Abstract: The invention relates to a method of forming a roller bearing cage comprising: forming a planar strip of material, having a length corresponding to a circumferential dimension of a roller bearing cage; forming openings in the planar strip, corresponding to positions at which rollers are to be located; forming a plurality of tangs, alongside and part of each side of the length of the planar strip, each tang having a first tang edge of a first length adjoining the strip and a second edge of a second length opposite the first tang edge; and bending each side of the length of the strip such that the plurality of tangs is positioned at an angle with respect to the planar strip, wherein the fold is through an angle of greater than 90° and less than or equal to 180° relative to the plane of the planar strip.

Abstract: The invention relates to a rolling element bearing cage formed of one or more segments, each segment comprising: a supporting frame having a plurality of spaced apart openings each for accommodating a rolling element; and a reinforcing frame, inserted within the supporting frame, having a corresponding plurality of openings each for aligning with the openings of the supporting frame.

Abstract: The invention relates to a roller bearing cage comprising: a first annular ring; a second annular ring; at least one retainer portion attaching the first annular ring to the second annular ring to form the first and second annular rings in a cylinder-type structure; and a plurality of resilient tangs on each of the first and second annular rings, each tang protruding from the circumference of the respective annular ring at an angle with respect to the plane of the respective annular ring and toward the other annular ring.

Abstract: A rolling bearing includes an inner ring, an outer ring, a plurality of rolling elements disposed between the inner ring and the outer ring, and a plurality of cage segments separating circumferentially adjacent ones of the plurality of rolling elements. Each of the cage segments has an axial bridge portion and side plates at axially opposite ends of the bridge portion, each of the side plates having a convex end and a concave end circumferentially spaced from the convex end. The convex end of a first one of the side plates contacts the concave end of a second one of the side plates.

Abstract: A roller bearing (21) includes a plurality of needle rollers (23), a cage (24) that retains the rollers (23), and an outer ring (22) that has a rolling surface on which the rollers roll and is split in the circumferential direction. The cage (24) includes split sections (32a), (32b) at which the cage can be split in the circumferential direction. The cage (24) is of a roller riding type or an inner land riding type.

Abstract: A tapered roller bearing includes cage segments each having a pocket that retains one conical rolling element. The pocket is formed by two mutually-opposing circumferential bridges, which each extend between first and second circumferential ends of the cage segment, and at least two mutually-opposing connecting bridges, which connect the two circumferential bridges. The circumferential and connecting bridges have pocket sides, which delimit the pocket. The connecting bridges disposed in the region of the first and second circumferential ends each have a concavely-shaped first guide surface on their pocket and circumferential sides that partially enclose one rolling element. When a rolling element is disposed between the first circumferential end of one cage segment and the second circumferential end of the adjacent cage segment, the circumferential bridges of the two adjacent cage segments do not touch during operation.

Abstract: A cage for a roller bearing includes a first annular portion and a second annular portion opposite the first annular portion and a plurality of pillars interconnecting the first annular portion and the second annular portion. Adjacent pairs of the pillars each define a pocket for holding rollers. Each of the pockets is configured to receive at least one roller. One or more radially outward facing concave roller support surface is formed in one or more of the pillars at a position proximate a radially outer edge of the pillar. The concave roller support surface is configured to radially outwardly support a portion of one of the rollers.

Abstract: A prong type resin cage includes: an annular portion; and multiple cage bars. Each cage bar has a roller guide face formed in each opposed face thereof, the opposed face being opposed to an outer peripheral face of a corresponding one of rollers. The roller guide face is used for roller guide by the outer peripheral face at a rotational speed equal to or lower than a prescribed rotational speed. A cage outer face including an outer peripheral face of the annular portion and radially outer faces of the cage bars has outer ring guide faces of which diameter is increased radially outward by a centrifugal force to decrease a radial clearance between the outer ring guide faces and an inner peripheral face of the outer ring, so that outer ring guide by the inner peripheral face is carried out, at a rotational speed higher than the prescribed rotational speed.

Abstract: Surface indentation and oil film shortage on rollers is prevented and longer service life of a roller bearing is achieved, by preventing wear debris from being caught and accumulated in pockets of a holder of the roller bearing. Positions and dimensional relations of the diameters of inner and outer ring raceways, the inner and outer diameters of the holder, and inner and outer protrusions which are provided to pillar parts of the holder to prevent the rollers from coming off are defined such that the inner and outer protrusions of the pillar parts always do not come into contact with the outer circumferential surfaces of the rollers in the state where the rollers and the holder are incorporated between inner and outer members. As a result, lubricant oil is smoothly circulated in gaps formed between the outer circumferential surfaces of the rollers and the pillar parts of the holder.

