A bearing unit may be provided with at least one row of rolling bodies and at least one cage for retaining the rolling bodies. The at least one rolling cage may include a base rib; a plurality of fingers spaced circumferentially and extending at least from one side of the base rib; and a plurality of partially spherical cavities for holding the rolling bodies, each cavity being defined by the partially spherical concave surfaces of a pair of fingers of the plurality of fingers and of the base rib. The rolling bodies and the cages are in contact with each other via a plurality of protrusions formed on the partially spherical concave surfaces of the fingers and of the base rib. At least one lateral protrusion may be formed along the surface of each finger of the plurality of fingers of the retaining cage.

The present invention provides bearing cage retainer for a rolling element rotor bearing in a vacuum pump. The bearing cage retainer being configured to have an operational arrangement in which, at the maximum longitudinal axial displacement limit of the outer race in the direction of the retainer, the bearing cage retainer is disengaged from the bearing cage, and a failure configuration characterised by the dislocation of the bearing cage by a longitudinal axial displacement of the bearing cage relative to the outer race in the direction of the retainer and in which the bearing cage retainer engages said bearing cage and the bearing cage maintains the separation of the rolling elements within the bearing.

A bearing assembly includes an outer race, a cage, a plurality of internal rotating members, and an inner race. Lubricant flows through the bearing assembly to withdraw heat generated during operation of the bearing assembly.

A bearing including an axis of rotation, an inner ring, an outer ring arranged radially outward of the inner ring, the outer ring including a radially inner circumferential surface including: a race surface, a first outer ring portion arranged closer, in a first radial direction, to the axis of rotation than the race surface, and a second outer ring portion arranged closer, in the first radial direction, to the axis of rotation than the race surface and the first outer ring portion. The bearing further includes a cage radially arranged between the inner and outer rings.

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.

Bearing unit provided with at least one ring of rolling bodies and, for retaining the rolling bodies, at least one retaining cage which has a cage bar, a plurality of circumferentially spaced cage arms that extend from one side of the cage bar, and a plurality of partially spherical cavities for retaining the rolling bodies; contact points between the rolling bodies and the cage being positioned in the vicinity of a polar region of each rolling body. The minimum number of contact surfaces for containing the rolling bodies in the direction of rotation of the bearing and ensuring contact only in the polar region is equal to two for each rolling body, namely one upper contact surface and one lower contact surface.

A bearing cage includes an annular body disposeable between inner and outer rings and having first and second axial ends, inner and outer circumferential surfaces, and a plurality of pockets for retaining rolling elements. The cage includes at least one channel extending axially through the annular body and having a first opening at the first axial end and a second opening at the second axial end. The channel(s) are each configured to direct liquid to flow axially through the bearing when the cage rotates about the centerline. Alternatively or additionally, the cage includes at least one elongated projection extending radially inwardly from the inner circumferential surface or radially outwardly from the outer circumferential surface and extending axially between the first axial end and the second axial end. The projection(s) are each configured to direct liquid to flow axially through the bearing when the cage rotates about the centerline.

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.

A rolling bearing, wherein the rolling elements are loaded, equipped with a cage separating the rolling elements, wherein at least one groove is situated on the bearing race on which the rolling elements travel, wherein edges of the groove are positioned at an angle α from 4.5° to 80° in relation to the movement direction of the rolling elements, and in the cage, holes for the rolling elements are made askew so that the angle β between a straight line connecting the cage centre with the centre of the hole for the rolling element and a tangent to the rolling element in the contact point of this element with the cage has a value β>arc tg μ, where μ is the sliding friction coefficient of mating of the rolling element material with the cage material.