Abstract: In a rolling bearing including a cage arranged in an annular space between an outer ring and an inner ring, a plurality of rolling elements held by the cage, and a solid lubricating agent provided in the cage, the cage has a plurality of rolling element receiving pockets in a circumferential direction, and has recess portions between the rolling element receiving pockets in a circumferential direction, and each of the rolling elements is received in each of the rolling element receiving pockets. The solid lubricating agent is attached to the recess portions in such a manner as to be in a slidable contact with a rolling element raceway surface.

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

Abstract: A rolling element bearing anti-cavitation cage is a circular ring with a plurality of cage pockets at predetermined intervals along a circumference of the circular ring. Each of the cage pockets has at least one groove on the leading edge of the cage pocket and at least groove on the trailing edge of the cage pocket. An assembled rolling element bearing is also provided in which the rolling element bearing anti-cavitation cage has rolling elements within the cage pockets and in concentrically disposed between inner and outer races. A method for preventing cavitation during the operation of an assembled rolling element bearing using the cage is also provided.

Abstract: A cage with storage space for a lubricant, particularly for roller bearings operating in a depressurized environment, including at least one storage space containing a lubricant between two chambers of rotating elements. The storage space includes at least one roughly radial or tangential outlet for the lubricant. The storage space advantageously includes an opening that opens towards an axis of the cage.

Abstract: A toroidal-type continuously variable transmission, has: first and second disks; a plurality of trunnions; a plurality of displacement shafts respectively supported on associated trunnions; a plurality of power rollers respectively interposed between the first and second disks; and, a plurality of thrust bearings respectively interposed between the power rollers and trunnions, each of the thrust bearings including an outer ring, an inner raceway formed in the outer end face of the power roller, a plurality of rolling elements, and a circular-ring-shaped retainer, wherein, in case where the density of a retainer material constituting the retainer is ?d, the elastic modulus of the retainer material is Ed, the density of rolling element materials is ?c and the elastic modulus of the rolling element materials is Ec, { ( ? d · E d ) / ( ? c · E c ) } 1 2 ? 0.6 is satisfied.

Abstract: A cage of a cylindrical roller bearing includes an annular section, a plurality of pillars that extend axially in an integrated, continuous manner from the inside surface of the annular section, and a plurality of pockets, which are formed between the inner circumferential direction side faces of adjacent pillars, and hold the cylindrical rollers in a freely rotatable manner. The circumferential direction side faces of the pillars incorporate a circular arc surface formed in both the inside and outside diameter directions from the pocket PCD which passes through the pocket center of the pocket, and a roll-off section (lubricant reservoir) provided at the tip end inner circumferential section.

Abstract: An angular ball bearing is provided which can suppress runout of a retainer during high-speed rotation. A retainer of a synthetic resin is mounted between an outer ring and an inner ring, and balls are housed in pockets formed in the retainer. The pockets are cylindrical. Conical guide surfaces are formed on the cylindrical inner surface of each pocket at its inner-diameter end in the circumferential direction of the retainer. The radius of curvature of the conical guide surfaces at the large diameter ends thereof is greater than the radius of curvature of the cylindrical inner surfaces, thereby preventing the contact points between the balls and the conical guide surfaces from becoming markedly displaced in the diametric direction during high-speed rotation, and thus suppressing runout of the retainer.

Abstract: A rolling bearing lubricated with a grease includes an outer ring, an inner ring, a plurality of rolling elements disposed between respective rolling raceway tracks of the outer ring and the inner ring, and a retainer having a plurality of pockets for locking the rolling elements to freely roll and formed of resin material. In the rolling bearing, the radial clearance gap ratio of the pockets of the retainer is set to 0??r/Da?0.09, and the axial clearance gap ratio of the pockets is set to 0??a/Da?0.06 when the kinematic viscosity of base oil at 40° C. of the grease is 10 to 40 mm2/sec, being set to 0??a/Da?0.05 when the kinematic viscosity of base oil is 10 to 90 mm2/sec, being set to 0??a/Da?0.025 when the kinematic viscosity of base oil is 10 to 160 mm2/sec.

