Abstract: A device for forming circumferential grooves in pipe elements uses multiple geared cam bodies mounted on a carriage which rotates about a fixed pinion. The gears engage with the pinion which causes the geared cam bodies to rotate relative to the carriage. Traction surfaces and cam surfaces on the cam bodies traverse the outer surface of the pipe element and impress a circumferential groove therein. Each cam surface has a region of increasing radius and may have a region of constant radius. Second cam surfaces, positioned in spaced relation axially to the first cam surfaces, may also extend around the cam bodies. The second cam surfaces have a constant radius and limit flare of the pipe element.

Abstract: An electric drive motor has a stator with at least one electrically energizable stator winding, and a rotor which is mounted in a rotationally driveable manner in the field of the at least one stator winding so as to leave free an annular gap. The motor also has a motor shaft and a magnet carrier which is arranged coaxially in relation to the motor shaft and has at least one permanent magnet which is arranged on an outer periphery of the magnet carrier. The motor shaft and the magnet carrier are of integral design by way of the motor shaft and the magnet carrier being jointly produced from an individual starting metal sheet by shaping to form an integrally shaped rotor body. There is also described a wet-rotor pump and a domestic appliance having an electric drive motor of this kind.

Abstract: The present disclosure discloses an automobile wheel hub shaping device. The automobile wheel hub shaping device includes a clamping part for clamping a wheel hub to be shaped, a first driving mechanism for driving the clamping part to rotate, a shaping roller for shaping the wheel hub to be shaped, and a rack; all the clamping part, the first driving mechanism and the shaping roller are mounted to the rack, the shaping roller is located above the clamping part and is capable of rotating relative to the clamping part; and the clamping part is equipped with a fixing part for fixing the wheel hub to be shaped.

Abstract: A structural member for automobiles to be disclosed includes a press formed product. The press formed product includes two vertical wall sections and a top plate section that joins the two vertical wall sections to each other. At least part of the top plate section is provided with a protruding section that is a steel sheet extending from the top plate section and so folded over against itself as to protrude. The protruding section protrudes from the top plate section toward the interior of the press formed product and extends along the longitudinal direction of the press formed product. With the thus configured structural member, a structural member for automobiles that has a good characteristic in a three-point bending test is provided.

Abstract: A wheel speed detection device includes a detection element, a base member, and an affixing member. The detection element has a main body, leads, and protruding from the main body. The affixing member affixes the detection element to the base member by pressing the leads and against the base member without pressing the main body against the base member.

Abstract: A hot forging press machine includes a fixed lower die, a vertically movable upper die, a punching blade for punching, and a deburring blade. The deburring blade includes a deburring upper blade and a deburring lower blade to perform deburring. The deburring upper blade is fixed to a lower portion of the upper die, and the lower blade is fixed to an upper portion of the lower die. A lower sweeping plate urged upward by a spring is slidably fitted to an outer circumference of the lower blade to perform deburring, and an upper sweeping plate of the upper die presses an entirety of an upper surface of a flange portion of a pressed product to perform the discharging.

Abstract: An outer member and an inner member constituting a wheel bearing device are assembled and the brake rotor is fixed to the hub ring of the inner member. In this state, the pad slide surfaces of the brake rotor are lathed with the reference provided by a wheel pilot end surface. Alternatively, the wheel pilot end surface of the hub ring by chucking the knuckle pilot of the outer member with the wheel bearing device put in its assembled state, and the pad slide surfaces of the brake rotor are lathed with the reference provided by the wheel pilot end surface.

Abstract: When an inner ring of a driving-wheel supporting hub unit is fixed to a hub, a pressing die is displaced downward and an annular working surface at a lower end surface of the pressing die is pressed against a front end of a cylindrical portion over its whole periphery. Further, in this state, the pressing die is pressed downward toward the hub without rocking the pressing die relative to the hub. Thus, the cylindrical portion is plastically deformed radially outward along the working surface simultaneously over its whole periphery. By adopting this method, the operation of plastically deforming the cylindrical portion at the inner end of the hub to form a caulking portion, can be easily and performed accurately. Accordingly, the structure of the caulking portion forming apparatus can be simplified.

