Abstract: A rolling bearing cage comprising a first side ring (1) and a second side ring (2) that are connected to each other by crossbars (3) so that pockets (5) for receiving rolling elements (4) are formed, and lubrication grooves (6) extend in axial direction up to said first and second side rings (1, 2) on at least one of peripheral surfaces and bore sections of the crossbars (3) wherein flow channels (7) are arranged in a fractional region of the lubrication grooves (6) and are set back relative to the lubrication grooves (6) in at least one of a radially inward and a radially outward direction. In this way, lubrication of such a bearing is substantially improved.

Abstract: A rolling bearing includes an inner ring having an outer surface, an outer ring having an inner surface, a plurality of rolling elements rotatably disposed between the inner ring and the outer ring, and a retainer for retaining the rolling elements. The retainer is made of a resin material and is positioned with respect to the inner surface of the outer ring or the outer surface of the inner ring. The retainer includes a pair of annular portions axially arranged in parallel and a columnar portion coupling the annular portions. Then, the rolling bearing satisfies the following expression: AI=LH3/dm ≧0.025 in which H is a radial length of a section of the annular portion, L is an axial length of the same, and dm is PCD of the rolling element.

Abstract: The invention relates to a window cage (1) for a needle bearing. The pockets (5) of said window cage are formed by punched out sections and by a stamping process with material displacement in a cage strip (9) which is then bent round. According to the invention, the window cage (1) is characterized in that before the cage strip (9) is bent, the opposite surfaces of the web walls of a pocket (5) are made up of three sub-surfaces (10, 11, 12) in the area of the retaining projections (7, 8). The first two sub-surfaces (10) follow a course which is parallel to a middle vertical (13) and each extend into a second sub-surface (11) at their upper end, said second sub-surface running diagonally in the direction of the central point of the pocket. Each of the second sub-surfaces then ends in a third sub-surface (12) which also runs parallel to the middle vertical (13).

Abstract: A synthetic resin cage for use in a bearing is provide to have a circular ring section and a column section with a plurality of columns, wherein only the base ends of the columns (4) are continued to the circular rig section (5) with the tip ends of the columns (4) being free, and some of the columns (4) have their tip ends connected to each other within a circumferential connecting frame portion (8), and e.g. part of the connecting frame portion (8) aces the end face of the rollers (6) to prevent the cage (1a) from dropping out of the bearing.

Abstract: A rolling bearing cage comprising a first side ring (1) and a second side ring (2) that are connected to each other by crossbars (3) so that pockets (5) for receiving rolling elements (4) are formed, and lubrication grooves (6) extend in axial direction up to said first and second side rings (1, 2) on at least one of peripheral surfaces and bore sections of the crossbars (3) wherein flow channels (7) are arranged in a fractional region of the lubrication grooves (6) and are set back relative to the lubrication grooves (6) in at least one of a radially inward and a radially outward direction. In this way, lubrication of such a bearing is substantially improved.

Abstract: A profiled cage characterized in that, between crossbars (5) in peripheral direction, side rings (1, 2) comprise a slot (15) which is spaced from the ends of the pockets (6) so that a section of material (16) is formed which is retained by two adjacent crossbars (5) and which, in a radially inwards bent state, constitutes the convexity (13, 14) providing an improved contact between the end faces of the rolling elements (7) and the convexities (13, 14).

Abstract: A solid cage for roller bearings, where the pitch circle of the rollers is between the radial center of the cage and its bore, with guide surfaces on the webs which conform to the lateral surface of the rollers, thus forming retaining edges in the area of the bore, across which the rollers are snapped into the pockets, characterized in that the guide surface 4 is interrupted by at least one strip 10, which curves to form an arc facing the roller 3, this strip being recessed into the guide surface 4 in the radially outward area of the cage, but projecting beyond the guide surface 4 in the radially inward area to serve as an additional retaining projection 12 for the roller3.

Abstract: A roller cage made of metal for holding rollers of a roller bearing, includes: separation bars separately defining a plurality of window holes along a peripheral direction of the bearing with a constant interval thereamong. The window holes respectively receive said rollers therein. Each of the separation bars includes: a contact surface being formed by press-molding one of an outer diameter surface side end portion and an inner diameter surface side end portion thereof, and contacting with the rolling surface of the roller; and an expansion portion expanding to a radial direction of the bearing at the other of the outer diameter surface side end portion and the inner diameter surface side end portion which is not subjected to the press-molding.

