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

A roller bearing assembly for use in a fracking pump crank shaft includes an inner ring being positioned an outer ring and a plurality of rolling elements disposed therebetween. Each of the rolling elements have a bore extending therein. The roller bearing assembly includes a cage having an annular disc with pins extending axially inward therefrom and into the bore. The pins are positioned on the annular disc so that the rolling elements are spaced apart from one another with a gap extending continuously therebetween. The gap is of a predetermined magnitude to maximize the number of rolling elements that fit between the inner ring and the outer ring to maximize load carrying capacity of the roller bearing assembly.

A tiltrotor aircraft may be provided and may include a mast assembly, in which the mast assembly may include a mast; a bearing system; a housing; and a housing cap secured to the housing, wherein the bearing system is between the mast and the housing. The bearing system may further include a first bearing assembly including a first inner race, a first outer race, and a plurality of first tapered roller bearings; a second bearing assembly including a second inner race, a second outer race, and a plurality of second tapered roller bearings; an inner spacer and an outer spacer in which the inner and outer spacers are between the first and second bearing assemblies; and a retaining device in which the retaining device and the housing cap provide, at least in part, pre-loading for the first and second bearing assemblies.

An aero gas turbine engine with a fan stage and a bearing rotatably supporting the fan stage, where the bearing is cooled by passing cooling air through the bearing, and the spent bearing cooling air is re-injected into the air flow path at a location where the effect is minimalized. The location is just downstream from a leading edge of a stator vane and along a pressure side surface of the vane. A fine mist of oil can be discharged into the bearing cooling air to also lubricate the bearing, where both the oil and the spent cooling air is reintroduced into the air flow path.

An object is to provide a mounting structure of a bearing member which enables size and weight reduction of entire apparatus and also contributes to cost reduction thereof. The mounting structure of a bearing member includes: a bearing member for supporting a rotary shaft; a case member to which the bearing member is mounted; and a mounting plate for clamping the bearing member in an axial direction of the rotary shaft in conjunction with the case member, wherein the mounting plate includes a mounting portion of a counter member which is mounted to the case member and clamps the case member in the axial direction in conjunction with the counter member.

A roller bearing assembly including an tapered inner cup defining an inner raceway, an tapered outer cup defining an outer raceway, the outer raceway having a convex profile, the convex profile being defined by an intersection of the outer raceway and a central plane in which a longitudinal center axis of the roller bearing assembly lies, and a plurality of straight rollers disposed between the tapered inner cup and the tapered outer cup so that each straight roller is in rolling contact with the inner raceway and the outer raceway, each straight roller having a first end face, a second end face and a cylindrical body extending therebetween.

A robot joint, including: a housing; an output shaft, at least partially housed inside the housing and provided with a shaft portion and a flange portion at a first end of the shaft portion; a first bearing portion, housed in the housing and supporting a first position of the flange portion of the output shaft; a second bearing portion, housed in the housing and supporting a second position of the output shaft in an axial direction; and a motor, housed in the housing, where the second bearing portion is arranged between the motor and the first bearing portion along the axial direction of the output shaft. Further provided is a robot. By effectively supporting the output shaft at multiple points, the output shaft is enabled to more effectively and stably bear the moment or bending moment of a load, and the robot joint structure is enabled to be compact and lighter.

A roller bearing assembly including an tapered inner cup defining an inner raceway, an tapered outer cup defining an outer raceway, the outer raceway having a convex profile, the convex profile being defined by an intersection of the outer raceway and a central plane in which a longitudinal center axis of the roller bearing assembly lies, and a plurality of straight rollers disposed between the tapered inner cup and the tapered outer cup so that each straight roller is in rolling contact with the inner raceway and the outer raceway, each straight roller having a first end face, a second end face and a cylindrical body extending therebetween.

A thrust roller bearing cage having pockets for accommodating rollers includes an inner annular portion and cage bars that extend in a radial manner from a radially outer edge of the inner annular portion so as to separate the pockets from each other in a circumferential direction. The inner annular portion has a first axial end surface and a second axial end surface. The first axial end surface has an oil passage groove for guiding lubricating oil to the pockets. The second axial end surface is recessed relative to the first axial end surface in an axial direction of the inner annular portion so as to form a recessed portion that communicates with the oil passage groove. The entire region of the first axial end surface that is located radially directly inside the cage bars is located radially outside the second axial end surface.

To provide a synthetic resin thrust plate having usable plane accuracy while eliminating correction of the plane shape thereof with a hot-plate press and a method for manufacturing the same. A synthetic resin thrust plate 1 is a hollow disc-shaped, synthetic resin thrust plate having a plurality of radial grooves 2 and 3 at equiangular intervals in terms of a disc central angle on both thrust faces 1a and 1b, respectively. The grooves 2 on one thrust face 1a and the grooves 3 on another thrust face 1b are the same in number. The grooves 2 on the one thrust face 1a and the grooves 3 on the other thrust face 1b are arranged so as not to overlap with each other in a circumferential direction. In particular, the grooves 2 on the one thrust face 1a and the grooves 3 on the other thrust face 1b are arranged in a staggered manner so as to have an angular deviation of of an angular interval between the grooves adjacent to each other on the same thrust face in terms of the disc central angle.