Abstract: A retention assembly for a bearing assembly is disclosed herein. The retention assembly includes an inner ring defining an outer surface including a shoulder on an axial end of the inner ring. The outer surface includes at least one first area having a tapered profile and at least one second area defining a seat with the shoulder defined between the at least one first area and the at least one second area. A collar includes an inner surface defining a groove. A snap ring is arranged partially within the groove of the collar and is configured to face the shoulder and the seat of the inner ring.

Abstract: A bearing raceway for a shaft includes a tubular sleeve comprising a raceway section and a clamp section, the raceway section having a hardened outer surface and a first, axially linear, inner surface, and the clamp section having first threads and a second, axially non-linear, inner surface, where the first threads are configured to mate with second threads on a nut to clamp the tubular sleeve to the shaft.

Abstract: A rolling bearing includes an outer ring as a fixed ring, an inner ring as a rotary ring, and rolling elements disposed between the outer ring and the inner ring. The outer ring includes, on the radially opposite side of its raceway surface, a fitting surface fitted to a mating member, two annular grooves in which elastic members are fitted, and a recess adjacent to the annular grooves, and the recess has a bottom surface having an outer diameter smaller than the outer diameter of the fitting surface.

Abstract: Pass-through differentials are described.

Abstract: A double-row rolling-element bearing unit of a medical pump, preferably syringe pump, has a bearing core forming a first inner running surface for first rolling elements, which first inner running surface faces in an axial direction, and forms a second inner running surface for second rolling elements, which second inner running surface is arranged oppositely to the first inner running surface in the axial direction. The pump has a bearing bush, which can be mounted on a housing portion and forms a first outer running surface, which lies opposite the first inner running surface, and the pump has a bearing pan, which forms a second outer running surface, which lies opposite the second inner running surface. At least one preloading element couples the bearing pan to the bearing bush with a defined preload to join the double-row rolling-element bearing unit as a unit.

Abstract: An electrically operated displacement pump includes an electric motor having a stator and a rotor. The rotor is connected to the fluid displacement member to drive axial reciprocation of the fluid displacement member. A drive mechanism is disposed between and connected to each of the rotor and the fluid displacement member. The drive mechanism receives a rotational output from the rotor and provides a linear input to the fluid displacement member.

Abstract: A bearing liner allows a bearing to be mounted to a bearing housing even where the coefficients of thermal expansion of the bearing and the housing are different. The bearing liner includes a body portion and a mounting portion. The body portion has a cylindrical substrate that extends about a longitudinal axis of the bearing. The mounting portion includes mounting tabs that extend from the body portion of the liner. The mounting tabs allow the liner to be fixed to the housing and to the bearing. The mounting tabs are configured to flex relative to the body portion of the liner so as to allow for thermal expansion and contraction of the housing relative to the bearing while still securing the bearing to the housing.

Abstract: A tensioner for preloading a bearing, the bearing including inner and outer bearing rings. The tensioner including a component having a housing and a carrier element that extends radially inwardly from the housing, the outer bearing ring having an outer surface that forms an axially extending radial surface and having a first axial end formed by a radially extending axial surface and directly abutting the carrier element, a support element for supporting the component relative to the inner bearing ring such that a closed force flow arises from the outer bearing ring via the component and the support element, and a sleeve positioned radially between the outer surface of the first bearing ring and the housing such that an inner surface of the sleeve abuts the outer surface of the outer bearing ring and an outer surface of the sleeve abuts a conical surface of the housing.

Abstract: A rolling bearing includes an inner ring, an outer ring, a plurality of balls, and a cage. An annular groove for creep suppression is formed in a fitting surface of the outer ring to be fitted with a mating member (housing) to which the outer ring is to be mounted. An outer ring track groove with which the balls make rolling contact is formed in the inner peripheral surface of the outer ring on the side opposite to the fitting surface. The entire contact ellipse generated when each of the balls and the outer ring track groove contact each other is positioned within the axial range of the outer ring in which the annular groove is formed.

