The present invention provides a resin composition for sliding member and a sliding member having excellent moldability and sliding properties that contains plant-derived polyethylene resin as a main component. In the resin composition for sliding member, as additives, petroleum-derived polyethylene resin of 0.1 to 20% by mass, modified polyolefin resin of 0.1 to 10% by mass, lubricating oil of 0.5 to 5% by mass, and plant-derived filler of 0.1 to 50% by mass are blended in addition to plant-derived polyethylene resin as a main component. A sliding member is produced by molding this resin composition for sliding member.

A protective cap (1, 9, 12) for the partial covering of a pre-fitted or a fully fitted vehicle component (11). The protective cap (1, 9, 12) is made from a biogenic and/or renewable raw material.

A bearing carrier or bearing housing or part of a bearing housing includes at least one organic sheet and/or at least one pre-preg. Also an assembly of the bearing carrier or bearing housing or part of the bearing housing and a bearing having an outer ring mounted in the bearing carrier or bearing housing or the part of a bearing housing.

A protective cap (1, 9, 12) for the partial covering of a pre-fitted or a fully fitted vehicle component (11). The protective cap (1, 9, 12) is made from a biogenic and/or renewable raw material.

A bearing unit includes a radially outer ring, a radially inner ring, and a retention cage configured to retain a plurality of rolling bodies between the radially outer ring and the radially inner ring. The retention cage includes a one-piece annular body having a plurality of radially extending pockets each configured to retain one of the plurality of rolling bodies, and each of the plurality of pockets is bounded by a pocket surface. The pocket surface includes a plurality of convex portions and a plurality of concave portions and is bounded by an inner imaginary cylinder and a concentric outer imaginary cylinder. The convex portions are tangent to or extend in part along the inner imaginary circle, and the concave portions are tangent to or extend in part along the outer imaginary circle.

A bearing unit has a central rotation axis and includes radially inner and outer rings and a one-piece retaining cage having pockets bounded by cage rings and separated by bridges. A plurality of radially outwardly extending protuberances are arranged in a first row and a second row axially spaced from and parallel to the first row on a radially outer surface of the first cage ring and in a third row and a fourth row axially spaced from and parallel to the third row on a radially outer surface of the second cage ring. The protuberances of each first row are circumferentially spaced. The protuberances of the first row are circumferentially offset from the protuberances of the second row, and the protuberances of the third row are circumferentially offset from the protuberances of the fourth row.

A bearing unit has a radially outer ring, a radially inner ring and a retaining cage configured to retain a plurality of rolling bodies between the inner ring and the outer ring. The retaining cage is centered on the radially outer ring and includes a one-piece annular body including a first ring connected to a second ring by a plurality of bridges. A plurality of pockets in the annular body are configured to house and retain one of the plurality of rolling bodies, and the pockets are framed by the first ring and the second ring and are located between adjacent pairs of the bridges. Each of the plurality of pockets has a side wall having a circumference, and a plurality of circumferentially spaced circumferentially extending recesses of substantially square section are located in the side wall of each of the recesses.

A bearing unit has a central rotation axis, a radially outer ring, a radially inner ring, and a retention cage configured to retain a row of rolling bodies between the inner ring and the outer ring. The retention cage is centered on the radially external ring and includes a one-piece annular body having a plurality of through pockets each configured to house and retain one of the rolling bodies. A first ring of material is located on a first axial side of the through pockets, a second ring of material is located on a second axial side of the through pockets, a bridge extends from the first ring of material to the second ring of material between each adjacent pair of the through pockets, and a lightening through opening is located at a first end of each bridge and at a second end of each bridge.