Disclosed is a self-lubricating composite friction part (1) that can be subjected, during operation, to temperatures that are at least equal to 250° C. The part includes, along the friction surface (2), a single layer of a material consisting of weft and warp yarns made of polytetrafluoroethylene, the material being impregnated with a thermostable resin having a glass transition temperature that is at least equal to 250° C. It is applied to a reinforcing layer (3).

A sliding member includes, on a surface of a metal substrate, a surface-treated layer including a zinc-electroplated layer, a chemical conversion-treated layer, and a topcoat layer sequentially stacked on the metal substrate. The chemical conversion-treated layer includes chromium and oxygen. The topcoat layer includes at least one material selected from the group consisting of a silica compound, acrylic resin, polyurethane resin, epoxy resin, phenol resin, and melamine resin. A method of manufacturing the sliding member includes a step of forming, on a surface of the chemical conversion-treated layer, the topcoat layer including at least one material selected from the group consisting of a silica compound, acrylic resin, polyurethane resin, epoxy resin, phenol resin, and melamine resin.

A nacelle for a wind turbine includes a nacelle housing; a rotor hub; a rotor bearing for bearing the rotor hub on the nacelle housing, wherein the rotor bearing has at least one inner ring element and at least one outer ring element, wherein at least one sliding bearing element is formed between the inner ring element and the outer ring element. The sliding bearing element is inseparably connected to the inner ring element or the sliding bearing element is inseparably connected to the outer ring element.

A charging roll includes a core member, a rubber base material disposed around the core member, and a surface layer disposed around the rubber base material. The ten point height of irregularities R.sub.Z of a surface of the surface layer is equal to or greater than 3.9 micrometers, and is equal to or less than 6.1 micrometers. The mean spacing between peaks S.sub.m of the surface of the surface layer is equal to or greater than 12.5 micrometers and is equal to or less than 13.5 micrometers.

A bearing element may include an overlay layer which forms a bearing surface against a steel journal or the like. The overlay layer may be formed from a bearing material comprising a polymer matrix of polyamide-imide polymer material, melamine cyanurate particulate, and metal oxide particulate. A method of forming the bearing element comprising the bearing material are also provided.

A bearing material may include a polymeric matrix of polyamide-imide (PAI) polymer material and a plurality of melamine cyanurate particles dispersed within the polymeric matrix.

A member for guiding an element mobile in oscillation or rotation is presented. The member has a body made of a hardened metallic material, provided with a bore for assembling the mobile element, having cavities that are distributed discontinuously in the bore and capable of acting as grease reserves, and having optional grease supply. In the bore are defined a bearing surface outside of the cavities and the grease supply, and a non-bearing surface in the cavities and the grease supply. The bore includes at least one zone with: cavities having a depth of between 2 and 5 mm, and a quantity of grease in the cavities per bearing surface of between 0.05 and 0.3 g/cm.sup.2. A mechanical system having such a member and a method for manufacturing such a member is also contemplated.

A slide bearing is made of synthetic resin and has an upper case, a lower case combined with the upper case, and an annular center plate placed between the upper case and the lower case so as to allow relative rotation between the upper case and the lower case. The center plate is integrally formed with the lower case. A joining surface of the lower case that joins to the center plate has a grip part, and the joining surface of the center plate has a grasp on the grip part.

A strut bearing including a housing including a top piece and a bottom piece, and a plurality of low friction components each comprising a low friction layer comprising a low friction material, wherein the plurality of low friction components are bonded to the top piece or the bottom piece of the housing.

Various teachings herein may be used to make a bearing bush for a rotating shaft, wherein a wall of the bearing bush has a wall thickness which amounts to less than 10% of the diameter of the bearing bush. In the axial direction, the bearing bush is made from a plurality of layers connected with a material bond. Each layer has a layer thickness between 10 μm and 200 μm and the wall has closed cavities which are filled with a powder.