Abstract: A roller bearing comprises an outer ring, an inner ring, a plurality of rollers arranged between the outer ring and the inner ring, and a plurality of retainer segments having a plurality of column parts extending in a direction along a shaft so as to form a pocket for holding the roller, and connection parts and extending in a circumferential direction to connect the plurality of column parts, and continuously lined with each other in the circumferential direction between the outer ring and the inner ring. The column part is positioned at an circumferential end of the retainer segment. Here, a circumferential outer side end face of the column part positioned at the end is flat, and a circumferential inner side end face of the column part positioned at said end is provided with a recess recessed in the circumferential direction to reduce the thickness of the column part.

Abstract: In a split cage for a rolling bearing, cage segments each having a plurality of pockets that accommodate rolling elements are arranged in a circular manner along the circumferential direction. Protrusions are formed on end faces of rims of one of the adjacent cage segments, and grooves are formed in end faces of rims of the other one of the adjacent cage segments. By fitting the protrusions into the grooves, the adjacent cage segments are prevented from moving relative to each other in the radial direction.

Abstract: A cage used in a large-size rolling bearing is formed of a plurality of cage segments having a circular-arc shape and arranged in a circular pattern. Each cage segment includes rims opposed to each other and separated from each other at a predetermined interval, and a plurality of cage bars that extend from one of the rims to the other rim and that define pockets which accommodate the rollers and which are arranged in the circumferential direction. Multiple pairs of hook portions, between which the inner ring is sandwiched, are formed so as to project from the rims, and are arranged at predetermined intervals in the circumferential direction. Distal ends of the hook portions are engaged with annular grooves formed in end portions of the inner ring so as be rotatable relative to the inner ring.

Abstract: An object of the present invention is to prevent breakup of segments which constitute a split type retainer for a tapered roller bearing, when the tapered roller bearing is being mounted on target equipment, thereby improving operability in the mounting process. A segment for a tapered roller bearing is provided with a predetermined number of posts between a small-diameter-side end fringe which constitutes a small-diameter-side circumferential edge of a split type retainer and a large-diameter-side end fringe which constitutes a large-diameter-side circumferential edge thereof. Pockets are formed between the posts. At least the large-diameter-side end fringe, out of the small-diameter-side end fringe and the large-diameter-side end fringe, is provided with a large-diameter-side engagement piece.

Abstract: A cage for a rolling element bearing and a method for the production thereof. The cage has either an increased number of rolling elements or improved load-bearing capacity. A The cage has a plurality of cage pockets for receiving the rolling elements, two side rings and a plurality of cross-ribs. The cross-ribs connect the side rings such that the cage pockets are formed. The cage pockets have milled-out or drilled-out corner regions. hereinafter collectively referred to as milled-out corner regions, The corner regions, in a cutting plane perpendicular to the axis of rotation of the cage, have a radial milling course in the direction of the axis of rotations. The milling course, at least in a partial section, is configured at an incline with respect to a radial vector placed through the partial section and the axis of rotation, and is configured at an incline in the direction of the cage pocket.

Abstract: An object of the present invention is to prevent breakup of segments which constitute a split type retainer for a tapered roller bearing, when the tapered roller bearing is being mounted on target equipment, thereby improving operability in the mounting process. A segment for a tapered roller bearing is provided with a predetermined number of posts between a small-diameter-side end fringe which constitutes a small-diameter-side circumferential edge of a split type retainer and a large-diameter-side end fringe which constitutes a large-diameter-side circumferential edge thereof. Pockets are formed between the posts. At least the large-diameter-side end fringe, out of the small-diameter-side end fringe and the large-diameter-side end fringe, is provided with a large-diameter-side engagement piece.

Abstract: A manufacturing method of a roller bearing cage, including a cage main body formed with an annular plate, and a plurality of cage pockets opened along a circumferential direction on the cage main body for retaining rollers having flat end faces, includes punching an annular plate from a metal, forming a plurality of cage pockets on the annular plate, and pressing an edge of one of the cage pockets in a thickness direction of the annular plate on a side face of the one of the cage pockets with a press jig having a pressing face of a predetermined shape to form a chamfered portion.

