Abstract: The present invention is intended to provide a method for manufacturing a resin gear with a core metal by which there is no reduction in strength even with gates allowing decrease in material costs such as pin gates in the molding die for injection molding. The manufacturing method includes: gates at a primary molding step and gates at a secondary molding step are pin gates or the like. The number of the gates at the primary molding step and the number of the gates at the secondary molding step are plural and identical, and the gates are arranged circumferentially. Gate positions G21, . . . at the secondary molding step are circumferentially intermediate or nearly circumferentially intermediate between gate positions G11, . . . and weld positions W11, . . . adjacent to the gate positions G11, . . . in the primary molded article.

Abstract: A wheel, in particular a counting wheel for a meter, includes a bearing bush and a wheel rim. The bearing bush and the wheel rim are produced from different materials. The bearing bush and the wheel rim can move relative to one another in the rotational direction through a guide having complementarily corresponding guide elements on the bearing bush and the wheel rim extending continuously in the circumferential direction of the counting wheel.

Abstract: A sintered pulley may include a body of a metal alloy and configured with a substantially annular shape. The body may include a first face of contact with a crankshaft, a second face of contact with a securing element, and a concentric hole for associating the pulley with the crankshaft. The second face of contact may have a region of a point of contact with the securing element disposed proximate to the hole. The region of the point of contact may have a density of between 7.3 and 7.5 g/cm3.

Abstract: A structural or support ring for an overmolded pulley, the ring placed between a bearing and outer radial surface of the pulley, providing structural support across a width of the pulley.

Abstract: A chain or belt drive assembly, including: a first sprocket with: a first plurality of radially outwardly extending protrusions; and at least one opening passing through material forming the sprocket and wholly surrounded by the material forming the first sprocket; and a second sprocket including a second plurality of radially outwardly extending protrusions, The assembly includes a continuous chain or belt engaged with the first and second pluralities of protrusions; and at least one pendulum mass assembly including: a first pendulum mass disposed on a first radial side of the first sprocket; second pendulum mass disposed on a second radial side, opposite the first radial side, of the first sprocket; and at least one connection element fixedly secured to the first and second pendulum masses and passing through the at least one opening. The connection element is displaceable within the at least one opening in radial and circumferential directions.

Abstract: Low-noise pulleys and methods of constructing low-noise pulleys are disclosed. In a first aspect, first and second pluralities of arms extending radially outward from the outer hub to the outer rim are angularly offset from each other about the axis of rotation to eliminate symmetry across the lateral midline of the pulley. In a second aspect, the radially outermost ends of a plurality of arms are arcuately spaced apart according to a pitch sequence describing a pseudo-random pattern of relative spacings so as to reduce or eliminate rotational symmetry of the pulley. In a third aspect, features of the first and second aspects are combined, and in one embodiment, first and second pluralities of arms are, respectively, approximately oppositely canted so as to vary the arcuate spacings of the laterally outermost ends of the arms.

Abstract: A device and method are provided for forging sleeve-shaped parts such as pistons. The device includes a form with: an upper form mandrel (C); an outer form ring (A); a lower form mandrel (B); an ejector device with an upper ejector (G) for ejection through the upper form mandrel (C); a lower ejector (H) for ejection through the lower form mandrel (B). Optional support devices for the form include a lower reinforcement ring (D) for the lower region of the outer form ring (A), a form mandrel housing (F) for the upper region of the outer form ring (A), and a clamping base (E) to support the lower form mandrel (B), by means of which the lower ejector (H) may be operated. The device and method advantageously facilitates the manufacture of pistons having a long skirt length and a minimal wall thickness.

