Abstract: A ball bearing having external surfaces coated with ceramic materials is provided. The raceways of the ball bearing may advantageously be formed of metal such as stainless steel. The ceramic coating acts as an insulator increasing the resistance of the ball bearing to heat within the ball bearing environment. The balls within the raceway of the ball bearing may advantageously be coated with a lubricant to decrease friction in the ball bearing because the insulating ceramic coating prevents the environmental heat from causing the degradation of the lubricant.

Abstract: A bearing includes an inner bearing ring on which a raceway is formed. The ring includes at least a first component of light metal material and at least a second component of fully dense ceramic material, where the first component and the second component are separate entities joined together, and where the second component forms at least part of the raceway. The first component includes two lightweight metal parts interconnected by a screw thread which can be tightened to induce compressive pre-stress in the second component to compensate for low tensile strength of the ceramic material.

Abstract: A bearing for alternators and a bearing for pulleys for reducing hydrogen embrittlement or cracking is used when the bearing is in an environment having a severe condition, such as, when hydrogen is generated from grease or the like. The bearing includes a rolling element, an inner ring and an outer ring, and at least one of the rolling element, where the inner and outer rings have a nitrogen enriched layer containing austenite crystal grains having a grain size number exceeding 10.

Abstract: An outer ring, an inner ring and a ball that are a rolling contact member formed of sintered ? sialon inexpensive and capable of reliably ensuring sufficient durability, is constituted of a sintered body containing ? sialon as a main component and having a remainder formed of an impurity, and the outer ring, the inner ring and the ball have raceway/rolling contact surfaces, i.e., an outer ring raceway surface, an inner ring raceway surface and a ball rolling contact surface included in a portion having an outer ring high density layer, an inner ring high density layer and a ball high density layer higher in density than an inner portion.

Abstract: A bearing for alternators and a bearing for pulleys for reducing hydrogen embrittlement or cracking is used when the bearing is in an environment having a severe condition, such as, when hydrogen is generated from grease or the like. The bearing includes a rolling element, an inner ring and an outer ring, and at least one of the rolling element, where the inner and outer rings have a nitrogen enriched layer containing austenite crystal grains having a grain size number exceeding 10.

Abstract: A rolling bearing comprises a roller, a roller shaft provided inwardly of the roller, and rolling elements provided between the roller and the roller shaft, the roller shaft having a nitrogen-rich layer and is configured such that its race surface, on which the rolling elements run, has not smaller than 11 in the JIS austenite grain size number and not smaller than HV653 in the Vickers hardness number, at both ends not greater than HV300, and at its core beneath a widthwise midpoint of the race surface not smaller than HV550.

Abstract: A rolling bearing (10) having an outer ring (1), an inner ring (2), and a plurality of rolling elements, wherein at least one of the members, the outer ring (1), inner ring (2) and rolling elements (3), has a nitrogen rich layer and the grain size number of austenite crystal grains is in the range exceeding the number 10.

Abstract: A bearing device is provided with a bearing ring and a shaft body that is made of carbon steel including pearlite having a cementite layer structure, and has an end portion caulked onto the bearing ring, and in this device, at least in the end portion of the shaft body, the layer gap of the cementite in the pearlite is made greater.

Abstract: Diamond bearings and bearing components are disclosed. Some embodiments of the bearings and bearing components include polycrystalline diamond compacts sintered under high pressure and high temperature to create a diamond table chemically and mechanically bonded to a substrate, the diamond table presenting a durable and thermally stable load bearing and articulation surface.

Abstract: The invention relates to a radial roller bearing, having an outer bearing ring and an inner bearing ring, and rolling bodies located between the rings. Some of the rollers are formed by individual hollow rollers of a shape memory alloy. The cross-section of the shape memory alloy rollers is deformed during the assembly of the radial roller bearing to fit the dimensions of the free space between the rims of the rings. The rollers are introduced into the radial roller bearing through the free space between the rims of the bearing rings. After introduction into the radial roller bearing and once they have reached a specific temperature, the rollers independently regain their original shape.

