Abstract: A planar high-density ball bearing comprises a cage and balls; the cage is provided with multiple groups of ball holes for arranging the balls; the ball holes in each group are distributed in the circumferential direction of the cage in an ellipse; the centers of the ellipses in each of which a group of ball holes is distributed coincide with each other, the major axes of the ellipses lie in a common line. The ball holes in adjacent groups are arranged to be staggered in relative to each other in the circumferential direction of the cage, and the balls in the same group of the ball holes are distributed in an ellipse. A method for manufacturing the planar high-density ball bearing, nutation reducer are provided.

Abstract: A thrust bearing has an outer race and an inner race arranged for rotation relative to the outer race about an axis of rotation. Multiple rolling elements are positioned between the inner and outer races. A cage is positioned between the inner and outer races and configured to engage with the rolling elements to align the rolling elements into multiple rows, with the rows circumferentially spaced apart from one another.

Abstract: In a bearing preloading device in which a compression coil spring is used, a hole is defined in a bearing race or in a separate member axially opposed to the bearing race. The hole has an inner periphery constituted by a threaded portion connected to a bottom surface of the hole, and a shallow hole portion connected to an edge of the hole. An inner diameter of the shallow hole portion is larger than an inner diameter of the threaded portion.

Abstract: A bearing support point with at least one axial bearing, in which at least one bearing washer of the axial bearing is held at a structural element, with the bearing washer being formed separately from the structural element and comprising at least one axially aligned track for the axial bearing as well as being fastened at the structural element such that the bearing washer is inserted in an opening of the structural element and is encompassed by the structural element at least at an exterior area and with the bearing washer being supported via the area inside the opening, aligned in the radial direction.

Abstract: A wind turbine rotor hub bearing where the series of mobile members include more than two annular series of such members whereof at least two have different median diameters which are arranged in more than two rows scaled along the bearing rotational axis, with two end rows each comprising a series of roller bearings having individually a rotational axis transversal to the axis and at least an intermediary row of mobile members comprising balls.

Abstract: A bearing support cage includes: an annular forward ring; an annular aft ring; an annular mounting flange disposed between the forward and aft rings; an annular array of axially-extending first spring fingers interconnecting the forward ring and the aft ring; and an annular array of axially-extending second spring fingers interconnecting the mounting flange and the aft ring, wherein the first spring fingers are interdigitated with the second spring fingers. The forward and aft rings, the mounting flange, and the spring fingers are all part of a single monolithic component.

Abstract: A bearing support apparatus for a gas turbine engine, including: a first annular member; a second annular member disposed within the first annular member; first and second axially spaced-apart rolling-element bearings disposed between the first and second annular members so as to enable relative rotation of the first and second members; a first spring element mounting the first bearing to the first member; and a second spring element mounting the second bearing to the first member through the first spring element, such that the first and second bearings are physically supported in series relative to the first member.

Abstract: A thrust bearing assembly includes a single-piece thrust plate and thrust shaft flange having a generally cylindrical body portion, a frustoconical body portion and a bore extending through the cylindrical body portion and the frustoconical body portion. The bore defines a first bore section and a second bore section. A lip extends between the first and second bore sections. The first bore section, the second bore section and the lip are configured to receive a thrust shaft and axial thrust forces transmitted therefrom. The thrust bearing assembly also includes a bearing assembly in operable communication with the single-piece thrust plate and thrust shaft flange. The bearing assembly supports rotation of the thrust shaft and includes a plurality of first rolling elements. The bearing assembly includes a bearing cage to retain the first rolling elements and a plurality of second rolling elements disposed between the bearing cage and the thrust shaft.

Abstract: A roller bearing for a tunneller having an inner ring, an outer ring, two sets of rolling elements arranged between the tracks formed on the rings, the first set of rolling elements including at least one roller able to withstand axial stresses and the second set of rolling elements including an angular-contact roller that is able to withstand both radial and axial stresses, the inner and outer rings being concentric about an axis of rotation of the roller bearing. Each roller in the first set includes a first axis of revolution (Y1-Y1) inclined in relation to the axis of rotation (X-X) by a first angle (?1) of between 45° and 95° and each roller in the second set includes a second axis of revolution (Y2-Y2) inclined in relation to the axis of rotation (X-X) by a second angle (?2) of between 0° and 45°.

Abstract: A bearing arrangement having at least two parts (10, 12) rotatable relative to one another, in which one (10) of the parts has at least one annular groove (14) concentric with the axis of rotation (A), and the other part (12) has a tongue (16) that is complementary to the groove (14) and engaged therein, and in that each of the parts (10, 12) is divided into at least two sectors (10a; 12a) along separating faces that pass through the groove (14) and the tongue (16), the tongue (16) extending over all sectors (12a, 12b) of the corresponding part (12).

