Abstract: A boring tool for the fine finishing of surfaces of holes having at least one cutting bit and at least one guide ledge which are introduced and fixed in place in grooves arranged in the circumferential surface of the base body of the boring tool, characterized by the fact that a setting device is provided which is positively coupled with at least two cutting bits associated with each other; that the cutting bits are arranged displaceable by means of the setting device in the base body with respect to the circumferential surface; that the association of the cutting bits consists in that they are displaceable in opposite directions, with respect to the axis of rotation or center line of the boring tool; and that the setting device in each case displaces one cutting bit into a working position and the other cutting bit into a position of rest.

Abstract: A deburring tool is provided having two sets of blades for use in simultaneously deburring the inner and outer edges of a piece of tubing, further including adjustment capability allowing the use of the tool in deburring tubing of different sizes, further including a cap recess cleaning tool, a cleaning brush and a base for mounting the deburring tool on a bench, table or the like.

Abstract: Drilling head comprising a body for fastening in a mounting support. The body carries a pair of radially movable tools. A casing is mounted for axial displacement along a bore in the body, the casing being rotatable relative to the body about the axis of the bore. Structure is provided for rotating the casing in the bore and for moving the casing axially along the bore. The casing supports pins which are engageable with both tools of the pair of radially movable tools and which in one axial position of the casing along the bore move both tools in opposite axial directions upon rotation of the casing and which in another axial position of the casing along the bore contact only one tool to move only that one tool radially relative to the other tool.

Abstract: A counterbore for the bilateral mounting of plane surfaces on through holes that consists of a tool head that may be driven rotationally by means of a shank. The counterbore has two cutting heads with cutting edges pointing in opposite directions. The cutting heads are guided within the tool head in take-up slots in such a way that they may be moved out radially and fixed in a preselected position. The cutting heads lie against one another within the area of the take-up slots. In order that high cutting forces may be transmitted easily in a tool head of small dimensions, the cutting heads are guided through a guide slot extending in a radial direction and positioned in the take-up slots of the tool head.

Abstract: A thread cutting apparatus and method are disclosed for the formation of tapered threads on the end of an elongated reinforcing bar of the type used in concrete structures. The apparatus includes a cutting head assembly having tool holder arms that are cantilevered outwardly from a face or barrier surface to effect cutting of the threads outwardly of the barrier so as to protect the guideways and cutting displacement structure control structure from chips and debris. The apparatus includes positive lead control for the thread cutting chasers, a rigid clamping structure for the bar and a fluid control assembly. The fluid control assembly is capable of positioning the cutting head and housing for one or a multiple number of frusto-conical cuts of predetermined depth to permit the simultaneous formation of threads and removal of material from the reinforcing bar end.

Abstract: An automated machine tool is provided having an adjusting apparatus for changing the cutting radius of a cutting tool by changing the tool's position on a horizontal axis perpendicular to the axis of rotation of the cutting tool. A constant cutter feed rate is maintained by adjusting the rotation rate of the cutting tool in proportion to the distance of the cutting tool from the centerline of rotation.

Abstract: A revolving drill head or the like with finely adjustable tool carriers at right angles to its longitudinal axis having high rigidity material-elastic intermediate members operable by a hydraulic pressure medium supplied coaxially to the shaft of the drill head in a feed mechanism, which is positioned in fixed manner between the shaft and the tool carrier and having two flange-like connecting parts to the shaft or tool carrier connected by two axially parallel, resilient parts at right angles to the shaft axis as a parallel guide and with counter-directed, diametrically facing shaft axis parallel extensions which are symmetrical to and spaced from the shaft axis and between which is provided an expansion member as a material-elastic intermediate member in a plane at right angles to the shaft axis, each of the flange-like connecting parts has a compensating device diametrically facing with respect to the shaft axis the extension fixed thereto for compensating its unbalance in at least one relative position of

Abstract: The milling cutter with a feeding motion in forward and reverse mills plane surfaces of large diameter in the area of through holes and consists of a tool head 17 which can be driven in rotation by a shank 17 and in which are mounted two cutting parts so as to be radially movable and lockable in seating slots. The cutting parts are shifted by means of a rocker which is disposed so as to be rotatable about the longitudinal axis of the tool and whose steering bolts attached to its face and pointing in an axial direction engage associated recesses in the cutting parts in the manner of crank pins.

Abstract: Tool includes a plurality of circumferentially spaced radially extending guideways in an end face thereof for receipt of a corresponding number of cutting tool holders. The radial inner ends of the holders have cam followers thereon which are urged radially inwardly by spring members into engagement with one or more correspondingly tapered cam surfaces on a central pusher element. The pusher element is supported for axial movement within a longitudinal bore in the cutting tool and is precisely axially movable in opposite directions to cause precise radial inward and outward movement of the tool holders within such guideways.

Abstract: A boring machine comprises a hollow rotary spindle, a pair of swing arms attached to the front end of the rotary spindle to extend in symmetric radial directions with respect to the rotary spindle, and a driving mechanism disposed within the rotary spindle for driving the swing arms. A pair of rams can be assembled respectively in the swing arms to be symmetrically movable in radial directions and a ram driving mechanism is also disposed in the rotary spindle. Cutters are supported to the front ends of the swing arms or rams.

Abstract: A boring head (10; 50) for internal machining of bores in workpieces comprising an insert holder (16; 41) and an operating means (18; 27; 51, 52) resting thereagainst. The operating means is adapted to adjust the insert holder (16; 41) radially when turned about its longitudinal axis. The boring head (10; 50) is associated with control means (21; 28; 63), which are adapted to turn the operating means (18; 27; 51, 52). To advantage the boring head might be provided with a cutting insert, the cutting edge of which comprises a straight forward portion (68) and a convex rear portion (69).

