Abstract: A split taper roller bearing comprising an inner ring including an inner tapered race, an outer ring including an outer tapered race, a cage mounted between the inner and outer tapered races, said cage mounting tapered rollers which engage the inner and outer races, said inner ring and inner tapered race, outer ring and outer tapered race, and cage each comprising two generally semicircular parts, the relevant semicircular parts being mounted end-to-end to provide a circular component, whereby the two semicircular parts of the inner ring and inner tapered race, outer ring and outer tapered race, and cage, may be separated from one another to allow the taper roller bearing to be dismantled when worn without removal of the component supported by the bearing.

Abstract: There are provided tapered roller bearings which support a pinion shaft. Inner races have large rib faces each having a recessed surface shape on which large-diameter end faces of tapered rollers slide. The surface roughness of the large-diameter end face is ?1 [?mRa] is 0.025 or more. In addition, assuming the surface roughness of the large rib face is ?2 [?mRa], (?12+?22)1/2 is 0.17 [?mRa] or less. The sliding portion of the large-diameter end face and the sliding portion of the large rib face are made of a carburized steel, and the carbon content in a matrix phase in a surface layer portion of each of the sliding portions to a depth of 50 ?m from a surface is 0.8 wt % or more, the surface hardness thereof is in the range of Rockwell C63 to 67, and a surface retained austenite amount is set to be 20% or more and 25% or less.

Abstract: A tapered roller bearing includes: an oil guide member that opens and closes an annular opening between an outer peripheral surface of a large rib of an inner ring and an outer ring and is mounted on the large rib; and a discharge port that discharges, along the outer peripheral surface of the large rib, lubricating oil and is formed through an inner peripheral portion of the oil guide member. The oil guide member includes a closing portion for closing the annular opening. When a fluid pressure of the lubricating oil which flows through pockets of a cage toward an inner peripheral surface of the outer ring is below a predetermined values, the closing portion closes the annular opening and guides the lubricating oil toward the discharge port. When the fluid pressure exceeds the predetermined value, the closing portion opens the annular opening.

Abstract: A wheel hub assembly is fitted to a vehicle axle via a wheel bearing mounted on the axle. The assembly includes a hub mountable on the wheel bearing and rotatable relative to the vehicle axle and fastening members to releasably secure the hub relative to the wheel bearing. The hub can be removed without removing the wheel bearing.

Abstract: Emergence of fretting worn powder is to be suppressed, and intrusion of the worn powder that has emerged into an internal area of the bearing. A ring spacer is interposed between an end face of an inner ring of the bearing to be mounted on a wheel axle, and an end face of a rear cover (ring member) to be mounted on the wheel axle for axial positioning of the inner race with respect to the wheel axle. An elastic seal ring is integrally fixed to an outer periphery of the ring spacer. The elastic seal ring is elastically fitted to an outer circumference of a recessed stepped portion formed on the end face of the rear cover. The elastic seal ring is thus pressed against the opposing end faces of the inner race and the rear cover. Inside the elastic seal ring, a storage space for the worn powder is provided.

Abstract: A tapered roller bearing includes an inner ring, an outer ring, a plurality of tapered rollers, and a cage. The cage includes a large diameter-side annular section, a small diameter-side annular section, and pillar sections connecting the large diameter-side annular section and the small diameter-side annular section and forming pockets retaining the tapered rollers. The radially inner surfaces of the pillar sections are disposed closer to the center than a pitch circle of the tapered rollers and are inclined from the small diameter-side annular section toward the large diameter-side annular section, thereby forming guide surfaces that guide lubricating oil toward the large rib. Roller holding portions are formed on side portions of the pillar sections so as to protrude along the outer peripheral surfaces of the tapered rollers to a position located at the outer side in the radial direction than the pitch circle.