Abstract: A thrust plate for use in a drive assembly between an end of an axle shaft and a bearing, the bearing retained within a housing of a rotatable final drive component, the thrust plate having a first end that defines an axle engaging wear surface and a second end that includes an extension configured for fitted engagement with the bearing, the thrust plate further including a central axis of rotation, where the axle engaging wear surface is disposed transverse to the central axis. A thrust plate and bearing assembly for a final drive cover plate includes the thrust plate in combination with a spherical thrust bearing, these components also being provided in a rebuild kit.

Abstract: A wind turbine rotor hub bearing where the series of mobile members include more than two annular series of such members whereof at least two have different median diameters which are arranged in more than two rows scaled along the bearing rotational axis, with two end rows each comprising a series of roller bearings having individually a rotational axis transversal to the axis and at least an intermediary row of mobile members comprising balls.

Abstract: A double row thrust roller bearing includes a pair of inner and outer cages arranged radially in two rows in separate coaxial relation, each cage including an annular inner peripheral wall, an annular outer peripheral wall, a plurality of pillar portions interconnecting the annular inner and outer peripheral walls at intervals in a circumferential direction thereof, and a plurality of pockets each formed between the adjacent pillar portions. Rollers are rotatably held and retained respectively in the pockets. The annular inner peripheral wall of the inner cage is guided by an annular flange formed at an inner peripheral edge of one race, and the annular inner peripheral wall of the outer cage is guided at an inner periphery thereof by the annular outer peripheral wall of the inner cage.

Abstract: A thrust bearing assembly includes a single-piece thrust plate and thrust shaft flange having a generally cylindrical body portion, a frustoconical body portion and a bore extending through the cylindrical body portion and the frustoconical body portion. The bore defines a first bore section and a second bore section. A lip extends between the first and second bore sections. The first bore section, the second bore section and the lip are configured to receive a thrust shaft and axial thrust forces transmitted therefrom. The thrust bearing assembly also includes a bearing assembly in operable communication with the single-piece thrust plate and thrust shaft flange. The bearing assembly supports rotation of the thrust shaft and includes a plurality of first rolling elements. The bearing assembly includes a bearing cage to retain the first rolling elements and a plurality of second rolling elements disposed between the bearing cage and the thrust shaft.

Abstract: A movable race 25 fixed to a movable scroll 20 which revolves with respect to a fixed scroll and a fixed race 24 opposing the movable race are respectively provided with pluralities of annular ball rolling grooves 24c and 25c extending along the revolutionary locus of the movable scroll and a plurality of balls 26 are held sandwiched between the plurality of ball rolling grooves 25c of the movable race and the plurality of ball rolling grooves 24c of the fixed race. Further, the radius of revolution S1 to be obtained by the movable race, the plurality of balls, and the fixed race is made smaller than the radius of revolution S2 to be determined by the scroll wall of the movable race and that of the fixed race.

Abstract: A dual drive motive system used to control the movement or position of another system or structure in a first and second embodiment has two motors, two frame members and a ring moveably mounted between the frame members by means of suitable bearings. One of the motors provides continuous relative motion between the ring and one of the frame members which may be secured to a foundational structure. The other motor provides relative motion between the ring and the other frame member which may be secured to a turret structure. This motion avoids the transient disturbances of lubricants. In a third embodiment, the system includes two armatures which share a common stator. In operation, the armatures and stator which are concentrically positioned rotate relative to each other and in opposite directions. In a fourth embodiment, the armatures share a common stator and the armatures are coaxially positioned.

Abstract: A continuously variable traction roller transmission is disclosed. A torque transmission shaft is provided at one end thereof with a flange portion. A raceway track is formed on a connecting part between an inner side wall of the flange portion and an outer peripheral wall of the torque transmission shaft. Another raceway track is formed on an inner peripheral edge portion of an outer wall of a cam plate which constitutes a pressure mechanism. A plurality of balls are arranged between both of the raceway tracks, whereby a thrust ball bearing is constructed. Thrust load exerted on the cam plate is borne by the thrust ball bearing.

Abstract: Needle bearings are interposed between roller supporting members and collars of thrust bearings for traction rollers, respectively. Each thrust bearing is supported on a pivotal portion of a shaft which is in turn supported at its pivot base portion on each roller support member. Each needle bearing includes a plurality of first needles arranged in a circular array concentric with the pivot base portion of each shaft and a plurality of second needles arranged in a part-circular array along the outer periphery of the first needles.

Abstract: A comb-caged thrust bearing in which a circular-shaped ring or circular-shaped segments are provided for an axial two-row roller race that carries rollers in a large centrally-open roller bearing. The ring or segments form a web with radially oppositely-lying comb stages for holding and guiding the rollers. These comb stages of the web enclose the rollers along three sides of the rollers. Two of those enclosed sides are along oppositely-lying axial lines on the periphery of the rollers. The third enclosed side corresponds to one end of the roller and along a diameter thereof. This diameter has ends connected to the oppositely-lying axial lines on the periphery of the rollers. The other end of the rollers is left free and is not enclosed by the comb stages.