Abstract: A piston bottom for large capacity internal-combustion engines is made by forging a saucer-shaped blank from refractory-forging steel and then in a second forging step transforming the saucer-shaped blank into a cup configuration with a planar rim of the blank being transformed into a cylindrical shoulder and an annular bulge of the blank being transformed into an annular boss for connecting the piston bottom of the cylindrical body of the piston. The blank has a convexity projecting on one side of the blank opposite that formed with the bulge.

Abstract: A sucker rod coupling manufacturing system providing precision squareness of ends with through rolled thread axis characterized by O. D. clamping of the workpiece coupling at all machining operations involving the critical relationship of square shoulders to thread axis and through piloted boring of I. D. to be roll threaded.

Abstract: An apparatus for deflashing a molded recorded disc includes a turntable support for the disc and a scissors type knife having a pair of blades pivotally mounted together with one of the blades being mounted on a support which is positioned adjacent the turntable so that a portion of the flash of the disc extends between the blades. A pneumatic cylinder has a piston rod connected to a knife support to selectively move with the support and the knife toward and away from the disc. The blades have cooperating cutting edges for cutting through the flash and one of the blades has a front end cutting surface for removing the flash when the disc is rotated by the turntable. In the operation of the apparatus the knife first removes a major portion of the flash and then the knife is moved slowly inwardly against the edge of the disc to remove additional portions of the flash until the desired diameter of the disc is reached.

Abstract: A method and apparatus for pre-setting the mounting holes for cutting and ejection tools characterized by a template which has a pattern of holes including centering holes and an arrangement for positioning both a cutting form and an ejection board whether it is the first or second ejection board relative to the cutting form. In the method, the cutting form is placed on the template and the centering holes are formed. Then with a pin received in each of the centering holes formed in the board the mounting holes are formed utilizing the holes of the template for guiding a drill, then an ejection board such as the second ejection board is aligned on the template with the cutting form and has centering holes formed using the centering holes of the template and the cutting form to guide and locate the drill bit. Additional mounting holes can be formed after providing the centering holes.

Abstract: In accordance with a preferred embodiment, a monolith extrusion die is formed by separately drilling matching feed holes for extruded material in each of two plates. In one plate the feed holes are shallow and carefully drilled for accurate alignment with the extrusion slots of the die. In the other plate, the holes are accurately located at the drill entry point, but thereafter rapidly drilled without regard to drift. The plates are then bonded together to form my die.Other methods of forming an extrusion die using two plates are disclosed.

Abstract: A plurality of boring cutters and honing stones are coaxially arranged on a machining head. A bar member is reciprocatingly inserted and splined within a rotary hollow spindle. Both the end opening surface of the spindle and the end of the bar member are taper-engaged with each other so that the bar member may be disengaged and moved forwardly with respect to the spindle. The machining head is coupled with the end surface of the bar member. When the spindle is taper-engaged with the bar member, a workpiece is bored. When the bar member is moved forwardly to release the taper engagement, the workpiece is honed by reciprocating the bar member and the machining head. Thus, the honing operation can be performed with a rigid structure, and both boring and honing operations can be effected by the same machining head.

Abstract: The manufacture of piston rings for internal combustion engines comprises making a ring blank of which the diameter over the outer periphery is greater, and the diameter within the inner periphery is less than that required in the finished ring. A gap is cut in the ring blank to afford two free ends and the ring blank is held in a closed position by the application of a force only to each of the free ends of the ring blank. One or more ring blanks are then clamped in a closed position and machined so that the inner and outer peripheries are circular. This enables a ring to be produced which conforms very closely to a required shape and which thus, in use, provides a good seal between a piston and the associated cylinder of an internal combustion engine.

Abstract: There is disclosed a method and apparatus for the simultaneous machining of a stack of plate-like workpieces wherein the individual workpieces of the stack are initially assembled into a stack which is held in a manner which will not interfere with the subsequent machining operations by use of rivets or the like. The plate-like workpieces are mounted in the stack upon a support plate, and the machining operations are preferably so conducted as to penetrate through the lower most member of the stack and into the upper portion of the support plate. The machine tool is preferably one in which a series of stations for drilling, riveting, machining and then drilling out the rivets is provided. The tool may include means for automatically and precisely moving the stack between the several work stations.