Abstract: A rolling device in which rust development or damage on a raceway surface or rolling surface is hard to occur even if water and the like intrude is provided. A self-aligning roller bearing comprises an inner ring 1, an outer ring 2, and a plurality of rolling elements 3 disposed rotatably between a raceway surface 1a of the inner ring 1 and a raceway surface 2a of the outer ring 2. At least any one of the inner ring 1, the outer ring 2, and the rolling elements 3 is provided with a metal coating formed by shot peening of a powder of metal less noble than iron at least on a part of its surface.

Abstract: A deep-grooved ball bearing including a rolling contact member formed of a sintered ?-sialon inexpensive and capable of reliably ensuring sufficient durability includes an outer ring and an inner ring, and a plurality of balls arranged in contact with the outer ring and the inner ring on an annular raceway. The ball is configured of a sintered body that contains as a main component a ?-sialon represented by a compositional formula of Si6-ZAlZOZN8-Z and satisfying 0.1?z?3.5 and has a remainder formed of an impurity.

Abstract: The anti-friction bearing has an outer bearing ring, an inner bearing ring and rolling bodies that are located between the bearing rings. The race of the outer bearing ring and the inner bearing ring are laterally delimited by two continuous rims that are formed as one piece with the races. The bearing is filled with the rolling bodies through the free space between the two rims. A partial quantity of the rolling bodies is made of a shape memory alloy, the cross-section of the bodies being deformed to fit the dimensions of the free space between the rims. After introduction into the bearing and once they have reached a specific temperature, the bodies regain their original shape.

Abstract: In order to ensure high levels of insulation performance, and low cost, and have an excellent external appearance, as a ceramic constituting an insulating coating 6 being a ceramic coating layer, one with alumina as its main component, and in which the content of titanium oxide is limited to 0.01 to 0.2 percent by weight is used. Moreover, a particle size of ceramic forming the coating layer is 10 to 50 ?m, and average particle size is 15 to 25 ?m. By limiting the content of titanium oxide, the insulating coating 6 can be made thin, and by limiting the particle size the film thickness accuracy can be improved, thus simplifying finishing. Moreover, by mixing of titanium oxide, deterioration of the external appearance after sealing can be prevented. As a result, the above problem is solved.

Abstract: The rotating anode x-ray tube has a composite outer bearing made from two rings of a high hot-hardness material and a spacer between the two rings made of a constant coefficient of thermal expansion material. The spacer is welded to the two rings providing the composite outer bearing. One inner bearing race is formed from the shaft and the other inner bearing race is a one-piece inner race mounted on the shaft while the two rings have the corresponding outer races.

Abstract: A rolling bearing that attains long life against surface damage such as surface-originating separation or internally originating separation and allows caulking of its shaft end face, a cam-follower with roller employing the rolling bearing, and a cam are obtained. The rolling bearing includes an outer-roller, a roller shaft located inside the outer-roller, and a rolling element interposed between the outer-roller and the roller shaft. At least one member of the outer-roller and the roller shaft has a nitrogen enriched layer. A surface portion of an area in a rolling contact surface where the rolling element rolls has austenite grain size of No. 11 or larger. The end portion has hardness of not larger than HV300.

Abstract: An outer ring and an inner ring of a rolling bearing are constituted of steel containing 0.77 to 0.85% of carbon, 0.01 to 0.25% of silicon, 0.01 to 0.35% of manganese, 0.01 to 0.15% of nickel, 3.75 to 4.25% of chromium, 4 to 4.5% of molybdenum and 0.9 to 1.1% of vanadium with the rest consisting of iron and impurities, a nitrogen-enriched layer having a nitrogen concentration of at least 0.05 mass % is formed on a region including a rolling surface, and the total of a carbon concentration and the nitrogen concentration in the nitrogen-enriched layer is at least 0.82 mass % and not more than 1.9 mass %. A DLC coating layer is arranged on a region including an outer ring contact surface.