Abstract: A film composed of grease, or a film composed of a thickener for grease, is formed on a portion of the surface of each of components constituting a bearing, the portion being opposed to a polymeric lubricant, whereby sliding frictional resistance between the bearing components and the polymeric lubricant is reduced. In the formation of the film, the assembled bearing in which the film has not yet been formed is immersed into a liquid which is obtained by diluting the grease or the thickener for grease with a solvent, and the solvent is then dried, thereby to highly reproducibly form the film of uniform thickness. In an assembled double-row self-aligning roller bearing wherein an outer race is swingable in a direction perpendicular to the center axis of the bearing, raw materials of a polymeric lubricant are poured into and solidified in two regions of an annular space between the inner and outer races.

Abstract: The churning type of grease of a viscosity of 15–20 mm2/s and a worked penetration of 200˜230 is disposed at the rolling surface of the race portions and the channeling type of grease of 25˜35 mm2/s and a worked penetration of 240˜270 is disposed at the retainer. By constituting as such, at rotation of the ball bearing, maintaining the lubricant oil film in the bearing the lubrication can be continued, and at non-rotation of the ball bearing the lubricant oil film is protected by the grease to prevent fretting.

Abstract: A deep channel type of radial ball bearing having a retainer. The bearing has an outer ring and an inner ring. Running channels are formed on the mutually opposing orbiting surfaces of the outer ring and inner ring. A specified number of balls are fit into the running channels. The retainer having pockets is placed between the outer ring and the inner ring. Each ball is captured in one of the pockets. A ball contact surface is formed on the inner surface of each edge on the opening side of the pockets. A curved ridge line forms the boundary between the inner surface of the pocket and the contact surface. This curved ridge line that forms the boundary is substantially parallel to the direction of rotation of the balls. A channel is formed at the bottom surface of the pocket. The channel extends from the inner perimeter to the outer perimeter of the retainer.

Abstract: A full complement angular ball bearing with no cage and having a contact angle from 10 to 45° and an increased number of balls for use under severe conditions. The life is extended by defining the surface roughness of the inner ring and the outer ring, defining the roughness ratio of them relative to the rolling element, defining the Cr content in the alloy steel for the rolling element, forming the rolling element with oxide ceramics, or providing a dense nitride layer on the surface of the rolling element, avoiding the presence of particles with a mean diameter in excess of 3 ?m on the raceway surfaces of the outer ring and the inner ring, or coating a film of a hardness higher than that of the raceway surface of the outer ring and the inner ring on the surface of the rolling element.

Abstract: In a rolling bearing including a cage arranged in an annular space between an outer ring and an inner ring, a plurality of rolling elements held by the cage, and a solid lubricating agent provided in the cage, the cage has a plurality of rolling element receiving pockets in a circumferential direction, and has recess portions between the rolling element receiving pockets in a circumferential direction, and each of the rolling elements is received in each of the rolling element receiving pockets. The solid lubricating agent is attached to the recess portions in such a manner as to be in a slidable contact with a rolling element raceway surface.

Abstract: A separator for a bearing comprising a frame including a plurality of cavities for receiving rolling elements and further including a lubrication channel in fluid communication with at least one of the plurality of cavities. This separator may be a component of a bearing including an inner race, an outer race, and a plurality of rolling elements disposed in each of the plurality of cavities of the separator and set to be in movable contact with the outer race and inner race of the bearing. A lubricant is introduced into the lubrication channel and flows into each of the plurality of cavities which provides evenly distributed lubrication to each rolling element of the bearing assembly.

Abstract: In the inner and outer surfaces of the retainer 34b, there are formed recessed grooves 40a, 40a which serve as lubricating oil flow passages for allowing lubricating oil to flow into pockets. Where the axial-direction depth of the recessed groove 40a, 40a is expressed as H and the circumferential-direction width thereof is expressed as 2L, 0.29≦H/L≦0.88 can be satisfied. Accordingly, it is possible to provide a toroidal-type continuously variable transmission which can prevent the damage of a retainer 34b incorporated into a thrust rolling bearing for supporting a power roller and also can enhance the lubricating efficiency of the present thrust rolling bearing.

Abstract: A window-type cage for an angular contact ball bearing. Lubricant pockets are provided in the spherical pocket surfaces which are provided for guiding the balls. These lubricant pockets are all arranged in regions which lie outside the bearing points between the ball and the cage in both the circumferential direction and the axial direction, such that the wall thickness of the cage at the bearing points is not reduced by the position and design of the lubricant pockets.