Abstract: The invention discloses a method of forming a terminal for an optical fiber cable consisting of an optical fiber, a plastic buffer and at least a protective sheath. Also there is disclosed a tool for scribing the projecting end of the optical fiber so that the projecting end can be simply separated from the cable and the line of separation will be normal to the end of the terminal or connector. In a preferred embodiment the scribing tool has an equilateral triangular scribing element which selectively presents six active scribing surfaces.

Abstract: A method of fixturing a shoe component from a block of suitable material by forming a first cavity in the block to expose a first surface of the component, applying a release agent to the first surface of the component, placing a body of a rigid material in the first cavity so as to extend over the entire first surface and into the surfaces of the block for adherence thereof to the block of material, repositioning the block, forming a cavity in the repositioned block to initiate the shaping of the shoe component, attaching the shoe component in its unfinished state to the body of rigid material, continuing the formation of the shoe component to completion to free it from connection with the block of material, and releasing the thus completed shoe component from the body of rigid material.

Abstract: There are disclosed two embodiments of a gate valve having a forged body in which a generally rectangular cavity to receive the gate for opening and closing each flowway through the body is formed by drilling a first hole within the forging from which the body is to be made, and then drilling at least one other hole within the forging which is parallel to and overlaps a prior drilled hole therein.

Abstract: A sanitary fan spray nozzle is disclosed together with its method of manufacture. The nozzle includes a passage extending from the interior surface of the tube to an exterior surface thereof. The passage has a relatively large diameter for a portion thereof between the interior surface of the tube and a point within the tube walls. The passage then narrows and is intersected by an arcuate groove having a lengthwise dimension which is substantially parallel to the longitudinal axis of the tube. The width of the arcuate groove is smaller than the diameter of the larger portion of the passage. The nozzle is formed by a method which includes drilling a pair of diametrically opposed small pilot holes through the tube, drilling completely through one of the pilot holes and a portion of the opposing hole with the bit having a larger diameter than the pilot holes. An arcuate groove is then cut within the exterior surface of the tube. The opposite hole is later plugged.

Abstract: A single or multi-orifice metal nozzle structure suitable for use in an ink jet printing system. The metallic nozzle member has at least one orifice extending therethrough, the orifice including a cylindrical portion, adjacent the outlet face of said nozzle, having a height ranging from 0.25 to 5 times its diameter and at least one frustoconical section divergent toward the face opposite the outlet face and communicating with the cylindrical portion. Where the metal nozzle is a multi-orifice metal nozzle, each frustoconical section communicates with a groove disposed in the face opposite the outlet face. The multi-orifice metal nozzle is prepared by grooving a metal plate with at least one groove, punching a plurality of frustoconical sections into the groove member and then forming a cylindrical portion into each frustoconical section and through the plate member.

Abstract: A knuckle casting for a railroad coupler is carried by a conveyor to successively-disposed stations. At a first station, the knuckle casting is positioned relative to reaming tools at opposite sides of the conveyor. Position control arms carry conical members to engage with a pivot pin opening in the knuckle casting and hold-down arms support the casting while the pivot pin opening is reamed to a desired size. Thereafter, the knuckle casting is moved to a rough-grinding station where it is engaged by pin members, one of which extends into the reamed pin hole opening. The knuckle casting is raised to a position above the conveyor where it is rotated for contact with a grinding wheel. The position of the grinding wheel is controlled by a cam driven by an arbor shaft used to support the casting. A cam follower moves a frame that supports the grinding wheel to position the grinding wheel according to a desired contour.

Abstract: A water-cooled electrode holder for use in electric furnaces, comprising a base and a bowl secured to the base for encompassing and supporting a vertical cylindrical electrode, is formed by rolling from a thick copper sheet which has first been drilled with a plurality of intersecting deep holes. The plate is drilled when flat and then bent to horseshoe configuration, the holes being filld with sand to keep their shape during bending. Plugs are then inserted to block the intersections of certain of the holes but to leave a single circuitous passageway through the bowl, for the passage of cooling water.

Abstract: The method of making a propeller and fan blading comprised of an extruded airfoil having a rib retained at the root for mounting and with a portion thereof removed by flattening the back of the blade truncating the back camber thereof in a plane tapered toward the blade tip with respect to the front camber thereof and having a flap of full configuration toward the root of the blade and continuing tangent from the front camber and extending angularly back from the back camber and reduced toward the blade tip by profiling the trailing edge made thin toward said tip by a flattening truncating the back trailing portion of the blade toward said tip.