Abstract: Improved systems and methods facilitate precise adjustment of wheel-end tapered roller bearing preload force on an axle spindle with a diameter, a longitudinal groove or flat, and a thread pattern to receive a hexagonal adjustment nut with six outer edges. A basic system includes a flat round inner washer having an inner diameter corresponding to the diameter of the axle, an outer diameter, an inner surface, and outer surface and an outer edge. The inner washer includes a tab or D-shape to cooperate with a groove or flat, respectively on the axle to ensure that the washer does not rotate following installation. A plurality of markings are provided on the outer surface or the outer edge of the inner washer, each marking indicating the amount of rotation needed to cause a 0.001? lateral movement of the adjustment nut as a function of the diameter and thread pattern of the axle.

Abstract: The outboard motor includes a lower unit that rotatably supports a propeller shaft and a shift unit that switches a shift position. A drive shaft that transmits rotational power to the propeller shaft has upper and lower drive shafts provided coaxially and in series, end to end. The shift unit has an upper gear rotating in synchronization with the upper drive shaft, a lower gear provided rotatably with respect to the lower drive shaft, an intermediate gear that transmits rotation of the upper gear to the lower gear, and a bearing that rotatably supports the middle shaft provided with the intermediate gear. The intermediate gear and the bearing are modularized and are detachably installed to the lower unit.

Abstract: A split ring for use in assembling a bearing retainer onto a roll. The split ring helps keep a mounting jack in compression with the bearing retainer as the mounting jack compresses the bearing retainer onto the roll. In some embodiments, the split ring includes a plurality of apertures that are each configured to receive a drive mechanism that helps collapse the mounting jack to allow for removal of the split ring and the mounting jack once the bearing retainer is assembled onto the roll.

Abstract: A tubular bushing that is co-moldable with tubs of washing machines, the tubular bushing is engaged by a drive shaft of the washing machine, that extends along a central axis (A) and is provided with two rolling bearings, arranged at a given distance from each other along the axis (A) to rotatably support the drive shaft of the washing machine with respect to the tub. The tubular bushing further provides a containing sleeve, made of plastic material and co-molded around the two bearings; the sleeve defining an axial communication duct between two sides of the tubular bushing, the duct being closed, at least during co-molding, by a disposable cap, engaged in an annular edge of the containing sleeve.

Abstract: A wind turbine is provided. The wind turbine includes a stationary main shaft arranged within a nacelle of the wind turbine, a rotor hub including a hollow shell defining an interior and a plurality of rotor blades extending radially outwards from the rotor hub, wherein the rotor hub is rotatably mounted to the stationary main shaft via at least one bearing, wherein the at least one bearing is arranged within the interior of the rotor hub and connected to a section of the main shaft protruding into the interior of the rotor hub.

Abstract: In a creep preventing rolling bearing apparatus 21, an inner ring 12 is provided with a first key groove 13 opened at an inner peripheral face 12i in an axial end portion 12t. The first key groove 13 is provided so as to have a predetermined length L in the axial direction from the axial end portion 12t at a position having a certain depth D from an outer peripheral face 12o in a radial direction. A rotation shaft 17 is provided with a second key groove 13? on an outer peripheral face 17o along an axial direction. The first key groove 13 and the second key groove 13? are aligned and a key 18 is inserted, whereby the first key groove 13 and the second key groove 13? are fixed at the same time.

Abstract: A bearing support plate for use in a generator has a radially enlarged flange with a first cylindrical portion extending from the flange in one direction which will provide a bearing support for an outer race of a ball bearing, and a radially inner cylindrical portion extending in an opposed direction that will be away from the ball bearing relative to the flange. The flange is generally cylindrical but has a truncated portion over a circumferential extent. The first cylindrical portion is formed with radially enlarged portions with intermediate radially thinner portions. The flange includes bolt holes circumferentially aligned with the radially thinner portions.

Abstract: An axial control assembly comprises a bearing assembly and a bearing mount assembly, wherein the bearing mount assembly is structured to secure the bearing assembly in an operative configuration relative to a rotatable element of a mechanical device. The bearing assembly includes an inner bearing casing and an outer bearing casing structured to rotatably engage one another. The bearing mount assembly includes at least one axial control member disposed in an abutting relation to an axial load surface of one of the inner or outer bearing casing, and the axial control member is further positioned to counteract an axial load generated by a rotational movement of the rotational element of the mechanical device.

Abstract: A bearing assembly includes a bearing support having at least one bearing and at least one receptacle for at least one outer ring of the at least one bearing. The outer ring of the bearing has at least one annular groove, into which a snap ring is inserted relative to the bearing support in order to axially fix the outer ring. At least one alignment element is disposed on or in the bearing support. The snap ring is retained by alignment element relative to the bearing support at a defined angle relative to the rotational axis of the bearing.