Abstract: A sheet metal-made cup-shaped material including a circular base plate portion and a cylindrical portion extends from an outer peripheral edge portion of the base plate portion in one direction along the axis of the base plate portion. An annular groove is formed in an upper end portion of the cylindrical portion, whereby an annular projection that projects in a direction opposite to a direction along which the cylindrical portion extends is formed in the cylindrical portion. The annular projection and the cylindrical portion are clampingly pressed to a degree at which the annular groove at least disappears, whereby the outer circumferential face of the projection and the outer circumferential face of the cylindrical portion are flush with each other. Therefore, the axial length of a sheet metal-made back face pulley is increased, and the whole of the increased axial length can be used as the effective length.

Abstract: A method for mounting one or more ropes on a rope pulley includes fitting a first end of the one or more ropes into one or more corresponding rope grooves of the rope pulley, attaching a rope holder to the rope pulley to press the first end of the one or more ropes into the one or more corresponding rope grooves of the rope pulley, and winding the one or more ropes at least partially around the rope pulley by rotating the rope pulley.

Abstract: A process for producing a pulley for a belt drive CVT, including subjecting tapered surfaces of a preform of at least one of input and output pulleys to surface hardening, subjecting the surface-hardened tapered surfaces of the preform to hard turning to form microgrooves radially spaced from one another thereon, between which microprojections are formed, and reducing a height of the microprojections. Alternatively, a process for producing a pulley for a belt drive CVT, including subjecting tapered surfaces of a preform of at least one of input and output pulleys to surface hardening, subjecting the surface-hardened tapered surfaces of the preform to shot peening, and subjecting the shot-peened tapered surfaces of the preform to finishing to form microgrooves having a substantially equal pitch thereon.

Abstract: A resin molding material for making pulleys containing a novolac type phenolic resin, a glass fiber, an inorganic substrate other than the glass fiber, and an elastomer is described. The novolac type phenolic resin, ranges from 25% by weight to 45% by weight, the glass fiber together with the inorganic substrate other than the glass fiber ranges from 45% by weight to 65% by weight, and the elastomer ranges from 0.5% by weight to 5% by weight, relative to the entire molding material and are blended together. As the inorganic substrate other than the glass fiber, for example, calcium carbonate is used. As the elastomer, for example, NBR is used. The phenolic resin molding material is molded to obtain a resin pulley.

Abstract: A rotary component with a rotor having a plurality of teeth arranged around the perimeter of the rotor. Each tooth has a crown and each pair of adjacent teeth has a valley therebetween. The crowns of the teeth lie on a curved envelope forming the perimeter of the rotor. The perimeter of the rotor has a non-circular profile with at least two protruding portions alternating with receding portions, in which the distance between the midpoints of the crowns of each pair of adjacent teeth is substantially the same, the profile of the valley between each pair of adjacent teeth is substantially the same, and the distance between the midpoint of each crown and the axis of the rotor varies around the perimeter to produce the said non-circular profile.

Abstract: A method of forming a metal matrix component and product that comprises forming scrap sheet metal material, shredding the scrap sheet metal material to a predetermined size range, filling the shredded scrap sheet metal material into a compacting die, adding an adhesive material to the shredded scrap sheet metal material in the compacting die, compressing the shredded scrap sheet metal material and curing the adhesive to form a metal matrix component. The product comprises an inertia ring that may be used in a crankshaft damper.

Abstract: Sheave surfaces 11a to 14a of a primary pulley 2 and a secondary pulley 3 contacting a V-belt 4 which is looped around the pulleys 2, 3 are provided with an initial wear height at which a reaction film between the V-belt 4 and the sheave surfaces 11a to 14a does not become worn and a sufficient oil keeping depth to promote generation of the reaction film such that metallic contact does not occur between the sheave surfaces 11a to 14a and the V-belt 4.

Abstract: A method of manufacturing a non-circular drive element includes the steps of providing a hub having a non-circular profile. A ring is provided having a generally circular profile. An outer surface of the ring has a drive configuration. The ring is force fitted over the hub in a manner that transfers the non-circularity of the hub to the ring. Additionally, a drive element has a hub having a non-circular profile and a circular ring force fitted over the hub.

