Abstract: A sheet-metal cage for rolling-contact bearings, comprising at least one cage segment which is bent into a circular shape, of a punched-out sheet-metal strip which interlocks in a dovetailed manner at the joint between segment ends, the joint being fixed with a plastic locking part.

Abstract: A retainer having an annular body with a plurality of pockets. Each pocket has a pair of corner portions that form an opening. The pockets have a spherical inside surface and a pair of tapered surfaces. Alternatively, the pockets can have a spherical inside surface and at least two pairs of tapered surfaces. The geometry of the pockets including the corner portions has rotational symmetry. The retainer improves lubricant retention, and reduces vibration, noise and non-repeating run out.

Abstract: A retainer for a ball bearing being characterized in that each pocket includes upper halves following the entrance, a pair of lower halves following the upper halves, and a bottom portion disposed between lower halves, wherein an inner peripheral surface of each upper half presents a curved surface of a radius of curvature slightly larger than that of the ball to be retained therein in both peripheral and width directions of the pocket, an inner peripheral surface of each lower half descending inwardly, the inner peripheral surface of each lower half and an inner surface of the bottom portion each presents a configuration which has a shape of curved surface in the width direction of the pocket and of a straight shape in the peripheral direction of the pocket so as to contact tangentially with the ball so as to contact tangentially with the ball to be retained.

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: The pocket surface of a pocket with a ball stored therein has a pair of first pocket surfaces respectively formed inside a pair of pawls and a second pocket surface situated between the two first pocket surfaces. The second pocket surface is formed as a spherical-shaped concave surface having a radius of curvature the center of curvature of which is the rotation center of the ball in a no-load state. Each of the first pocket surfaces has a center of curvature shifted from the center of curvature of the second pocket surface toward the opposite side to the entrance (opening) of the pocket by an axially shifting quantity h1, and each of the first pocket surfaces is formed, starting from the present center of curvature, as a spherical-shaped concave surface with its radius of curvature set larger than the radius of curvature of the second pocket surface.

Abstract: A ball bearing has an outer race, an inner race, and a retainer disposed between the outer race and the inner race. The retainer comprises an annular member having a first annular surface and a second annular surface disposed opposite the first annular surface, a plurality of annularly spaced pockets formed in the first annular surface of the annular member, and a plurality of annular spaced fingers each having inner and outer surfaces and projecting generally axially from the first annular surface of the annular member so that the pockets are disposed between adjacent inner surfaces of respective ones of the pairs of fingers, the first annular surface of the annular member having external and internal edges and a plurality of surface portions each disposed between adjacent outer surfaces of respective ones of the pairs of fingers and inclined toward the second annular surface of the annular member from the external edge to the internal edge.

Abstract: The pocket surface of a pocket with a ball stored therein has a pair of first pocket surfaces respectively formed inside a pair of pawls and a second pocket surface situated between the two first pocket surfaces. The second pocket surface is formed as a spherical-shaped concave surface having a radius of curvature the center of curvature of which is the rotation center of the ball in a no-load state. Each of the first pocket surfaces has a center of curvature shifted from the center of curvature of the second pocket surface toward the opposite side to the entrance (opening) of the pocket by an axially shifting quantity h1, and each of the first pocket surfaces is formed, starting from the present center of curvature, as a spherical-shaped concave surface with its radius of curvature set larger than the radius of curvature of the second pocket surface.

Abstract: The present invention provides a rolling bearing that prevents retainer noise and NRRO deterioration thereof by imparting strength and rigidity to a retainer so as to prevent it from being deformed by force from rolling elements and sliding friction. An annular plate is connected to a retainer by bosses. Due to the rigidity of the annular plate, the strength and rigidity of the retainer can be improved. Additionally, since the bosses are fixed to grease reservoirs arranged at an equal spacing therebetween on the circumference of the retainer, the strength and rigidity of the retainer can be equally improved over the entire circumference thereof.

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 a ball bearing being characterized in that each pocket includes upper halves following the entrance, a pair of lower halves following the upper halves, and a bottom portion disposed between lower halves, wherein an inner peripheral surface of each upper half presents a curved surface of a radius of curvature slightly larger than that of the ball to be retained therein in both peripheral and width directions of the pocket, an inner peripheral surface of each lower half descending inwardly, the inner peripheral surface of each lower half and an inner surface of the bottom portion each presents a configuration which has a shape of curved surface in the width direction of the pocket and of a straight shape in the peripheral direction of the pocket so as to contact tangentially with the ball so as to contact tangentially with the ball to be retained.