Abstract: In a rolling bearing cage, adjacent cage bar portions on both sides of each pocket have protrusions protruding toward the pocket and a radially outer side and retaining a rolling element, accommodated in the pocket, from the radially outer side, a side surface of each cage bar portion and the corresponding protrusion, facing the pocket, has a guide surface slidably guiding the rolling element, the guide surface includes a first circular arc surface having a concave shape corresponding to an outer peripheral surface of each rolling element, and a side surface of each protrusion, facing the pocket, has a second circular arc surface having a convex shape smoothly continuous with a radially outer side of the first circular arc surface and an introducing surface smoothly continuous with a radially outer side of the second circular arc surface and inclined to a side opposite to the pocket toward a distal end of the protrusion.

Abstract: A roller cage for a rolling bearing, particularly a double roller cage for a cylinder rolling bearing, which has a ring web with axially extending webs. Every two adjacent webs delimit a receptacle pocket for a rolling element with a floor thereof being formed by the ring web. Each web has a radial outer and inner base side connected to each other by an axial outer face side. The face side of the radial outer base side is tapered toward the radial inner base side. To increase the rigidity of the webs with regard to trouble-free removal and installation of the rolling bearing, the radial inner base side is trapezoidal such that a web width of the radial inner base side increases from the face side to the floor of the receptacle pocket.

Abstract: A roller bearing assembly includes a plurality of rollers (122), a cage (114) including a plurality of slots (118) for positioning the plurality of rollers, an outer race (134) positioned radially outside the plurality of rollers and the cage, and means (126,130,138) for retaining axial alignment between the cage and the outer race provided integrally with at least one of the cage and the outer race.

Abstract: The bearing cage has a first flange, a second flange, and a plurality of cage bars extending between the first flange and the second flange so as to form and define outer boundaries for a plurality of pockets. The first flange and the second flange are each bent inward toward the pocket and then extend parallel in a vertical direction, forming a contact surfaces. The contact surfaces are in contact at each end of the rollers arranged in the pocket. The contact surfaces of the bearing cage present a large contact area between the ends of the rollers and the ends of the pockets where there is a lubricant film. Also, the surface of the contact surfaces is smooth.

Abstract: A cage is formed of a plurality of spacers that are arranged along a circumference of a same circle. Each spacer includes: first, second and third cage bars extending in substantially an axial direction of the circle and located at intervals from each other; a first coupling portion that couples an end portions of the first and second cage bars at one of the axial direction; and a second coupling portion that couples the other end portions of the second and third cage bars at the other one of the axial direction. The first cage bar, the second cage bar and the first coupling portion define a first pocket that is open at the other one of the axial direction side, and the second cage bar, the third cage bar and the second coupling portion define a second pocket that is open at the one of the axial direction side.

Abstract: A retainer-equipped roller includes a retainer (12) having a pair of ring parts (14) separated in an axis O direction and column parts (15) arranged circumferentially at regular intervals so as to form pockets (22) and connect the pair of ring parts (14), and a plurality of rollers (11) arranged in the pockets. The roller (11) has a chamfered part (13) provided between a roller end face and a roller rolling surface (11t). The column part (15) is positioned on a radial outer side of a pitch circle PCD of the roller (11), and a distance between the circumferentially adjacent column parts (15 and 15) is smaller than a diameter of the roller (11). The pair of ring parts (14) has a pair of projection members (16) projecting such that their tip ends are opposed so as to come close to each other, in circumferentially the same position as the column part (15), and in a position on a radially inner side of the pitch circle PCD of the roller (11).

Abstract: A rotation-support apparatus having construction in which large force is not applied to continuous sections between column sections 12a and rim sections 11 even when needles 6 push in the circumferential direction against the side surfaces in the circumferential direction of the column sections 12a, thus making it possible to improve the durability of a retainer 7a. Of both side surfaces in the circumferential direction of a straight section 15a on the inner-radial side in the middle section in the axial direction of the column sections 12a, the portion near the outer-radial side of the retainer 7a is more recessed than the portion near the inner-radial side of the retainer 7a. Moreover, this portion near the inner-radial side is located within the pitch circle P of the needles 6. Furthermore, there is no contact between the rolling surfaces of the needles 6 and the straight section 15a on the inner-radial side.