Abstract: A sliding member includes a silicon nitride sintered compact containing a rare earth element of 7 to 18 mass % in terms of oxide and at least one element M selected from Ti, Zr, Hf, V, Nb, Ta, Cr, Mo and W of 0.1 to 3 mass % in terms of oxide, and having a total content of impurity positive ion elements of 0.3 mass % or less and a thermal conductivity of 60 W/m·K or higher. The silicon nitride sintered compact includes silicon nitride crystal grains and a grain boundary phase, and has a ratio of crystalline compound phases in the grain boundary phase of 20% or more in area ratio, and an average grain size of the crystalline compound phases of 0.5 ?m or less. The sliding member is used, for example, as a bearing ball 2.

Abstract: A compressor component incorporated into a compressor having a compressor body and a compressor pulley mechanism transmitting a driving force to the compressor body has an austenite grain with a grain size number falling within a range exceeding 10, a fracture stress value of at least 2650 MPa, or a hydrogen content of at most 0.5 ppm. This provides a compressor component and a compressor bearing with a long fatigue life, a high anti-crack strength, and a reduced secular dimensional variation.

Abstract: A resin snap cage 4 comprises a resin-made circular main part 10, a plurality of pockets 11 provided in one axial end face of the circular main part 10, and a circular reinforcing member 12 installed concentrically at the other end face in an axial direction of the circular main part 10. While this reinforcing member 12 is circular along the circular main part 10, a sectional shape in a plane parallel to an axial direction is a rectangle. The reinforcing member 12 is embedded in a recessed portion formed at the other end face in an axial direction of the circular main part 10 to be integrated, an outside diameter surface 12a, an inside diameter surface 12b, and a pocket-side surface 12c of the reinforcing member 12 are covered with the circular main part 10, and a surface 12d thereof opposite to the pocket side is exposed.

Abstract: A bearing assembly for radial and axial support of a shaft part relative to a housing includes two radial antifriction bearings located at an axial distance to one another on the shaft part and two axial antifriction bearings located at an axial distance to one another on the shaft part. To create better support, the bearing assembly has an outer bearing ring which is inserted into a hole of the housing and which, made as a one-piece component, has tracks for the two radial antifriction bearings and for the two axial antifriction bearings.

Abstract: A thermally stable tribological coating is applied to the outer surface of a moveable bearing outer ring in a bearing assembly for an x-ray tube rotating anode and/or the surface of a housing bore of the X-ray tube rotating anode which receives the bearing assembly. If the tribological coating is applied to the outer surface of the bearing outer ring, it is made of a material that is metallurgically incompatible with the material from which the housing containing the bearing is made. The coating includes one or more of the following: Cr, W, Mo, or Nb, or nitrides, carbides, oxides, or sulfides of Cr, W, Mo, or Nb.

Abstract: An inner race or and outer race, including: a first annular portion with a first radial surface at a first end of the race; and a second annular portion formed from a same piece of material as the first portion, at least partially in contact with the first portion, the second portion having a second radial surface at the first end of the race, the second radial surface separate from the first radial surface at the first end of the race. In one embodiment, the first and second radial surfaces are substantially orthogonal to a longitudinal axis for the race. The inner race includes a third annular portion disposed at a second end of the race, opposite the first end, and formed from the same piece of material. The first and second annular portions extend from the third annular portion to the first end of the race.

Abstract: Arrangements may include a bearing assembly, the bearing assembly having a bearing housing ring, the housing ring having an inner bore, at least a portion of the inner bore including a dry lubricant coating; a bearing, the bearing including: an outer race, the outer race having an outer surface received within the inner bore of the housing ring, at least a portion of the outer surface including a chromate anti-corrosive coating; and an inner race, the inner race having an inner race bore, and outer surface, and two radial end surfaces each extending between the inner race bore and the outer surface, at least a portion of the inner race bore, outer surface, and radial end surfaces include the chromate coating disposed thereon. Associated methods and arrangements are also described.

Abstract: To provide an improved rolling bearing assembly having an improved resistance to electric corrosion, which can provide a proper performance and can be assembled at a reduced cost, the rolling bearing assembly includes an inner race (1), an outer race (2) and a circumferential of rolling elements (3) rollingly interposed between the inner and outer races (1) and (2). An electrically insulating layer (4) is formed on a surface of one of the inner and outer races (1) and (2), which is held in contact with a housing or a shaft when the rolling bearing assembly is mounted. This electrically insulating layer (4) is made of a gray alumina containing Al2O3 mixed with TiO2 in a quantity chosen to be equal to or smaller than 1 wt % relative to the total weight of the gray alumina.

