A bearing assembly comprises an outer ring and an inner ring radially inward of the outer ring and cooperating therewith to form a roller volume. The inner ring has opposed faces including slots extending axially and circumferentially spaced. The slots extends axially to openings into the opposed axial faces and communicate with partial circumferential slots in the inner circumferential surface and in fluid communication with the roller volume through passages in the inner ring. A first plurality of the axial slots has a radial depth increasing from a first of the axial faces to the respective partial circumferential slot. A second plurality of the axial slots has a radial depth increasing from the second of the axial faces to the respective partial circumferential slot. Bearing elements are in the roller volume rollingly disposed against the outer ring and the inner ring.

A component of a rolling-element bearing, such as a bearing inner ring having an inner ring flange, a bearing outer ring having an outer ring flange or a rolling element having an end surface, includes a solid slide layer having a lower coefficient of friction than a material to which the slide layer is attached which slide layer reduces frictional contact between the component and another component against which the slide layer slides during bearing operation.

The rolling bearing provides a first ring and second ring capable of rotating concentrically relative to one another, at least one first wire race mounted in the first ring, at least one second wire race mounted in the second ring, and at least one row of radial rollers radially interposed between raceways provided on the first and second wire races. The second ring comprises at least two guide flanges to axially retain therebetween the row of radial rollers. The first ring includes at least one retaining rib extending into the radial space that exists between the first and second rings and towards the second ring, the retaining rib protruding radially relative to the raceway of the first wire race.

A rolling bearing having a first ring and second ring capable of rotating concentrically relative to one another, at least one first wire race mounted in the first ring, at least one second wire race mounted in the second ring, and at least one row of radial rollers radially interposed between raceways provided on the first and second wire races. The second ring provides at least two guide flanges to axially retain therebetween the row of radial rollers. The axial length of the raceway of the first wire race is greater than the axial length of the raceway of the second wire race.

A hybrid module includes a first component, a second component, a first bearing, and a retainer. The first component has a pilot surface and a threaded portion, and the second component has a shaft and a tool. The tool has a first drive profile. The first bearing is installed on the pilot surface and the retainer is threaded onto the threaded portion. The retainer has a second drive profile, complementary to the first drive profile. A second bearing may be installed between the first component and the shaft, and a retaining ring may be installed in the shaft or the first component to prevent axial displacement of the shaft relative to the first component. The retainer may be disposed on a first axial side of the first bearing, and the second bearing may be disposed on a second axial side of the first bearing, opposite the first axial side.

A roller bearing (2) having a sleeve (5), by which a rolling element raceway is formed, and a lid (1) held to the sleeve by a snap-on connection, wherein the lid has securing projections (17), which are directed outward, which protrude beyond the sleeve (5) in the radial direction and are provided for axially fixing the lid in a housing (4) surrounding the sleeve.

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.

A rolling element for a roller bearing. The rolling element may include a metal substrate having a surface layer. A portion of the surface layer may include a hardened nitrided layer. A diamond-like carbon (DLC) coating may be bonded directly on at least a portion of the hardened nitrided layer.

A roller bearing (2) having a sleeve (5), by which a rolling element raceway is formed, and a lid (1) held to the sleeve by a snap-on connection, wherein the lid has securing projections (17), which are directed outward, which protrude beyond the sleeve (5) in the radial direction and are provided for axially fixing the lid in a housing (4) surrounding the sleeve.

A bearing ring for a taper roller bearing defining a guiding flange (36, 110) and a raceway (112), wherein the bearing ring comprises a retainer element (77, 120, 124) that is removably engageable with the raceway. Embodiments of the invention also relate to a roller bearing assembly comprising such a bearing ring, and wind turbine arrangements incorporating such a roller bearing assembly.