Abstract: A cylindrical roller bearing includes an inner ring having a flange portion provided with a roller guide-surface which guides the end faces 4a of the cylindrical rollers having diameter of Da. The end face 4a away from a center axis of the cylindrical roller by 0.40 Da in the radial direction is a first position A, and the end face 4a away from the center axis by 0.35 Da is a second position B, the end face 4a contacts with the roller guide-surface between the first and second positions A and B, the end face 4a has a convex-shaped crowning portion 4b having a continuous curve which passes the first and second positions A and B, and an angle ? formed between a line connecting the first and second positions A and B and a line perpendicular to the center axis is set to be 0.5° or less.

Abstract: An angular contact ball bearing includes a plurality of balls disposed between raceways of inner and outer bearing rings. Each ball is in contact with at least one of the raceways at two points having different contact angles from each other and located on an opposite side of a bearing centerline from a point at which each ball is in contact with the other of the raceways. The bearing is a full complement bearing, wherein the balls are arranged in a full complement. With this arrangement, it is possible to minimize the contact stress at the two contact points where the radial load and the axial load in one direction are supported, thereby reducing elastic deformation at the two contact points. This makes it possible to further increase the rigidity of the bearing.

Abstract: An end faced on an outer side in a radial direction of a small diameter annular portion of a retainer is disposed on an inner side in a radial direction of a pitch conical face of a taper roller and an end face on an inner side in a radial direction of a large diameter annular portion is disposed on an outer side in the radial direction of the pitch conical face. Further, a portion of the small diameter annular portion opposed to a small diameter end face of the taper roller is disposed on the inner side in the radial direction of the pitch conical face and a portion of the large diameter annular portion opposed to a large diameter end face of the taper roller is disposed on the outer side in the radial direction of the pitch conical face.

Abstract: Durability of a planetary gear set can be enhanced and noise can be reduced by utilizing a power transmitting apparatus for a hybrid vehicle that supports a planetary gear set in an axial direction and a perpendicular direction. In addition, because a parking gear is disposed on a second shaft, torque can be minimized when the vehicle is parked on a slanted road.

Abstract: A tapered roller bearing includes an outer race, an inner race, a plurality of tapered rollers, and a cage. A small-diameter end portion of the inner race is formed with a small flange portion for limiting axial movement of the tapered rollers and a cylindrical portion which has a less diameter than the small flange portion and is connected to an axial outer end of the small flange portion. The cage is formed at a small-diameter end portion thereof with a bent portion which is bent inward in a radial direction. A small-diameter end portion of the cage has a bent portion which is faced to an outer surface of the cylindrical portion of the inner race with a predetermined clearance therefrom such that a labyrinth is created between the cage and the inner race.

Abstract: A hub joint for supporting bearings adapted to rotatably receive a shaft. The joint includes an upper annular portion having a radially inner boundary and an upper bearing mount attached to the inner boundary of the upper annular portion. The upper bearing mount has a radially inner surface forming a conical upper bearing seat. The joint further comprises a lower bearing mount attached to and positioned below the upper bearing mount. The lower bearing mount has a radially inner surface forming a conical lower bearing seat. The joint also comprises a lower annular portion having a radially inner boundary attached to the lower bearing mount.

Abstract: Bearing, characterized in that it is composed of two bearings which are configured such that the composed bearing can be loaded in the radial direction and in both axial directions, whereby these two bearings fit in an outer bush which is provided with an axial stop.

Abstract: A tapered roller bearing 1 comprises an inner ring 2, an outer ring 3, a plurality of tapered rollers 4 rollably disposed between the inner and outer rings, and a cage 5 for holding the tapered rollers at predetermined circumferential intervals. In this tapered roller bearing, the roller coefficient {y=(the number of rollers ×mean roller diameter)/(?×PCD)} is greater than 0.94. At least one of the members, i.e., the outer ring, inner ring, and rolling elements, has a nitrogen rich layer. The grain size number of austenite crystal grains in the nitrogen rich layer exceeds number 10.

