A brake assembly including an operating shaft, a yoke, and a rotating element. The rotating element bearing may be positioned between a convex bearing surface of the operating shaft and a concave bearing surface of the yoke such that the rotating element bearing may be configured to move relative to the operating shaft and relative to the yoke during actuation of the brake.

A bearing cage assembly comprises multi-group rollers (2), each group has multiple rollers, and each roller is a barrel roller, multiple rollers are stacked together to form a group of rollers, and the end surfaces of each two adjacent rollers contact with each other. Multiple groups of pockets (11) are formed in the cage, and each group of pockets has multiple pockets. The pockets in any group are distributed along the circumference direction of the said cage, and a group of rollers is disposed in each pocket. Multi-group rollers can roll in circumferential direction of the cage. During the rolling process, a great number of contact points are distributed on the raceways, thus the load capacity of the bearing is improved, the friction resistance is low, suitable for the fields where high speed operation is necessary. A planar thrust bearing, a radial bearing and a conical radial-thrust bearing are provided.

A cage for a tapered roller bearing includes a large-diameter-side annular portion circumferentially extending along large end surfaces of a plurality of tapered rollers; a small-diameter-side annular portion circumferentially extending along small end surfaces of the tapered rollers; and a plurality of pillars coupling together the large-diameter-side annular portion and the small-diameter-side annular portion. The large-diameter-side annular portion has large-diameter-side pocket surfaces opposed to the large end surfaces of the respective tapered rollers. The large-diameter-side pocket surfaces include oil retaining holes including blind holes, and being configured to receive and retain lubricating oil by capillary action.

In the tapered roller bearing, at least any one of an outer ring, an inner ring, and a plurality of tapered rollers includes a nitrogen enriched layer. An oil retaining hole is provided in a larger annular portion of a cage. A value of a ratio R/R.sub.BASE is not smaller than 0.75 and not greater than 0.87 where R represents a set radius of curvature of a larger end face of the tapered roller and R.sub.BASE represents a distance from a point which is an apex of a cone angle of the tapered roller to a larger flange surface of the inner ring. A ratio R.sub.process/R is than not lower 0.5 where R.sub.process represents an actual radius of curvature after grinding of the larger end face of the tapered roller and R represents a set radius of curvature.

Two projecting portions (45a and 45b) configured to guide a tapered roller (3) on distal end surfaces thereof are formed on a side surface (43a) of a pillar portion (43) of a retainer (4) so as to be separated apart from each other in a roller axis direction. The projecting portions (45a and 45b) are separated apart from each other in the roller axis direction with respect to both a small-diameter-side annular portion (41) and a large-diameter-side annular portion (42). The projecting portions (45a and 45b) each have a force-fit margin (F).

An inner ring unit includes an inner ring, a plurality of tapered rollers, and a cage having an annular shape. The cage includes a plurality of cage bars. The cage includes a stopper portion that is provided to protrude from an axial intermediate portion of the cage bar in the circumferential direction of the cage and configured to hinder the tapered rollers from falling off toward a radially outer side by bringing an axial intermediate portion on an outer peripheral surface of each tapered roller housed in a pocket into contact with the stopper portion. The axial intermediate portion on the outer peripheral surface of the tapered roller is a portion that is disposed on a one axial side and on the radially outer side of the tapered roller with respect to the center of gravity of the tapered roller.

A bearing cage assembly is disclosed. The assembly includes a stiffening ring formed from a first material, and a cage formed from a second material that is different than the first material. The cage includes a plurality of arms extending axially away from a base rim. The plurality of arms define a plurality of rolling element pockets therebetween. Each of the plurality of arms defines a slot dimensioned to receive a portion of the stiffening ring, such that the stiffening ring is secured to the cage via engagement within the slots of the plurality of arms.

A method of manufacturing, comprising utilizing at least one cycloid machine to machine a component blank, wherein the component blank includes a plurality of pockets, guiding a tool cutting lip of a chisel along a cycloid path relative to the component blank rotating about a component rotation axis in a component direction of rotation, rotating the chisel about a tool rotating axis, wherein the tool rotating axis is arranged offset to the component rotating axis, machining the plurality of pockets, wherein a radial vector to a tool rotation axis that extends through a cutting edge of the tool cutting lip, and dividing the tool cutting lip into a clearance angle portion and into a rake angle portion, wherein the clearance angle portion is configured to be at least twice as large as the rake angle portion of the chisel.

The present disclosure relates to a self-aligning roller bearing comprising an inner bearing ring, an outer bearing ring and at least one row of roller elements interposed in-between the inner and the outer bearing ring. The roller bearing further comprises a cage comprising a ring-formed first cage portion and a plurality of distributed cage pocket bars protruding axially outwardly from an axial side face of the first cage portion, delimiting a plurality of cage pockets for the roller elements. The side face comprises one or more protrusions adapted to respectively abut a portion of an axial end face of a respective roller element, which portion comprises at least a radial centre of the roller element.

A transport-securing unit for retaining a plurality of rollers in a rolling-element bearing cage during transportation may include an annular region and a plurality of axially extending, circumferentially spaced projections extending from the annular region. Also, an assembly of the transport-securing unit, a rolling-element cage and a plurality of rollers in pockets of the rolling-element bearing cage, where the transport-securing unit is formed separately from the rolling-element bearing cage, and where the projections extend inside the cage and limit radially inward movement of the rollers relative to the cage.