Abstract: A rolling bearing, having, for example, cylindrical rollers, is provided, between an inner ring and an outer ring, with a retaining structure for retaining the rollers. The retaining structure includes an annular retainer having a number of seats for click-in insertion of the rollers, and from an end edge of which projects a radially outer flange having a sliding surface cooperating in sliding manner with a radially inner surface of the outer ring of the bearing to support the annular retainer in a radially inner position with respect to the outer ring and so prevent the annular retainer from sliding against the rollers. The seats for the rollers each have a pair of axial projections for compensating any axial clearance between the rollers and the respective seats.

Abstract: A roller bearing has a slatted cage assembly that includes a lateral ring with axial webs to retain bearing rollers on the inside or on the outside diameter of the cage assembly. The slatted cage assembly is closed off by a cage cover mounted on the free axial ends of the webs. The slatted cage assembly prevents loss of rollers before and during assembly of when used with a full-complement roller bearing.

Abstract: In a synthetic roller-bearing cage, axially separated annular bodies are connected by columnar portions arranged in the circumferential direction in order to define roller accommodating pockets. A radially outer surface of the columnar portion forms a portion of a cylindrical surface whose radius is smaller than that of the outer circumferential surfaces of the annular bodies, thus forming a lubrication-oil flow surface. A radially inner surface of the columnar portion, together with inner circumferential surfaces of the annular bodies, forms a portion of a cylindrical surface whose diameter is at least 30% that of the roller greater than that of a shaft on which the roller bearing is mounted. Grooved portions are formed in the circumferentially opposite side surfaces of the columnar portion at axially opposite end regions adjacent to the respective annular bodies.

Abstract: The needle roller bearing B in this embodiment comprises a cage 1 having a plurality of elongated window-shaped pockets 1a formed therein at predetermined circumferential intervals, and a plurality of needle rollers 2 rollably received and held in the pockets 1a. The four corners A of each pocket 1a of the cage 1 are provided with relief portions 1an4 each having a circumferentially recessed arcuate peripheral wall surface. The circumferential dimension between the circumferential top 1a41 of the relief potion 1a4 and the pocket wall surface 1a1 is set with respect to the diameter Dw of the needle rollers 2 such that 0.01.ltoreq.h/Dw.ltoreq.0.2. The provision of the relief portions 1a4 at the corners A of each pocket 1a of the cage 1 permits the relief portions 1a4 to serve as passageways for the lubricating oil.

Abstract: The pockets (10) of a cage (5) of a radial rolling bearing comprise retention elements on the inner rolling element holding member or on the outer rolling element holding member which retain the rolling elements (6) in contact with an outer raceway or an inner raceway during the mounting operation. In this way, a sag of the cylinder rollers (6) due to the force of gravity is prevented so that a shaft (4) can be pushed into the bearing without any problem.These retention elements have such a filigree and elastically deformable configuration that they are ineffective during the operation of the bearing after a few rotations so that a normal operational clearance is established between the rolling elements (6) and the cage (5).

Abstract: A retainer and method of manufacturing the same which makes it possible to form roller stopper lugs reliably on broken surfaces on the side faces of the crossbars formed by punching and also guide surfaces which can guide rollers with high accuracy. A plurality of protrusions are formed on both sides of the crossbars. The surfaces of the protrusions are ironed in both thickness directions to form roller stopper lugs at both ends of the protrusions. The flat surfaces formed on the protrusions by ironing serve as the roller guide surfaces. Thus, the rising and sinking amount of the rollers can be controlled with high accuracy.

Abstract: The needle roller bearing A comprises a cage 3 having a plurality of long window-shaped pockets 3a formed at an appointed interval on its circumference, and a plurality of needle rollers 4 rollably accommodated and retained in the pockets 3a of the cage 3. The connection radius R (radius of curvature) between the inner diameter side portion of the pocket wall surface 3a1 and the inside surface 3b1 of the annular portion 3b, and the connection radius R (radius of curvature) between the inner diameter side portion of the pocket wall surface 3a2 and the inside surface 3b1 of the annular portion 3b of the cage 3 are set to a value having a relationship of 0.2<R/Dr.ltoreq.0.5, preferably 0.3.ltoreq.R/Dr.ltoreq.0.5 with respect to the diameter Dr of the needle roller 4.

Abstract: Two end rims are spaced along a common axis and are connected by crossbars such that elongated pockets are formed for rollers. Piloting pads extend axially along the crossbars and a portion of the end rims and extend circumferentially along a portion of the ends of the roller pockets. A radially outward surface of the end rims is recessed with respect to the piloting pads and provides a lubrication channel connecting the roller pockets.

