An apparatus is provided that includes a diamond bearing surface positioned in sliding engagement with an opposing bearing surface of a diamond reactive material. The opposing bearing surface is hardened via a material treatment.

Aspects of the disclosure relate to processing sliding mechanisms. For instance, an assembly including a first component having a first sliding mechanism may be heated to a first minimum temperature for a first minimum period of time. Thereafter, a second component is pressed onto the assembly a first time such that the second component contacts the first sliding mechanism. Thereafter, the second component and the assembly may be subjected to a below-freezing temperature for a second minimum period of time. Thereafter, the second component may be separated from the assembly. The first sliding mechanism may be rotated relative to the first component. Thereafter, the second component may be pressed onto the assembly a second time such that the second component contacts the first sliding mechanism. Thereafter, the first component and the assembly may be heated to a second minimum temperature for a third minimum period of time.

A rolling bearing, a rolling device, and a method of manufacturing the rolling device are provided, by which a long life can readily be implemented by suppressing surface damage even on the use condition that the oil film formation performance of a rolling part is poor. A rolling device includes: a first rolling component made of SUJ2; and a second rolling component made of SUJ2 and configured to contact the first rolling component. A surface of a rolling part of the first rolling component is greater in arithmetic mean roughness than a surface of a rolling part of the second rolling component. The arithmetic mean roughness of the surface of the rolling part of the second rolling component is 0.07 μm or more and 0.20 μm or less.

Wheel hub assembly for motor vehicles, the group having a radially outer ring with at least one raceway, at least one radially inner ring with a related raceway and at least one ring of rolling bodies interposed between the radially outer ring and the radially inner ring, for sliding inside the raceways, at least one raceway being provided with superficial micropores having a depth (H) between 0.05 μm and 1.5 μm and defining respective micro-tanks for containing a lubricating grease.

A thrust roller bearing includes a plurality of radially arranged rollers, and a pair of annular washers having raceway surfaces on which the rollers roll. The raceway surfaces are arranged to face each other. The roller is made of high-carbon chromium bearing steel and has a surface roughness of 0.01 to 0.10 in terms of Rvk and 0.01 to 0.08 in terms of Rk. At least one of the washers is made of carbon steel, surface compressive residual stress of the raceway surface is −1400 MPa to −1000 MPa, and Vickers hardness of surface of the raceway surface is 850 to 900.

A thrust roller bearing includes a plurality of radially arranged rollers, and a pair of annular washers having raceway surfaces on which the rollers roll, the raceway surfaces being arranged to face each other. The roller is made of high-carbon chromium bearing steel, and contains 1.1 mass % to 1.6 mass % of carbon and 0.1 mass % to 0.6 mass % of nitrogen in a range of 0.1 mm from a surface. A surface compressive residual stress is smaller than −900 MPa, a surface roughness is 0.01 to 0.10 in terms of Rvk and 0.01 to 0.08 in terms of Rk, and a Vickers hardness of the surface is 860 to 980. At least one of the washers is made of carbon steel, and surface roughnesses of the raceway surfaces are 0.05 to 0.20 in terms of Rvk and 0.08 to 0.15 in terms of Rk.

In a tapered roller bearing, the surface roughness of at least a rolling surface and a large diameter-side end surface of a tapered roller is 0.02 to 0.17 μm in protruding mountain portion height Rpk, 0.12 to 0.21 μm in core portion level difference Rk, and 0.07 to 0.43 μm in protruding valley portion height Rvk and the average recessed portion area in the fine irregularities on the surface of the tapered roller is 5 μm.sup.2 or less. As a result, oil film formability can be improved under dilute lubrication and a decline in lubricating oil viscosity and surface damage at a rolling contact part and an increase in friction at a sliding contact part can be suppressed at the same time.

A rolling bearing includes an inner ring, an outer ring, and a plurality of balls interposed between the inner ring and the outer ring. The inner ring and the outer ring are made of stainless steel. A raceway surface with which the ball is in rolling-contact in each of the inner ring and the outer ring and is a superfinished surface and a coating layer made of a solid lubricating film is formed on the superfinished surface.

A tapered roller bearing includes an inner ring having a large flange surface, and tapered rollers having roller large end surfaces. The large flange surface has an arithmetic mean roughness Ra of 0.1 μm≤Ra≤0.2 μm. The large flange surface further has a roughness curve skewness Rsk of −1.0≤Rsk≤−0.3, and a roughness curve kurtosis Rku of 3.0≤Rsk≤5.0. The tapered roller bearing is capable of realizing both stable rotation torque while the bearing is rotating at a low speed, and excellent resistance.

A radial bearing assembly is provided. The radial bearing assembly includes polycrystalline diamond elements, each having an engagement surface in sliding engagement with an opposing engagement surface. The opposing engagement surface includes a diamond reactive material. The radial bearing assembly may be deployed in a variety of components and applications, including in rotor and stator assemblies. Also provided are methods of use of the radial bearing assembly, as well as methods of designing the radial bearing assembly.