Abstract: A needle bearing functioning as a rolling element comprises a uniform-diameter body part and bottom surfaces shaped in flat surfaces. A tapered reduced-diameter part and a chamfered part are interposed between the body part and the bottom surface. A gentle reduction in diameter is first made by the tapered reduced-diameter part, and then a relatively sharp reduction in diameter is made by the chamfered part. Consequently, in the needle bearings adjacent to each other, their tapered reduced-diameter parts are separated from each other.

Abstract: A split roller bearing comprising an inner ring including an inner race, an outer ring including an outer race, a cage mounted between the inner and outer races, said cage mounting t rollers which engage the inner and outer races, said inner ring and inner race, outer ring and outer race, and cage each comprising two substantially 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 race, and cage, may be separated from one another to allow the roller bearing to be dismantled when worn without removal of the component supported by the bearing.

Abstract: A bearing assembly is provided having a roller bearing with an inner race fitted around the journal portion of an axle. An outer raceway combines with the inner raceway to receive roller elements. A backing ring is centered to the shaft fillet. Tapered roller elements are located between and contact the inner and outer raceways. A cage is comprised of an inner ring, and outer ring, and a plurality of pocket bars and support pocket bars extending between the inner and outer rings. The support pocket bars have an overall greater thickness than the pocket bars. The cage is a generally unitary structure comprised of a nylon resin material with a fiber fill.

Abstract: A bearing assembly is provided having a roller bearing a cone forming an inner race fitted around the journal portion of an axle. A cup forms an outer raceway that combines with the inner raceway to receive roller elements. A backing ring is centered to the shaft fillet. Tapered roller elements are located between and contact the inner and outer raceways. A cage is comprised of an inner ring, and outer ring, and a plurality of pocket bars extend between the inner and outer rings. The pocket bars of the cage include a protrusion that is received in a groove in the cone.

Abstract: A tapered roller bearing includes bearing rings including an inner ring and an outer ring, a roller rolling between the inner ring and the outer ring, and a cage having a pocket holding the roller and located adjacent to the outer ring. A radial clearance ? between the cage and the outer ring when the cage is in a neutral position, a radial clearance ?pr between the roller held in the pocket and the cage, and a circumferential clearance ?pc between the roller held in the pocket and the cage satisfy relations ?pr>?pc and ?2?(???pr)/(?pr??pc)?0.

Abstract: To prevent abrasion of an end surface on a large flange portion side of an inner race and abrasion of an end surface of a flange portion of a mating member, a tapered roller bearing includes a washer fixed to the end surface on the large flange portion side of the inner race. A dimensional tolerance between the inner race and the washer, which is required when the washer is fixed to the inner race, is increased to reduce processing cost and to facilitate fixation work of the washer to the inner race.

Abstract: A bearing cartridge for a rotatable shaft of a wind turbine comprising a shaft and a back-to-back tapered roller bearing arrangement coupled to the shaft. The bearing arrangement comprising a first bearing having a first outer ring, a first inner ring and a plurality of tapered rollers; and a second bearing having a second outer ring, a second inner ring and a plurality of tapered rollers. The bearing cartridge further comprising a gear located on the shaft between the first bearing and second bearing and a sleeve for supporting an axial load between the first and second bearings and having one or more apertures that expose the gear for coupling to an external gear.

Abstract: A bearing arrangement has at least two anti-friction bearings which are spaced apart along a central axis. At least one bearing is configured as a tapered roller bearing, the tapered roller bearing having a number of frustoconical rolling bodies. A cone angle between a line of symmetry of each rolling body and the central axis is between 20° and 33°.

Abstract: A tapered cylinder portion, a radially extending portion, a cylindrical portion, a center backup portion, and a large diameter side curved portion are formed from an integral metallic plate.