Abstract: A tapered roller bearing includes: an outer race including an outer raceway surface; an inner race including an inner raceway surface and a larger collar surface which is a concave curved surface; and tapered rollers provided between the outer and inner races, each of the tapered rollers including a tapered surface and a larger end surface which is a convex curved surface communicating with the tapered surface and corresponds to the larger collar surface.

Abstract: A double-row angular-contact antifriction bearing including an outer bearing ring, and an inner bearing ring and rolling elements between the bearing rings in two rows next to one another on raceways of the bearing rings. A bearing cage for the rolling elements. The inner bearing ring is axially split and is of two individual rings which are connected and between which a distance ring defines axial prestress between the rolling elements of the both rows. The distance ring between the individual rings of the axially split inner ring is a connecting element of the individual rings.

Abstract: A full complement taper roller bearing consists of an inner ring or cone having an inner track on its radially outer conical surface, and an outer ring or cup having an outer track on its radially inward conical surface and one or more rows of taper rollers having a contact angle of less than 30 degrees freely disposed between the inner and outer rings and guided between the tracks. Each row of rollers is axially located within a recess on the inner track defined by a shoulder abutment disposed at least at the edge of the inner track having the greatest diameter and each of the rollers is in contact with the inner track over the entire length of the taper roller in the axial direction of the bearing.

Abstract: The invention relates to a shaft bearing assembly and also to an industrial gear unit (30) comprising this bearing assembly. The bearing assembly (34) comprises two taper roller bearings mounted axially spaced apart on the shaft (35) with the bearings orientated in an O arrangement in which the rollers of each bearing increase in diameter in the direction away from the other bearing of the pair. In a gear unit (30) the outer cup of the taper roller bearing may be located by an abutment shoulder (32) formed in the housing (11) whilst the inner cone of the taper roller may be located by a lock nut (40) on a threaded end portion of the shaft (35) or by a circlip (61) disposed in annular groove in the shaft (35).

Abstract: A bearing assembly includes a full type tapered roller bearing and a roller presser which prevents separation of the rollers not only during transportation but while the outer ring is not mounted. The roller presser includes a ring member, and a plurality of arms extending from one side of the ring member. Each arm is inserted in one of the triangular spaces defined by the tapered raceway of the outer ring and the adjacent tapered rollers. The arms press the rollers against the inner ring. A pair of diametrically opposed bridges are provided, each extending between the free ends of a pair of adjacent arms. The bridges engage two diametrically opposed rollers, thereby preventing separation of the rollers not only during transportation but also while the outer ring is not mounted.

Abstract: A tapered roller bearing comprises an outer race, an inner race, a plurality of tapered rollers, and a cage. A small-diameter end portion of the inner race is formed with a small flange portion for limiting axial movement of the tapered rollers and a cylindrical portion which has a less diameter than the small flange portion and is connected to an axial outer end of the small flange portion. The cage is formed at a small-diameter end portion thereof with a bent portion which is bent inward in a radial direction. A small-diameter end portion of the cage has a bent portion which is faced to an outer surface of the cylindrical portion of the inner race with a predetermined clearance therefrom such that a labyrinth is created between the cage and the inner race.

Abstract: A bearing assembly for a wheel assembly. In some constructions and in some aspects, the bearing assembly includes a housing defining a cavity therethrough, a first bearing cone positioned within the cavity and a second bearing cone positioned within the cavity and spaced from the first bearing cone. A first plurality of rollers is positioned between and engageable with the housing and the first bearing cone and a second plurality of rollers is positioned between and engageable with the housing and the second bearing cone. A seal seals the space between the first bearing cone and the second bearing cone. In some constructions and in some aspects, the seal is non-metallic or elastomeric.

Abstract: In a heat treatment wherein a blank (intermediate material) formed with a lubrication hole is heated and quenched, the quenching of the blank is terminated at the point of time that a temperature at a portion corresponding to a depth from a raceway surface (surface of a bearing part) of an outer ring (the bearing part), to which depth the maximum shear stress affects, is lowered to an MS point.