Abstract: A needle roller bearing, which has a rimless inner ring or a rimless inner ring bushing and a plurality of rolling elements that are arranged and rotatable in the cage. For coherence of the needle roller bearing after manufacturing and for mounting in an installation space, the cage has, at least on one front end, a radially inward pointing retaining device and the inner ring or the inner ring bushing has a retaining element on its outer periphery that cooperates with the retaining device.

Abstract: A rolling bearing (11) comprises a plurality of rollers, and retainer segments (15a) retaining the rollers and split along a split line extending in an axial direction. The retainer segment (15a) has a plurality of pillar parts (22a), (22b), (22c) and (22d) extending in the axial direction so as to form first pockets (23a) and (23c) and a second pocket (23b) for housing the rollers, and a connection part extending in a circumferential direction so as to connect the plurality of pillar parts (22a) to (22d).

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 and 3, and a cage 5 for holding the tapered rollers 4 in predetermined circumferentially spaced relation, wherein the roller coefficient exceeds 0.94, and with the cage 4 positioned at the axial center, there is a clearance between the cage and the raceway surface of the outer ring, and the roller abutting width of the pocket pole surface is secured across 10% or more of the pocket length axially from the central position of the pocket.

Abstract: A retained roller assembly, capable of facilitating the lubricating functionality, includes a cylindrical roller retainer having a plurality of pockets defined therein and arranged in a circumferential direction thereof, rollers accommodated within those pockets, respectively, and a roller retaining projection formed in opening edges of side faces, opposite to each other in the circumferential direction and situated on an inner diametric side and an outer diametric side, respectively. A roller guide face for guiding the corresponding roller is provided at an axial position on the side faces of each of the pockets that are different from the associated roller retaining projection. An annular recessed portion is provided in axially opposed ends of an inner diametric surface of the retainer so as to deploy over the entire periphery of the retainer.

Abstract: A cage for a radial roller bearing of limited width availability, which has a first flange, a second flange spaced from the first flange, and cage bars that extend between the first flange and the second flange so as to form a plurality of roller pockets. The cage bars, together with the first flange and the second flange form an S-shaped or a Z-shaped contour. The cage aids in properly guiding roller elements in bearings of limited widths. The cage prevents rolling elements from overrunning or under running the cage bar. The cage also provides for proper contact of the rolling elements to push the cage around the radial bearing. Further, the cage allows for inner retention, outer retention, or both inner and outer retention of the rolling elements.

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: In the present cage, both pillar portions which face each other in a circumferential direction of a pocket have a plurality of bent portions which are alternately bent in a width direction, and each bent portion is provided with roller stopping portions protruding into the pocket. The bent portions are formed in a curved cross-sectional shape. Tip portions of the bent portions in the thickness direction of the cage are formed in a cross-sectional shape that becomes narrower toward the tips, and the tip portions are drawn in a state where they protrude into the pocket by plastic deformation working, thereby forming the roller stopping portions.

Abstract: A roller bearing cage includes annular portions provided respectively at opposite ends thereof, a plurality of pillar portions interconnecting the annular portions, a plurality of pockets for respectively holding needle rollers, and roller retaining portions formed respectively on circumferentially-opposed wall surfaces and of each pocket portion. A concave groove smaller in width than the pillar portion is formed axially in a back surface of each pillar portion and those portion of back surfaces of the annular portions disposed respectively at opposite ends of each pillar portion. Separation groove portions are formed respectively at opposite sides of those portions of the concave groove disposed respectively at the opposite ends of the pillar portion, and extend respectively to corresponding circumferentially-opposite side surfaces of the pillar portion, and each separation groove portion separates the corresponding roller retaining portion and annular portion from each other.

Abstract: A tapered roller bearing has an increased load capacity and has a decreased maximum face pressure on the raceway surfaces without lowering the rigidity of the cage. The tapered roller bearing includes an inner ring, an outer ring, multiple tapered rollers rollably disposed between the inner ring 2 and the outer ring 3, and a cage for holding the tapered rollers at predetermined circumferential intervals, wherein the roller coefficient ? thereof is larger than 0.94. Herein, ?=(the number of the rollers×the average diameter of the rollers)/(?×PCD).

Abstract: A shaft is supported in a housing on the front and rear antifriction bearings that are mounted in opposition. The front bearing has an outer race provided with an external thread that engages an internal thread within the housing. That outer race is fitted with a locking ring provided with an inner flange that is engaged to turn the race and thereby bring the front and rear bearings into the correct adjustment. The locking ring also has an axially directed outer flange that is segmented, so that one of the segments can be bent outwardly into a recess in the housing, thus providing a tab that prevents rotation of the locking ring and outer race.