Abstract: The over-running clutch pulley (10) of a preferred embodiment of the invention includes a sheave member (20), a hub member (22) located substantially concentrically within the sheave member, and a clutch member (24), which cooperate to rotationally engage an input device (12) and an output device (14). The sheave member preferably includes a sheave input section (26) adapted to engage the input device, and a sheave clutch section (28) defining a sheave clutch surface (30). Similarly, the hub member preferably includes a hub output section (32) adapted to engage the output device, and a hub clutch section (34) defining a hub clutch surface (36). In the preferred embodiment, either the sheave clutch surface, the hub clutch surface, or both, have a surface microhardness greater than the hub output section.

Abstract: A pulley is made by fixing an edge of an opening of a plate by using a first upper mandrel ring installed at a lower end of a first supporting pin of a first forming device. A supporting block disposed around an upper end of a first spindle is rotated with the first spindle. An inner hub of the pulley is formed by inwardly pressing an upper surface of the plate against a first pressing roller to reduce the thickness of the plate while drawing the plate around a first mandrel ring. The plate is fixed to a second spindle of a second forming device, so the plate rotates with the second spindle. An outer hub is formed by pressing a convex bead toward the inner hub by using a fourth pressing roller and by drawing the outer hub.

Abstract: A method of making an interposer having an array of contact structures for making temporary electrical contact with the leads of a chip package. The contact structures may make contact with the leads substantially as close as desired to the body of the chip package. Moreover, the contact structures can be adapted for making contact with leads having a very fine pitch. In a first embodiment, the contact structures include raised members formed over a body of the interposer. A conductive layer is formed over each of the raised members to provide a contact surface for engaging the leads of the chip package. In another embodiment, the raised members are replaced with depressions formed into the interposer. A conductive layer is formed on an inside surface of each depression to provide a contact surface for engaging the leads of the chip package. Moreover, any combination of raised members and depressions may be used.

Abstract: The invention relates to a method for producing a torsional vibration damper housing, especially the housing for a viscosity torsional vibration damper, whereby the damper housing is manufactured from an existing plate circular blank and the shaping of the damper housing occurs in an impact extrusion machine during a non-cutting impact extrusion shaping method. In successive impact extrusion shaping steps, all parts of the damper housing protruding from the plane of the plate circular blank, which forms the housing rear wall, are impact extruded while reducing the wall thickness of said parts to form a one-piece damper housing. Said damper housing is structured such that the area of the fastening flange has the largest thickness.

Abstract: A crankshaft damper and a method of crankshaft damper assembly using interlocking beads. A crankshaft damper having a hub portion and pulley ring and an elastomeric member disposed in an annular space between them is clamped in a tool after initial assembly. A tool having jaw teeth on oppositely disposed, cooperating jaws engages the crankshaft damper hub portion and pulley ring on either side of the elastomeric member. The tool jaws press on the hub portion and pulley ring to create beads or crimps on the hub portion and the pulley ring. The beads or crimps are formed in cooperating groups or sets. They press the elastomeric member into the form of a curve or wave. The curve or wave mechanically locks the hub portion and pulley ring together, thereby locking the elastomeric member in place between them.

Abstract: A cog belt pulley defining an axis of rotation having an outer circumferential surface oriented about the axis of rotation and including a plurality of teeth for engagement with at least one cog belt. The pulley is distinguished in having at least one flange segment radially extending from the outer circumferential surface. Each flange segment projects about a fraction of the circumferential surface and is located on an individual plane. The at least one flange segment is arranged for enabling a cog belt to be configured onto the pulley without interfering with the at least one of the flange segment.

Abstract: The present invention relates to a disc-shaped material made from metal sheet, provided for the manufacture of a pulley or the like. According to the present invention, even if the metal sheet is thin and light weight, a peripheral wall of sufficient strength can be formed, by the following steps: rotating the material held between a pair of dies and pressing an outer periphery of the material by means of a forming roller, in a radially inward direction, thereby thickening axially the outer periphery of the material to be extended to both sides of a non-processed portion, thus forming the peripheral wall.