Abstract: The present invention discloses a roller and cage assembly that inhibits generation of heat and in turn, prevents the occurrence of seizure, thereby attaining a long service life while also offering various other advantages.By cutting away the outside of a cage (1) in order to completely remove indentations (1j) formed during machining of outer retaining projections, the outer surface of those outer retaining projections (1h.sub.1) is made to coincide with the normal diameter (D.sub.0) of the cage (1). As a result of employing this constitution, even if the roller guide surfaces of the columns (1c) of the cage (1) become worn, the rollers (2) do not make contact with the outer retaining projections (1h.sub.1). In addition, since the above-mentioned indentations do not remain, the contact surface area with an attaching partner is increased, thereby reducing contact pressure, thereby allowing the object described above to be attained.

Abstract: A retainer for a needle bearing has an improved durability owing to the improved strength of its stay portions at the roots thereof, and an improved lubricating property. The retainer 10 is made by forming a plurality of longitudinally spaced apart pockets 11 for needle rollers in a strip of material, bending it into a cylindrical shape and joining its butt ends together. Every two adjoining pockets 11 define therebetween a stay portion 13 having a pair of axially extending sides S which are substantially parallel to each other. Every two adjoining stay portions 13 have between their radially inner ends a distance L1 which is smaller than the diameter of each needle roller 9f. Each stay portion 13 has a pair of protrusions 14 extending from its axially middle and radially outer part to the centers of two adjoining pockets 11, and the protrusions 14 in each pocket 11 have therebetween a distance L2 which is smaller than the diameter of the needle roller 9.

Abstract: In a raceway-guided or flange-guided cage made of plastic for roller bearings, webs (18) between side rings (14) and (16) are specially designed to prevent foreign particles present in the lubricant from damaging contact surfaces (S) of rollers (R). For this purpose, guide surfaces (26) are provided only at edges of rollers (R). Intermediate web side surfaces (30, 32) are set back from contact surface (S) by a wider gap (G). Retaining projections (40) are also separated by a gap (G.sub.1) from contact surface (S) in the axial center, the point of greatest flexiblity for the snapping-in of the rollers.

Abstract: A retainer for a needle roller bearing which can prevent a film of lubricating oil from being broken due to its needle roller retaining claws and thus prevent peeling of the needle rollers. Outer-diameter claws and inner-diameter claws are provided on roller guiding surfaces on both sides of each crossbar portion of the retainer to retain the needle rollers in pockets defined between the adjacent crossbars. In the case of an outer-diameter guide type retainer, the outer-diameter claws are provided at a stepped portion formed on the outer-diameter surface of each crossbar. In the case of an inner-diameter guide type retainer, the inner-diameter claws are provided at a stepped portion formed on the inner-diameter surface of each crossbar.

Abstract: An overrunning clutch comprising two concentric machine components (1,2) rotatable relative to each other and having locking surfaces (13,14) formed on their mutually facing peripheral surfaces, and, arranged therebetween, a plastic cage (4) comprising end rings (15) connected to each other by crossbars (16), pockets (17) for locking elements (3) spring-urged against the locking surfaces (13,14) being formed between circumferentially adjacent crossbars (16), the plastic cage (4) further comprising at least one radial projection (19) which engages into a recess (20) of one of the machine components (2) to prevent rotation of the plastic cage (4) relative to this machine component (2), characterized in that the radial projection (19) is arranged on a crossbar (16).

Abstract: Firstly, a roller and cage assembly is disclosed that achieves improved lubricating property while maintaining or increasing rigidity. While concave portions are formed so as to extend the width of the central portion of pockets to allow these to act as oil grooves, on the other hand, padding equivalent to lightening holes that are removed by providing said concave portions is performed in columns to obtain high rigidity.Secondly, a roller and cage assembly is disclosed that together with being inexpensive and having high wear resistance, suppresses the generation of heat resulting from high-speed rotation. The above-mentioned effects are obtained by forming a composite plated film at prescribed sites by uniform dispersed coprecipitation of fine particles of fluororesin.Thirdly, a roller and cage assembly is disclosed that together with suppressing the generation of heat resulting from high-speed rotation, also achieves light weight. The above-mentioned effects are obtained by using ceramic rollers.

Abstract: A flat strip of metal is formed to provide a depressed center relief portion between two edge portions. Depressions are formed in the two edge portions and center slots are pierced across the center relief portion such that roller receiving slots are formed with slot end depressions at both ends of the roller receiving slots. The partially formed bearing cage is then formed into a circular hoop such that the edge portions form rings at the axial ends of the circular hoop. The resulting roller bearing cage of the present invention may also be formed by other methods.

