A rolling element shaft assembly includes a solid shaft having a first end and a second end, a tubular shaft configured to receive the shaft first end, and a bearing sleeve coupled to the solid shaft. The bearing sleeve includes a first portion defining a first edge, a second edge, and at least one first bearing aperture, and a second portion defining a third edge, a fourth edge, and at least one second bearing aperture. The first portion is configured to couple to the second portion about the solid shaft. The bearing sleeve further includes at least one first bearing disposed within the at least one first bearing aperture and at least one second bearing disposed within the at least one second bearing aperture.

A deep groove ball bearing includes an outer ring, an inner ring, a retainer and steel balls, where the retainer is disposed between the outer ring and the inner ring, sockets are disposed on the retainer, the steel balls are disposed in the sockets, the retainer is formed by two retainer bodies which are separated from each other, grooves are formed in the retainer bodies at intervals, the grooves in one retainer body are combined with the grooves in the other retainer body to form the sockets, each retainer body is provided with a plurality of sub-connectors which are separated from each other, a first connecting block and a second connecting block are formed at two ends of each sub-connector respectively, two grooves are formed in each sub-connector, and a positioning table is disposed between the two grooves in each sub-connector.

A rolling element cage for positioning a plurality of rolling elements between two rail elements of a telescopic rail or a linear guide which are mounted so as to be movable relative to each other is provided. The rolling element cage is composed or can be composed of two or more module elements which include a base module and one or more extension modules. Each module element has at least two receiving legs, each having one or more openings for receiving rolling elements, and at least one connecting section connecting the two receiving legs, the base module and the one or more extension modules being fixedly or releasably connected or connectable to one another in series in the longitudinal direction of the rolling element cage via fasteners.

The present disclosure provides a cage for bearings. The cage includes a pocket (2) for accommodating a rolling element of the bearing. The pocket (2) completely encloses the corresponding rolling element on a cylindrical surface where a pitch circle of the cage is located. The pocket has a roughly ellipsoidal shape. The ellipsoidal shape of each pocket (2) has a major axis L1 and a minor axis L2. The major axis L1 and the minor axis L2 satisfy the following relationship: L2<L1?1.07L2. Through this arrangement, there may be a smaller circumferential clearance or axial clearance between the rolling element and the pocket, so as to improve the vibration of the whole bearing according to different load requirements. The present disclosure also provides a bearing comprising the cage.

The present disclosure provides an arc-shaped segment (1) for assembling a segmented bearing cage. An arc length L and a radian angle ? of the arc-shaped segment (1) satisfy the following relationship: 360L/?D?20????360L/?D+30? with D being a diameter of the segmented bearing cage. The arc length L refers to an arc length corresponding to the radian angle ? of the arc-shaped segment (1). The present disclosure also provides a segmented bearing cage comprising a plurality of arc-shaped segments (1) as mentioned herein. And the present disclosure provides a bearing comprising the segmented bearing cage. After being assembled in the bearing, a plurality of arc-shaped segments abut on or connect with each other, to form a complete cage. Relevant structures and dimensions of the arc-shaped segments can be designed according to the diameter of the interested bearing and the actual needs.

A ball retainer includes a chain belt, a hook, and a slot portion. The hook is arranged on the first end of the chain belt. The hook includes a neck portion, a hook body, two leaning protrusions, and a limiting protrusion. The hook body is connected to the neck portion. The two leaning protrusions extend outward along the short side direction of the chain belt toward two sides of the hook body, respectively. The slot portion is arranged on the second end of the chain belt. The slot portion includes a slot, two abutting portions, a connecting portion, and a receiving portion. After the hook is correspondingly engaged with the slot portion, the hook body is accommodated in the slot, the two leaning protrusions correspondingly lean against the two abutting portions, the neck portion leans against the connecting portion, and the limiting protrusion is correspondingly accommodated in the receiving portion.

An assembly for a rolling element bearing, the assembly including a first cage segment and a second cage segment which are releasably connectable to one another, and at least one rolling element. The assembly further comprises a cage pocket for receiving the at least one rolling element. The cage pocket is at least partly defined by a cage pocket wall of at least one of the first cage segment and the second cage segment. The assembly is such that, when the at least one rolling element is in the cage pocket, the at least one rolling element prevents the first cage segment and the second cage segment from being releasably disengaged. A rolling element bearing can incorporate such an assembly.

A deep groove ball bearing includes an outer ring, an inner ring, a retainer and steel balls, where the retainer is disposed between the outer ring and the inner ring, sockets are disposed on the retainer, the steel balls are disposed in the sockets, the retainer is formed by two retainer bodies which are separated from each other, grooves are formed in the retainer bodies at intervals, the grooves in one retainer body are combined with the grooves in the other retainer body to form the sockets, each retainer body is provided with a plurality of sub-connectors which are separated from each other, a first connecting block and a second connecting block are formed at two ends of each sub-connector respectively, two grooves are formed in each sub-connector, and a positioning table is disposed between the two grooves in each sub-connector.

A ball retainer includes a chain belt, a hook, and a slot portion. The hook is arranged on the first end of the chain belt. The hook includes a neck portion, a hook body, two leaning protrusions, and a limiting protrusion. The hook body is connected to the neck portion. The two leaning protrusions extend outward along the short side direction of the chain belt toward two sides of the hook body, respectively. The slot portion is arranged on the second end of the chain belt. The slot portion includes a slot, two abutting portions, a connecting portion, and a receiving portion. After the hook is correspondingly engaged with the slot portion, the hook body is accommodated in the slot, the two leaning protrusions correspondingly lean against the two abutting portions, the neck portion leans against the connecting portion, and the limiting protrusion is correspondingly accommodated in the receiving portion.

A cage for a rolling bearing, wherein the cage is intended to ensure the circumferential spacing of a row of rolling elements. The cage comprises pockets for the rolling elements and connecting tabs. Each connecting tab connects two successive pockets. At least one recess is formed in a thickness of at least one of the tabs.