The column portions of the cage includes roller holding portions which restrain the cylindrical roller on an outer diameter side and an inner diameter side thereof. The roller holding portions are formed such that a radial movement amount of the cage with respect to the cylindrical roller from a state where a revolution center of the cylindrical roller coincides with an axial center of the cage is configured so that an outer diameter side movement amount<an inner diameter side movement amount, and an outer diameter side opening width of the pocket portion>an inner diameter side opening width of the pocket portion. The column portion includes an inner diameter side protrusion which protrudes to an inner diameter side than inner circumferential surfaces of the annular portions and which configures the roller holding portions.

A hub bearing module for a lightweight suspension upright or knuckle of a vehicle, the hub bearing module including a wheel bearing and a bearing connection interface to the suspension upright or knuckle, the bearing connection interface being arranged coaxial with the rolling bearing and including a first sleeve element and a second sleeve element arranged radially outside the first sleeve element and including a composite, preferably BMC (Bulk Molding Compound) annular body having a radially inner lateral surface mechanically coupled to the first sleeve element and a radially outer lateral surface configured to mechanically and chemically couple with the suspension upright or knuckle.

A synthetic resin rolling bearing retainer is to be arranged between an inner ring and an outer ring of a rolling bearing. A plurality of guided portions protruding radially outward from an outer diameter surface of the retainer is provided along a circumferential direction of the outer diameter surface. Each of the guided portions has a guide surface protruding to be in sliding contact with the outer ring, a chamfered portion formed at an edge portion of the guide surface, and a groove portion formed at a portion of the guide surface in an axial direction. The guide surface and the chamfered portion have surface properties where an arithmetic average roughness Ra is 1.0 to 9.8 m and a maximum height Rt is 10.1 to 102.9 m. A parting line is provided radially inside the guide surface.

Multi-layer composites and methods of using the composites as a membrane for electroacoustic transducers. The composites and methods comprise at least one first and one second outer layer, wherein at least one of the cover layers being made from a polypropylene sulfide-plastic having a halogen content not exceeding 550 ppm.

The column portions of the cage includes roller holding portions which restrain the cylindrical roller on an outer diameter side and an inner diameter side thereof. The roller holding portions are formed such that a radial movement amount of the cage with respect to the cylindrical roller from a state where a revolution center of the cylindrical roller coincides with an axial center of the cage is configured so that an outer diameter side movement amount<an inner diameter side movement amount, and an outer diameter side opening width of the pocket portion>an inner diameter side opening width of the pocket portion. The column portion includes an inner diameter side protrusion which protrudes to an inner diameter side than inner circumferential surfaces of the annular portions and which configures the roller holding portions.

A sliding member having a sliding surface that is at least partially formed of a surface of a lubricating member is provided. The sliding member includes: a base body as a sintered body of a compact containing metal powder, the base body being integrated with the lubricating member; and the lubricating member as an injection molded product of a resin composition containing a polyarylene sulfide-based resin and a carbon material.

The resin injection gate is disposed at the pillar part. When the bearing cage is divided into first and second regions by an imaginary line connecting the resin injection gate and a weld to be formed at a position radially facing the resin injection gate, a resin reservoir that can store therein the melted resin is formed at the pillar part in only one of the regions. A circumferential distance between the resin reservoir and the weld is smaller than a circumferential distance between the resin reservoir and the resin injection gate. A cross-sectional area of a communicating part of the resin reservoir, which is configured to communicate with the pillar part, is equal to or less than a quarter of a cross-sectional area of the resin injection gate.

This ball joint is provided with: a ball stud having a stud part one end of which is coupled to a stabilizer device or a suspension device, and the other end of which is integrally joined to a ball part; a housing made of a metal material having a space, one end of which is open and which swingably and turnably supports the ball part of the ball stud; and a ball seat interposed between the housing and the ball part. A swaged section for swaging the ball seat is a lump having a mountain-shaped cross-section into which an opening rim part thinner than a trunk section of the housing is deformed by a compressive load.

A thrust sliding bearing may include a thrust receiving surface comprising radial oil grooves, and a resin portion, the resin portion comprising a plurality of resin sheets in an area defined by the oil grooves of the thrust receiving surface, the plurality of resin sheets being laminated. Circumferential widths of the plurality of resin sheets may increase upwardly from a bottom resin sheet. A circumferential width of the resin portion may decrease upwardly.

Provided is a resin bush capable of slidably supporting a shaft when the bush has been fitted in a housing; particularly, a resin bush suitable for use in an environment in which the effects of a difference in thermal expansion coefficients are likely to be prominent, such as a high-temperature environment, even when the housing and the shaft are made of a material such as a metal that has a different thermal expansion coefficient from that of the resin bush. In the resin bush (1), which is molded by extrusion molding, a slit (12) is formed from one axial end surface (11a) towards another axial end surface (11b). A recessed section (13) for a gate (a gate position), which is provided to the one axial end surface (11a), is provided in a position that is deviated from being symmetrical with the slit (12), at least with respect to a center axis O of a bush body (10). The resin used for the material of the bush (1) is a resin having excellent heat resistance and chemical resistance, such as PPS resin or a PEEK resin.