Abstract: An axle spindle and wheel end assembly includes a precision-formed axle spindle, wheel hub, and axle spindle nut. The axle spindle is formed with parallel inboard and outboard bearing surfaces, a shoulder that is perpendicular to the inboard and outboard bearing surfaces, and threads for a spindle nut that are aligned with the inboard and outboard bearing surfaces. The wheel hub is formed with inboard and outboard bearing surfaces that are in parallel alignment with one another, and bearing axial stop surfaces that are perpendicular to the wheel hub bearing surfaces. The spindle nut is formed with threads on its inner periphery and a flat inboard surface that is perpendicular to the threads. The axle spindle, wheel hub, and spindle nut cooperate to enable an axle spindle nut assembly to consistently provide a light preload on a bearing cone and spacer group of the wheel end assembly.

Abstract: A fixture for final finishing flange faces of a hub of a knuckle assembly includes a mounting surface, a drive arrangement and a clamping arrangement. The drive arrangement is operative for engaging and rotating the hub of the knuckle assembly relative to the remainder of the knuckle assembly. The drive arrangement includes a drive member extending along a drive axis. The drive member is rotatable about the drive axis. The clamping arrangement is carried by the mounting surface. The clamping arrangement radially surrounds the drive arrangement and is operative for clamping the fixture relative to the mounting surface. The clamping arrangement includes a housing, a piston assembly radially positioned between the housing and the drive member, and a clamping sleeve radially disposed between the piston assembly and the clamping sleeve. The piston is movable in a first direction generally parallel to the drive axis.

Abstract: An axle spindle and wheel end assembly includes a precision-formed axle spindle, wheel hub, and axle spindle nut. The axle spindle is formed with parallel inboard and outboard bearing surfaces, a shoulder that is perpendicular to the inboard and outboard bearing surfaces, and threads for a spindle nut that are aligned with the inboard and outboard bearing surfaces. The wheel hub is formed with inboard and outboard bearing surfaces that are in parallel alignment with one another, and bearing axial stop surfaces that are perpendicular to the wheel hub bearing surfaces. The spindle nut is formed with threads on its inner periphery and a flat inboard surface that is perpendicular to the threads. The axle spindle, wheel hub, and spindle nut cooperate to enable an axle spindle nut assembly to consistently provide a light preload on a bearing cone and spacer group of the wheel end assembly.

Abstract: A method for forming a wheel bearing apparatus where the end portion of the cylindrical portion is pre-formed as a cylinder prior to its plastic deformation to form the caulking portion. A caulking tool with a punch and a swing shaft abuts against the end portion of the cylinder at a predetermined inclined angle relative to the inner circumferential surface of the cylinder. Teeth on the punch form the face-spline by plastically deforming the end face of the caulking portion. The swing shaft central axis is inclined at an angle relative to a central axis of the wheel hub. The face-spline is formed simultaneously with the formation of the caulking portion by advancing the caulking tool toward the wheel hub. A main shaft is rotated to cause a swing motion of the caulking tool.

Abstract: A method of making a rear hub of a bicycle comprises: swaging a straight pipe into an hour-glass-shaped semi product, extruding the semi-product to form a hub flange, punching a plurality of holes in the hub flange of the semi-product, binding an edge of an end of the semi-product, necking down the edge-bound end of the semi-product, trimming the semi-product, and chamfering the holes of the semi-product to form a chamfer structure on an edge of the respective holes.

Abstract: To realize a manufacturing method for a wheel-supporting rolling bearing unit that can establish sufficient parallelism between a rotating side installation surface 14 for fastening to and supporting a disk of a disk brake and a stationary side installation surface 15 for fastening a caliper or support, in the present invention, while rotating a hub 2 comprising the rotating side installation surface 14 with respect to an outer race comprising the stationary side installation surface, a finishing process such as turning is performed on the rotating side installation surface 14 or both side surfaces in the axial direction of the disk which is fastened and supported to and by the rotating side installation surface 14, with the stationary side installation surface 15 as a reference surface.

Abstract: A motor adopting an improved mechanism is composed of a stator having a shaft and a rotor provided with a sleeve and a hub, wherein the shaft is inserted into the hub and the hub is fixed on an outer circumferential surface of the sleeve. The outer circumferential surface of the sleeve is provided with a first outer circumferential surface, a second outer circumferential surface and a receiving surface that links between the first and second outer circumferential surfaces. The hub is provided with a base section, a through hole and a first protruded section protruding downward from the base section. A tip end portion of the first protruded section is provided with a hitting surface that contacts with the receiving surface of the sleeve and a second protruded section that links to the contacting surface and protrudes downward from the contacting surface.