Abstract: Strength and rigidity are provided to a retainer so as to prevent the retainer from being deformed by force and sliding friction generated by rolling elements thereby preventing occurrence of retainer noise of a rolling bearing and aggravation of NRRO. A retainer is entirely formed of synthetic resin, and a highly elastic synthetic resin is used for the claws which are required to be highly elastic. A part below a boundary L of a body portion is formed of resin with sufficient strength and rigidity to prevent deformation due to force and sliding friction of rolling elements, thus preventing decline in strength of the retainer as a whole which may occur because of the use of resin with high elasticity for the claws. The strength of the retainer as a whole is fully ensured by the body portion, thus improving various functions, contributed by the rolling bearing.

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: This invention relates to a ball bearing cage which defines recesses for receiving balls in a single row. It is in the form of a ring obtained by casting or machining and intended to be interposed between an inner ring and an outer ring of a bearing. The recesses are distributed in two groups, the recesses of the first group each having an opening for positioning a ball located on a first side of the cage, while the recesses of the second group each have an opening for positioning a ball located on a second side of the cage, opposite the first side.

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 roller bearing retainer comprising a substantially ring-shaped member having a plurality of ball pockets formed thereon to hold rolling members. Each ball pocket has a flat portion formed at its bottom portion and an opening portion extending from the flat portion of the retainer's ball pockets for receiving a rolling member. Each rolling member is held by a ball pocket having the flat portion whereby movement of the rolling member is suppressed. At the same time, a sufficient gap may be formed between the rolling member and a concave surface other than the flat portion. Thus, lubrication oil may readily be placed into the gap.

Abstract: A cage for a radial ball bearing formed generally in an annular shape and provided with a plurality of pockets with openings arranged in a circumferential direction to rotatably hold a plurality of balls adapted to rotate around a rolling central axis in the pockets, each of the pockets having an inner surface portion which includes a peripheral edge portions along the opening on the peripheral surfaces of the cage and is formed with an axial cylindrical surface having a central axis placed in the rolling central axis of the ball.

Abstract: In a roller bearing retainer generation of vibration may be suppressed and sufficient lubrication performance may be ensured. A flat portion 5 is formed at a bottom portion of each ball pocket 4 having an opening portion formed on one side surface in an axial direction of a flat-shaped member in a circumferential direction. A rolling member is held by the ball pocket 4 which has the flat portion 5. A movement of the rolling member is suppressed. At the same time, a sufficient gap may be formed between the rolling member and a concave surface other than the flat portion 5 may be formed. Thus, lubrication oil may readily be spread into the gap.

Abstract: The invention concerns a cage device (17) for maintaining balls in a ball bearing comprising at least a row of balls arranged between two raceways, said cage comprising a ring-shaped part (18) axially adjacent to said balls and a plurality of slots (22) in each of which is arranged a ball, a slot being formed by a concave surface, the slots being open on the side opposite the ring and separated by spacing portions (19) extended opposite the ring by lips (21). The concave surface comprises a truncated portion (24) connected to the spherical portion (23).

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: The present invention is intended to provide a pressed retainer which can meet requirements for operation at high temperature and high speed, can sufficiently retain lubricant, does not allow ceramic balls, if used, to cut away track surfaces and is superior in wear resistance, and also intended to provide a ball bearing comprising the pressed retainer.In order to solve problems, in the pressed retainer, wherein two ring-shaped retainer plates, having ball retaining portions and flat portions at predetermined intervals in the circumferential direction thereof, are combined to face with each other so as to form pockets for accommodating balls, a first spherical concave portion and a second spherical concave portion having a curvature radius smaller than that of the first spherical concave portion are formed at the ball retaining portions, and a nitrided layer is formed on the surfaces of the ring-shaped retainer plates. The ball bearing of the present invention uses the pressed retainer and ceramic balls.

Abstract: An expandable bearing retainer includes a retainer body for supporting a plurality of balls, and an expanding mechanism for allowing the bearing body to elastically expand in the circumferential direction so as to increase the inner diameter of the retainer. In a more specific embodiment, the retainer body includes a plurality of circumferentially disposed rolling element retaining openings formed on a first side of the retainer body. A plurality of slits are formed on the an opposite second side of the retainer body for forming the expanding mechanism. Each of the plurality of slits may be disposed between an adjacent pair of the plurality of rolling element retaining holes so as to form an undulating overall shape for the retainer.