Abstract: A pulley is made by fixing an edge of an opening of a plate by using a first upper mandrel ring installed at a lower end of a first supporting pin of a first forming device. A supporting block is disposed around an upper end of a first spindle and is rotated with the first spindle. An inner nub is formed by inwardly pressing an upper surface of the plate against a first pressing roller to reduce the thickness of the plate while drawing the plate around a first upper mandrel ring. The plate is fixed to a second spindle of a second forming device, so the plate rotates with the second spindle. An outer hub is formed by pressing a convex bead toward the inner hub by using a fourth pressing roller and by drawing the outer hub.

Abstract: A method of designing and manufacturing a probe card assembly includes prefabricating one or more elements of the probe card assembly to one or more predefined designs. Thereafter, design data regarding a newly designed semiconductor device is received along with data describing the tester and testing algorithms to be used to test the semiconductor device. Using the received data, one or more of the prefabricated elements is selected. Again using the received data, one or more of the selected prefabricated elements is customized. The probe card assembly is then built using the selected and customized elements.

Abstract: A method of designing and manufacturing a probe card assembly includes prefabricating one or more elements of the probe card assembly to one or more predefined designs. Thereafter, design data regarding a newly designed semiconductor device is received along with data describing the tester and testing algorithms to be used to test the semiconductor device. Using the received data, one or more of the prefabricated elements is selected. Again using the received data, one or more of the selected prefabricated elements is customized. The probe card assembly is then built using the selected and customized elements.

Abstract: A sintered, flanged cam pulley includes a sintered cam pulley body and an annular flange caulked to the sintered cam pulley body. The sintered cam pulley body has at an end portion thereof an axial annular projection and a stepped portion formed on an outer periphery side of the annular projection. An inner peripheral surface of the annular flange is fitted on the stepped portion of the sintered cam pulley body. The tip of the annular projection is deformed plastically from the inner to the outer periphery side of the annular projection by a caulking roller. The caulking roller has a first conical surface of a large angle and a second conical surface of a small angle contiguous to the first conical surface, the first and second conical surfaces being formed on an outer peripheral surface of the caulking roller. The annular flange is thereby caulked to the sintered cam pulley body.

Abstract: A gear part and method is provided for forming a gear part, in which a circular blank-like workpiece is fixed in a flow-forming machine in a radially inner area, the circular blank-like workpiece is rotated, at least one roller is substantially radially moved, in which during the radial moving in workpiece material flows radially, so that the workpiece wall thickness is reduced in this area, in a central area of the workpiece a boss is formed and during radial moving in the roller is increasingly axially infed. The method also relates to forming a gear part in which the circular blank edge is thickened by at least one forming roller, the shaping of the circular blank edge taking place through the contour of gripping jaws and/or the forming roller and the cross-section of the circular blank edge is formed in an approximately rectangular manner.

Abstract: A method for manufacturing a V-block of a metal belt type continuously variable transmission is provided. The V-block is formed by punching a V-block press material with a main punch and a counter punch. The V-block press material has a sectional view including an outer portion of about uniform width and a tapered inner portion with a slant gently inclined toward an innermost end of the material from a place distant from a rocking edge by a predetermined distance inward. The main punch and the counter punch have front shapes of the substantially same as that of the V-block, and either punch facing the rocking edge has a slant starting at a place corresponding to the rocking edge and extending inward rising gradually.

Abstract: A method for forming a hub having blind bore is provided. The blind bore hub is formed integrally with a solid circular disc by displacing metal radially inward from the upper surface toward the center of the disc to form a hub, and then punching a bore opening through the center of the hub to provide a blind bore therein. A blind bore hub formed by the foregoing method is also provided.