Abstract: Diamond bearings and bearing components are disclosed. Some embodiments of the bearings and bearing components include polycrystalline diamond compacts sintered under high pressure and high temperature to create a diamond table chemically and mechanically bonded to a substrate, the diamond table presenting a durable and thermally stable load bearing and articulation surface.

Abstract: An improved swashplate assembly of the main rotor of an AH-64 Apache helicopter includes a stationary swashplate and a rotating swashplate and a ball bearing between the swashplates, the ball bearing having an outer ring, an inner ring, two sets of balls between the inner ring and the outer ring, and a wire loop cage between the inner ring and the outer ring. The improvement includes that the inner ring, the outer ring and the balls are formed from an M50 alloy.

Abstract: The present invention provides a rolling bearing excellent in insulating property and resistance to corrosion and chemicals such as acids, alkalis, and the like by forming a dense ceramic layer by using a method instead of a thermally spraying method. The rolling bearing includes an inner ring 1, an outer ring 2, and a plurality of rolling elements 4 provided between a raceway surface of the inner ring 1 and that of the outer ring 2 and has a ceramic film 7 formed on at least one surface selected from among an inner peripheral surface of the inner ring 1 and a peripheral surface of the outer ring 2. The ceramic film 7 is formed by using an aerosol deposition method in which alumina fine particles or the like is used as a material of aerosol. The ceramic film 7 is formed with an aerosol injection nozzle kept stationary and the inner ring or the outer ring being rotated by using a motor for rotating an object, the inner ring 1 or the outer ring 2 is moved axially by using a positioning XY table.

Abstract: The present invention is a bearing assembly for a support frame and shaft with a shoulder. The bearing assembly includes balls. There is an outer race frame with a race to receive balls. The outer race frame is adapted to be mounted to the support frame. There is an inner race frame with a race to receive the balls. The inner race frame is adapted to be mounted to a shaft with a shoulder. The inner race frame and the outer race frame connect together to encase the balls. The inner race frame and the outer race frame together form an outside diameter measurement value and inside diameter measurement value of the bearing assembly. The inner race includes a shoulder surface contact area to be in contact with the shoulder which is at least ninety-five percent of thickness area of the bearing assembly.

Abstract: A rolling element including a base metal, and a nickel coat formed on a surface of the base metal and cooperating with the base metal to constitute a rolling contact surface satisfying condition that a mean value of ratios of L1 to L2 as measured in at least three optional observation areas is in a range of from 1.2 to 2.4, where each observation area is disposed in a cross section taken in a vertical direction relative to the surface of the base metal and is defined by two parallel vertical lines; lengths L1 and L2 respectively represent a length of an interface between the base metal and the nickel coat, and a length of a reference line segment extending perpendicular to the vertical direction, in same observation area.

Abstract: Diamond bearings and bearing components are disclosed. Some embodiments of the bearings and bearing components include polycrystalline diamond compacts sintered under high pressure and high temperature to create a diamond table chemically and mechanically bonded to a substrate, the diamond table presenting a durable and thermally stable load bearing and articulation surface.

Abstract: The invention relates to a bearing for a wind turbine comprising bearing rings with raceways, and at least one row of bearing balls or rollers positioned between said raceways. At least one of said raceways comprises one or more indentation areas in relation to a standard shape of the raceways. The invention also relates to a wind turbine and methods for manufacturing a bearing.

Abstract: A bearing (1) for the shaft of a turbocharger, which includes two ball bearings spaced apart from each other in the axial direction under axial biasing is provided, wherein the ball bearings are enclosed concentrically by a bearing carrier (4) on the outer periphery and are held at an axial distance by a spacing ring, that is distinguished in that the spacing ring is formed by a lengthened inner ring (7) of one of the two ball bearings (2), both ball bearings (2, 3) belong to different categories, and one of the two ball bearings (2) is charged with axial biasing by a spring element (18).