Abstract: A tapered roller bearing according to the invention is such that when an arithmetical mean roughness as a surface roughness of a large end face of a tapered roller is ?1 and an arithmetical mean roughness as a surface roughness of a large rib surface of an inner ring is ?2, ?1 is 0.04 ?m or larger, and a composite roughness that is expressed by a square root of a sum of a squared value of ?1 and a squared value of ?2 is 0.17 ?m or smaller. Raceway surfaces of an outer ring and the inner ring and a rolling contact surface of the tapered roller are crowned, and a total crowning amount is set to 50 ?m or larger, an outer ring crowning rate is set to 40% or larger, and a roller crowning rate is set to 20% or smaller.

Abstract: A roller bearing assembly is provided which is adapted to enhance lubrication performance for preventing seizure and for reducing frictional torque during rotation. The roller bearing assembly includes an inner ring (1), an outer ring (2) and a roller (3) rollably interposed between these inner and outer rings. The inner ring (1) is formed with a rib (4) making contact with a greater end face (7) of the roller (3) for guiding the rolling motion of the roller (3). A recess (5) is formed centrally of the greater end face (7) of the roller (3). A stopper member (6) for preventing oil invasion is fitted in the recess (5) of the roller (3).

Abstract: In a tapered roller bearing, LWR/DW is in the range of 1.1 to 1.7 where LWR represents a roller effective length of tapered rollers and DW represents a roller mean diameter of tapered rollers. RCO/LRO is 30 to 150, and RCI/LRI is 50 to 260 where RCO represents a crowning radius of an outer ring, LRO represents a raceway length of the outer ring, RCI represents a crowning radius of an inner ring and LRI represents a raceway length of the inner ring. The following expressions are satisfied: 20°???30°, and ??0.87??0.334?BK???0.87??0.167, where ? represents a raceway angle of the outer ring, ? represents a roller angle of the tapered rollers, and BK represents a rib angle of a large rib portion of the inner ring.

Abstract: The invention relates to a four-row tapered roller bearing for machine mountings, with an inner ring of two-part design axially and on outer ring of single- or multi-part design axially, with an inner and/or an outer tapered-roller row, being supported in each case by an inner ring part. In order, firstly, to confer a large supporting width on the bearing and, secondly, to ensure as optimum as possible and as uniform as possible a loading of the rolling bodies in the form of the tapered rollers, the tapered-roller rows are arranged in an O-arrangement, and the roller axles or the respectively adjacent outer and inner tapered rollers of the two respectively adjacent outer and inner tapered-roller rows are arranged at an inclination in such a manner that those lines of influence of the tapered rollers which characterize the pressure angles intersect in the region of the axis of rotation of the tapered roller bearing.

Abstract: A tapered roller bearing of the type having a protrusion on the retainer that is axially brought into engagement with the flange of the inner race is provided, wherein no stress concentration occurs on the flange of the inner race, which guide the tapered rollers and which is small and has a large load bearing capacity. The inner race 2 has a flange 6 for guiding the tapered rollers 4 only at the large-diameter end of the raceway 2a. The retainer 5 has on the large-diameter side thereof a protrusion 7 radially inwardly extending and axially engaging the flange 6 of the inner race 2.

Abstract: The object is to provide a miniature-sized tapered roller bearing that includes an inner race having an inner diameter of not more than 9 mm and that ensures high dynamic load rating. The ratio of the average diameter DRAVE of the tapered rollers 3 to the inner diameter DIi of the inner race 1, i.e. DRAVE/DIi is set to 0.45 to 0.70 to ensure high dynamic load rating with a miniature-sized tapered roller bearing of which the inner race 1 has an inner diameter of not less than 9 mm.

Abstract: A bearing assembly comprises a bearing enabling a rotatable body to rotate about a rotational axis relative to a stationary body. The bearing includes a bearing inner ring and a bearing outer ring, each having at least first and second roller body tracks provided in or on non-parallel surfaces of the ring. The respective roller body tracks of the bearing outer ring are aligned with the respective roller body tracks of the bearing inner ring and a row of roller bodies is disposed between each of the respective sets of roller body tracks. At least one of the rows of roller bodies comprises one of tapered rollers and spherical rollers, at least one of the rows of roller bodies supports at least axial forces and at least one of the rows of the roller bodies supports at least radial forces.

