A chain guide includes a plurality of roller shafts provided on one side of a timing chain for torque transmission and spaced from each other in the longitudinal direction of a guide base facing the timing chain. The respective roller shafts rotatably support chain guiding rollers in the form of needle roller bearings. The rollers are cylindrical members having the same diameter over the entire axial direction such that the rollers are movable in the axial direction relative to the timing chain. The rollers are supported so as to be movable in the axial direction. When the rollers and the timing chain move relative to each other in the axial direction and the rollers move relative to the roller shafts in the axial direction, contact portions between the rollers and the roller shafts are displaced in the axial direction, so that radial loads are not locally applied.

The invention provides a bearing device, including a crankshaft, a pair of half bearings each having crush reliefs adjacent to both circumferential ends thereof, a bearing housing having a retaining hole, and one half thrust bearing arranged adjacent to the retaining hole. Each half thrust bearing is configured at least by a bearing alloy layer and a resin slide layer which constitutes a slide surface receiving an axial force of the crankshaft, and thrust reliefs adjacent to both circumferential end portions of the sliding surface so that its wall thickness is made thinner toward the circumferential end surface. A thrust relief length at an inner end portion of the thrust relief positioned on a rear side in the crankshaft rotational direction is formed to be larger than a thrust relief length at an inner end portion of the thrust relief positioned on a front side.

A plain bearing sleeve includes an inner diameter, a sleeve length greater than the inner diameter, an outer diameter, and a wall thickness smaller than 8% of the inner diameter. A sleeve blank includes a longitudinal axis, an outer surface, an inner surface, a first end face, a second end face opposite the first end face, and at least three threaded holes arranged on the first end face. A method for producing the plain bearing sleeve includes clamping the outer surface at the first end face for rotation, machining the inner surface to the inner diameter, fixing the first end face at the at least three threaded holes for rotation, machining the outer surface to the outer diameter, clamping the inner surface at the second end face for rotation, and cutting a ring with the first end face and the at least three threaded holes from the sleeve blank.

A drive shaft has a tubular portion extending between axial ends and is hollow. There are deformations on the tubular portions. The deformations extend for a circumferential extent that is less than 180 about a central axis of the tubular portion.

The present disclosure relates to a low friction bearing liner for a solenoid may include a low friction layer. The low friction layer may include a first fluoropolymer matrix component and a first thermoplastic filler component distributed throughout the first fluoropolymer matrix component. The content of the first fluoropolymer matrix component may be at least about 1 wt. % and not greater than about 99 wt. % for a total weight of the first low friction layer. The content of the first thermoplastic filler component may be at least about 1 wt. % and not greater than about 99 wt. % for a total weight of the first low friction layer.

A bearing including a sidewall including an electrically conductive substrate, and an electrically non-conductive or low-conductive sliding layer coupled to the substrate, where the sidewall includes at least one circumferential rib feature protruding radially inward or radially outward from a bore defining a central axis, where the at least one circumferential rib feature has an aspect ratio between a circumferential length and an axial width of at least 2:1, where the circumferential rib feature is adapted to contact an opposing component such that at a point of contact the bearing has a void area free of sliding layer so as to provide electrical conductivity between the bearing and the opposing component.

A method for prolonging the service life of a product that is subjected to Hertzian contact stress when in use, and which includes a metal surface having at least one indentation, includes removing a first portion of the at least one indentation from the metal surface to provide a remanufactured product having a remanufactured metal surface having a second portion of the at least one indentation, obtaining information about the second portions of the at least one indentation, using the information to estimate potential stress concentrations that are detrimental to lubrication conditions and/or fatigue life of the remanufactured metal surface using analytical modelling, and providing a prediction of the performance of the remanufactured product based on the estimation.

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.

An object of the present invention is to provide a chain guide superior in silence, which includes: a guide base extending in a traveling direction of a chain; a plurality of roller shafts attached to the guide base at an interval along the traveling direction of the chain; and rollers each rotatably supported by one of the roller shafts. The roller has a cylindrical outer circumferential surface for guiding the chain. The outer circumferential surface of the roller has a cylindricity not greater than 20 m.

The disclosure relates to a lubrication-free piece having a friction surface that rubs against a second surface, the lubrication-free piece having at least one structure made from spheroidal graphite cast iron or steel, the external surface of the piece including at least one layer of lubricating thermoplastic polymers, wherein the lubrication-free piece includes a nickel/aluminium-based intermediary layer between the spheroidal graphite cast iron or steel structure and the layer of lubricating thermoplastic polymers.