Abstract: A cage, rollers and solid lubricant are all formed integrally into a complete unitary molding with using difference in thermal expansion in a mold. Assembling the complete unitary molding into the race in the rolling-contact bearing is made easier. The complete unitary molding is made such that the rollers remain exposed partially at their rolling surfaces above the inside circular surface of the complete unitary molding while the solid lubricant on the outside circular surface of the complete unitary molding is squeezed out from between the rolling surfaces of the rollers and the inside circular surface of the outside mold upon molding operation, thereby getting the rolling surfaces of the rollers exposed partially. The mold is composed of an outside mold, an inside mold and an intermediate mold, which is made of a substance larger in thermal expansion than other substance for the outside and inside molds.

Abstract: A needle roller bearing includes a plurality of needle rollers that each have first and second end portions and that are disposed circumferentially around a shaft, a cylindrical first retainer member having a plurality of first notches each respectively adapted to rotatably support the first end portion of a respective one of the rollers, and a cylindrical second retainer member located spaced apart from and opposite the first retainer member and having a plurality of second notches each respectively adapted to rotatably support the second end portion of a respective one of the rollers. A plurality of voids are provided to form grease-containing spaces between the adjacent rollers and between the first and second retainer members so that the roller bearing is sufficiently lubricated.

Abstract: The invention relates to the provision of an improved bearing and to apparatus incorporating the same. The bearing is particularly for use in environments where the bearing is submerged in a fluid and is used in conjunction with a component which allows the flow of fluid therethrough. The bearing has an inner and outer race and a cage within which a series of ball bearings are provided. In accordance with the invention a channel is formed between the cage, inner and outer races through which fluid can pass. The provision of the flow, prevents clogging with debris and minimises damage due to corrosion or other chemical attack on the bearing.

Abstract: A separator for a bearing comprising a frame including a plurality of cavities for receiving rolling elements and further including a lubrication channel in fluid communication with at least one of the plurality of cavities. This separator may be a component of a bearing including an inner race, an outer race, and a plurality of rolling elements disposed in each of the plurality of cavities of the separator and set to be in movable contact with the outer race and inner race of the bearing. A lubricant is introduced into the lubrication channel and flows into each of the plurality of cavities which provides evenly distributed lubrication to each rolling element of the bearing assembly.

Abstract: A roller retainer assembly for an axial-thrust bearing comprising first and second annular retainer plates. At least one roller pocket extends through each annular plate. The first second annular retainer plates are interconnected such that the at least one first roller pocket is substantially circumferentially aligned with the at least one second roller pocket with the inner and outer radial edges of the opposed pockets offset from one another. As such, the first pocket defines a first fluid passage gap through the first annular plate between the roller and the first outer edge and the second pocket defines a second fluid passage gap through the second annular plate between the roller and the second inner edge.

Abstract: A damper for isolation of vibration includes: three ball bearings; a bearing support member having a sloping top side portion adapted to gently maintain the three ball bearings in spaced position when rollingly carried thereon; and, an equipment support member having a sloping bottom side portion seated on, and carried by a top side portion of the three ball bearings. When vibration moves the roller support member, the ball bearings roll and the equipment support member carried thereon remains relatively stable. The damper may be carried on a suspended carriage having: an upright tube having an open top portion and three spaced openings therearound; bolts positioned above the spaced openings; an inner suspended member having three outwardly projecting legs positioned to project through the openings in the upright tube; and, three bands each interconnecting the bolts and the projecting legs thereby suspending the carriage within the tube.

Abstract: A bearing assembly includes a first race with an axially extending section and a radially extending section, a second race with an axially extending section and a radially extending section, a cage supported between the first and second races, and a plurality of rolling elements circumferentially spaced within openings formed in the cage. A radial lubrication passage with an inlet and an outlet extends through at least a portion of the cage. The radially extending section of the first race and the axially extending section of the second race define a first annular gap. The radially extending section of the second race and the axially extending section of the first race define a second annular gap. Preferably, the inlet is in fluid communication with the first annular gap and the outlet extends axially through the cage and is aligned with the second annular gap.

