A cage is provided with guidance and retention elements for the cylindrical rolling elements. The cage includes a radially inner rim including a first flange, and a plurality of first retention tabs extend from the first flange that include first and second lateral surfaces. A radially outer rim includes a second flange, and a plurality of second retention tabs extend from the second flange that include third and fourth lateral surfaces. The first and second lateral surfaces of the first retention tabs and the third and fourth lateral surfaces of the second retention tabs face each of the pockets to define lower rolling element retention elements. Webs include first and second rolling element facing guide surfaces that face adjacent ones of the pockets. Upper rolling element retention elements of the webs are provided on an opposite side of a centerline from the lower rolling element retention elements.

A rolling bearing includes an outer ring, a plurality of rolling elements rolling on a raceway surface, and a ring-shaped rolling element fall-off prevention member formed by bending a strip-shaped metal member into a ring shape and welding two ends, and preventing the rolling elements from falling off. The member includes a plurality of pillar portions and a connecting portion. The connecting portion includes a welded and first and second cut portions. As viewed in the axial direction, the cut portions are each provided within an angle range of 45-315 from the welded portion around a center of a shaft. The second cut portion is provided at a position of a window portion located at a position corresponding to 180, or at a position of a window portion adjacent to the window portion located at the position corresponding to 180, with respect to a position of the first cut portion.

A method is provided for producing an angular bearing cage from a sleeve-like blank. In order to significantly reduce the manufacturing costs compared to known solutions even for small series, the method comprises the following steps of: Step A: providing a sleeve-like blank extending along an axis. Step B: rolling a wall section to be formed of the blank while changing the angle of the wall section to be formed relative to the axis of the blank. Step C: introducing rolling element pockets into the rolled wall section. A corresponding device and a correspondingly produced rolling bearing cage or angular bearing cage are also provided.

A spherical roller bearing for a wind turbine main shaft includes an outer ring, an inner ring having a bore with a diameter of at least 499 mm, two sets of spherical rollers which roll on raceways of the rings, and at least one roller cage. Each cage includes an axial inner cage ring extending in a circumferential direction of the bearing, a first axial outer cage ring spaced from the axial inner cage ring on a first axial side and connected by cage bars to form pockets receiving the first set of rollers, and a second axial outer cage ring spaced from the axial inner cage ring on a second axial side and connected by cage bars to form pockets receiving the second set of rollers. The cage bars are at least partially arranged at a position in a radial direction that is offset to a pitch diameter.

A spherical roller bearing has an outer ring with a diameter of at least 499 mm, an inner ring and two sets of spherical rollers accommodated in separate bearing cages. Each bearing cage includes first and second cage rings extending in a circumferential direction of the bearing and a plurality of cage bars extending in an axial direction of the bearing between the first and second cage rings such that closed pockets are formed for receiving the rollers. Each cage bar separates two adjacent pockets and has a first circumferential side face facing a first pocket and a second circumferential side face facing a second pocket, each circumferential side face being provided in the axial direction with a first contact area and second contact area each configured to contact the roller, at least one of the first and second contact areas has a convex curvature in a radial direction.

A spherical roller bearing includes an inner ring, an outer ring, spherical rollers and a cage. The cage has an axially inner ring and an axially outer ring connected by a plurality of cage bars to form pockets to hold the rollers. Each cage bar has an axially extending curvature in the circumferential direction that is at least partially concave, and an axial distance between an apex of the curvature and an axial inner pocket side face is not equal to and preferably larger than a distance between the apex of the curvature and an axial outer pocket side face.