Abstract: Method for producing an extrusion die and resulting die for making a honeycomb structure provided with axially extending separate passages. Feed passages and interconnected pooling slots are formed in a metallic die body respectively from opposed end surfaces so as to be communicated with each other. A metallic plate is secured to the end surface provided with the interconnected pooling slots and formed in that plate to communicate with the pooling slots are narrower interconnected extrusion slots having the same shape and size as those of walls of the desired honeycomb structure.

Abstract: Method for producing an extrusion die and resulting die for making a honeycomb structure provided with axially extending separate passages. Feed passages and interconnected pooling slots are formed in a metallic die body respectively from opposed end surfaces so as to be communicated with each other. A metallic plate is bonded as by brazing to the end surface provided with the interconnected pooling slots and formed in that plate to communicate with the pooling slots are narrower interconnected extrusion slots having the same shape and size as those of walls of the desired honeycomb structure. Before securing the metal plate to the end surface, holes are made either in the plate or in the end surface, or both, to increase the bonding contact area therebetween.

Abstract: An airless spray nozzle comprising a nozzle adapter and a hard, abrasive resistant nozzle tip. The nozzle tip is sealingly brazed within an axial passage of the adapter and is mechanically locked against hydraulic pressure ejection from the adapter by lips formed on the adapter and swaged over the tip. The nozzle adapter is manufactured by a series of machining steps which includes trepanning a recess into the front face of the adapter and then subsequently straddle milling the front face to simultaneously form protective ears on the front face of the nozzle and the lips for mechanically locking the tip into the adapter. After assembly of the nozzle and tip, an outlet orifice is machined into the tip by passing a cutter grinder wheel between the spaced ears and the spaced lips on the front face of the adapter.

Abstract: A novel locking apparatus is provided for use on self-aligning rod end couplers, reciprocating machines, hydraulic cylinders, transfer machines, and the like. The apparatus comprises at least one slot in an end face of an outer body and means for uniformly deforming a wall of the slot so as to obtain a uniform deformation of the wall of an annular bore, thereby locking and clamping the outer body upon an annular body engaged within the annular bore.

Abstract: An arrangement for removing excess material from an object surface, to provide a desired finished surface. Holes are drilled into the object so that the bottoms of the holes lie on the desired finished surface. The holes have a shape so that the observed hole diameter at the prevailing surface of the object is dependent on the hole depth and thereby dependent on the amount of material remaining to be removed between the prevailing surface and the desired finished surface. The prevailing surface is continuously observed and measured, and the depths of material to be removed in a sequence of steps is calculated dependent on the measurements of the prevailing surface and the coordinates of the desired finished surface. As a result of the calculations, the depth of material removed during each step is controlled, so that upon carrying out a sequence of such steps, the surface exposed on the object after the last step has been carried out, coincides with the desired finished surface.

Abstract: A gimbal assembly for carrying a gyroscope rotor for spin about a z axis is described which has an inner boss (3), and outer ring (6), first and second gimbal frames (4 and 5) situated between the two, first outer pivots (8) pivoting the first frame (4) to the outer ring (6) about a y axis, second outer pivots (10) pivoting the second frame (5) to the outer ring (6) about an x axis, first inner pivots (11) pivoting the second frame (5) to the boss (3), and second inner pivots (9) pivoting the first frame to the boss (3) about the x axis, the gimbal frames (4 and 5) being interlaced one with another.A preferred method of forming the inner boss (3), the outer ring (6), and the gimbal frames (4 and 5) from a billet of solid material is also described.

Abstract: A mobile machine mounted on a track for advancement therealong for removing irregularities from the surfaces of the rail heads comprises a machine frame, a tool carrier vertically adjustably mounted on the machine frame and arranged thereon for guidance along a respective track rail, and a cutter head on the tool carrier. The cutter head has a cutting tool capable of machining the surface of the head of the respective track rail continuously upon advance of the tool carrier along the track rail.

Abstract: A die for extruding a honeycomb structural body for a catalyst support, which catalyst removes harmful gases in exhaust gas, composing of an integral metal block provided with(a) one surface provided with a plurality of circular perforated holes A having a given depth and a given pattern and a grid-formed slits conforming to a cross-sectional shape of a honeycomb structural body to be extruded and(b) another surface provided with a plurality of perforated holes B having a given depth and a given pattern,said slits connecting to the holes B, having a smaller width than a diameter of the holes A and passing through center of the holes A. Said die is manufactured by providing the slits after perforating the holes A.