Abstract: A bearing assembly includes a first race with an axially extending section and a radially extending section, a second race with an axially extending section and a radially extending section, a cage supported between the first and second races, and a plurality of rolling elements circumferentially spaced within openings formed in the cage. A radial lubrication passage with an inlet and an outlet extends through at least a portion of the cage. The radially extending section of the first race and the axially extending section of the second race define a first annular gap. The radially extending section of the second race and the axially extending section of the first race define a second annular gap. Preferably, the inlet is in fluid communication with the first annular gap and the outlet extends axially through the cage and is aligned with the second annular gap.

Abstract: A ball bearing is described, which comprises an outer ring having on its inner periphery an outer raceway, an inner ring having on its outer periphery an inner raceway, plural balls rotatably disposed between the outer raceway and the inner raceway, a cage holding the plural balls in a freely rotatable manner, and a grease packed in a space between the outer raceway and the inner raceway, wherein the inner peripheral surface of each pocket of the cage contains a spherical part consisting of a spherical concave surface whose radius of curvature is slightly larger than that of each ball and a curved part which has the radius of curvature being larger than that of the spherical part and is smoothly continuous from the end of the spherical part toward the end thereof on the opening side of the pocket.

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: In the circular ring forming the retainer, there is formed a groove for connecting together one end surface of the circular ring (grease placement surface for grease) and a pocket surface. The width of the groove is set such that, on the circumferential direction of the circular ring, it becomes continuously narrower from the far side of the pocket surface toward the near side thereof and, on the depth direction from the placement surface (in the axial direction of the circular ring), it becomes continuously narrower as the depth of the groove increases. In the pawl portion of a pocket, there is formed a cut portion which is continuous with the groove. Along the outer periphery of the circular ring, there is formed a wall portion which projects out from the end surface.

Abstract: A retainer for rolling bearings is made from a phenol resin in which graphite and cotton fabric chips are mixed, and an inner circumferential surface and side surfaces other than inner circumferential surfaces of the pockets of the retainer are made of a skin layer. Therefore, the strength can be ensured with this skin layer, while the skin layer is absent in the inner circumferential surfaces of the pockets serving as sliding surfaces, allowing the graphite and the cotton fabric chips to be exposed, so that the lubricating performance can be ensured. Thus, a retainer for rolling bearings, as well as a manufacturing method therefor, which allows lubricating performance and strength to be ensured at the same time can be provided.

Abstract: A spacer type solid lubricating bearing disposing a spacer comprising a solid lubricating material, for example, graphite between each of rolling elements is proposed. A solid lubricating rolling bearing is provided with an inner ring, an outer ring, rolling elements, spacers of a material containing a solid lubricant comprising a selected material, and a cage with a pocket for accommodating at least one spacer and one rolling element as a unit.

Abstract: A cage for a rolling element bearing comprises at least one ring shaped body (1, 2) carrying regularly spaced cage bars (5), each pair of adjacent cage bars (5) defining a cage pocket (4) for accommodating a rolling element. At least one of the cage bars (5) comprises means (6, 7) for improved retention of grease thereon. The cage bar (5) comprises at least one space (8, 9) for accommodation of grease (10). Furthermore, the cage bar (5) comprises elements (6, 7) situated radially outside and/or inside, said element(s) defining at least one space (8, 9) for accommodation of grease (10).

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 cage with storage space for a lubricant, particularly for roller bearings operating in a depressurized environment, including at least one storage space containing a lubricant between two chambers of rotating elements. The storage space includes at least one roughly radial or tangential outlet for the lubricant. The storage space advantageously includes an opening that opens towards an axis of the cage.

Abstract: In the retainer 10 for a rolling bearing having the retainer comprising a plurality of pockets 21 for supporting a plurality of rolling body in the circular direction at an equal spacing on one end side of the retainer, a plurality of recessed portions 23 and 24 bin communicated with both of the back face and the periphery surface are formed, and after assembling the retainer on both ends of the bearing, the lubricant is applied from the recessed portion 23 of the back face to the recessed portion 24 bof the periphery side and is made to flow in the bearing approximately uniformly in the circular direction to apply the sufficient amount of lubricant in the pocket 21 of the front of the retainer 20 and the connection portion 22 to solve the variation of the bearing torque and reduce.

