing insert circumferential position, a V-shaped support seat establishing a radial and axial position of the insert in a radial threaded screw hole extending through from the V support seat, a cutter insert mounted in the pocket having a back surface engaging the back locating wall, a V base of the insert seated on the support seat, a screw hole and screw extending radially through the insert and retaining engagement with the threaded screw hole, and a radially outermost cutting edge facing circumferentially away from the back surface.

Abstract: A roller assembly of the type which receives a pair of bearings for journaling the roller for rotation about a longitudinal axis, includes a ceramic member having an annular shape about the axis with an outwardly facing surface and an inwardly facing surface positioned between respective ends of the ceramic member. A pair of end flanges engage the ends of the ceramic member and are interconnected for holding the ceramic member under a compressive force in both the longitudinal and radial direction.

Abstract: Apparatus and method for detecting energy, such as power, consumed by a load is disclosed. The apparatus preferably takes the form of a housing of sufficiently small size to be mounted in a motor control panel of a machine tool. The apparatus includes a digital processor adapted to enable bidirectional communication between the device and an external computer such as a host computer or machine controller. The processor is also used to perform various calibration functions.

Abstract: A facing head is described comprising two slides which are arranged adjacent each other in a radial plane and on a tool adjustment for active force balancing. The slides are formed as two parallel connecting links (couplers) between two double-armed cranks of a parallel crank mechanism. On tool adjustment, the slides are moved simultaneously and oppositely to each other while they describe a part of a circular path. Guiding of the slides reduces the influence of the centrifugal force on the slide drive force. The cutting angles of tool cutting edges disposed on the slides, therefore, change only slightly on tool adjustment.

Abstract: An elongated grooving or threading tool has a cutting section, an intermediate section including a devibrator body, and a rearward cemented carbide section which are, respectively, held together in axial alignment by a drawbolt which engages the cutting section and cemented carbide section for holding the intermediate section under compression.

Abstract: An adjustable tool holder for cutting tools in boring machines having an internal drawbar includes a housing pivotally connected to a rotary spindle and a forwardly disposed cutting tool. A wedged camming surface is positioned forwardly on the drawbar for contact against an internal drive lever axially disposed for pivotal contact against the housing. Upon actuation of the drawbar the housing is stressed to a canted position causing pivotal adjustment of the cutting tool.

Abstract: Various techniques are disclosed for controlling the operation of a workpiece inspection procedure using a battery operated probe to contact the workpiece and transmit information back to a controller in a machine tool system. In one embodiment, battery power is applied to the probe transmission circuitry in response to a flash of infrared radiation. In another embodiment, the probe is turned on by touching the probe against a reference surface. In both embodiments, a timer is provided to automatically disconnect the batteries after a predetermined time period. In such manner battery life is prolonged.

Abstract: A differential drive for rotation of a central shaft correspoding in contrast to a conventional axially displaced drawbar. The invention employs a harmonic drive gear arrangement having a stationary axle and a servo motor driven rotary axle to produce zero differential out of the radial spline when the servo driven axle is stationary. Servo controllled displacement occurs through rotation of the servo driven axle with a substantial reduction with respect to rotation of the stationary axle, e.g., in the order of 97:1.

Abstract: A corrosion resistant cemented carbide composite constitutes from about 2 to about 30 percent by weight metal binder and from about 70 to about 99.5 percent by weight metal carbide wherein the metal carbide comprises about 2 to about 80 percent by weight of a transition metal carbide or mixtures thereof selected from Group IVB and Group VB of the Periodic Table of Elements and from about 20 to about 98 percent tungsten carbide. The metal binder phase comprises a major portion by weight nickel and from about 5 to about 30 percent by weight chromium. The cemented carbide composite comprises a granular tungsten carbide phase, a semi-continuous solid solution carbide phase extending closely adjacent at least a portion of the grains of tungsten carbide for enhancing corrosion resistance, and a substantially continuous metal binder phase.

Abstract: In a ceramic indexable cutting insert, an edge strengthening land extends rearwardly of a beveled cutting edge at an angle of from about 80 to about 100 degrees with respect to the peripheral side surface, and a grooved recess extents rearwardly and along the edge strengthening land to direct chips upwardly and outwardly away from the insert and the cutting edge. In one embodiment of the present invention intended for conditions of heavy depth of cut, enhanced edge strength is sacrificed and an edge strengthened land is not provided.