A thrust sliding bearing 1 includes: a synthetic resin-made upper casing 3 which has a vehicle body-side seat surface 10 for a mounting member 8 on a vehicle body side and an annular lower surface 2; a synthetic resin-made lower casing 5 on which an annular upper surface 4 opposed to the annular lower surface 2 and a spring seat surface 25 for a suspension coil spring 7 are integrally formed, and which is superposed on the upper casing 3 so as to be rotatable about an axis O of the upper casing 3 in an R direction; and a synthetic resin-made thrust sliding bearing piece 6 which is disposed in an annular gap 9 between the annular lower surface 2 and the annular upper surface 4, and has an annular thrust sliding bearing surface 51 which slidably abuts against at least one of the annular lower surface 2 and the annular upper surface 4.

A bearing device includes a bearing member provided with a circumferentially extending sliding surface and a housing holding the bearing member on an inner circumferential surface thereof. The bearing member is provided with a bearing outer peripheral surface on one side thereof facing the housing. The bearing outer peripheral surface is surface roughened. The housing is provided with a housing inner peripheral surface on one side thereof facing the bearing member. The housing inner peripheral surface is surface roughened. When a mean height Rc of a roughness curve element of either of the bearing outer peripheral surface and the housing inner peripheral surface is X m, the remaining other of the bearing outer peripheral surface and the housing inner peripheral surface has a material ratio Rmr (X m) of roughness curve being equal to or less than 10% in at least one measurement direction.

A reduction in the setting of rollers in a self-aligning roller bearing is provided. The self-aligning roller bearing has inner and outer bearing rings and rollers arranged at least in one roller row. The rollers have a curved lateral surface the direction of the rotation axis and has a radius, and roll over curved raceways of the bearing rings. The raceways are each assigned a groove point around which the curved raceway extends at a radial distance in the direction of the rotation axis. A pressure line intersects the rotation axis at an angle of 90 at a point where these rollers have their largest roller diameter, and the radius of the curved lateral surface is smaller than both radial distances.

A method of manufacturing a hub seal is provided. In the method, a lip reaction force F/hub diameter D and a lip surface roughness R are selected from within a designed region, which is a region of the lip reaction force F/hub diameter D and the lip surface roughness R, set in advance on the basis of a value (lip reaction force F/hub diameter D) given by dividing a reaction force F, which is a value of a reaction force of the side lip in an in-use state, by a hub diameter D, which is a value of a diameter of a hub, and the lip surface roughness R, which is a value of a surface roughness of a seal surface of the side lip. The hub seal is designed such that the lip reaction force F/hub diameter D and the lip surface roughness R become the selected lip reaction force F/hub diameter D and lip surface roughness R. The hub seal is manufactured based on the designed hub seal.

A sliding element with one substrate and at least one layer of a sliding layer material applied to the substrate is described. The sliding layer material can consist of a sliding coating with at least one cross-linkable bonding agent or at least one high-melting thermoplastic material or which consists of a material with a matrix of at least one high-melting thermoplastic material or at least one duroplastic material. This sliding layer material contains Fe.sub.2O.sub.3 with a preferred proportion 0.1 to 15% by volume.

A wheel bearing apparatus has an outer member, an inner member and double row rolling elements freely rollably contained between double row inner raceway surfaces and outer raceway surfaces of the inner member and the outer member. A plurality of bolt insertion bores, that fastening bolts pass through to fasten to the knuckle, are formed on the body mounting flange at plurality of positions circumferentially along the body mounting flange. The outer member is previously formed by hot forging. A seating surface for the fastening bolts is formed on an outboard-side surface of the body mounting flange by cold forging.

A bearing assembly having an inner race ring (14) that defines an inner raceway and an outer race ring that defines an outer raceway on which the plurality of rolling elements (22) roll. The bearing raceways are machined using surface finishing operations to create preferred surface profiles and textures for improving lubrication performance. The profile of the raceway is initially created using a first grinding process to form a rough surface profile including a rough central band (34) and rough recessed side bands (38). A second grinding process is used to smooth the central band. This raceway surface profile increases lubrication performance.

Wettable structures that retain liquid layers are defined at surfaces of substrates. The wettable structures include grooves or ridges that are spaced apart by between 10 nm and 10 m and can be defined in substrate or in a layer formed on a surface of the substrate. In typical examples, wettable structures are defined with hydrophobic materials or at hydrophobic surfaces and produce hydrophilic surfaces.

A rolling bearing 1 includes an inner ring 2 and an outer ring 3 that are raceway rings, and a plurality of balls 4 interposed between the inner ring and the outer ring. The outer ring 3 is fitted to a housing 10. The rolling bearing 1 includes a surface coating film 8 on an outer ring outer diametrical surface 3a that is a fitting surface with the housing 10. The surface coating film 8 contains: a binder containing two or more kinds of thermosetting resins having different average molecular weights; and a solid lubricant. The solid lubricant contains molybdenum disulfide, polytetrafluoroethylene resin, and graphite.

A wear resistant bearing system includes an inner member that has an internal core and a bearing surface which has a 50 Rockwell C scale hardness or greater. The inner member has a chemical composition that is uniform throughout the internal core and the bearings surface. The wear resistant bearing system includes an outer member that partially surrounds the inner member and includes a receiving surface that has liner system adhered thereto. The liner system includes a wear resistant matrix that has one or more reinforcing fiber systems and has one or more lubricative fibers system dispersed in the wear resistant matrix. The liner system has a wear surface that has portions of both the reinforcing fiber system and the lubricative fiber system. The wear surface is continuous.