Abstract: The inventive rolling mechanism brings into play two pieces (1, ST) that rotate relative to one another with the interposition of rolling elements (5) supporting on raceways (4a, S2) facing the two pieces (1, ST) with a bearing that is exerted on respective contact surfaces of said raceways (4a, S2) and said rolling elements (5). At least one of the contact surfaces (S2) carries a layer (C) made of a material that is harder and more resistant than the underlying substrate that supports it.

Abstract: A bearing part comprising steel subjected to carbonitriding at a carbonitriding temperature exceeding the A1 transformation temperature, and cooled to a temperature lower than the A1 transformation temperature. The steel is reheated to a temperature for quenching that is not lower than the A1 transformation temperature but lower than the carbonitriding temperature, and then quenched.

Abstract: A rolling bearing includes: outer and inner rings, at lease one of which is made of a ceramics; a plurality of rolling elements interposed between the outer and inner rings; a seal groove, a sectional shape in an axial direction of which is formed by substantially a partial circular arc, and which is formed on a shoulder portion of a raceway of one of the outer and inner rings; and a resin seal member including a peripheral edge portion fitted to the seal groove.

Abstract: In the ball bearing, in a space surrounded by an inner ring, an outer ring and sealing portions, adsorbing material coatings formed on outer periphery surfaces of the inner ring, adsorbing material coatings formed on inner periphery surfaces of the outer ring, and adsorbing material coatings formed on inside surfaces of the sealing portions and adsorbing material coatings formed on a non-holding surface of the cage are disposed. The adsorption material coatings may adsorb the wear powder generated from the inner ring, the outer ring, the ball, the cage and the sealing portions and the outgas due to vaporization of the lubricant oil.

Abstract: In a first rolling bearing of this X-ray tube apparatus, an ion nitriding layer is formed on a raceway surface of an inner ring, and an ion nitriding layer is formed on a raceway surface of an outer ring. As the results, surface hardness of the raceway surface of the inner ring and the raceway surface of the outer ring is enhanced, and abrasion resistance can be improved. On the other hand, in a second rolling bearing, an ion nitriding layer and a diamond-like carbon film are successively formed on a raceway surface of an inner ring, and an ion nitriding layer and a diamond-like carbon film are successively formed on a raceway surface of an outer ring. As the results, the second rolling bearing which is positioned closer to the target has a double hardening structure.

Abstract: A vacuum pump includes a high-speed rotor, and an anti-friction bearing for rotatably supporting the rotor and including an inner ring, an outer ring, a rolling body, and a cage for the rolling body both the rolling body and the cage being located in an intermediate space defined by the outer and inner rings, with the cage having a threaded groove in a section of its surface adjacent to the inner ring for insuring a continuous feeding of a lubricant to the bearing.

Abstract: A low friction sliding combination of a cam and a cam follower which are in slidable contact with each other in presence of a lubricating oil. The cam follower includes a cylindrical and hollow outer roller having an outer peripheral surface in slidable contact with the cam. A fixed pin is coaxially disposed inside the outer roller and rotatably movable relative to the outer roller. A diamond-like carbon material is coated on a sliding surface of at least one of the outer roller and the fixed pin. The lubricating oil contains at least one of ashless fatty acid ester friction modifier and ashless aliphatic amine friction modifier.

Abstract: A bearing includes: an outside portion; an inside portion which is rotatably assembled to the outside portion; a rotating body arranged in a space formed when the outside portion and the inside portion are assembled; a first sealing portion which is integrally molded with the outside portion and seals the space by abutting against the inside portion through elastic deformation caused when assembled; and a second sealing portion which is integrally molded with the inside portion and seals the space by abutting against the outside portion through elastic deformation caused when assembled.

Abstract: The invention relates to an antifriction bearing race, particularly for highly stressed antifriction bearings in aircraft power units, which are comprised of a fixed joining of two layers made of different metallic materials, the area of the raceway for the roller bodies being made of a steel with a very high degree of hardness and resistance to wear, and the core area of the antifriction bearing race being made of a high-strength steel. According to the invention, a powder-metallurgical high-speed steel having a high content of carbide-forming alloying elements and a high carbon content is provided as the material for the raceway of the roller bodies, whereas the material for the core area of the antifriction bearing race is made of a hot-work steel with, in comparison to the raceway material, a lower content of carbide-forming alloying elements and with a low carbon content, both materials being joined to one another with material fit by diffusion welding.