Abstract: A bearing cage for a roller bearing. The bearing cage comprising first and second annular end rims axially spaced along a common axis and cross bars connecting the end rims such that pockets are formed between the end rims and the cross bars for retaining the rollers. Axially outward surfaces of the end rims define the axial length of the bearing cage and include at least one recess for facilitating passage of lubricant to the rollers.

Abstract: A double-row spherical roller bearing comprises an inner race, an outer race, two retainers each molded of a synthetic resin, and double-rows of spherical rollers rotatably received in pockets of the retainers and arranged one after another in the equally spaced relationship in the circumferential direction. Each retainer is molded such that an annular portion on the large diameter side and an annular portion on the small diameter side are integrally jointed to each other with a plurality of retainer bars bridges therebetween. Each retainer bar comprises an inner portion located on the inner race side and an outer portion on the outer race side. Each side surface of the inner portion is defined by a part of the spherical surface extending around the spherical surface of each spherical roller. In addition, each side surface of the outer portion is defined by a first surface, a second surface and a third surface.

Abstract: A strip of metal is pierced intermediate the edges thereof to form slots for rollers and is bent adjacent the edges to form flanges. Each bend intersects the slots such that the slots wrap around the bends into the flanges. The strip of metal is then formed into a circular hoop such that the flanges form axially spaced end rims to retain the rollers axially. Crossbars between the slots are offset radially in a sigma configuration to retain the rollers radially. Edges of the slots may be specially formed to facilitate flow of lubricant through a roller bearing.

Abstract: A cage and roller type roller bearing is provided. The bearing generally include a cylindrical cage and a plurality of rollers which are maintained in position by the cage. The cage includes a pair of circumferential sections and a plurality of axial sections extending between the pair of circumferential sections and spaced apart at a predetermined pitch in the circumferential direction to thereby define a plurality of windows each receiving therein a corresponding roller rotatably and generally rectangular in shape and somewhat larger in size than the roller. Each of the axial sections has its central inner portion of its inner surface removed to define an inner recess so that the axial section is divided into a relatively thin central portion and a pair of relatively thick end portions.

Abstract: A cage has a pair of annular bodies and a plurality of columns provided at equal spacings to couple the annular bodies together to receive spherical rollers therebetween. The columns have side faces each having both axial end portions thereof formed by a composite surface having a flat surface provided outside the pitch circle of the spherical rollers and a conical surface provided inside the pitch circle. Each flat surface is inclined with respect to a plane including the axis of each spherical roller and the axis of the cage so as to come into point-to-point contact with the outer periphery of the respective spherical roller while the bearing is rotating. Each flat surface intersects each plane including the abovementioned axes along a line intersecting the axis of each spherical roller at a right angle.

Abstract: An angular ball bearing having an outer ring, a cage mounted in the outer ring and formed at equal circumferential intervals with pockets and balls received in the pockets, and an inner ring mounted in the cage. The cage is formed on the surface of the pockets with projections to prevent the balls from coming out of the pockets. When the balls are in abutment with the projections, the diameter of the circumscribed circle of the balls is equal to or smaller than the internal diameter of the outer ring.To assemble the angular ball bearing, the balls are set in the pockets in the cage, a resilient member having substantially the same external diameter as that of the inner ring and the resilient member is pushed out with the inner ring in an axial direction to fit the inner ring inside the balls.

Abstract: A roller seating for swivel motions includes an outer ring, an inner ring and roller rolling in between which are inserted individually between spacers of a flectionally elastic cage. On at least one end of the spacers, one or more projections directed radially outward and/or radially inward have been formed which face, radially and/or axially, a revolving shoulder surface of the outer ring or the inner ring. In order to keep the play of the rollers between the spacers on the circumferential side as small as desired, each projection of the cage is arranged in such manner that it pushes against the circumference of the corresponding shoulder surface of the outer ring or the inner ring and brings the holding surfaces of the spacers against the rollers due to the elastic deformation of the cage.

Abstract: A cage of a roller bearing including a plurality of pockets formed by punching from the outside, each storing a roller, in the circumferential direction of a barrel, which comprises a first projection for preventing the roller from being disassembled to the outside of the barrel and a second projection for preventing the roller from being disassembled to the inside of the barrel. The first projection is provided at a thin portion of the barrel which is formed between the brims of the pocket. The second projection is provided at a thick portion of the barrel in the axial direction by knurling.