Abstract: A tapered roller bearing comprises an inner ring having a conical surface-like raceway surface in it outer periphery and formed with a cone back face rib and a cone front face rib on the opposite sides of the raceway, an outer ring having a conical surface-like raceway in its inner periphery, a plurality of tapered rollers interposed between the raceways of the inner and outer rings, and a cage for holding the tapered rollers in predetermined circumferential intervals, wherein the ratio R/RBASE of the radius of curvature R of the large end face (32) of the tapered roller (30) to the distance RBASE from the apex of cone of the tapered roller (30) to the cone back face rib surface (18) of the inner ring (10) is set at 0.75 to 0.87, and the end face deflection of the large end face (32) of the tapered roller (30) is 3 ?m or less.

Abstract: The invention refers to a bearing unit and a method for its manufacture incorporating an outer race ring (1), an inner race ring (4) having an inner envelope surface with an axially tapering saw-tooth profile (6), a thin-walled axially slotted sleeve (7), having a tapering saw-tooth profile (9) on its outer envelope surface, cooperating with the saw-tooth profile (6) in the inner race ring (4) for increasing and decreasing the grip of the thin-walled sleeve against a shaft, when inner race ring (4) and sleeve (7) are mutually displaced, a flange (10) connected to the sleeve (7) and having tightening means (11) operable to cause the displacement between sleeve (7) and inner race ring (4), rolling bodies (12) positioned between inner and outer race rings, wherein the surface of the inner race ring (4) presenting the tapering saw-tooth profile (6) has been subjected to a turning operation followed by hardening.

Abstract: A two-row tapered roller bearing includes an outer ring (1) having an outer diameter of at least one meter, a first inner ring (2) and a second inner ring (3) that is disposed axially adjacent the first inner ring (2). A first set of conically-formed roller bodies (4) roll between the outer ring (1) and the first inner ring (2) and a second set of conically-formed roller bodies (5) are disposed axially adjacent the first roller bodies (4) and roll between the outer ring (1) and the second inner ring (3). A first sealing ring (11) is disposed axially adjacent the outer ring (1), is connected with the outer ring (1) and slips on a slip surface (16) of the first inner ring (2) in a contacting manner.

Abstract: An axial radial bearing for a rotor shaft of a wind power installation, which has a vertical circular outer disk, inner ring arranged coaxially to the outer disk, and two circular shaft washers axially arranged on both sides of the outer disk. At least one row of rolling bodies, held at equal distances by a bearing cage, extends between the shaft washers and outer disk, forming the rolling bearings for receiving axial forces, while at least one other row of rolling bodies, optionally held at equal distances by another bearing cage, is arranged between the outer disk and inner ring, forming a third rolling bearing for receiving radial forces. The two rolling bearings for receiving radial forces are formed by two tapered roller bearings oriented towards the longitudinal axis of the bearing by the small front sides, or by a double-row angular ball bearing or by two axial ball bearings.

Abstract: Provided is a tapered roller bearing in which strength of a flange portion for receiving larger end surfaces of tapered rollers is ensured and the tapered rollers have a longer axial length so as to increase load rating. The tapered roller bearing includes: an inner race (51); an outer race (52); a plurality of tapered rollers (53) arranged so as to be rollable between the inner race (51) and the outer race (52); a retainer (54) for retaining the tapered rollers (53) at predetermined circumferential intervals; and a flange portion (56) provided only on a larger diameter side of a radially outer surface of the inner race (51), for guiding the tapered rollers (53). The retainer (54) includes: a larger-diameter-side annular portion (54a); a smaller-diameter-side annular portion (54b); and brace portions (54c) for coupling the larger-diameter-side annular portion (54a) and the smaller-diameter-side annular portion (54b) with each other.