Abstract: A method for making positioning structures of a bicycle hub comprises the steps of: A. bicycle hub clamping step; B. bicycle hub press forming step; and C. bicycle hub loading step. By such arrangements, the positioning structures of the bicycle hub can be obtained by the quick press forming without affecting the structure strength.

Abstract: Bolt holes 23 are provided for press fitting and securing bolts 5 for mounting a brake rotor 4 to a flange 22 of a hub wheel. Each bolt hole 23 includes widening portions 28a, 28b, which are tapered to widen from the center portion of the bolt hole 23 toward a brake rotor mounting surface 25 of the flange 22. The widening portions 28a, 28b are formed by two tapered surfaces having different taper angles with respect to the axis of the bolt hole 23 from an opening rim of the bolt hole toward the inside. The taper angle of an outer tapered surface connected to the opening rim is greater than the taper angle of an inner tapered surface connected to the outer tapered surface. In machining the hub wheel 2 configured as described above, the brake rotor mounting surface 25 is finished after machining the bolt holes 23.

Abstract: A method of making a rear hub of a bicycle comprises: swaging a straight pipe into an hour-glass-shaped semi product, extruding the semi-product to form a hub flange, punching a plurality of holes in the hub flange of the semi-product, binding an edge of an end of the semi-product, necking down the edge-bound end of the semi-product, trimming the semi-product, and chamfering the holes of the semi-product to form a chamfer structure on an edge of the respective holes.

Abstract: A rotary forming method for producing a rivet flange of a wheel hub on which a wheel bearing is mounted. A rivet flange is formed from a cylindrical part of a wheel huh by a hobbing tool oriented along a direction of the axis of rotation of the wheel hub. The method keeps material stresses low and accurately adjusts the preload of the bearing. For this purpose, first rotating rolling elements of at least one first row of rolling elements of the tool form the rivet flange. Axes of rotation of the first rolling elements form a first angle with the axis of rotation of the rolling bearing during the riveting operation, ensuring uniformity on the entire circumference of the cylindrical part of the wheel hub using a smaller deformation force while allowing the rolling bearing to be temporarily preloaded by a holding element even before the cold forming process.

Abstract: A method for making an axle rotating portion including a hub, at least one rolling bearing, and a stub axle, the rotating portion configured to receive a brake disc. The method includes at least one machining of the support surface of the hub, against which the disc is configured to be urged to press, the machining being carried out on a subassembly foamed by assembling at least the hub and the roller bearing and to obtain at least one part of the support surface substantially perpendicular to the axis of the roller bearing in the subassembly.

Abstract: An outer ring of a bearing device for a vehicle has a cylindrical main body extending from an inner vehicle side to an axially opposite side. The main body has a raceway at an inner peripheral surface. A flange is provided at an outer peripheral surface of the outer ring toward the ring's vehicle inner side end. A cylindrical fitting tolerance part also is provided at the outer peripheral surface of the outer ring, at a position closer to the vehicle inner side end than the flange. The axial length of the cylindrical fitting tolerance part may be designed to be any of various lengths. The bearing device is manufactured by turning the cylindrical main body while holding the flange, such as for embodiments in which the cylindrical fitting tolerance part has a short length unsuitable for holding.

Abstract: A knuckle hub assembly (10) and a method for manufacturing same whereby brake run out is produced includes a knuckle (12), a bearing (28) press fit into the knuckle (12), and a wheel hub (14) coupled to the bearing (28) and rotateable with respect to the knuckle (12). The wheel hub (14) has a flange surface (34) having a relief channel (60) formed therein. A plurality of wheel studs (44) are press fit into bolt opening (42) formed in the relief channel (60). This arrangement provides a flat flange surface (34) for mating with a rotor (42) to minimize brake run out. The knuckle hub assembly (10) is mounted into a floating tool for finish turning of the flange surface (34) to provide minimal run out and maximum flatness.

Abstract: After a hub supporting member is mounted on an end portion of a spindle, correction work is applied to a ring-shaped supporting surface which is an end face of the hub supporting member, whereby perpendicularity of the supporting surface relative to a rotational center axis of the spindle is improved. Thereafter, while the hub main body is made to rotate together with the spindle in such a state that the mounting surface abuts with the supporting surface, grinding finishing work is applied to a cylindrical surface portion (a portion on which inner rings are fitted) of the hub main body. As a result, the perpendicularity of the mounting surface relative to the geometric center axis of the cylindrical surface portion is improved.

