Abstract: Boring bar having plural circumferentially spaced cutting inserts with incremental radial and axial spacing for innermost radial and foremost axial to outermost radial and rearmost axial in progressive sequence relative to the direction of rotation.

Abstract: A boring type tool includes mean for biasing a cutting bit in a first radial direction with respect to an axis of rotation and means for adjustably moving the cutting bit to a predetermined desired position against the force of the biasing means. The adjustable moving means includes a fluid pressure source for an incompressible electrorheological fluid and a means communicating with the fluid pressure source and the cutting bit for the flow of electrorheological fluid for adjustably moving the cutting bit in a direction opposing the first radial direction in proportion to pressure being generated by the fluid pressure source. A valve means is operably associated with the communicating means for effecting changes in the dynamic stiffness of the electrorheological fluid in response to an electric field.

Abstract: A tapered drawback collet which engages a conically tapered collet chamber in chuck body. A collet extension is axially displaced through high reduction gearing including a worm gear and threaded feed ring acting on a sleeve having only axial contact with the collet extension and therefore is free of any radial loading.

Abstract: An indexable slot cutting tool for narrow widths having both head and base members with adjacent opposed cutting faces. An axially oriented sleeve with right hand differential pitch threading engages the head and base members to effect axial movement of the cutting faces for slot adjustment.

Abstract: A center cutting end mill incorporating indexable inserts with positive axial rake angles. Multisegmented rake faces provide support for positive rake cutting edges enabling an improved feed rate.

Abstract: An improved end mill and method of manufacture with an enhanced number of effective teeth. A unique segmented insert configuration maintains a positive axial rake in a negative rake seating face.

Abstract: An adjustable cartridge to be mounted in a boring bar, the cartridge including a anvil rotatably affixed to said boring bar, the anvil including a pocket into which a lay-down indexable insert is affixed. The anvil is secured in an axially oriented slot which includes an arcuate seating face. Rotation of the anvil within the slot effects radial adjustment of the insert.

Abstract: A plurality of adjustable feelers are mounted to a gage head in front of relatively delicate sensing fingers. The feelers will contact the part before the sensing fingers in the event of part abnormality or improper positioning of the part within the gaging apparatus. In such manner, further movement of the gage head relative to the part can be stopped before the sensing fingers crash into the part thereby preventing damage to them.

Abstract: A cemented carbide cutting tool substrate has enhanced surface toughness due to binder enrichment and depletion of aluminum nitride near the peripheral surface.

Abstract: Precision parallel mechanical float for compliance automation gaging, parts handling, assembly and other operations involving a combination of tolerance misalignment. Parallel plates separated by three precision resiliently preloaded flat end rods provide resilient yield in a parallel plane as well as tilting under predetermined loading together with automatic recentering through restoring spring bias.

Abstract: A gauging apparatus for making at least one displacement measurement comprises an elongated flexure member having a pair of spaced apart and substantially parallel body sections. Each body section has an extending portion for contacting a workpiece to be gauged and movable from one position to another corresponding to a displacement measurement. Spaced apart and substantially parallel top and bottom sections join the parallel body sections forming a unitary flexure member having a central opening. The flexure member includes a plurality of webs formed by a sufficiently thin section of material so as to form a hinge. Each of the parallel body sections include a pair of spaced webs for permitting the top and bottom sections to move in parallel motion. The bottom section includes an additional pair of web for permitting movement of the respective extending portions toward and away from each other and a proportional movement of the bottom section in response to such movement of the respective extending portions.

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 gauging apparatus for making at least one displacement measurement comprises an elongated flexure member having a pair of spaced apart and substantially parallel body sections. Each body section has an extending portion for contacting a workpiece to be gauged and movable from one position to another corresponding to a displacement measurement. Spaced apart and substantially parallel top and bottom sections join the parallel body sections forming a unitary flexure member having a central opening. The flexure member includes a plurality of webs formed by a sufficiently thin section of material so as to form a hinge. Each of the parallel body sections include a pair of spaced webs for permitting the top and bottom sections to move in parallel motion. The bottom section includes an additional pair of webs for permitting movement of the respective extending portions toward and away from each other and a proportional movement of the bottom section in response to such movement of the respective extending portions.

Abstract: A disposable cutting insert for chip forming which provides first chip forming surfaces in the form of depressions and second chip forming surfaces also in the form of depressions such that if a respective chip is not curled and broken along a first chip forming surface, a second surface will effect such a result.

Abstract: Coarse/fine adjustment boring head employing a transverse sleeve threaded into and extending through a boring head body providing coarse incremental radial adjustment of an insert cartridge, axially oriented within a sleeve, together with a fine radial adjustment of the cartridge relative to the sleeve effected through a differential screw having differential pitch threads with lead in the same direction.

Abstract: An elongated grooving or threading tool has a cutting section and a rearward cemented carbide section which are, respectively, held together in axial alignment by a threaded fastener and a drawbolt which engage the intermediate section and hold the respective connections under compression.

Abstract: A polygonal indexable cutting insert has a chip breaker with a backwall having a main portion spaced from the cutting edge and including a plurality lands as to deflect chips in a direction toward the center of the insert.

Abstract: A polygonal indexable cutting insert for cutting aluminum metal comprises rounded cutting corners with adjacent side surfaces joined at an angle of from about 33 to about 35 degress. Grooved recesses extending along each cutting edge have a particular geometry which includes a shallow descending surface followed by a steeply descending surface leading to the bottom of the grooved recess. An ascending surface directs the chip upwardly toward the top face and away from the insert and the cutting edge.

Abstract: In a thread-cutting insert of the type having a plurality of teeth, each of the respective teeth of the insert includes a pair of scallops which intersect closely adjacent to the forward cutting edge of each tooth to form a ridge which tends to split a chip.

Abstract: A rotary tool generating head with radial tool slide feed-out produced by differential rotation of central shaft. A harmonic drive gear having a stationary axle and a servo motor driven rotary axle is used to produce zero feedout of the radial slide when the servo driven axle is stationary. Servo controlled radial tool displacement occurs through rotation of the servo driven axle with a substantial reduction in rotational speed with respect to the stationary axle, e.g., in the order of 97:1.