Abstract: In a machine for cutting grooves of a given pattern through a blank with a fret saw blade, openings for receiving the fret saw blade at the cutting starting points of the grooves are determined such that the center of each opening is positioned at a point spaced from a cutting start point by a distance equal to one half of the width of the fret saw blade in a direction opposite to the direction of cutting the groove.

Abstract: An elbow type of fluid fitting and method for chucking for machining same wherein the fitting includes a body having a pair of fitting branches extending outwardly thereof angularly of each other. The body also includes a gripping boss extending a short distance outward thereof oppositely from one of the branches and substantially coaxial therewith. This boss facilitates chucking of a fitting blank at three separate spaced apart locations for subsequent machining and processing into the finished fitting. One of these locations is at the one branch adjacent the body and the other location is at the gripping boss to provide an increase in stability of the fitting blank during machining.

Abstract: A monolithic two axis gimbal suspension system for a tuned inertial instrument includes flexure hinges which are formed monolithically integral therein to define the pivot axis of the suspension system, each monolithically integral flexure hinge having aligned pairs of skew, crossed bridges integral with the relatively rotatable gimbals of the suspension system. The suspension system is used in a dry tuned gyroscope to suspend the gyro rotor from the gyro spin shaft. A method for making the monolithic suspension system comprises electro discharge machining of a monolithic workpiece mounted on a movable mandrel. Monolithically integral flexure hinges comprising skew, crossed bridges formed therein, interconnect gimbal portions which are formed in the workpiece. Construction of an improved tuned gyroscope employing the monolithic suspension system in a single compartment housing is described.

Abstract: A method for manufacturing a contoured die wherein a workpiece is formed with depressions extending across the top surface of the workpiece from front to back thereof. The depressions are formed spaced apart from one another to retain flat top surface portions therebetween. Smoothly contoured edge surfaces are then formed on the workpiece in the regions of intersection of the top surface with the front and back surfaces, to produce a die with ridge projections surrounded by top surface portions having a concave elevational contour as viewed in a vertical plane perpendicular to the side surfaces of the workpiece.

Abstract: A thin film, cylindrical resistor is disclosed which exhibits non-inductive characteristics and which may be fabricated easily and economically. A cylindrical insulative substrate is provided with electrically conductive termination bands and a thin coating of electrically resistive material over the entire cylindrical surface. The resistive material is then cut along an axial path and along an interrupted spiral path so as to form the resistive material into a serpentine path along the cylindrical substrate. Leads are attached to each end and as the current traverses the length of the cylinder it travels in a serpentine path. The current travels in opposite directions along adjacent parallel portions of the path thereby cancelling out the major portion of inductance.

Abstract: A process for sealing the exposed aluminum core of a workpiece formed of stainless steel clad aluminum material of the type in which sheets of stainless steel are bonded to the opposite side of an aluminum core to form a stainless steel skin on each side thereof. In the first step of the process, one side of the stainless steel skin (24) and substantially all of the aluminum core (14) are skived off below the exposed edge (22) of the workpiece along a cut (26). The cut (26) in the aluminum core is then ground into the shape of a convex meniscus (30). In the third step, the skin (24) on the skived off side, which extends above the meniscus (30), is rolled inwardly over the meniscus (30) and in the fourth step, the unskived skin (28) is rolled inwardly over the meniscus, thereby completely sealing the aluminum core.

Abstract: A manufacture of uniformly sized doors for the compartments of safe deposit box nests comprises punching the lock nose holes in uniformly oversized door blanks and then using those holes as the reference from which the various operations on the edges and rear faces of the blanks are performed. For the latter purposes the blanks are supported in a vertical position upon special moving workholders which engage and position the blanks by means of reciprocating draw bars which extend through the nose holes. In cooperation with other apparatus, the draw bars releasably clamp the blanks in position while various machine operations are serially performed on the blanks as the workholders pause at successive tool stations.

Abstract: A one-piece collet for use in machine tools, which collet comprises a rear portion which is cold worked to provide a bore of smaller diameter than the bore of the central portion of the collet, which reduced bore is threaded. The cold working of the rear portion produces a transitional area between the different sized bores of the rear and central portions which is characterized by a smooth, uniform grain flow, with unbroken flow lines, resulting in increased tensile strength and longer fatigue life of the collet. The front portion of the collet may also be cold worked to provide a similar transitional area between the central portion of the collet and the reduced bore of the front portion of the collet.