Abstract: A method for making positioning structures of a bicycle hub comprises the steps of: A. bicycle hub clamping step; B. bicycle hub press forming step; and C. bicycle hub loading step. By such arrangements, the positioning structures of the bicycle hub can be obtained by the quick press forming without affecting the structure strength.

Abstract: A brake disk mounting surface is ground by bringing it into contact with an annular grinding wheel, while an inner ring having the brake disk mounting surface is rotated around its center axis, in a state where a part of the annular grinding wheel overlaps with a recess over an entire region of the annular grinding wheel in a radial direction, and in a state where a grinding surface of the annular grinding wheel is inclined with respect to the brake disk mounting surface so that a distance between the brake disk mounting surface and the annular grinding wheel grows larger in a direction toward an outer edge of the brake disk mounting surface.

Abstract: A method and apparatus for fabricating a workpiece is provided. The method includes applying a predetermined axial force to a tool, translating the axial force into a radial force in the workpiece using the tool, and generating a hoop stress in the work piece sufficient to relieve residual stress in the workpiece.

Abstract: A method for making an axle rotating portion including a hub, at least one rolling bearing, and a stub axle, the rotating portion configured to receive a brake disc. The method includes at least one machining of the support surface of the hub, against which the disc is configured to be urged to press, the machining being carried out on a subassembly formed by assembling at least the hub and the roller bearing and to obtain at least one part of the support surface substantially perpendicular to the axis of the roller bearing in the subassembly.

Abstract: A clamping device (1) for receiving and for the clearance-free prestressing of a wheel bearing comprises a clamping mechanism (3) which radially prestresses the wheel bearing (8) from the outside.

Abstract: A method of making a rear hub of a bicycle comprises: swaging a straight pipe into an hour-glass-shaped semi product, extruding the semi-product to form a hub flange, punching a plurality of holes in the hub flange of the semi-product, binding an edge of an end of the semi-product, necking down the edge-bound end of the semi-product, trimming the semi-product, and chamfering the holes of the semi-product to form a chamfer structure on an edge of the respective holes.

Abstract: Respective constituent members of a wheel bearing unit 5 are assembled and also a cover 74 is fixed to an inner end portion of an outer ring 6. The wheel bearing unit 5 is fitted to a turning machine 38 in a state that a space in which an encoder 72 is provided is sealed tightly from an outside by fitting a stop plug 96 into an insertion hole 84 provided in the cover 74. A top end portion of a rotating shaft 40 of a turning machine 38 is engaged with an engaged concave portion 102 provided to a hub 8a. A turning process is applied to an outer side surface of a rotary flange 13 while turning the hub 8a around the outer ring 6 by the rotating shaft 40, and thus the outer side surface is processed in predetermined shape and dimension.

Abstract: A method of making a front hub of a bicycle comprises: swaging a straight pipe into an hour-glass-shaped semi product, extruding the semi-product to form a face chuck, punching a plurality of holes in the face chuck of the semi-product, trimming the semi-product; and chamfering the holes of the semi-product to form a chamfer structure. A method of making a rear hub of a bicycle comprises: swaging a straight pipe into an hour-glass-shaped semi product, extruding the semi-product to form a face chuck, punching a plurality of holes in the face chuck of the semi-product, binding an edge of an end of the semi-product, necking down the edge-bound end of the semi-product, trimming the semi-product, and chamfering the holes of the semi-product to form a chamfer structure on an edge of the respective holes.

Abstract: A magnet (10) that is an annular member is fixed or secured on an outer circumference surface or an inner circumference surface of a yoke (4) that is a cylindrical member. An lower end surface in the axial direction of the magnet is fixed or secured to the same plane as a lower end surface in the axial direction of the yoke (4), or the lower end surface in the axial direction of the magnet is fixed or secured so as to protrude a little from the lower end surface in the axial direction of the yoke. An annular groove (4a) that is recessed outward in the radial direction or inward in the radial direction is formed on a part of the outer circumference surface or the inner circumference surface that is continuous to the yoke (4).