Abstract: Bearing assembly (1) for supporting a transmission shaft (2) in a housing (3), comprising an axially non-locating bearing (5) and a pair of angular contact bearings (7,8) which locate the shaft (2) against movement in axial direction (AA?), whereby the shaft (2) is subjected to radial and/or axial load forces (Frad,Fax), characterized in that the housing (2) is adapted in order to obtain the desired stiffness for each of the two angular contact bearings (7,8), whereby a load sharing between said two bearings (7,8) is induced.

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 (2, 3) and a cage (5) for holding the tapered rollers (4) at predetermined circumferential intervals, wherein (the circumferential length on the PCD)?(roller diameter×the number of rollers)<roller diameter. Further, the tapered rollers (4) are uniformly disposed such that the distance between rollers on the PCD is less than (the roller diameter/the number of rollers).

Abstract: A roller bearing cage is made of a resin and has a tapered tubular shape as a whole. In the roller bearing cage, tapered rollers are forcibly fitted to pockets while elastically deforming pillar portions at a small-diameter annular portion side. A stress alleviating portion is provided on at least an outer circumferential side of an end of the pillar portion at the small-diameter annular portion side so that a portion of the pillar portion from a crossing portion between the pillar portion and the small-diameter annular portion to a side of the large-diameter annular portion is linearly cut, thereby alleviating the stress occurring in the pillar portion when the tapered roller is forcibly fitted to the pocket.

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 steering apparatus for a vehicle. It includes a housing with a steering shaft having a longitudinal axis. A first bearing is interposed between the shaft and the housing, permitting rotation of the steering shaft about the axis. There is also a first wedge-shaped member that has a thin end against the first bearing and a means for biasing the first wedge-shaped member against the first bearing to take up play between the shaft and first bearing, and play within the first bearing.

Abstract: A journal bearing assembly includes a journal shaft configured to be mounted in a pulverizer. The journal shaft has a lower bearing receiving surface proximate a lower end thereof, and an upper bearing receiving surface spaced apart from the lower bearing receiving surface axially. A lower journal bearing is mounted on the lower bearing receiving surface of the journal shaft. An upper journal bearing is mounted on the upper bearing receiving surface of the journal shaft. An upper journal housing is mounted on the upper journal bearing for rotational movement relative to the journal shaft. A lower journal housing is mounted on the lower journal bearing for rotational movement relative to the journal shaft. The lower journal housing is mounted to the upper journal housing for common rotation about the journal shaft. The journal bearing assembly has a loading point defined between the upper and lower journal bearings.

Abstract: A valve system includes a conduit having a flow of fluid therethrough, and a butterfly valve assembly. The butterfly valve assembly includes a shaft extending obliquely within the conduit, a butterfly disk, and a first bearing assembly positioned on an external surface of the conduit. The butterfly disk includes a passage sized to receive the shaft therethrough, wherein the butterfly disk is operable to restrict the fluid flow through the conduit when the butterfly valve assembly is in the closed position. The first bearing assembly is configured to receive a first end of the shaft therethough, wherein the first bearing assembly includes a plurality of tapered roller bearings circumferentially-spaced within a bearing race and configured to maintain the butterfly disk at a substantially constant axial position when the butterfly valve assembly is in the closed position.

Abstract: A bearing assembly is provided having a roller bearing with an inner race fitted around the journal portion of an axle. An outer raceway combines with the inner raceway to receive roller elements. A backing ring is centered to the shaft fillet. Tapered roller elements are located between and contact the inner and outer raceways. A cage is comprised of an inner ring, and outer ring, and a plurality of pocket bars and support pocket bars extending between the inner and outer rings. The support pocket bars have an overall greater thickness than the pocket bars. The cage is a generally unitary structure comprised of a nylon resin material with a fiber fill.

Abstract: The wear resistance of a bi-directional tapered roller bearing is improved by applying a tribological coating to both the small and large end faces of the roller and to at least one of the rib faces of the bearing assembly.