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 cage for antifriction bearings with rollers, which has a first lateral edge, a second lateral edge, webs, and pockets, which are adjacent to one another along the periphery and which serve to accommodate rollers. The webs and the lateral edges are formed together as a single piece, and the flanks have a finished profile-milled contour. The finished contour is a negative reproduction of a positive outer cutting contour of one profiling cutter.

Abstract: A rolling bearing retainer (1) for a cylindrical roller bearing is characterized by the fact that a web center part (4.2) is provided with a respective projection (4.3) on a circumferential side, and these projections (4.3), by twisting this web center part (4.2) about its longitudinal axis (4.5), are formed into holding lugs which in each case separate two adjacent cylindrical rollers (6) from one another and prevent the latter from falling out in a radial direction.

Abstract: A roller bearing cage is disclosed, which is provided inexpensively from basic minimum quantity of row material. The roller bearing cage is made with a production method using rolling operations, which is the absence of the formation of chips, while ensuring the strength and stiffness of the cage. A circular inside surface of the cage is made to give an advantage to the rolling operations. The circular inside surface is circularly recessed to have a concaved surface of just one radius of curvature R. A diametral dimension across diametrically opposing bottoms of the circular recess is made larger than the pitch circle distance P.C.D. Pillars of the cage have inside retainer lips, which are hard to make any engagement with their associated rollers, which might worsen the engine performance.

Abstract: A double-split cage includes a strip-shaped metallic sheet curved into a semi-cylindrical shape and having several pockets for accommodating a single row of rollers arranged in the circumferential direction. The strip-shaped metallic sheet has two arch portions separately arranged in the axial direction and includes pillar portions arranged at several positions of both arch portions in the circumferential direction. Both arch portions have protrusions protruding from the pillar portions at both end portions in the circumferential direction, and a forward end portion of each protrusion is chamfered at a corner outside in the axial direction. Length of the chamfered portion in the circumferential direction is larger than the protruding length of each protrusion.

Abstract: A cage for cylindrical rolling-contact elements, in which two rolling-contact elements that are in contact with one another at their lateral surfaces are arranged in series in the circumferential direction in a pocket and in which each of the two rolling-contact elements is guided parallel to a cage axis, includes a web connecting adjoining side rings to one another, there being stub-shaped webs on the side rings in the center of the pockets, between the two rolling-contact elements, the webs projecting partially into the pocket between the rolling-contact elements. The webs comprise sections that extend parallel to the cage axis, lie partially inside and partially outside the pitch circle and are connected to one another by sections that extend obliquely to the cage axis. The stub-shaped webs have no contact with the rolling-contact elements during rotation of the cage.

Abstract: An integral type thrust bearing is proposed which can be manufactured with fewer heat treatment steps. The retainer and the inner and outer rollers not hardened are assembled together with rollers into a bearing and thereafter the assembled bearing is carburized, hardened and tempered. This eliminates the need for individual heat treatment of the retainer and the inner and outer rings and decreases heat treatment steps for the production of thrust bearings.

Abstract: A bearing assembly comprising a cage, a plurality of rollers and a sleeve. The cage comprises a central portion extending between a pair of radial flanges. The central portion includes a plurality of roller retaining pockets configured to receive and prevent substantial radial movement of rollers positioned therein in a radial direction. The sleeve is positioned between the radial flanges with the radial flanges radially overlapping the sleeve. The sleeve is retained between the flanges prevents substantial radial movement of the rollers in the opposite direction.

Abstract: In machining a pocket (1) installing therein a rolling element, tools (7, 8) are prepared whose milling parts (5, 8a) have contours which coincide with the sectional configuration of the pocket resulting when the pocket has been machined along a retainer radial direction (Z), and the milling parts (5, 8a) of the tools (7, 8) are inserted into a prepared hole for the pocket which is provided in advance and are then translated in a retainer revolving direction (Y) and axial direction (X), respectively, for forming the pocket. Accordingly, it is possible to provide a retainer for rolling bearings that has high accuracy in machining pockets and which is suitable for an integral one-piece retainer.