Abstract: The device for assembling a push V-belt for a continuously variable automatic transmission wherein the push V-belt consists of a plurality of push elements (1) movably interconnected that form an endless belt and of two ring sets (2, 2′) has a centering ring (3) for lodging the first ring set (2) and fixing the individual push elements (1) and a circular ring (4) upon the lodged push V-belt and externally partly surrounding it, the ring having an inner outline adapted to the appertaining outer outline of the push V-belt so that a radial force acts upon each individual push element (1) in direction to the axle that traverses perpendicularly to the radial plane the central point of the circle formed by the push V-belt.

Abstract: The present invention provides a method of manufacturing a poly-V pulley made of metal sheet, which can be easily produced from a thick flat-plate material. By this method, the poly-V pulley is formed to have a two-part arrangement of poly-V grooves having different diameters, i e., a small diameter and a large diameter. A circular flat-plate material having a boss portion at the center thereof is bent, thereby forming a first forming body whose section is dish-shaped. The first forming body includes a supporting base and a conical peripheral portion consecutively disposed so as to be inclined and widened from the outer peripheral end of the supporting base portion in the outward direction. Next, the conical peripheral wall is extended in the widening end direction so as to decrease the thickness thereof, thereby forming a second forming body whose section is also deep dish-shaped.

Abstract: The present invention provides a method of producing a poly-V pulley which can economically produce a poly-V pulley of the type that is to be inserted and coupled onto a shaft via a one-way clutch or a bearing, the number of steps being as small as possible. A trunk is obtained by cutting a thick pipe blank into a fixed dimension. Thereafter, first and second preliminary ears are projectingly formed in the axial ends on the outer peripheral face of the trunk by pressing in which the axial end faces of the trunk are clamped between upper and lower dies respectively having annular wedge-like projections, and the wedge-like projections bite the axial end faces of the trunk. The first and second preliminary ears are shaped into first and second ears by rolling of a predetermined shape, and poly-V grooves are thereby formed.

Abstract: A traction sheave for driving synthetic fiber ropes, preferably of an elevator installation, ensures a consistently good selected tractive capacity that is largely independent of external influences which reduce friction. At least part of the rope running surface on the traction sheave is provided with a selected roughness grade of N7 to N12. The selected roughness grade on the running surface is formed either by mechanical machining or by use of a suitable coating, preferably a plasma coating of corundum. For example, only the bed of the rope groove, the area of the flanks of the rope groove, or a wide area of the surface of the rope groove can be of the selected roughness grade. By correspondingly suitable arrangement of these differently formed rope grooves on the traction sheave, a desired tractive behavior can be systematically effected.

Abstract: A process for making a removably interlockable connector assembly that includes a first connector having a head on a mesa and a second connector having an opening that receives the head on the first connector. The head on the mesa of the first connector and the material defining the opening in the second connector are flexible and sized, so that the head on the mesa of the first connector and the material defining the opening in the second connector flex as the head on the mesa of the first connector is inserted into the opening in the second connector. The head on the mesa of the first connector is formed by selectively etching portions of a first pad layer through openings in an etch resistant layer.

Abstract: An annular groove portion is formed between portions corresponding to groove portions and thereafter the groove portions are formed while the annular groove is pressed. Consequently, since the stress produced due to a plastic deformation in forming the groove portions can be absorbed by the annular groove having a smaller rigidity than the groove portions, no undesirable plastic deformation of the groove portions occurs and hence the accuracy of the finished size of the multi-stage pulley can be improved. Furthermore, the capital investment in groove forming rollers can be reduced and the manufacturing cost of the multi-stage pulley can be reduced.

Abstract: A sliding key slidable in an axial direction of a rotary shaft and engaging a sliding cylinder such that the sliding key follows a rotation of the sliding cylinder. The sliding key is a molded product of a metal-molded part and a resinous part. The sliding key does not malfunction or fail when it is used in an environment of a high temperature and a high load.