Abstract: A spark wheel blank is provided with spaced helical grooves and lands or the like, as in a conventional threading or knurling operation. The blank so prepared is forced coaxially through the bore of a broaching die having a plurality of circumferentially spaced cutting surfaces which cut spaced notches across the lands to form a plurality of axially and circumferentially spaced teeth on the blank. The spark wheel thus formed is then subjected to an additional broaching step to remove portions of the teeth formed in the first broaching step, providing sharpened teeth for improved sparking performance.

Abstract: A method for chemically milling sheet metal to form three-dimensional objects comprising masking the sheet metal by selectively applying a resist material to opposite sides of the sheet metal to form a design, applying an etchant to the masked metal which erodes the metal according to the design, and simultaneously forming connecting tabs and score lines. The tabs and score lines allow certain design portions to be bent to different planes to form the three-dimensional object.

Abstract: Disclosed is a piston ring including a spacer-expander spring member. In a preferred embodiment the ring is of cast iron and includes two axially spaced cylinder wall contacting lands. At least one generally rectangular inwardly facing spring receiving recess is formed in the interior wall of the ring to receive the spring member which is formed from a flat strip of metal in a "U" configuration with the legs thereof facing outwardly, preferably aligned with the lands on the ring. A plurality of slots are provided in the spring member dividing the periphery into a plurality of feet. In a preferred embodiment the feet are radiused as seen in plan view to a radius less than the radius of the pocket in which they fit. This has been found to reduce wear in the spring receiving groove and to reduce the tendency of the ring and spring to become united which is detrimental to performance and is a common problem in rings of this general type.

Abstract: A method of manufacturing a stylus by modifying a square post shaped diamond element is disclosed. A tip having a conical surface is ground at one end of the diamond element. An electrode bearing surface is formed in the region of the tip such that the angle subtended by the electrode bearing surface with the axis of the element is not less than the angle included between the conical surface and the axis. A record engaging surface substantially orthogonal to the electrode bearing surface is formed in the tip region such that the two surfaces intersect along a line substantially perpendicular to the stylus axis. A thin layer of conductive material is deposited on the electrode bearing surface to form a stylus electrode.

Abstract: A process for obtaining propellant samples from case bonded motors compri the use of electrolytic machining to remove two narrow bands of the case to expose the propellant liner, severing of the sample section from the rocket motor by means of a piano wire cutter, and removal of the propellant sample by means of a spool type piano wire cutter.

Abstract: A method of forming an isostress-contoured die from a metal workpiece by discreet, sequential machining steps. A plurality of spaced-apart truncated conoidal projections, arranged in repetitive diamond-shaped patterns, are formed from the workpiece. Depressions are machined in the workpiece portions associated with each diamond pattern and the ridges between adjacent depressions are reduced by machining to form isostress-contoured surface portions between and surrounding the projections.

Abstract: Method of producing variety of golf club shafts from universal blank shaft of given length includes steps of determining actual natural frequency of blank shaft. Selected amounts of shaft length are then removed from both tip and butt end portions of blank in correlation with natural frequency of blank. Total amount removed from blank solely depends upon length of shaft desired while selected amounts removed from tip and butt end portions of blank solely depend upon natural frequency of shaft desired. As proportional amount removed from tip portion increases, frequency of produced shaft also increases. Conversely, as proportional amount removed from tip portion decreases, frequency of produced shaft also decreases.

Abstract: A fuel injection valve having nozzle bores which are inclined with respect to the axis of the valve. The nozzle bores are similar to Laval nozzles. An auxiliary bore is provided in the axial extension of the nozzle bore to be prepared in the nozzle body for machining the nozzle bore. This bore is sealed by means of a pressed in, soldered, or electron beam welded stopper.

Abstract: A method of manufacturing brake drums or the like and apparatus therefor that minimizes scrap rates by improving as-manufactured balance. In accordance with the disclosed method, the casting rim of the brake drum is located in a press by centering the drum relative to its outer surface. Locating holes are then accurately formed in the drum center by the press prior to machining of the drum inner surface. The subsequent machining operation on the drum inner surface is accomplished by locating the drum accurately via the locating holes formed in the press operation.