Abstract: A drive axle assembly is provided with a reduced part count and improved alignment. The assembly includes a drive axle housing with input and output shafts and an inter-axle differential that is driven by the input shaft. The inter-axle differential is drivingly coupled to the output shaft and divides power between first and second axles. The output shaft is a unitary member and defines a yoke at one end disposed outside of the drive axle housing and restrained against axial movement within the drive axle housing. A bearing set is disposed between the output shaft and the drive axle housing and includes first and second bearing cones and a unitary bearing cup. The bearing cup includes threads that engage corresponding threads in the drive axle housing.

Abstract: The present invention provides a tapered roller bearing that can achieve improvement in manufacturability and a longer life. The tapered roller bearing of the present invention includes an outer ring 22, an inner ring 21, a plurality of tapered rollers 23 disposed between raceways of the inner ring and the outer ring, and a cage 24 that holds each tapered roller. A shoulder section 26 that receives a large end face 23b of the tapered roller 23 is provided on a large-diameter side of the inner ring 21 such as to project towards an outer-diameter side. A raceway 25 that reaches from the shoulder section 26 to the small diameter end is formed. An engaging section 36 that engages with the shoulder section 26 on the inner ring 21 is provided on a large-diameter side of the cage 24 such as to project towards an inner diameter direction. The engaging section 36 is disposed such as to fit within a width of a corresponding pocket 24d when viewed from an axial direction.

Abstract: A tapered roller bearing is designed to have a roller loading ratio in the range of 0.7 to 0.92 and a ratio of roller length to roller diameter in the range of 1.1 to 1.7 whereby oil agitation loss and rolling viscous resistance are reduced for achieving the reduction of running torque. Crownings are provided which are designed to have an outer-ring crowning parameter (=RCO/LRO) in the range of 30 to 150 and an inner-ring crowning parameter (=RCI/LRI) in the range of 50 to 260, provided that RCO denotes the radius of an outer ring crowning, LRO denotes the raceway length of an outer ring, RCI denotes the radius of an inner ring crowning and LRI denotes the raceway length of an inner ring. Thus, the rolling viscous resistance is reduced for achieving the reduction of running torque.

Abstract: In a bearing unit for a drive shaft mounted cantilevered in a housing by means of two rolling bearings and having a driving bevel gear wherein the drive shaft is mounted in the drive housing via a bearing bush and the bearing bush is axially supported at one end by a bearing bush support part and the rolling bearings are supported in the bearing bush spaced from the one end thereof so that, during heating, the bearing bush expands inwardly toward the driving bevel gear mounted on the shaft whereas the drive housing expands outwardly away from the driving bevel gear, the gear drive housing and the bearing bush consist of a light metal alloy and the bearing bush support part consists of an iron material.

Abstract: A shielding plate for controlling the entry of oil between an inner ring and an outer ring is provided in the vicinity of an opening between the inner ring and the outer ring which lies a side where oil enters. In addition, a fluid accommodating plate for accommodating therein oil is provided in the vicinity of an opening between the outer ring and the inner ring which lies on a side where oil exits.

Abstract: In a tapered roller bearing, the roller coefficient ? is greater than 0.94. At least one member of an inner ring (2), an outer ring (3), and the tapered rollers (4) includes a nitrogen-rich layer, and the grain size number of austenite crystal grains in the nitrogen-rich layer is greater than 10. A surface of a cone back face rib (2b) of the inner ring (2) includes: a conical surface (a) in contact with large end faces (4a) of tapered rollers; and a flank (b) that smoothly extends outwardly from the conical surface and is curved in a direction away from the large end faces (4a) of the tapered rollers. A cage (5) includes: a small annular portion (6) continuous on the small end face side of the tapered rollers (4); a large annular portion (7) continuous on the large end face side of the tapered rollers (4); and a plurality of bars (8) that connect the small and large annular portions.