Abstract: A tapered roller bearing and an automotive gear shaft support device can ensure a long endurance life even in the state in which debris is mixed. On the surfaces of an outer ring, inner ring, and tapered rollers formed from carburized bearing steel having an oxygen content of 9 ppm or less, carbo-nitrided layers having a carbon content of 0.80 wt % or over, a Rockwell hardness HRC of 58 or over, and a residual austenite content of 25–35 vol % are formed to increase mechanical properties and fatigue characteristics of the parts and to stably maintain the carbo-nitrided layers on the surfaces of the parts to a quality having suitable toughness, thereby markedly improving the endurance life of the tapered roller bearing in a state in which debris is mixed.

Abstract: A swivel mounting is made as a double-row roller bearing and has an outer ring with a first outer track and a second outer track, a first inner ring with a first inner track, and a second inner ring with a second inner track which is located axially next to the first inner ring. Two sets of rollers roll between the outer tracks of the outer ring and the inner tracks of the inner rings. The swivel mounting is constructed such that the outer ring with the first inner ring and the second inner ring forms one axial slide bearing at a time.

Abstract: A seal assembly includes a protective shield, a seal and a seal wiper. A garter spring is located about the outer perimeter of the seal to provide a constricting force around the seal to assure that the lips contact the seal wiper even after deformation and wear of the seal assembly. Another seal assembly includes an integrally shielded seal manufactured of a non-metallic material.

Abstract: In a toroidal continuously variable transmission having a plurality of power rollers interposed between input and output disks under axial preload and using a tapered roller bearing as a power roller bearing, a radial load and a thrust load acting on an inner race are received or supported by way of the tapered roller bearing. An inner raceway surface formed on the inner race is located to be offset from a line of action common to a radial component of a contact pressure acting on a contact point between the inner race and the input disk and a radial component of a contact pressure acting on a contact point between the inner race and the output disk toward an outer race.

Abstract: In order to improve a seizure resistance as well as restricting of a dispersion of a rotation torque, surface roughness of a large diameter side end face (4A) of a tapered roller (4) is defined as a value satisfying both the following conditional expressions (1) and (2). 0.04 ?m?Ra(r)?0.1 ?m??(1) 0.8?Ra(r)/Ra(c)?1.1??(2) where, Ra(r) is an arithmetic average of roughness in a radial direction on the large diameter side end face of the tapered roller, and Ra(c) is an arithmetic average of roughness in a peripheral direction on the large diameter side end face of the tapered roller.

Abstract: A double row tapered roller bearing with vertex of contact angles outside of the bearing is externally fitted to an outer periphery of a hub wheel to which a wheel is attached. A shaft end of the hub wheel is deformed outwardly in a radial direction so as to be caulked to an outer end surface of an inner ring of the bearing. A raceway track of at least one of the inner ring and the outer ring in the bearing is designed so as to satisfy a condition that a predetermined form is secured in a state that the raceway track is elastically deformed by the caulking. As a result, satisfactory rolling performance of the tapered roller after the caulking is secured, and a predetermined life of the bearing apparatus after the caulking can be obtained.

Abstract: A roller bearing includes at least one inner ring and at least one outer ring, with at least one of the inner and outer rings being comprised of at least four segments. In addition, at least one of the segments is provided with a mechanism for moving the segment in the radial direction. This radial setting mechanism can be in the form of a cam that functions between the segment and a housing accommodating the segment.

Abstract: In a tapered roller bearing having an outer ring whose outside diameter is D, an inner ring whose inside diameter is d, and a plurality of tapered rollers whose pitch circle diameter is dm, a setting is provided such that a PCD parameter expressed by 2 dm/(D+d) is a value which falls within the range of 0.96 to 0.985.