Abstract: A bearing assembly includes a hub element or housing element which has an accommodating bore for at least one rolling-element bearing, the rolling-element bearing being disposed with its outer ring in a press-fit arrangement in the accommodating bore, and the outer ring having at least one first axial region along at least one raceway of the outer ring and at least one second axial region extending outside the raceway. To ensure a proper fit of the bearing ring in the hub or housing element over a wide range of operating temperatures, the receiving bore and the outer circumference of the outer ring are configured such that at the ambient temperature the radial clamping force between accommodating bore and outer ring in the first region is smaller than in the second region.

Abstract: A wheel drive unit includes: a planetary gear mechanism including a planetary gear and an internally-toothed gear; a casing integrated with the internally-toothed gear, a wheel being attached to the casing, and the casing transmitting rotation of the internally-toothed gear to the wheel; a bearing nut configured to prevent axial movement of the casing; and an oil seal provided more toward an interior of a vehicle than the planetary gear mechanism and axially fixed with respect the casing. An inner diameter of the detachment prevention member is smaller than an outer diameter of the externally-toothed gear.

Abstract: A rotary support, comprising: a bearing inner race; a bearing outer race including a plurality of axially disposed through holes; a first plurality of rolling elements installed between the bearing inner race and the bearing outer race, and arranged to retain the bearing inner race and the bearing outer race in rolling engagement; and an outer ring radially surrounding and fixed to an outer portion of the bearing inner race and disposed axially opposite to the bearing outer race; wherein the outer ring includes a plurality of axially penetrating mounting holes; and wherein the bearing outer race through holes are axially aligned with the outer ring mounting holes.

Abstract: A blade bearing for mounting a blade of a wind turbine to a hub of the wind turbine comprises inner and outer rings arranged next to each other. One of the inner and outer rings is configured to mount to the blade, and the other is configured to mount to the hub. At least two rows of rolling elements are positioned between the inner and outer rings. Upper and lower rows of the rolling elements are located in respective upper and lower planes. A support structure is secured to the inner ring and extends in a substantially radial direction between the upper and lower planes. The support structure has non-uniform stiffness characteristics in a circumferential direction. A method of manufacturing a blade bearing is also provided.

Abstract: A bearing with antiskid design used in combination with a circular spline to form a harmonic drive, and the circular spline is provided with an inner toothed portion, the bearing includes: an elliptical gear plug, a flexible ball bearing, and a flexible spline. Between the flexible ball bearing and the flexible spline are disposed a first and second antiskid members, and the arrangement of the first and second antiskid members prevents the axial slippage between the flexible ball bearing and the flexible spline, thus improving stability and transmission accuracy of the harmonic drive.

Abstract: An axle assembly having a housing, a bearing, and a bearing adjuster mechanism. The bearing adjuster mechanism may include an adjuster ring and a lock ring. The adjuster ring may have a set of teeth and exert a preload force upon the bearing. The lock ring may include a lock tab portion that extends between two teeth and engages a lock ring positioning feature disposed on the housing to inhibit rotation of the adjuster ring.

Abstract: A wheel carrier for a motor vehicle in which the wheel carrier is typically manufactured from aluminum. The wheel carrier comprises a recess (1) for receiving an outer ring (2) of a wheel bearing (3). An inner ring (4) of the wheel bearing (3) is fixed in a hub (15) of a wheel flange (12) of a vehicle axle. An axial end of the outer ring (2) of the wheel bearing (3) abuts against a shoulder of the wheel carrier (6), and a rim section (5) of the wheel carrier (6) is at least partially deformed to abut an opposite axial end of the outer ring (2) of the wheel bearing (3).

Abstract: A wheel bearing apparatus of a semi-floating type has a pilot portion 21 on an outer member 20. The pilot portion includes a cylindrical portion 21a and a tapered portion 21b. The tapered portion 21b gradually decreases in diameter from the cylindrical portion 21a to an end surface of the inboard side. A fitting portion 16 of an axle housing 14 corresponds to the shape of the pilot portion 21. An annular groove 22 is formed at the tapered portion 21b of the pilot portion 21. A seal ring 23 is mounted in the annular groove 22. An outer diameter d3 of the seal ring 23, after mounting, is set smaller than an inner diameter d4 of the cylindrical portion 16a of the axle housing 14. The seal ring elastically contacts the axle housing 14. A slight gap of a fitting portion between the outer member 20 and the axle housing 14 is blocked off.