Abstract: A tapered roller bearing includes a cage 5 composed of a first annular portion 20, a second annular portion 21 positioned on a larger-diameter side of a tapered raceway surface 12 of an inner ring 2 in an axial direction, and pillar portions that couple the first annular portion 20 and the second annular portion 21 to each other. A tapered roller contact members 6 which has a portion in contact with a second end face 31, i.e., a larger-diameter end face of the tapered roller 3 and which is made from a material having lubricating oil-permeating property is fixed to an outer circumferential surface of the second annular portion 21 so as to provide a clearance to an inner circumferential surface of an outer ring 1.

Abstract: A tapered roller bearing comprises an inner ring having a conical surface-like raceway surface in it outer periphery and formed with a cone back face rib and a cone front face rib on the opposite sides of the raceway, an outer ring having a conical surface-like raceway in its inner periphery, a plurality of tapered rollers interposed between the raceways of the inner and outer rings, and a cage for holding the tapered rollers in predetermined circumferential intervals, wherein the ratio R/RBASE of the radius of curvature R of the large end face (32) of the tapered roller (30) to the distance RBASE from the apex of cone of the tapered roller (30) to the cone back face rib surface (18) of the inner ring (10) is set at 0.75 to 0.87, and the end face deflection of the large end face (32) of the tapered roller (30) is 3 ?m or less.

Abstract: A bearing arrangement of a roller-mounted unbalanced mass shaft. The rollers are in punctiform contact with one of the raceways at a low shaft rotational speed and in linear contact with both raceways at a high shaft rotational speed.

Abstract: A method for assembling a taper roller bearing, wherein a radially expandable and retractable clamping tool acts to retain the rollers of the roller bearing, a final assembly is formed by putting the inner and outer rings of the roller bearing together, and the clamping tool is subsequently withdrawn.

Abstract: A tapered roller bearing includes a retainer formed with a plurality of trapezoidal pockets. Each pocket includes cutouts formed in the crossbars defining each pocket near the narrow end thereof. A tapered roller is received in each pocket with its small-diameter end facing the narrow end of the pocket. Lubricating oil flowing into the bearing space defined radially inwardly of the retainer can quickly flows through the cutouts into the bearing space defined radially outwardly of the retainer at the narrow end of each pocket. Thus, it is possible to reduce the amount of lubricating oil flowing along the raceway of the inner ring to the large-diameter flange, and thus reduce the amount of lubricating oil remaining in the bearing, thereby reducing the torque loss due to rotational resistance of the bearing resulting from lubricating oil remaining in the bearing.

Abstract: A bearing design for a roller finger follower assembly includes an outer arm having a pair of openings, a shaft extending across the outer arm through the openings, a pair of lateral follower rollers mounted at opposite ends of the shaft; and a pair of bearings rotatably supporting the lateral follower rollers. The shaft is not a member of the bearing. Therefore, a force acting on the rollers travels through the rollers directly into the bearing and into the outer arm which reduces the potential for the rollers to become detached from the shaft. An inboard bearing design involves an inner bearing race integrated into the rollers. An outboard bearing design involves an inner bearing race integrated in the outer arm and an outer bearing race integrated into the rollers.

Abstract: A pinion shaft is supported in a housing by two tapered roller bearings which are arranged separately from each other in an axial direction, and these two tapered roller bearings are lubricated with lubricating oil in the housing in oil bath lubrication method. A labyrinth forming member in a disc-like shape is disposed with respect to a backward tapered roller bearing out of the two tapered roller bearings, on an end face at a small diameter side of an inner ring thereof in a press-contact manner, so as to be opposed to a rib part which is formed inwardly in a radial direction at a small diameter end of a cage. In this manner, a labyrinth structure for restricting a flow of the lubricating oil is formed between the rib part at the small diameter end side of the cage and the labyrinth forming member.

