A hub unit bearing includes: a hub spindle; an inner ring; an outer ring member; a plurality of tapered rollers that are rollably provided between outer circumferential surfaces of the hub spindle and the inner ring and an inner circumferential surface of the outer ring member; a cage including a large-diameter-side annular part, a small-diameter-side annular part; and a sealing device including a metal insert, wherein: the metal insert includes a cylindrical part that is mounted on the inner circumferential surface of the outer ring member and a flange part that radially extends inward from one end of the cylindrical part; and an engaging projection is provided on an outboard side end face of the large-diameter-side annular part of the cage, and an engaging groove engaged with the engaging projection is provided on an inboard side end face of the flange part of the metal insert.

A roller bearing cage that includes a cylindrical body including a plurality of pocket holes defined within and positioned circumferentially about the cylindrical body. Each pocket hole includes a pair of side portions and a pair of end portions meeting with the pair of side portions at a corner portion. The corner portion is contoured with a compound radius.

A roller bearing cage, including: an axis of rotation; a body including a plurality of bars, each bar having a length, in a first axial direction parallel to the axis of rotation, a height, in a radial direction orthogonal to the axis of rotation, less than the length and a width, in a circumferential direction, less than the height; and a plurality of spaces, each space circumferentially disposed between a respective pair of circumferentially adjacent bars and arranged to receive a respective roller.

In a self-aligning roller bearing, in a longitudinal section including a center line of a spherical roller and an axis of the self-aligning roller bearing, a clearance X between an outer end surface of a spherical roller on an axially outer side of the self-aligning roller bearing and a rib portion, and a clearance Y between an inner end surface of the spherical roller on an axially inner side of the self-aligning roller bearing and a guide ring have a relation of X<Y.

A bearing cage for a roller bearing assembly includes an annular body defining a circumferential centerline extending therethrough. The annular body includes an outer circumferential surface, an opposing inner circumferential surface, and a plurality of circumferentially spaced roller cavities defined therein. Each roller cavity of the plurality of roller cavities is configured to receive an associated roller element. Each roller cavity includes a first radial cross-wall defined within the annular body extending from the outer circumferential surface to the inner circumferential surface. Each roller cavity further includes an opposing second radial cross-wall defined within the annular body extending from the outer circumferential surface to the inner circumferential surface. At least a portion of the first radial cross-wall and at least a portion of the second radial cross-wall are complimentary to the associated roller element.

A cage segment for a bearing rotatable around an axis being able to receive a plurality of rolling elements configured to travel on two annular raceways respectively on inner and outer rings of the bearing, and including an inner wall that extends circumferentially in the form of a cylinder, the axis of symmetry being the axis (X1), an outer wall that extends circumferentially in the form of a cylinder, the axis of symmetry being the axis (X1), two end portions that are circumferentially opposed, which extend radially with respect to the axis (X1) and which connect together the inner wall and the outer wall, a plurality of successive pockets for receiving the rolling elements, so that two successive pockets are circumferentially delimitated by a radial beam, The radial beam extending radially with respect to the axis (X1), the radial beam comprising two end portions so that one end portion connects with the inner wall and the other end portion connects with the outer wall, The radial beam provides a first recess that extends axially with respect to the axis (X1).

A roller bearing cage, including: an axis of rotation; a body including a plurality of bars, each bar having a length, in a first axial direction parallel to the axis of rotation, a height, in a radial direction orthogonal to the axis of rotation, less than the length and a width, in a circumferential direction, less than the height; and a plurality of spaces, each space circumferentially disposed between a respective pair of circumferentially adjacent bars and arranged to receive a respective roller.

A bearing cage for a roller bearing assembly includes an annular body defining a circumferential centerline extending therethrough. The annular body includes an outer circumferential surface, an opposing inner circumferential surface, and a plurality of circumferentially spaced roller cavities defined therein. Each roller cavity of the plurality of roller cavities is configured to receive an associated roller element. Each roller cavity includes a first radial cross-wall defined within the annular body extending from the outer circumferential surface to the inner circumferential surface. Each roller cavity further includes an opposing second radial cross-wall defined within the annular body extending from the outer circumferential surface to the inner circumferential surface. At least a portion of the first radial cross-wall and at least a portion of the second radial cross-wall are complimentary to the associated roller element.

A cage segment for a segmented bearing cage for large rolling bearings includes first and second lateral sides and first and second ends that together define a pocket configured to receive a rolling body. The first and second lateral sides each include an inner surface configured to face a running surface of the rolling body, and the first and second ends each include an inner surface configured to face end surfaces of the rolling body. The inner surface of the first lateral side includes at least one contact element protruding into the pocket and configured to contact the at least one rolling body, and the inner contact element is continuously connected to the first lateral face. Furthermore, a material thickness of the inner contact element corresponds substantially to a material thickness of the first lateral side at a location spaced from the at least one inner contact element.

A roller bearing cage that includes a cylindrical body including a plurality of pocket holes defined within and positioned circumferentially about the cylindrical body. Each pocket hole includes a pair of side portions and a pair of end portions meeting with the pair of side portions at a corner portion. The corner portion is contoured with a compound radius.