Abstract: A system and method is provided for setting the roller clearance of a multi-row tapered roller bearing assembly via a clearance adjustment assembly and an outer retaining sleeve. The bearing assembly has multiple rows of tapered rollers disposed circumferentially between an inner sleeve and the clearance adjustment assembly, which is secured by the outer retaining sleeve. The clearance adjustment assembly has at least one clearance adjustment ring disposed adjacent multiple tapered support rings, which extend circumferentially about the multiple rows of tapered rollers. In the bearing assembly, the at least one clearance adjustment ring forces the multiple tapered support rings against the multiple rows of tapered rollers to set the desired roller clearance.

Abstract: According to this double row tapered roller bearing apparatus, an integral outer ring (2) is provided with oil vents (20) which extend from an inner peripheral face (17) in an area outward in an axial direction than a rolling face (2B) on which an axially outward row of conical rollers (7) rolls and passes through an outer peripheral face (18). Therefore, a portion of lubricating oil supplied from oil supply holes (13) in the integral outer ring (2) passes the oil vents (20) via the axially outward row of the conical rollers (7), and will be returned to a space in a housing (1) by way of a channel (31) in the housing (1). In conclusion, a circulating path of the lubricating oil through the outward row of the conical rollers (7) can be formed by the oil vents (20).

Abstract: A power roller for a toroidal continuously variable transmission includes: an inner wheel, an outer wheel a power roller bearing for bearing the inner wheel. The power roller bearing includes an inner wheel orbital face formed on the inner wheel, an outer wheel orbital face formed on the outer wheel, and a rolling element interposed between the inner wheel orbital face and the outer wheel orbital face. The rolling element is shaped into a frustum of a cone. A first contact is made between one of the following while a second contact is made between the other of the following: the rolling element and the inner wheel orbital face, and the rolling element and the outer wheel orbital face. The first contact is a point and the second contact is a line. Otherwise, the first contact is shorter in width than the second contact.

Abstract: The present invention provides a roller bearing in which a plurality of rollers is interposed between an inner ring member and an outer ring member, and a flange having a guide surface for guiding an end surface of the roller in a sliding contact manner is provided at an end portion of at least one of the inner ring member and outer ring member in an axial direction. Three-dimensional surface roughness of the end surface of the roller is defined to a value which satisfies conditional expressions of Sa≦0.1 &mgr;m and 0.15 &mgr;m≦Svk≦0.30 &mgr;m, where Sa is arithmetical average roughness based on rough curve and Svk is reduced valley depth based on the rough curve.

Abstract: A tapered roller bearing in which tapered rollers are interposed between an inner ring member and an outer ring member and a large diameter flange having a guide surface guiding a large diameter side end face of a tapered roller is provided in an end portion in an axial direction of the inner ring member. Microscopic streaked grinding trails are arranged in multiple directions on the large diameter side end face of the tapered roller.

Abstract: The invention relates to a shaft bearing assembly and also to an industrial gear unit (30) comprising this bearing assembly. The bearing assembly (34) comprises two taper roller bearings mounted axially spaced apart on the shaft (35) with the bearings orientated in an O arrangement in which the rollers of each bearing increase in diameter in the direction away from the other bearing of the pair. In a gear unit (30) the outer cup of the taper roller bearing may be located by an abutment shoulder (32) formed in the housing (11) whilst the inner cone of the taper roller may be located by a lock nut (40) on a threaded end portion of the shaft (35) or by a circlip (61) disposed in annular groove in the shaft (35).

Abstract: An assembly of a pair of roller bearings in which the inner bearing rings are axially spaced apart by a first member and the outer bearing rings are spaced apart by a second member with one of the inner or outer ring of each bearing being an axially outer bearing ring spaced axially further from the outer bearing than the other ring of that bearing. The method comprises forming an assembly of the two members and bearings in which one of the axially outer bearing ring is a loose fit on one of the first and second members, and then axially moving the axially outer bearing ring of the one bearing which is loose fit in a direction towards the other bearing to create a pre-load, and then increasing the degree of pre-load to effect elastic deformation of that ring and thereby create a shrink fit type interface load.