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: A plastic snap cage for radial ball bearings includes thin-walled cup-like pocket elements spaced about the circumference and connected with each other in one piece through ribs, thereby forming pockets that are open in the axial direction to receive the balls. The radially inwardly and/or the radially outwardly extending boundary edge of the pockets is rounded in accordance with a selected rounding radius R.

Abstract: In the retainer 10 for a rolling bearing having the retainer comprising a plurality of pockets 21 for supporting a plurality of rolling body in the circular direction at an equal spacing on one end side of the retainer, a plurality of recessed portions 23 and 24 in communicated with both of the back face and the periphery surface are formed, and after assembling the retainer on both ends of the bearing, the lubricant is applied from the recessed portion 23 of the back face to the recessed portion 24 of the periphery side and is made to flow in the bearing approximately uniformly in the circular direction to apply the sufficient amount of lubricant in the pocket 21 of the front of the retainer 20 and the connection portion 22 to solve the variation of the bearing torque and reduce.

Abstract: The freedom of the resilient deformation of the claws 3 is controlled by changing the configuration (diameter and depth) of the cylindrical cut out portion 7 of the bearing retainer 6. And, the necessary force to push and widen the claws 3 is optimized, thereby, it is avoided to damage the ball 11 at the time of setting the ball in the pocket 2.

Abstract: Annular housing device intended for maintaining the circumferential spacing of the rolling elements, in particular balls, in a rolling bearing, having at least one row of balls arranged between two rolling tracks, the housing having a rear face and a front face which are axially offset and having a multiplicity of substantially spherical cells, in each of which a ball is arranged, the cells issuing axially on the front face and radially on the two sides, the front face having a multiplicity of pairs of opposite tabs for maintaining the balls in the cells. The front face comprises two surfaces axially offset relative to one another, of which an outer first surface has the tabs projecting from it and is located in a plane in front of the radial plane passing through the centers of the cells, and of which an inner second surface is located in a plane passing substantially through the centers of the cells.

Abstract: In the circular ring forming the retainer, there is formed a groove for connecting together one end surface of the circular ring (grease placement surface for grease) and a pocket surface. The width of the groove is set such that, on the circumferential direction of the circular ring, it becomes continuously narrower from the far side of the pocket surface toward the near side thereof and, on the depth direction from the placement surface (in the axial direction of the circular ring), it becomes continuously narrower as the depth of the groove increases. In the pawl portion of a pocket, there is formed a cut portion which is continuous with the groove. Along the outer periphery of the circular ring, there is formed a wall portion which projects out from the end surface.

Abstract: The present invention provides a synthetic resin crown-shaped retainer for ball bearing, which permits the reduction in the deformation of pawls and the prevention of scattering over of grease.

Abstract: A rolling bearing for an HDD being excellent in the resistance to fretting wear, capable of lowering the torque and relieving the torque change and having a long life while exerting no undesirable effect on various bearing properties. A rolling bearing for hard disk drives wherein a cage 7 supports a plural number of rolling elements 5 located between an inner ring 2 and an outer ring 4 and sealing members 6,6 fixed to the both ends in the axial direction of one of said inner ring 2 and said outer ring 4 are opposite to each other, wherein a lubricating oil has been injected into the bearing space formed between said sealing members 6,6 at the both ends in the axial direction so as to amount to 1 to 50% by volume of the bearing space.

Abstract: A retainer for rolling bearings is made from a phenol resin in which graphite and cotton fabric chips are mixed, and an inner circumferential surface and side surfaces other than inner circumferential surfaces of the pockets of the retainer are made of a skin layer. Therefore, the strength can be ensured with this skin layer, while the skin layer is absent in the inner crcumferential surfaces of the pockets serving as sliding surfaces, allowing the graphite and the cotton fabric chips to be exposed, so that the lubricating performance can be ensured. Thus, a retainer for rolling bearings, as well as a manufacturing method therefor, which allows lubricating performance and strength to be ensured at the same time can be provided.

Abstract: A rolling bearing for a rotary shaft of a disk memory device which can maintain high-accuracy optical or magnetic recording ability over a long period of time. The rolling bearing supports a rotary shaft of a disk of disk memory device or a rotary shaft of an arm of a head, and has an inner ring having an inner diameter of 8 mm or less, and a retainer formed by molding an oil-containing resin composition comprising 40-94 wt % of a synthetic resin, 1-40 wt % of oil conducting material, and 5-30 wt % lubricating oil. Lubricating oil is dispersed uniformly in the composition, and can bleed onto the surface through the fibrous oil conducting material.

