A slide bearing in the present invention is formed in a cylindrical shape and has an inner peripheral surface sliding along an axis, the slide bearing includes: a first groove in which the extension direction is a direction having a component in a circumferential direction on the inner peripheral surface; and at least two second grooves that are branched from the first groove and in which the extension directions are directions each having a component in an axial direction at least within a predetermined range from the first groove. Within a predetermined range from an end opposite to the first groove of the second groove, the width or the depth gradually decreases toward the end.

A rolling bearing includes: an inner ring; an outer ring; and a plurality of rolling elements provided between the inner ring and the outer ring, wherein: one of the inner ring and the outer ring is a rotating ring; the other one of the inner ring and the outer ring is a firm ring; the firm ring is attached to a prescribed member; and a black oxide film having a mesh-shaped crack is formed on at least one surface of a fitting surface of the firm ring and a side face of the firm ring, the fitting surface facing the prescribed member in a radial direction of the rolling bearing, the side face making contact with the prescribed member in an axial direction of the rolling bearing.

A rolling bearing includes an inner ring, an outer ring, a plurality of balls, and a cage that holds the balls. An annular groove for creep suppression is formed in a fitting surface that is fitted on a housing to which an outer ring is attached. The annular groove has a groove bottom portion and a pair of tapered surface portions extending from opposite sides of the groove bottom portion in an axial direction and defining a groove width that is larger toward the fitting surface. In a section including a bearing center line, each of the tapered surface portions has a linear sectional shape inclined to the fitting surface.

A hydrodynamic slide bearing (10, 10) supports a shaft (14, 14) that is mounted rotatably. The hydrodynamic slide bearing (10,10) comprises a plurality of bearing segments (12, 12) arranged next to one another in the rotation direction (22, 22). The segment surfaces together form a running surface (16, 16) for the shaft (14, 14). At least one bearing segment (12, 12) has a plurality of grooves (26, 26) disposed in its segment surface, and the grooves (26, 26) are orientated substantially transverse to the rotation direction (22, 22). The rear groove edges (261) in the rotation direction (22, 22) are orientated obliquely to their respective assigned radial plane (24, 24) and are undercut in relation to their respective assigned radial plane (24, 24). The front groove edges (262) in the rotation direction (22, 22) are not undercut and are orientated obliquely to their respective assigned radial plane (24, 24).

A bearing unit comprising rolling elements, housed in a radially inner mounting seat of a casing. The bearing unit includes a radially outer and stationary coated ring provided with a metal ring and a liner of elastomeric material integral with a radially outer surface of the metal ring, a radially inner ring, which is rotatable with respect to an axis of rotation (X), and a row of rolling elements interposed between the coated ring and the radially inner ring. The elastomeric material of the liner is a vulcanized thermoplastic material. The liner is co-molded onto the radially outer surface of the metal ring and may include a cylindrical body and at least two annular protuberances which fit inside corresponding anchoring grooves formed on the surface of the metal ring.

A ball joint assembly includes a ball including an outer surface and a recess in the outer surface, a cup including an inner surface and a protrusion on the inner surface, and a sensor programmed to detect friction between the cup and the ball from the protrusion engaging the recess.

Bearing 11 has base material 110 and coating layer 111. Base material 110 contains crank shaft 13 on an inner circumferential surface side. The inner circumferential surface of base material 110 is coated with coating layer 111. The inner circumferential surface side of base material 110 is coated with a resin with a thickness t, the resin is dried, and thereafter surface treatment is carried out such that multiple grooves C are provided on the surface of the resin so as to intersect with the direction of crank shaft 13, whereby coating layer 111 is formed. Peak portions B formed between adjacent grooves C come into contact with the outer circumferential surface of crank shaft 13 to support crank shaft 13. With bearing 11, the thickness of peak portions B at the center in the direction of the crank shaft 13 differs from the thickness of peak portions B at the end.

An apparatus includes a connecting rod having a surface that defines an opening to receive a pin for coupling the connecting rod to a piston at a first end of the connecting rod. The surface includes a groove arrangement to collect, retain and distribute lubrication fluid in the space between the pin and the inner surface. The surface can be formed by the connecting rod or a bushing in an opening of the connecting rod.

An engine bearing shell may include a concave bearing surface, opposed axial end faces with an axial width therebetween, circumferential joint faces, and an oil distribution groove circumferentially extending along the concave bearing surface towards the axial end faces. The oil distribution groove may have a groove width that is 4% to 9.25% of the axial width.

A half bearing includes circumferentially extending first and second grooves on the inner circumferential surface. The circumferential end of the first groove, on the rotational upstream side of the shaft, has an inclination angle 1 of 135 formed by: a first imaginary line connecting the inner circumferential surface end of a mating surface and the origin of an outer circumferential surface; and a second imaginary line connecting the end of the first groove and the origin of the outer circumferential surface. The circumferential end of the second groove, on the rotational upstream side of the shaft, has an inclination angle 2 of 135 formed by: a first imaginary line connecting the inner circumferential surface end of the mating surface and the origin of the inner circumferential surface; and a third imaginary line connecting the end of the second groove and the origin of the outer circumferential surface.