Abstract: A full complement antifriction bearing includes an inner race, an outer race, and rolling elements organized in a circular row between the races without a cage or retainer for separating the rolling elements. While the absence of a cage or retainers enable the bearing to have the maximum number of rolling elements and thus transfer greater loads, adjacent rolling elements contact each other. Each rolling element or every other rolling element is covered with a tribological coating that retards adhesive wear and reduces friction.

Abstract: A full complement taper roller bearing consists of an inner ring or cone having an inner track on its radially outer conical surface, and an outer ring or cup having an outer track on its radially inward conical surface and one or more rows of taper rollers having a contact angle of less than 30 degrees freely disposed between the inner and outer rings and guided between said tracks. Each row of rollers is axially located within a recess on the inner track defined by a shoulder abutment disposed at least at the edge of the inner track having the greatest diameter and each of the rollers is in contact with the inner track over the entire length of the taper roller in the axial direction of the bearing. A method of assembly is also enclosed.

Abstract: The invention relates to a roller bearing in which high edge stresses resulting from shaft misalignment can be mitigated or overcome. The invention provides a roller bearing comprising an inner, an outer ring and a plurality of bearing rollers disposed therebetween wherein the outer bearing ring has an axial end face and a grooved formed therein, the groove extending longitudinally about the axis of rotation of the bearing. The groove may be formed between the radially inner and outer edges of the end face or may be formed at the radially outer edge, and have the form of a chamfer. The groove may be continuous or discontinuous around the end face.

Abstract: A double row tapered roller bearing with vertex of contact angles outside of bearing is externally fitted to an outer periphery of a hub wheel to which a wheel is attached. A shaft end of the hub wheel is deformed outwardly in a radial direction so as to be caulked to an outer end surface of an inner ring of the bearing. A raceway track of at least one of the inner ring and the outer ring in the bearing is designed so as to satisfy a condition that -a predetermined form is secured in a state that the raceway track is elastically deformed by the caulking. As a result, satisfactory rolling performance of the tapered roller after the caulking is secured, and a predetermined life of the bearing apparatus after the caulking can be secured.

Abstract: A tapered roller bearing and an automotive gear shaft support device can ensure a long endurance life even in the state in which debris is mixed. On the surfaces of an outer ring, inner ring, and tapered rollers formed from carburized bearing steel having an oxygen content of 9 ppm or less, carbo-nitrided layers having a carbon content of 0.80 wt % or over, a Rockwell hardness HRC of 58 or over, and a residual austenite content of 25-35 vol % are formed to increase mechanical properties and fatigue characteristics of the parts and to stably maintain the carbo-nitrided layers on the surfaces of the parts to a quality having suitable toughness, thereby markedly improving the endurance life of the tapered roller bearing in a state in which debris is mixed.

Abstract: In a tapered roller bearing having an outer ring whose outside diameter is D, an inner ring whose inside diameter is d, and a plurality of tapered rollers whose pitch circle diameter is dm, a setting is provided such that a PCD parameter expressed by 2 dm/(D+d) is a value which falls within the range of 0.96 to 0.985.

Abstract: Tapered rolling bearing (1) which presents an inner race (2) which is provided with a guiding rim (5) along one of its own sides; a ground rolling surface (7) which is radially obtained outside the inner race (2) and which is axially delimited by the guiding rim (5); a crown of tapered rollers (4), each of which is suitable for rolling in contact with the rolling surface (7) and which is extremely close to the guiding rim (5); and a grinding relief (8), which is obtained between the rolling surface (7) and the guiding rim (5) in order to permit the grinding of the rolling surface (7) itself, and which is provided with an annular outlet edge (9) which confines with the rolling surface (7); the annular outlet edge (9) of the grinding relief (8) being arranged at a determined distance from the rolling surface (7), said distance being measured transverse to the rolling surface (7) itself.