Abstract: A shaft may have functional elements arranged thereon and at least one bearing point. At least one rolling bearing with rolling bodies may be arranged between the shaft and the at least one bearing point, the bearing having at least one rolling body cage configured to accommodate the rolling bodies and an outer ring. The rolling body cage may be fixed at least one of directly and indirectly to the shaft by a carrier ring and the outer ring may be fixed in the bearing point. The carrier ring may include the rolling body cage fixed thereon, the cage having a greater radial extent than the functional elements. The carrier ring may have a radial extent smaller than the greatest radial extent of one of the functional elements.

Abstract: A roller bearing for a shaft that has a cylindrical peripheral surface, the bearing including a race (12) to be fitted onto the shaft, and roller bodies (16) arranged to roll on the race (12), the race (12) having a polygonal internal cross-section, so that it engages the peripheral surface of the shaft only in the vicinity of the center of each side (28) of the polygon.

Abstract: A decoupling system for a rotary shaft of an aircraft turbojet, the decoupling system including: a rolling bearing including rolling elements inserted between a first ring fastened to a stationary bearing support and a second ring mounted in a mounting chamber fastened to a rotary shaft; a transmission mechanism transmitting rotary torque from the rotary shaft to the second ring; a mechanism allowing the second ring to move radially relative to the mounting chamber when a static force associated with an unbalance affecting the rotary shaft exceeds a predetermined threshold; and a plurality of leaktight flexible bags interposed between the second ring and the mounting chamber and each including a heterogeneous structure including a porous capillary solid matrix and an associated liquid relative to which the matrix is lyophobic.

Abstract: A pivot assembly bearing having a bearing inner ring, a shaft, a bearing outer ring, a housing, and an UV curable anaerobic adhesive fixing the bearing inner ring to the shaft, and the bearing outer ring to the housing, wherein the adhesive includes 15 to 25% of urethane acrylate, 45 to 55% of acrylic acid diester, less than 3% of acrylic acid monomer, 15 to 30% of hydroxyalkylmethacrylate, less than 3% of anaerobic catalyst, and less than 3% of photopolymerization initiating agent, and in addition, a coloring agent, if necessary. The pivot assembly bearing reduces outgas, shortens adhesive curing time, and no tack at the adhesive surface is obtained.

Abstract: A bearing assembly includes at least one rolling bearing unit having an outer race and an inner race rotatable relative to the outer race, and two annular bodies of plastic material overmoulded on the outer race and the inner race, respectively, of the bearing unit. At least one of the two annular bodies has a free cylindrical surface. One of the two bearing races forms a radially extending flange having a cylindrical end surface, circumferentially continuous or discrete, which ends flush with the free cylindrical surface of plastic material.

Abstract: In accordance with exemplary embodiments, a wheel assembly is provided for a vehicle. The wheel assembly includes a knuckle having a tapered inner surface to interface with an outer flange of a bearing. A threaded fastener retains the bearing within the knuckle. A wheel hub couples to an inner flange of the bearing permitting rotation of the wheel hub relative to the knuckle.

Abstract: A bearing (4) includes an outer ring (6), rolling elements (5) and a two-part inner ring (A). The two-part inner ring (A) includes a first part (1) having a radially outer surface (11) and an inner bore (12). Furthermore, the two-part inner ring (A) includes a second part (2) having a radially inner surface (21) and at least one raceway (22) for rolling elements. The radially outer surface (11) of the first part (1) essentially matches the radially inner surface (21) of the second part (2). A cavity (3), which in use acts as a pressure chamber, is located between the first and second parts (1, 2). When pressurizing the cavity (3), a relative axial movement between the first and second parts (1, 2) is accomplished.

Abstract: A printing press includes a roller having a first antifriction bearing and a second antifriction bearing. The first antifriction bearing has rolling bodies, a first ring and a second ring. One of the two rings forms an outer ring and the other of the two rings forms an inner ring. Roller sockets are configured as quick action changing devices for receiving the anti-friction bearings during insertion of the roller into the printing press. The first antifriction bearing is configured as an axial floating bearing with a considerable axial movement play of the rolling bodies between the latter and one of the rings. The second antifriction bearing is configured as an axial locating bearing without such a considerable axial movement play. A centering device centers one of the rings relative to the other.