Abstract: A module corner assembly wherein a wheel hub is permanently attached to a knuckle and various surfaces on the wheel hub and knuckle are machined in a same fixture utilized in holding the knuckle to deform an end on the wheel hub against a cone of a bearing. When a rotor is thereafter attached to the wheel hub it is also machined in the same fixture such that a perpendicular relationship is established between the axis of the wheel bearing and braking surfaces on the rotor and as a result a desired lateral run out relationship is achieved between the axis of the bearing and rotor surfaces.

Abstract: A feed wheel includes a hub and a discontinuous tread removably fitted about the hub. At leading and trailing ends of the discontinuous tread are mateable non-planar female and male surfaces which interfit with one another and tend to interlock the tread ends together. The tread has locking lugs formed under leading and trailing ends and an intermediate segment of the tread which fit into holes configured and located in the hub complimentarily to the locking lugs. The holes and locking lugs are oriented relative to one another so as to enable the tread to be retained about the hub with the tread ends interlocked together during operation of the feed wheel.

Abstract: In a manufacturing method and a manufacturing apparatus for a wheel-support rolling bearing unit, when forming a crimped portion 14 on an end (inside end) of a hub main body 8a, by rocking die forging using a die 26, while preventing enlargement of equipment, in order to prevent forming indentations in a second outer raceway 6a and a second inner raceway 12a, in the present invention, the outer ring 1a is turned by a motor 48, and the balls 32 are rotated. A difference is provided between the rotation speed of the balls 32 and an oscillation speed of the die 26. This difference is preferably at least 10 min?1. By rotating the balls 32 the formation of indentations in the second outer raceway 6a and the second inner raceway 12a is prevented. Moreover, by providing the difference between the rotation speed and the oscillation speed of the die 26, an increase in the torque required for rotation the outer ring 1a is suppressed.

Abstract: A knuckle (16) for a corner assembly (10, 210, 310) wherein a cylindrical body (18) has an outboard race (39) and an inboard race (45) located therein for correspondingly receiving a first roller assembly (52) and a second roller assembly (94) carried by a wheel hub (56) such that brake engagement surfaces (12a) and (12b) on a rotor (12) are located in a parallel relationship with faces on a friction members (14a) and (14b) associated with caliper (14) and perpendicular with the axis of the wheel hub (56) to obtain a desired lateral run out relationship between the rotor (12) and the axis of the first (52) and second (94) roller assemblies retained in the wheel hub (56).

Abstract: A carrier C is integrally formed of a pair of flanges opposed to each other and designed to rotatably support rotating bodies therebetween and a plurality of joints for connecting the flanges. A groove is formed on the border between the flanges and the joints, and openings are made among the joints. Engagement holes for rotatably supporting rotational shafts of rotating bodies are made in the flanges.

Abstract: At a surface opposite to a mounting surface 28 at a part of the mounting flange 13, a projecting part 27 is provided so as to surround the opening part of the mounting holes 23 for press-fitting each stud thereinto. A finishing process of the mounting surface 28 is carried out after the stud 24 is press-fitted into the mounting hole 23.

Abstract: A module corner assembly wherein a wheel hub is permanently attached to a knuckle and various surfaces on the wheel hub and knuckle are machined in a same fixture utilized in holding the knuckle to deform an end on the wheel hub against a cone of a bearing. When a rotor is thereafter attached to the wheel hub it is also machined in the same fixture such that a perpendicular relationship is established between the axis of the wheel bearing and braking surfaces on the rotor and as a result a desired lateral run out relationship is achieved between the axis of the bearing and rotor surfaces.

Abstract: The wheel hub of a bicycle is made of a single part of structural fiber based material, typically carbon fiber material, after reticulation in a mould which exploits the expansion of a core to obtain the application of a radial pressure to the tubular body consisting of layers of structural fiber based fabric.

Abstract: The present invention relates to an axial force controlling method for controlling an axial force applied to a rolling bearing in a bearing apparatus having a shaft body, the rolling bearing being mounted to the shaft body such that the rolling bearing fits an outside of the shaft body, and the bearing apparatus.

Abstract: A bearing apparatus includes a hollow shaft provided around an outer peripheral surface with a bearing fitting region, and a rolling bearing having an inner ring fitted around the bearing fitting region of the hollow shaft. A shaft end of the hollow shaft is bent outwardly in a diametrical direction, thereby being caulked on an outer end surface of the inner ring. The bearing fitting region has a hardened layer in a region from a first position corresponding to an inner end surface of the inner ring of the rolling bearing to a second position before a position corresponding to an outer end surface of the inner ring, and has a non-hardened layer in another region from the outer end surface corresponding position of the inner ring to the shaft end. The second position representative of a caulked side end portion of the hardened layer is defined based on a predetermined relational expression.