Abstract: The present invention provides a roller bearing in which a plurality of rollers is interposed between an inner ring member and an outer ring member, and a flange having a guide surface for guiding an end surface of the roller in a sliding contact manner is provided at an end portion of at least one of the inner ring member and outer ring member in an axial direction. Three-dimensional surface roughness of the end surface of the roller is defined to a value which satisfies conditional expressions of Sa≦0.1 &mgr;m and 0.15 &mgr;m≦Svk≦0.30 &mgr;m, where Sa is arithmetical average roughness based on rough curve and Svk is reduced valley depth based on the rough curve.

Abstract: The large-end-face roughness &sgr;1 of the tapered roller is set to be not less than 0.04 &mgr;mRa, consequently the assembling torque becomes generally constant and smaller in fluctuation over a range that the cone-back rib face roughness &sgr;2 is 0.03-0.23 &mgr;mRa. Also, the composite roughness &sgr;=(&sgr;12+&sgr;22)½ is set to be not more than 0.17 &mgr;mRa, consequently the preload retention rate on the regression curve can be made 90%. Further, the radius of curvature ratio R1/R2 resulting from dividing the convex radius of curvature R1 of the large end face of the tapered roller by the concave radius of curvature R2 of the cone-back rib face of the inner ring is set to be not more than 0.35, consequently the rotating torque becomes smaller in variation and also smaller in fluctuations over a range that the composite roughness &sgr; is 0.05-0.22 &mgr;mRa.

Abstract: A vehicle wheel hub with a flange by which a wheel is mounted, the hub being supported by a knuckle and rotated through a universal joint, such as a CV joint, the CV joint having an outer joint member or shell with a cylindrical end having an end face. Axially spaced inboard and outboard tapered roller bearing members are positioned between the hub and the knuckle. The inboard bearing member has a cone with a raceway and a back face but no thrust rib. The shell cylindrical end face abuts the inboard cone back face and is adapted to engage the back faces of tapered rollers of the inboard roller bearing member to serve as a thrust rib for the inboard bearing member.

Abstract: A wheel hub assembly for an automotive vehicle has a spindle with a flange by which a wheel is mounted, the spindle being supported by a support member and being rotated through a universal joint. Axially spaced inboard and outboard bearing members are positioned between the spindle and the support member. The spindle has a tapered raceway forming a cone of the outboard bearing member, the raceway lying inboard of the flange. The outboard bearing member cone raceway has no thrust rib at its large, outboard end, and a large radius is provided between the outboard end of the raceway and the flange. An outboard bearing member cup has a raceway tapered complementarily to the cone raceway and a thrust rib at its outboard end. Preferably, the inboard bearing member has a cone with no thrust rib, and a cup with a thrust rib.

Abstract: An antifriction bearing includes a plurality of rolling elements each having a lateral surface possessing a conical shape, with the rolling elements being positioned between a conical raceway and a cylindrical raceway to roll along the conical raceway and the cylindrical raceway. The lateral surface of each rolling element forms an angle with a center axis of the rolling element that is 3° at maximum, and the lateral surface of each rolling element has a convex curvature that is superimposed on the conical shape. The bearing can also include a first bearing ring having a running surface constituting one of the conical and cylindrical raceways. An antifriction bearing arrangement incorporating such an antifriction bearing is also provided with a stop element having a stop face contacting the end face of each of the rolling elements.

Abstract: A tapered roller bearing comprises inner and outer and outer rings having raceways, a large flange surface and a small flange surface, tapered rollers between the raceways and each having large and small end faces at the ends, and a retainer for the tapered rollers. The average roughness of the large end faces and the large flange surface is 0.14 &mgr;m Ra or less. The radius of curvature of the large end faces is 75 to 85% of the roller reference radius, and the central angle of the contact positions between the tapered rollers and the large flange surface is {fraction (1/15)} to {fraction (1/10)} of the roller angle. The center of the contact surface between the tapered rollers and the raceways is offset toward the large end faces from the center of the rolling surfaces of the tapered rollers by 10% or less of the effective length of the tapered rollers.