Abstract: A bearing support plate for use in a generator has a radially enlarged flange with a first cylindrical portion extending from the flange in one direction which will provide a bearing support for an outer race of a ball bearing, and a radially inner cylindrical portion extending in an opposed direction that will be away from the ball bearing relative to the flange. The flange is generally cylindrical but has a truncated portion over a circumferential extent. The first cylindrical portion is formed with radially enlarged portions with intermediate radially thinner portions. The flange includes bolt holes circumferentially aligned with the radially thinner portions.

Abstract: A bearing apparatus to be supported by an axle box which includes a key groove, the bearing apparatus includes an outer ring which includes a first key groove extending from an inner diameter to an outer diameter of an axial end surface of the outer ring, an inner ring, rolling elements rollably interposed between the outer and inner rings, and a key member which includes an annular body, a first inwardly projecting part which is provided on the annular body and adapted to be inserted into the first key groove of the outer ring, and an outwardly projecting part which is provided on an outer periphery of the annular body and adapted to be inserted into the key groove of the axle box.

Abstract: A bearing lock is provided that improves upon existing methods of stabilizing a bearing in an electric motor. The bearing is fit between a rotatable shaft and a nonrotating annular support. The bearing has an inner race surrounding the rotatable shaft and has an outer race surrounded by the annular support. The bearing lock has an annular body with a midportion, an inner wall, and an outer wall. Both the inner wall and the outer wall extend generally in a first direction from the midportion and are spaced from one another to define an annular cavity therebetween. The outer wall has circumferentially-spaced integral tabs that extend at least partially toward the inner wall to provide a biasing force to lock the body to the annular support when the annular support is placed in the annular cavity.

Abstract: There is provided an assembling method of a bearing unit which has a bearing having an outer ring and a retainer plate having a retainer hole for holding the outer ring. The assembling method has pressing a plurality of portions in a circumferential direction of a circumferential edge of an inner circumferential portion of the retainer hole of the retainer plate in an axial direction so as to form engagement pawls and moving the engagement pawls of the retainer plate from one axial end of the outer ring to a engagement groove formed on an outer circumferential surface of the outer ring so as to engage the engagement pawls of the retainer plate with the engagement groove of outer ring.

Abstract: Under control of rotation of a crankshaft 41, a friction roller 32 is pressed against a friction roller 31 in a radial direction, so as to achieve torque transmission between the rollers 31, 32. An inter-roller radial pressing reaction is canceled as an internal force in bearing supports 23, 25, with no input to a housing 11. The reaction causes a radial displacement of a bearing-fitting portion provided with inner and outer bearings 21, 42 in double layer arrangement, wherein the radial displacement is larger than that of a bearing-fitting portion provided with a bearing 18, 19, 22 in single arrangement, so as to cause unbalanced contact between rollers 31, 32. In order to prevent this, support stiffness of bearing support 23 against the inter-friction-roller radial pressing reaction is set higher than that of bearing support 25.

Abstract: A pivot assembly bearing having a bearing inner ring, a shaft, a bearing outer ring, a housing, and an UV curable anaerobic adhesive fixing the bearing inner ring to the shaft, and the bearing outer ring to the housing, wherein the adhesive includes 15 to 25% of urethane acrylate, 45 to 55% of acrylic acid diester, less than 3% of acrylic acid monomer, 15 to 30% of hydroxyalkylmethacrylate, less than 3% of anaerobic catalyst, and less than 3% of photopolymerization initiating agent, and in addition, a coloring agent, if necessary. The pivot assembly bearing reduces outgas, shortens adhesive curing time, and no tack at the adhesive surface is obtained.

Abstract: A supporting structure includes a casing, a bearing having an inner ring, an outer ring, and rolling elements disposed between the inner ring and the outer ring, and an attachment member which detachably and directly attaches a shaft to the inner ring. The outer ring is supported by the casing, and the shaft is adapted to be able to be directly fixed to or removed from the inner ring by the attachment member in a state where the bearing is assembled to the casing.