Abstract: A separator or cage for an antifriction bearing, particularly a ball bearing, wherein the separator starts as a flat strip with an edge strip on one side, and webs projecting laterally from the edge strip and defining pockets for balls between neighboring webs. The strip is bendable at reduced thickness areas along its length to form a ring for installation of the separator between the annular bearing rings. Radially projecting elastic holding noses defined on the surface of the strip at the webs engage at a race of one of the bearing rings and particularly behind a shoulder at one of the races for preventing axial emergence of the separator from between the bearing rings.

Abstract: A cage for a rolling element bearing, comprising elastically deformable prongs, each pair of prongs defining a cage pocket in which a rolling element can be accommodated by snapping-in. The thickness dimension of each prong, perpendicular with respect to its surface facing the corresponding cage pocket, is gradually diminishing, in the direction towards the free end of the prong. Preferably, the thickness dimension of each prong is diminishing, in general, according to a parabolic function. Thereby, the highest possible retaining force for the rolling elements is obtained, and yet the strains in the prongs upon assembly of the rolling elements are as low as possible.

Abstract: A bearing supporting a rotational shaft of an electric motor includes an outer ring, an inner ring, and an annular retainer disposed between the outer and inner rings for holding a plurality of metal balls so that the balls are rollable. The retainer has a plurality of grease reserve portions formed in its upper end. Each grease reserve portion is enclosed partially by a peripheral wall. The gross amount of grease injected into the bearing is about 10% or less of a volume of an inner space of the bearing defined by the outer and inner rings and upper and lower sealing plates with the retainer and the balls in position.

Abstract: A ball bearing cage is formed with pockets each having an inwardly curved spherical pocket face similar to a ball in shape. At least one of the pockets has a protrusion projecting inwardly thereof from one of inner and outer circumferential edge portions of the pocket face. A ball bearing comprises balls retained between inner and outer bearing rings and equispaced circumferentially thereof by a cage. The cage is formed with pockets each having an inwardly curved spherical pocket face similar to the ball in shape, at least one of the pockets having a protrusion projecting inwardly thereof from an edge portion of the face close to the fixed one of the rings.

Abstract: Material is first formed into a flat ring. Ball retaining pockets are then formed in the flat ring leaving bridge material between adjacent pockets. Bearing balls are inserted into the ball retaining pockets and bridge material between adjacent pockets is then reshaped such that the bridge material wraps partially around the balls, thereby retaining the balls and forming a rigid bridge between adjacent ball pockets. The bridge is proximate a line common to the centers of adjacent balls.

Abstract: A design for a plastic bearing ball separator is moldable by a true, axial draw technique, which provides no resistance to mold parting, but which also provides complete, gripping ball pockets without limiting the degree to which the ball row can be closely packed. Each ball is gripped between a pair of hook shaped fingers which have ball contact zones facing in one direction, and a ball seat between them that faces in the opposite direction. The ball contact zones touch one side of the ball, and since the fingers wrap around the ball in such a way as to miss the centers of the balls, the ball packing or spacing is not restricted. The ball seats touch the other side of the balls, and have no circumferential overlap with the ball contact zones, so the cage may be molded by molds that form the oppositely axially facing surfaces without conflict, and without restriction as the molds are parted.

Abstract: A comb separator or cage for ball bearings, including a ring that has a collar projecting axially out of one face. A groove extends around the distal face of the collar. The collar is separated into webs by spherical cavities that accommodate the balls. Lubrication ducts extend axially through the ring and the webs and open into the groove. The separator accordingly provides the lubricant with access to the balls from both sides and increases the reserve of lubricant. Preferably the grooves are approximately trapezoidal in their radial cross-section.

Abstract: Composite cage for rolling bearings, consisting of cage segments with pockets to hold the rolling elements, the cage segments being held together by connecting elements, characterized in that the cage segments (1a, 1b, 1c and 1d) have axially outward-pointing projections (7, 8) with openings (9) to hold the connecting elements (3, 4).

Abstract: A ball bearing retainer in the form of a unitary molded plastic ring with a plurality of ball receiving pockets spaced circumferentially about the ring. The ball receiving pockets have a generally truncated spherical shape. The pockets have at least two prongs located about the pocket for retaining a ball in the pocket.