Abstract: A roller bearing cage for cylindrical rollers comprising two parallel end rings (1) connected by a plurality of crossbars (2) distributed over the circumference of the cage to form pockets (3) for accommodating two adjacent rollers (4) in each pocket, the crossbars (2) being provided with holding projections (5) in the area of their inner and outer border edges projecting into the pockets (3), the cage being made of a flat sheet metal strip rolled into a round shape and welded at the abutment point (6) where the ends of the strip meet in the area of a pocket (7) being dimensioned to accommodate a single roller (4).

Abstract: The cage portion of a cage and roller assembly has two annular end rims joined by cross-bars around the periphery of each rim. The rims and cross-bars define multiple pockets which hold the rollers. The cross-bars are configured to contain the rollers within these pockets; in addition, coined ramp surfaces and land surfaces on the cross-bar outer surfaces extend radially outward farther than the outer surfaces of the end rims and are configured to provide improved lubrication between the outer surface of the cage and an outer raceway.

Abstract: A roller-cage assembly for use in a bearing includes a cylindrical cage provided with a plurality of openings extending axially and spaced apart from one another circumferentially and a plurality of rollers, each of which is received in a corresponding one of the openings. Each opening is defined by a pair of oppositely disposed side guide surfaces and a pair of oppositely disposed end guide surfaces, whereby the distance between the pair of oppositely disposed side guide surfaces is larger than the diameter of the roller and the distance between the pair of opposite end guide surfaces is larger than the length of the roller, so that the roller may rotate freely within the opening.

Abstract: A taper roller bearing is described which has the particular feature of having the track of the inner ring capable of being inspected, such characteristic is obtained by means of a spacer cage the bridges of which extend both above and below the roller pitch circle identified by the axes of the rollers in such a way as to retain these latter in the pockets of the cage both on the outer ring side and on the inner ring side of the bearing; the cage in the pockets of which the rollers are snap-engageable, is removable together with the rollers of the track of the inner ring, being axially fixed to this latter by snap-engagement.

Abstract: A cage for a tapered roller bearing includes a small diameter ring, a large diameter ring and circumferentially spaced arms joining the rings and defining pockets for the tapered rollers. The inwardly facing opposite surfaces of the arms in a pocket including an axial region adjoining the large diameter ring, which is also radially outside of the mold parting line developed during the formation of the cage. Those surfaces of the arms in the region adjoining the large side ring of the cage are shaped to the roller within the packet. In each cylindrical sectional plane through the bearing, which also passes through each of the rollers and is parallel to the axis of the bearing, the distance apart of the surfaces of the arms is approximately the length of a chord of the largest diameter of the roller in that cylindrical sectional plane.

Abstract: A roller retaining assembly for use in a roller bearing includes a retaining ring provided with a plurality of retainer windows arranged spaced apart one from another along the circumferential direction of the ring and a plurality of rollers each of which is received in an associated one of the plurality of retainer windows. The retainer window is generally rectangular in shape and it has a length and a width which are slightly larger than the length and the diameter of the roller, respectively. The retainer window is provided with a pair of retaining projections at the outer peripheral surface and also at the inner peripheral surface of the retainer ring located at the center in the axial direction of the retainer ring. The shortest distance between the pair of retaining projections is set to be smaller than the diameter of the roller so that the roller is confined in the retainer window at all times.

Abstract: A pocket cage for a rolling bearing, e.g. a cylindrical roller bearing, made in a mold with single-piece, radially movable sliders, in particular out of plastic material with low deformability, which cage comprises two side rings connected by webs, with at least the circumferential outer surface or the bore being provided with projections which project into the pockets and extend along only part of the web length for retaining the rolling elements in the radial direction. In particular, a retaining projection is provided on a first side of each web and a recess, i.e. free space, is provided on a second side of each web. The angle between the oblique surface of the recess and the second side surface of the web is greater than or equal to the angle between the surface of the retaining projection which faces the rolling element and the first side surface of the web.

Abstract: A solid window cage for a cylindrical roller bearing is provided. The pockets for the cylindrical rollers are defined between two axially spaced end rings and by circumferentially spaced apart webs which join the end rings. On each web facing into each pocket, a respective roller holding ledge is developed. The ledge extends in the circumferential direction of the cage into the respective pocket for preventing the roller from falling radially from the pocket. The ledge has an axially central section which projects in the circumferential direction of the cage further into the pocket, and the sides of the ledge adjacent the central section gradually decrease in height in the circumferential direction of the cage toward the end rings, giving the ledge an either dome or trapezoidal shape. The cage has undercuts extending radially through the cage at the transitions between the end rings and the webs.