Abstract: The caged roller assembly includes a roller cage and a plurality of rollers. The roller cage has annular end walls axially spaced from and axially opposed to each other, and a plurality of elongated pillars spaced from each other in a direction circumferentially of the roller cage and extending perpendicularly between respective outer peripheral edges of the annular end walls. The rollers are rollingly accommodated within respective pockets, each defined between the neighboring pillars. An annular inner portion of one or both of the annular end walls, which is situated between the neighboring rollers, is formed with a roller restraint pawl in the form of a bent piece, which operates to prevent the respective roller from being separated radially inwardly away from the roller cage.

Abstract: A double-split cage includes a strip-shaped metallic sheet curved into a semi-cylindrical shape and having several pockets for accommodating a single row of rollers arranged in the circumferential direction. The strip-shaped metallic sheet has two arch portions separately arranged in the axial direction and includes pillar portions arranged at several positions of both arch portions in the circumferential direction. Both arch portions have protrusions protruding from the pillar portions at both end portions in the circumferential direction, and a forward end portion of each protrusion is chamfered at a corner outside in the axial direction. Length of the chamfered portion in the circumferential direction is larger than the protruding length of each protrusion.

Abstract: A roller bearing cage having load capacity large enough to bear severe conditions imposed by high-speed engines, with even lighter in weight. In the roller bearing cage, the cage bars are each made up of axially opposite thick ends and a slim mid-area lying midway the thick ends to define a recess between them. The cage bar has radially outside projections on an outside periphery thereof while radially inside projections on an inside periphery thereof to keep the rollers against escape out of the cage. The radially inside projections extend circumferentially of the cage, especially, at a circular edge of the thick end, which lies nearby or neighboring or closer to the recess. The radially inside projections are made by forcing material at the edge to move circumferentially by plastic flow into the projections that extend circumferentially towards pockets on a radially inside circular surface of the thick end.

Abstract: A roller bearing cage is disclosed in which a pair of semicircular cage halves is assembled with their mating ends thereof coming into abutment against each other. The mating ends are chamfered off to stave off bearing failure resulting from any deformation that might occur at the areas nearby the mating ends owing to large centrifugal force imposed by high-speed engines. The roller bearing cage may be completed by only joining together the semicircular cage halves with their diametral mating ends coming into engagement with one another. Each of the semicircular cage halves is composed of axially opposing semicircular rims and cage bars interposed between the rims, thus helping ensure stiffness with even weighing less. The chamfering operation is done to make even any outer peripheral areas nearby the mating ends, preparatory to cutoff operation to split a cylindrical cage stock into two halves. This helps the process management of material-removal work to make the chamfered even areas.

Abstract: In a cage for cylindrical rolling bearings (5), which cage is rolled out of a sheet metal strip (12), the pockets (4), as seen in a top view, have, in a profiled, punched and unbent state of the sheet metal strip (12), a curved shape in a region of the inclined sections (8, 9), so that an axially inner, first convex curve B1 merges into an outer, second concave curve B2. This pocket contour of the invention makes it possible to obtain a separation between the retention of the rolling elements and the contact region of the rolling elements in the cage solely by the punching of the pockets in combination with a subsequent bending of the cage strip into a finished cage.

Abstract: A retainer for a roller bearing includes a pair of annular portions and a plurality of columns 23 provided between the annular portions. A plurality of pockets are defined by the annular portion and the column each for receiving a roller.

Abstract: A roller bearing cage having load capacity large enough to bear severe conditions imposed by high-speed engines, with even lighter in weight. In the roller bearing cage, the cage bars are each made up of axially opposite thick ends and a slim mid-area lying midway the thick ends to define a recess between them. The cage bar has radially outside projections on an outside periphery thereof while radially inside projections on an inside periphery thereof to keep the rollers against escape out of the cage. The radially inside projections extend circumferentially of the cage, especially, at just a circular edge of the thick end, which lies nearby or neighboring or closer to the recess. The radially inside projections are made by forcing material at the edge to move circumferentially by plastic flow into the projections that extend circumferentially towards pockets on a radially inside circular surface of the thick end.

Abstract: In a cage for cylindrical rolling bearings (5), which cage is rolled out of a sheet metal strip (12), the pockets (4), as seen in a top view, have, in a profiled, punched and unbent state of the sheet metal strip (12), a curved shape in a region of the inclined sections (8, 9), so that an axially inner, first convex curve B1 merges into an outer, second concave curve B2. This pocket contour of the invention makes it possible to obtain a separation between the retention of the rolling elements and the contact region of the rolling elements in the cage solely by the punching of the pockets in combination with a subsequent bending of the cage strip into a finished cage.