Abstract: Self-adjusting ball bearing cage consists of a ring (1), cavities (6) distributed circumferentially and coming out on a face (3) of the ring, spherical housings (4) openings on other face (2) of the ring, and rigid ball holding tabs (7) adjacent to each housing (4) and extending axially from the face of the ring. The tabs (7) of two adjacent housings (4) are connected by an undeformable partition (10) which is axially limited in the direction of face (3) of the ring by the bottom of cavity (6). Each cavity is positioned between two discontinuities of the face (3) formed by elastically deformable pads (13) limited by the bottom of corresponding housing (4).

Abstract: A crown-shaped cage for a radial bearing has a plurality of pockets for receiving balls. The pockets, which have their respective entrances axially on one side of the cage, are spaced from each other at regular intervals in a circumferential direction by partition walls. Each of the partition walls has engagement portions in an inside part thereof at positions opposite the pockets on both sides thereof, the engagement portions on both sides of each of the pockets being to be engaged with each ball so as to stop the ball in radial and axial directions. In each of the partition walls is provided a relief space for allowing deflection caused in the partition walls when the ball is inserted in the pocket. The crown-shaped cage can be made of even a plastic material such as PPS, PEEK or the like which offers excellent heat resistant but low flexibility, due to the presence of the relief space and the engagement portions provided in the inside part of the partition walls.

Abstract: A heat-resistant ball bearing comprising inner and outer races made of a heat-resistant steel, a plurality of balls made of a ceramic, and a crown retainer made of graphite. Preferably, the retainer has a crown shape and comprises a plurality of projections forming a pocket and a cut-away portion connected to the pocket. The width of the cut-away portion is selected to be about 97 to 99% of the diameter of the ball.

Abstract: A comb separator for a ball bearing the bearing comprising axially spaced inner raceways defined in a shaft, outer raceways defined in an outer ring around the shaft and a respective row of bearing balls in the cooperating raceways. A comb separator is provided for each row of bearing balls. The comb separator has a plurality of circumferentially spaced arms facing axially inwardly toward the balls from an annular ring of the separator. First arms include respective lips wrapping around the ball that is in the ball receiving pocket adjacent to the lip. A projection that extends axially is located between the lips of each first arm. Second arms alternate with the first arms and each second arm has an axial passage opening through it for transmitting lubricant through it. A circumferential groove is defined on the axially outward side of the ring of the separator.

Abstract: A plastic ball retainer with a by-pass moldable design includes ball pocket bases joined with connector bars that occupy less radial space than the radial thickness of the pocket bases, with V shaped bridge members spanning the gaps between the pockets that occupy only radial space not occupied by the connector bars.

Abstract: A roller bearing assembly with two rows of rolling elements includes a first ring formed in one piece to have two raceways and two independent rings each having one raceway, a device for maintaining the relative positions of the rolling elements between the rings and a device for fixing the two independent rings axially to one another. The relative positions of at least some of the rolling elements are maintained by two parts of a retention device which includes, before the bearing is assembled, one or more connecting zones in a relatively weakened condition so that they will break during assembly of the rolling bearing assembly.

Abstract: This invention relates to reduction in frictional torque of a harmonic drive type transmission apparatus having a circular spline, a flexspline, and a wave generator. A wave generator bearing of the wave generator has a retainer for holding a number of balls which roll between the inner and outer races to be in contact with an inner race and an outer race and to be separated from each other in the circumferential direction. The ball retainer has a number of radial pockets for storing the balls. Each pocket is formed into a shape forming a narrow (in the circumferential direction) opening portion at the inner race side and a wide (in the circumferential direction) opening portion at the outer race side. The balls are in contact with the opening portion at the inner race side in the pockets at the minor axis positions of a drive cam, and the balls are in contact with substantially the central portion of the pocket inner surface at the major axis positions of the cam.

Abstract: Bearing ball spacing retainer made of elastically-deformable, synthetic material comprising a ring, a number of parts projecting in the direction of the bearing axis and on one side of the said ring, and a number of seats for balls is described; each of the said projecting parts comprises a pair of elastically-deformable tabs projecting in the said direction, a tooth also projecting in the said direction, and a notch designed to separate the said tabs from the said tooth.

Abstract: A prong-type cage for rolling bearings formed by a ring and circumferentially spaced prongs or posts extending axially from the ring, defining pockets for separating the rolling elements, is designed to avoid being damaged when the mold parts are removed by recesses axially extending from the outer face of the ring axially into the posts.