Abstract: A lubricant-containing polymer-filled rolling bearing comprising a lubricant-containing polymer packed in the space formed by an outer race, an inner race and rolling elements, wherein the lubricant-containing polymer is packed with the interposition of a grease layer having a thickness of from 10 &mgr;m to 1,000 &mgr;m formed at least on the inner peripheral surface of the outer race, the outer peripheral surface of the inner race and the surface of the rolling elements and a lubricant-containing polymer-filled rolling bearing comprising an inner race, an outer race, a plurality of rolling elements provided between the inner race and the outer race, a cage protruding outwardly from the end face of either the inner race or the outer race and retaining the rolling elements, and a lubricant-containing polymer packed in the space formed by the inner race, the outer race, the rolling elements and the cage, wherein the cage is covered with the lubricant-containing polymer.

Abstract: A cage-guided seal is provided with an annular support body, formed preferably from sheet metal, and punched-out retention sections that are adapted to engage the side ring of a standard commercial cage. The peripheral edges of the support body extend close to the sealing surfaces of the inner and outer bearing races and are provided with sealing lips of vulcanized elastomers that engage the inner and outer bearing races.

Abstract: The invention has plural plate-like members, each molded by a metal die using a synthetic resin material in a shape having pockets for retaining rolling elements. A shape obtained by mutually connecting each of the plural plate-like members with connecting portions at both ends is a substantially cylinder shape. A shape of a section between both end portions of each plate-like member has a convex warped shape constituting a part of the cylinder by being subjected to a distortion action owing to heat contraction after being molded by the metal die.

Abstract: A cylindrical roller bearing comprises an inner race, an outer race, a plurality of cylindrical rollers disposed between the inner race and the outer race, and a cage disposed between the inner race and the outer race and provided with pocket portions in which the plurality of cylindrical rollers are respectively accommodated. The cylindrical roller bearing satisfies a following relations 1.5×10−3D≦H≦9.0×10−3D and A/B=0.6˜1.

Abstract: A roller cage for an axial-thrust bearing in a rotating machine has a substantially flat annular body with a first face, a second face, a radially inner surface, a radially outer surface, and a plurality of radially-arrayed substantially rectangular roller pockets with axially oriented sidewalls and endwalls. The cage also has features which provide enhanced flow of lubricant, present within the rotating machine, through the radially arrayed roller pockets during operation of the rotating machine. Rollers are retained within the pockets by a single projection on the sidewall of each pocket at the first face and another single projection on the other sidewall at the second face. Cage design in conjunction with inner and outer race design assures direction of lubricant flow to locations with greatest lubrication and cooling requirements.

Abstract: A cage for ball bearing having pockets 7 the inner surface of which comprises a spherical surface portion 15 and a pair of cylindrical surface portions 16 on the opposite sides of the spherical surface portion 15 connected continuously to the opposite edges of the spherical surface portion 15, the spherical surface portion 15 having a radius of curvature slightly larger than the radius of curvature of the rolling contact surface of the balls to be held in the pockets 7, wherein the area of the spherical surface portion 15 in sliding contact with the rolling surface of the balls is decreased to smoothly supply the pockets 7 with lubricant to decrease the cage sound caused due to friction.

Abstract: There is provided a bearing sealing device capable of substantially completely preventing a leak of grease. A taper end portion of an axial extension of the bearing sealing device has an opposite surface and a rake face that forms a specified rake angle with the opposite surface. The opposite surface forms a narrow passage between the opposite surface and an outer peripheral surface of an inner ring. The narrow passage allows air to pass easily, but it allows grease to hardly pass therethrough. Further, the axial extension includes part of a core metal that extends axially and has its foremost end located axially inside an axial outermost end of the outer peripheral surface of the inner ring. Grease moving axially outwardly on the outer peripheral surface is moved along the rake face of the taper end portion and then guided along a cover portion of the bearing sealing device to an outer ring. The part of the core metal prevents the axial extension from being bent radially outwardly by a centrifugal force.