Abstract: A skiving tool having a retractable knife for use in combination with a roller burnishing tool for finishing the internal surface of a cylindrical hole. The retractable knife includes a pair of radially extendible knife holders defining a camming path having an axial portion and an angled portion. A push dart has a camming element with complementary camming surfaces which rides along the camming path. Axial actuation of the push dart causes the knife holders to extend radially into a stable, locked position. The roller burnishing tool includes a roller race having a central axis and a frustoconical outer surface tapering radially outward and axially forward. A plurality of frustoconically tapered rollers are arranged about the outer surface for rolling engagement with the outer surface with the smaller ends of the rollers facing forward. The taper of the rollers is such that the outermost surface portion of each roller is parallel to the central axis.

Abstract: The present invention relates to a boring device for boring internal surfaces of hollow workpieces of the kind which comprises radially adjustable insert-provided holders, there being provided pressure means, such as steering pins so as to effect radial adjustment of the insert holder from an outer active working position to an inactive position. The radial adjustment occurs by having each insert holder via said steering pins supported against a bushing of non-circular cross section actuatable by a shaft member centered within the bushing, said bushing upon its rotation effecting said radial adjustment.

Abstract: A tool having a shank, cartridges on the shank positioned by a screw having two externally threaded parts which engage two internally threaded sleeves which in turn engage threaded openings in the cartridges. One of the threaded openings being right-hand thread and the other opening being left-hand thread. Thus, the cartridges can be moved laterally together or individually by rotating the screw or any of the sleeves.

Abstract: An adjustable multiple blade boring bar with diametrically disposed overlapping blade blocks, each adjustable in and out and a control cartridge having actuator pins movable in opposite directions in response to rotation of a differential screw, the pins being oriented in relation to slots on the blade block to move in a camming relationship to shift the blocks in and out. A differential screw associates the control cartridge and the boring bar to permit radial equalization of the blade block when installed initially or after sharpening.

Abstract: The head of the boring bar of a boring tool has a recess flanked by two toothed internal surfaces which extend forwardly and outwardly with respect to the axis of the bar and face each other. The bit carriers have toothed surfaces which engage the respective internal surfaces and are clamped against such internal surfaces by screws whose shanks extend into tapped bores of the head. The axes of the tapped bores make an acute angle or are parallel with the axis of the bar, depending on the diameter of the bar. Each carrier has an elongated slot for the shank of the respective clamping screw, and each carrier can be shifted lengthwise of the respective teeth by a discrete adjusting screw which meshes with the bar.

Abstract: A valve seat forming tool includes a pilot rod that may be inserted into the valve rod opening of an engine block. A cutter assembly including a pair of cutter blades projecting radially outwardly from the assembly is rotatably positioned on the rod and may be rotated to cause the cutter blades to engage and resurface a valve seat. The tool may be placed in a calibration block to calibrate blade position. Subsequent to calibration, the assembly is positioned over a valve seat of an engine block. The cutter blades are then radially adjustable by means of a micrometer and subsequent to adjustment the cutter blades are rotated manually to cause the blades to reform the surface of the valve seat.

Abstract: In the machine tool art, a dual cutter boring head which comprises a cylindrical body having side-by-side, tool-holding slides mounted diametrally thereon; the slides at their outer ends being fitted with cutters disposed exteriorly of the periphery of the body, and micro-adjustment mechanism within the confines of the body arranged to impart simultaneous, opposed, reversible motion to the slides whereby to precisely and equally adjust the slides and the cutters thereon outwardly or inwardly, selectively.

Abstract: The deburring and reaming tool of this invention has a housing with a rotatable driven or supporting member that engages one end of a torsional-compression spring, the other end of which engages a reciprocatable, rotatable intermediate member having radially off-set lugs or projections that are engagable with slots in a pair of side-by-side cutter members slidable carried transverse the other end of the housing for simultaneous extension and retraction. Means are provided in the housing to adjust and limit the degree of rotation of the intermediate member and to extend and retract the intermediate member and its lugs or projections into and out of engagement with the slots in the cutter members.

Abstract: An inside-outside deburring tool and flycutter having a body provided with an internal slot in which are slidably disposed a pair of tool bit holders. Interchangeable support elements mount the holders within the slot in such a manner that the holders are adjustable within the slot either independent of or equally and oppositely with one another.

Abstract: A honing template comprising longitudinally extending fingers adapted to surround a hone and the ends of which carry template segments having inner abutment surfaces that are spaced to abut non abrasive surfaces that are in line with the stones when the stones are expanded to the finished diameter of the cylinder being honed. The inner abutment surfaces of the segments have a radius at least as great as the maximum radius of the cylindrical surface to be honed. The fingers have a tapered surface that is abutted by an annular ring which is wedged over said tapered surfaces to adjust the radial position of the template segments.

Abstract: A drill for use in boring machines has a tool holder with two cutter bars having cutters projecting radially therefrom. The cutter bars are movably mounted in a radial direction in a recess passing through the tool holder. The tool holder includes a base part and walls projecting therefrom forming the recess therebetween. The cutter bars are arranged in this recess in end-to-end relation and are of a width substantially equal to the width of the recess. The base is provided with two slots therein communicating with the recess, the slots being offset with respect to each other and each extending from the outside of the base in a direction substantially parallel to the length of the recess up approximately to the central axis. Bolts engaged in the parts on opposite sides of the slots can be tightened to deform the walls of the recess so as to clamp the cutter bars therebetween.