Abstract: A reliable brake rotor and wheel bearing assembly are proposed which make unnecessary adjustment of runout of brake rotor at the customer's factory. For runout of each of the mounting surface and back of the brake rotor itself, and runout of the side of the wheel mounting flange of the inner member to which is mounted the brake rotor, the maximum difference between the peaks of crests and troughs in each period of surface runout is restricted within a standard value, and the brake rotor is mounted to the wheel mounting flange, thereby eliminating the necessity of mounting of the brake rotor and adjustment of runout after mounting at the customer's factory to provide a reliable automotive wheel bearing assembly.

Abstract: Provided is a method of fitting a tire-and-wheel assembled body to an axle, which is capable of resolving imbalance in a state of fitting an assembled body including a tire and a wheel to an axle. In this fitting method, a tire is fitted to a wheel, and then core positions of fastening holes are, or a core position of a hub hole is, adjusted in the wheel to minimize an amount of eccentricity of an assembled body including the tire and the wheel.

Abstract: A cylindrical portion 10 is not quenched, and its hardness of a cylindrical portion 10 is set at Hv200 to 300. An average cross sectional area of the crystal particle in this portion is set to be within 0.03 mm2. Accordingly, when a caulking portion is formed by expanding the cylindrical portion 10b to an inner ring 3 to a hub 2b made of carbon steel, cracks or the like are not formed in the resultant caulking portion.

Abstract: A bearing is mounted on a hollow shaft of a hub wheel. A shaft end of the hollow shaft is deformed radially outward and caulked to an outer end face of an inner ring of the bearing. Between a first area in which a spline portion is formed and a second area in which a caulked portion is formed, between a bending starting point for bending the shaft end radially outward and an end face of the shaft end on an inner peripheral face of the hollow shaft, a third area for suppressing deformation of the inner peripheral face of the hollow shaft caused by the caulking is formed. The third area cushions deformation in the first area.

Abstract: An inner ring 3 is fit to a stepped part 8 formed on the inner end of a hub 2b. A desired pre-load is applied to rolling elements 5 in a state that an outer end face 28 of the inner ring 3 is butted against a step surface 12 formed on the hub 2b. The inner ring 3 is fit to the hub 2b by interference fitting causing a static friction force, which is larger than a thrust load acting on the inner ring 3 based on the pre-loading. Therefore, the inner end face of the inner ring 3 is clamped with a caulking portion, which is formed by expanding outward in the diameter directions a cylindrical portion 18 formed in the inner end of the hub 2b.

Abstract: A method is disclosed for forming an annular collar (11) that is essentially radial on the hollow annular end portion (12) of a port (7). This method has the following steps: A. radially deforming the end portion (12) by means of a first tool (16), in which the axis (18) of the tool (16) and the axis (5) of the end portion (12) form a non-zero angle ? between them to obtain an essentially radial collar preform (17); and B. deforming this preform (17) by means of a second tool (23) to obtain a final shaping of the collar (11) by pressing. This invention also relates to a method of retaining a bearing (1) on a shaft (7), and to the assembly that comprises this shaft (7) and bearing (1).

Abstract: A process for manufacturing a corner assembly for a vehicle. A wheel hub is partially machined to define a journal section and a radial mounting flange on an out-board surface of the hub. Bolts are pressed into axial openings in the mounting flange and the hub further machining to produce a concentric wheel pilot, rotor pilot and bearing journal surfaces that are perpendicular to radial faces on an out-board surface of the mounting flange. The hub is pressed into a bearing retained of a support member and a rotor is placed on the rotor pilot surface such that the bolts extend through openings located on the inner peripheral surface of the rotor. The hub is rotated to gage lateral deflection with respect to its axis. If the deflection is less than 0.06 mm, the wheel hub and rotor are accepted for installation on a vehicle and rejected if greater that 0.06 mm.

Abstract: A caulked portion is formed by plastic deformation of a cylindrical portion which is formed at the inner end of a shaft member and is reduced in thickness toward the leading end in a diametrical outward direction. The force required to form the caulked portion is reduced, and the caulked portion is less susceptible to damage. Further, the force of the caulked portion for supporting the inner ring is ensured.