Abstract: A pump for carrying supercritical CO2 fluid or liquid CO2 capable of securing reliability by optimizing a bearing part. An angular ball bearing (8) comprises an inner ring (8a), an outer ring (8b), balls (8c) held therebetween, and a cage (8d) holding the balls (8c). Both the balls and the inner and outer rings are formed of a ceramic to form a totally ceramic bearing. Also, the cage (8d) is guided by the outer ring or the inner ring. Specifically, for example, when the cage is guided by the inner ring, the inner peripheral surface (8db) of the cage (8d) opposed to the outermost peripheral surface (8ab) of the inner ring (8a) is guided by the outermost peripheral surface (8ab) of the inner ring (8a).

Abstract: At least on a surface of a rolling element of a rolling bearing, innumerable minute concave recesses are randomly formed. An average area of the recesses is in a range of 30 to 100 ?m2, and Rymax is in a range of 0.4 to 1.0.

Abstract: A thrust needle roller bearing has a washer formed of a thin steel plate and needle rollers, at least said washer has a nitrogen enriched layer at a surface layer portion, amount of retained austenite in said surface layer portion is at least 5 volume % and at most 25 volume %, and austenite grain number of said surface layer portion is 11 or higher. Thus, a long life thrust needle roller bearing resistant to an early failure caused by surface damage such as surface-originated flaking and also resistant to common, load dependent rolling contact fatigue can be provided.

Abstract: A structure supporting a differential rotatably includes an inner ring arranged at the differential, an outer ring arranged at an external peripheral portion formed to surround the differential, and a tapered roller rolling between the inner ring and the outer ring. At least any one of the inner ring, the outer ring and the tapered roller has a carbo-nitrided layer and provides an austenite grain number falling within a range exceeding 10. Thus the structure can be provided with increased anti-crack strength and dimensional stability, and increased rolling contact fatigue life.

Abstract: A rolling element bearing comprises an inner ring and an outer ring which are each provided with a raceway, and a series of rolling elements which are in contact with the raceways of each ring. A lubricant film is provided in the contacts between the rolling elements and the raceways, which film forms a lubricant meniscus at the inlet side of each contact. In the bearing starved lubrication conditions prevail. The surface of each rolling element has minute recesses filled with a lubricant quantity, said recesses being flattened in the contact area defined by the contact between the rolling elements and the rings and thereby releasing lubricant at the inlet side of each contact resulting in a displacement of the meniscus further away from said contact. This meniscus displacement results in an increased lubricant film thickness in each contact area, thus improving the lubricating conditions in the bearing.

Abstract: The present invention is directed to bearings produced from a silicon nitride material. The silicon nitride material consists of a sintering aid selected from the group consisting of Al2O3 and Y2O3, silicon dioxide, and optionally, up to 10 mole %, based on the amount of silicon nitride, of an additive that reacts with silicon nitride, said additive selected from the group consisting of TiO2, WO3, MoO3 and mixtures thereof.

Abstract: There is provided a rolling component formed of a steel material of the medium carbon steel level that provides a rolling life improved to be comparable to that of bearing steel and also provides improved characteristic against surface-cracking, and a power transmission component including the rolling component. To achieve this, the rolling component is formed of steel having an induction hardened portion having a stress intensity factor range associated with tension associated-fatigue crack extension that has a lower limit ?Kth of 6.2 Mpa?m.

Abstract: A method for reducing the presence of ferritic particles in lubricant employed in the lubrication of rotary shaft bearing of the type that include a first bearing contact surface, a second bearing contact surface and a plurality of rotatable bearing members disposed therebetween, a lubrication system employing such method and a lubricated assembly. The method includes providing a ferritic particle collector element of magnetised material in close proximity to the bearing and a path of lubricant flowing to the bearing. The close proximity being within a distance from the bearing contact surface which is less than five times the maximum diameter of the bearing contact surfaces. The collecting element may be an existing component of a lubrication system or lubricated assembly which is rendered magnetic or may be a magnet or magnets secured to an existing component.