Abstract: To provide a tapered roller bearing assembly for supporting a vehicle wheel, in which stress concentration in the vicinity of a collar adjacent a hub flange is lessened to improve the durability, the assembly includes an outer member (1) having a plurality of tapered rolling faces (1a), an inner member (2) having a corresponding number of tapered rolling faces (2a), a corresponding number of rows of tapered rollers (4). The inner member (2) includes a hub axle (3) with a hub flange (10) adjacent an outboard end, and a single row inner race (5) mounted externally on an inboard end of the hub axle (3). The rolling faces (2a) are formed on the hub axle (3) and the single row inner race (5). A collar ring (6) in contact with the large ends of the tapered rollers (4) of the outboard row is provided as a flange ring (6) separate from the hub axle (3) and fitted on the hub axle (3) at a position adjacent the hub flange (10).

Abstract: Roller bearings, and struts and gas turbine engines using such bearings are provided. In this regard, a representative roller bearing for a gas turbine engine includes: a roller having a rolling surface and an end; a race having a flange and defining a raceway, the raceway terminating at the flange, the raceway being operative to receive the roller such that the rolling surface of the roller engages in rolling contact with the raceway; and a hard coating applied to the flange such that the end of the roller engages in sliding contact with the coating.

Abstract: A vehicle wheel bearing apparatus with a back-to-back double row tapered roller bearing has an outer member integrally with a body mounting flange and double row outer raceway surfaces tapered open respectively axially inward and outward. An inner member include a wheel hub and an inner ring or an outer joint member of a constant velocity universal joint. The wheel hub has a wheel mounting flange and one inner raceway surface arranged oppositely to one of the double row outer raceway surfaces and a cylindrical portion. The inner ring or the outer joint member of a constant velocity universal joint are press fit onto the cylindrical portion and include the other inner raceway surface arranged opposite to the other raceway surface of the double row outer raceway surfaces. Double row tapered rollers are freely rollably held between the outer and inner raceway surfaces by cages. Seals are arranged in annular openings formed by the outer and inner members. The cages are formed of synthetic resin.

Abstract: According to the invention, there is provided a tapered roller bearing in which, where D represents a larger end diameter of the tapered roller and L represents a roller length thereof, the roller length L is 18 mm or smaller, and a ratio of the large end diameter and the roller length of the tapered roller which is expressed by D/L is in the range of 0.55 to 0.9. In addition, respective raceway surfaces of the outer ring and the inner ring and rolling contact surfaces of the tapered rollers are crowned, and a total crowning amount is set to be 50 ?m or larger, an outer ring crowning rate is set to be 40% or larger, and a roller crowning rate is set to be 20% or smaller.

Abstract: A tapered roller bearing according to the invention is such that the surface hardnesses of a raceway surface of an inner ring and rolling contact surfaces of tapered rollers are set to 63 to 69HRC. In addition, respective raceway surfaces of an outer ring and the inner ring and the rolling contact surfaces of the tapered rollers are crowned and are set such that a total crowning amount is 50 ?m or larger, an outer crowning rate is 40% or larger and a roller crowning rate is 20% or smalled.

Abstract: The invention relates to a double-row angular contact anti-friction bearing having a split outer bearing ring, a one-piece inner bearing ring, and anti-friction bodies located in two rows between the two rings. The outer bearing ring is split axially into two individual rings. To permit simple, reliable and secure transport of the bearing, the individual outer bearing rings are interconnected by a connecting element in a positive fit that allows play and the outer surfaces of the individual rings have at least one recess, which is spanned by the connecting element. At least the recess of an individual ring has a groove, in which a hook element on the connecting element engages in a positive fit and the individual rings can be twisted in relation to one another.

Abstract: A gear unit includes a housing, two shafts arranged parallel with one another and each supporting a helically cut toothed gear, and two pairs of bearings supported by or relative to the housing in an arrangement in which each pair of bearings rotatably supports a shaft with the toothed gears of the two shafts being rotatable one relative to the other in mutual engagement. Two bearings of the two shafts lying to a common side of the inter-engaged helical gears are supported by a substantially common wall section of the gear unit housing, one of the two bearings being arranged to transmit to the housing wall section axial forces acting in a direction from the gears to the bearing and the other bearing being arranged to transmit to the wall section axial forces acting in a direction from the other bearing to the gears.