Abstract: A roller bearing includes a stationary member, a rotary member and at least one row of rolling bodies arranged between the members so as to enable their relative rotation. The stationary member includes a circumferential surface that is resiliently deformable by the forces induced by the passage of the rolling bodies when the rotary member rotates. The surface has at least one instrumented area on which at least one gauge for measuring the deformations is attached. The instrumented area is circumferentially surrounded on each side by a non-instrumented area, and the rigidity of the instrumented area is strictly greater than the rigidity of the non-instrumented areas.

Abstract: An outer ring is provided with a key groove radially extending from an inner diameter to an outer diameter on an end surface thereof. A key member includes an annular body, an inwardly projecting part which is provided on an inner periphery of the annular body and adapted to be inserted into the key groove of the outer ring, and an outwardly projecting part which is provided on an outer periphery of the annular body and adapted to be inserted into a key groove of an axle box.

Abstract: A compact bearing support operable for supporting and damping movement of a bearing assembly. The bearing support includes a plurality of flexible elements engaging the bearing assembly in a plurality of locations.

Abstract: A method for manufacturing a drive wheel bearing device is provided. During the manufacturing, a swaged portion is formed in a manner as a non-hardened region, and in a manner that variations based on a reference surface in the axial direction of the flat surface are restricted within +/?0.2 mm. The reference surface is provided with an end face on an outboard side of a flange for an attachment of a wheel or an end face on an inboard side of the flange for attachment to a vehicle body. Part of the swaged portion making contact with an outer joint member of to drive wheel bearing device is formed into a flat surface. Serrations and a pilot part are formed on an inner periphery of a first inner member of the drive wheel bearing device. An inner peripheral surface of the pilot part is formed as a turned surface, and the turned surface has been turned after forming the swaged portion.

Abstract: Device including an inner shaft and an outer body rotatably mounted about an axis with respect to the shaft via at least one rolling bearing, the rolling bearing including an inner ring mounted on the inner shaft and an outer ring mounted in a housing of the outer body, the device including an automatic backlash elimination mechanism. The automatic backlash elimination mechanism includes a first washer having a tapered surface, and an elastic element in contact with the tapered surface of the first washer, the elastic element structured and arranged to generate a radial return force that is converted, by means of the tapered surface, into an axial force in order to eliminate the backlash related to the mounting of the rolling bearing. The first washer can be mounted on the shaft, in which case the elastic element generates a centripetal return force, or it can be mounted in the bore of the outer body, in which case the elastic element generates a centrifugal return force.

Abstract: A planetary type gear unit comprising a planet carrier with a planet bogie plate and at least one planet shaft, whereby on both sides of the bogie plate a planet wheel is mounted on the planet shaft by taper roller bearings, whereby the planet shaft is provided with an axially displaceable piece on each of its extremities forming an abutment which provides an axial support for the inner bearing rings of the taper roller bearings and with a tensioning elements by which the axially displaceable pieces can be displaced to one another for controlling the pre-tensioning on the taper roller bearings.

Abstract: A novel two-piece backing ring assembly for a railcar axle is presented. The backing ring assembly has an annular body affixed to the fillet of the journal and a locking ring for further affixing the annular body into position on the journal. The locking ring has an inboard end affixed to the dust guard of the shaft and an outboard end for engaging a slot in the annular body. The locking ring assembly may be retrofitted to older generation railcar axles to increase the structural rigidity of the bearing assembly and minimize fretting wear caused by railcar axle deflection.

Abstract: A needle roller bearing comprises an outer ring having a plurality of outer ring members split by a parting line extending in the axial direction of the bearing, a plurality of needle rollers rotatably arranged on the raceway surface of the outer ring, and a retainer retaining the plurality of needle rollers. A curvature radius r1 of the outer ring member and a curvature radius r2 of the outer diameter of the retainer has a relation such that 1<r1/r2<1.3.

Abstract: There is provided an assembling method of a bearing unit which has a bearing having an outer ring and a retainer plate having a retainer hole for holding the outer ring. The assembling method has pressing a plurality of portions in a circumferential direction of a circumferential edge of an inner circumferential portion of the retainer hole of the retainer plate in an axial direction so as to form engagement pawls and moving the engagement pawls of the retainer plate from one axial end of the outer ring to a engagement groove formed on an outer circumferential surface of the outer ring so as to engage the engagement pawls of the retainer plate with the engagement groove of outer ring.