Abstract: A pulley useable with a driving belt in a continuously variable transmission, including a moveable pulley half having an integral cylinder portion integrally formed therewith by plastic working. The moveable pulley half includes an axially extending hollow shaft portion, a radially outwardly extending flange portion having a contact surface frictionally contacted with the driving belt, and the integral cylinder portion axially extending at near an outer peripheral portion of the flange portion. The plastic working includes forming a workpiece, machining the workpiece, spinning the workpiece to form the integral cylinder portion, heat-treating the workpiece and finishing the workpiece to complete the moveable pulley half.

Abstract: A trunnion (3) of a toroidal continuously variable transmission comprises a pulley (38) having a pulley groove (30) and a notch (37) crossing the pulley groove (38). The trunnion (3) rotates in synchronism with another trunnion by looping an endless wire around the pulley groove of each trunnion (3) and by engaging a large diameter part of the endless wire with the notch (37). After the trunnion (3) is formed by die forging, a rotary tool (90) is first aligned with a boundary interface (31′A, 31′B) between the pulley groove (30) and notch (37). The tool (90) is then rotated while it is moved forward in the axial direction of the tool (90), and the boundary interface (31′A, 31′B) is cut to a predetermined position.

Abstract: A disk material is plastic-formed to form an inner cylindrical portion of a rotor and a cover member which covers an end side of the rotor. After that, the disk material is slit inwardly from an outside thereof in a radial direction of the disk material to form an outer cylindrical portion of the rotor and a pulley corresponding portion which will be the pulley. Finally, the pulley corresponding portion is plastic-formed to form a pulley groove. Thereby, even when the location of the pulley relative to the outer cylindrical portion are different, same processes can be applied to these different type pulley integrated rotors until the disk material is slit. That is, many different type pulley integrated type rotors can be manufactured with low cost while maintaining high concentric accuracy between the pulley and the rotor.

Abstract: A sheet metal pulley has a base part and a cylindrical peripheral wall for winding a belt formed integrally with the base part. An ear is disposed in an end part of the cylindrical peripheral wall. The base part is partitioned into an inner peripheral portion and an outer peripheral portion, with the inner peripheral portion being smoothly connected with the outer peripheral portion through a bent part. The outer peripheral portion is formed into a tapered shape which extends from the bent part and has a diameter which is increased toward the inner side of the cylindrical peripheral wall in the axial direction of the pulley. The outer peripheral portion connected with an end part of the peripheral wall on the side of the ear. Even when the pulley is used for a long term, the connecting portion between the peripheral wall and the base part, etc. is hardly cracked.

Abstract: Disclosed is a pulley that comprises a metal bearing with an elastomeric material on its outer rim molded into a polymeric wheel, where the coefficient of thermal expansion of the polymeric wheel is at least 1.0.times.10.sup.-6 cm/cm/.degree.C. greater than the coefficient of thermal expansion of the metal bearing. The pulley is made by applying an elastomeric material to the outer edge of the metal bearing and molding the polymeric wheel around it. The use of the elastomeric material prevents slippage between the metal bearing and the polymeric wheel.

Abstract: A workpiece W2 is grasped by inserting a first jig into a concave portion which is formed in a rotor forming process, and by interfitting a second jig to a convex portion which is also formed in the rotor forming process. Thereby, the workpiece W2 is firmly grasped, and a groove-forming roller can be strongly pressed into the workpiece W2. A time for forming a pulley groove is shortened, and a manufacturing cost thereof is reduced.

Abstract: The present invention relates to a method of producing a sheet metal pulley for a V belt without cutting which may impair the environment of a factory. A sheet metal pulley for a V belt which is obtained by the production method of the present invention has plural valley portions around which V belts are to be wound. In the production method, an annular first valley portion which is opened in a V-like shape is formed by slitting a root portion of a cylindrical portion of a sheet metal cylindrical member and an outer periphery of a base plate portion continuous to the root portion.