Abstract: A rotary turret numerically controlled punch press is provided with a discharge station at 90.degree. from a punching station. A part is clamped in the turret, separated from a larger workpiece and then rotated with the turret to the discharge station. A transfer arm is slaved to the NC punch press and engages the part at an exact attitude and position relative to a reference point on the part and transfers the part to a rotary chuck. The part is placed in the chuck at an exact attitude and with the reference point at the axis of rotation of the chuck.Four rotary chucks are provided on a rotary turret contouring apparatus. The turret is rotated 90.degree. to position the part at a cutting station.A band saw is provided with rotary guides for changing the angle of the saw. While the part is rotated and linearly translated toward and away from the saw by the contouring apparatus, the saw cuts a peripheral shape on the path with the blade changing its angular attitude where necessary.

Abstract: This invention is for two probe hose connector fittings for tapping beer kegs that have a keg fitting with check valves for preventing flow of beer and gas until the probes are pushed down into position to open at least the beer valve. The probes are tubes, and in the prior art such tubes were cut diagonally across their lower end portions to form a valve engaging surface. This surface at the lower end of the tube was merely the end face of a part of the circumference of the tube and easily damaged because of its lack of inherent strength. The present invention makes the probes from bar stock and provides a construction that provides ample open area over part of its cross section for the flow of beer.

Abstract: This method is particularly suited for practice on a multiple spindle screw machine in which each work spindle carries a length of bar stock. The work end of each bar is formed, sized and drilled in a conventional manner to form thereon a wheel shaped workpiece which is then rotated between two thread dies to form diagonal grooves in its periphery. The work is then subjected to two successive broaching operations which cut grooves transversely of the lands formed by the threading dies. When the work has entered the bore of the second broaching tool, the tool is rotated slightly relative to the work to upset the teeth so that their sharp cutting edges are caused to face outwardly.

Abstract: Method for making isostress contoured dies by providing a cavity containing multiple vertical supports. A flexible material is tensionally secured across the top of the cavity to contact the supports and pneumatically deformed to assume an isostress contour. A form setting material is deposited and cured against the isostress contoured flexible material. The cured material may then be used directly as a die or as a die-forming master pattern.

Abstract: A boring tool for woodworking, and more particularly, a method of manufacturing the cutter head from a blank of cylindrical tool steel bar stock. The opposite ends of the cylindrical blank are turned to the desired radius for the cutter head, a transverse internally threaded recess is provided along a diameter of the blank at its mid-length, and the blank is machined to provide a central hub surrounding the recess with oppositely directed radial arms extending therefrom. The surface of the blank opposite the recess is faced to provide cutting edges, and a shank and lead screw are fixed in the recess.

Abstract: An article and a method for manufacturing the same, for use as a jaw face of a vise and which applies pressure evenly along any approximately flat surface clamped therein. The face comprises a plurality of cantilevered beams integral with the body of the jaw. The beams are spaced apart from each other and in the preferred embodiment have along a corresponding exterior surface of each, a pair of projections the tips of which are tangent to a geometrically flat plane. When the jaw is used, the projections bear against a flat surface of the workpiece to be clamped and the individual beams deflect slightly to correct for deviations from flatness in the flat surface, thereby assuring that the clamping force is distributed relatively evenly along the surface. A preferred method for manufacturing this article comprises the making of a plurality of cuts perpendicular to the jaw face of a block, which carries the projections.

Abstract: The method of and apparatus for the production of bars or machine wire from alloys of aluminum or copper by continuous casting of the rough shape in a grooved casting wheel closed by a band or chain and the subsequent steps of rolling and scalping the rough shape in a series of successive operations.

Abstract: A ring comprising separable segments especially for seating against a rotary seal and a method of manufacturing such a ring which comprises forming and assembling the segments into the ring, clamping the ring segments together, e.g. by bolts, forming at least one tapered passageway in the ring across each joint between mating segments and inserting a tapered pin into the tapered passageway to hold the segments against relative sliding movement before a finishing operation is performed on an end face or the bore of the ring so that such end face or bore can act as an effective rotary seal.

Abstract: In the weight correction of workpieces prior to finish-machining, such as connecting rods, the dimensions of the pre-machined surfaces are measured and employed as a factor in the adjustment of the machine tool for weight correction of the workpieces, for example, by machining material off or adding material onto the workpiece, so that the workpiece will have the desired weight characteristics after final machining.