Abstract: A sprocket made of low carbon steel of not more than 0.25 wt % in the carbon content comprising teeth portion which are quenched to a hardness close to the theoretical maximum quenching hardness of 35-55 Rockwell hardness C, and an inside diameter mounting hole.

Abstract: There is provided a method for forming a disc-shaped blank in which a disc-shaped thin plate material is, at an outer peripheral portion thereof, swaged towards an axial side of the plate material with a roll die to thicken the outer peripheral portion and is shaped into a cross-sectional configuration corresponding to that of a dish, the method comprises the steps of: sandwiching and securing between a pair of sandwiching members the disc-shaped thin plate material except for the outer peripheral portion including a swaging portion; swaging the swaging portion projecting from the sandwiching members so that an outermost end of the swaging portion may be shaped into a cross-sectional configuration corresponding to that of an arrowhead while a root portion of the swaging portion has the same thickness as the original thin thickness of the plate material; thereafter, bending the outer peripheral portion including the thick-walled swaged portion at the root portion thereof from one side surface of the disc-shape

Abstract: A ring-shaped flange is molded at one end of a cylindrically-shaped body in a flange molding process. In an edge surface molding process performed after the flange molding process, a cylindrically-shaped body thinner than a hot rolled steel plate, a truncated cone-shaped connecting portion extending in an axial direction from the body, and a smallest diameter portion thinner than the body at the other end of the body are molded. Next, in a slotting process, a slotting punch is driven in from the slanting surface of the connected portion to form the other guide-molded portion, and in a trimming process, the flange is trimmed off in order to remove the unnecessary volume to form a poly V-pulley from the work.

Abstract: Apparatus for holding electrical conductors which includes a body having one or more bores for receiving electrical conductors. Each bore has an axial section having a non-circular cross-section. The bores may be disposed in substantially parallel relationship. Each of the bores may includes a counterbore at one axial extremity thereof to provide space for a weld between electrical conductors disposed in that bore and a chamber at the axial extremity thereof opposite to the axial extremity at which the counter bore is disposed.The invention also includes the method of assembling an assembly having first and second sets of wires or individual conductors that are to be secured together and then held respectively apart thereafter.

Abstract: Disclosed is a method of making a wheel assembly such as a pulley with a bearing. A wheel is molded from a material that shrinks when its temperature falls from a temperature above 100.degree. F. to room temperature. The wheel has a circular opening at its center suitable for holding a circular bearing. The diameter of the circular opening when the wheel is at a temperature above 100.degree. F. is greater than the diameter of the circular bearing and is less than the diameter of the circular bearing when the wheel is at room temperature. The bearing is positioned inside the opening when the wheel is at a temperature above 100.degree. F. The wheel is cooled to room temperature and shrinks around the bearing, thereby fixing the bearing to the wheel. Also disclosed is a wheel assembly made by this method.

Abstract: A one-piece metallic belt driven pulley has a hub, an annular belt engaging wall having an outer belt engaging surface and a radially extending web that connects the hub and belt engaging wall. The hub has an internal bore defined by a tubular inner surface. At least a portion of the tubular inner surface that defines the bore has a plurality of axially spaced threads to form an axially extending threaded portion. In use, the threaded portion of the bore is threaded onto an axially extending thread on an outer surface of the shaft to secure the pulley to the shaft. One end of the hub takes the form of a nut having a hexagonal outer configuration that is adapted to be engaged by a tool for screwing the pulley onto the shaft. The other end of the hub forms an axially extending integral spacer, the end of which is located outwardly of an end surface of the pulley.

Abstract: A power transmission sheave and method of manufacturing such sheave wherein the groove of the sheave incorporates critical dimensions to make it adaptable for use with any of several commercially known grooved sheaves and belts therefor, the sheaves having differing proximal critical dimensions including those relating to the side wall angles of slope, the top and bottom widths and the normal groove depths.