Nsk Corporation

Dai Kinno

Tsuyoshi Saito

Hirotoshi Aramaki

Atsushi Yokouchi

Yuji Shimomura

Taikou Nawamoto

Tomoyuki Aizawa

Yasushi Tomizuka

Shingo Higashi

Tsutomu Abe

Hiroyuki Ito

Toshikazu Yabe

Koji Ueda

Hiroshi Iwasa

Sumio Sugita

Satoshi Kadokawa

Chuichi Sato

Fumio Ueki

Toshimi Takajo

Shoji Noguchi

Koichi Hachiya

Hiroshi Narai

Shoji Horike

Takashi Nagato

Kenji Yakura

Yasuhiro Nomura

Yuichi Sumita

Tomohiro Motoda

Magozo Hamamoto

Tooru Shouda

Yukio Ooura

Masateru Kondo

Katsuhiro Ikezawa

Akitoshi Maeda

Sadayuki Tanaka

Hiroyuki Uchida

Takamasa Ohira

Akio Fujii

Naohiro Yoshida

Kazunobu Taketa

Seisuke Takeda

Haruo Kamijo

Toshiro Kawamura

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, an outer ring, and a plurality of rolling elementsdisposed rotatably between a raceway surfaceof the inner ringand a raceway surfaceof the outer ring. At least any one of the inner ring, the outer ring, and the rolling elementsis 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.

Rolling device

The present invention is to offer such a rolling bearing excellent in the corrosion resistance and suited to the environmental protection. This rolling bearing rotatably holds, via a retainer, a plurality of rolling elements between an inner ring having an inner ring raceway in an outer circumference and an outer ring having an outer ring raceway in an inner circumference, and is sealed with a seal or a shield member covered with a rubber, wherein a core metal of the seal or the shield member is a steel sheet that is covered with a film of 0.2 to 50 &#x3bc;m thickness, the film comprising a metal or an alloy having a smaller oxidation-reduction potential than that of iron, and that is formed with a film comprising an inorganic substance of lithium and silica as an uppermost layer.

Rolling bearing seal or shield member

A formed film is formed on the surface of a metal substrate made of an iron-based metal. Thereafter, the surface of the formed film is subjected to treatment for lessening surface roughness such as rolling. In this arrangement, a member which exhibits a sufficient seizing resistance even after being freed of formed film can be obtained.

Rolling sliding member, process for the production thereof and rolling sliding unit

A rolling bearing includes: an inner ring mounted on a shaft to be supported; an outer ring provided around an outer periphery of the inner ring; a plurality of rolling elements rolling while contacting with an inner peripheral face of the outer ring and an outer peripheral face of the inner ring at surfaces thereof; and a retainer supporting the rolling elements. A sliding resistance-reducing film is formed on at least one of a first group being an outer peripheral face of the retainer or the inner peripheral face of the outer ring and a second group being an inner peripheral face of the retainer or the outer peripheral face of the inner ring.

Rolling sliding member and rolling apparatus

A rolling apparatus has a surface-treated rolling member composed of a metallic rolling element and a metallic race element which have been used with a lubricant, in which the surface of at least one of the rolling element and the race element has a reaction product subsurface layer containing phosphorus and oxygen and having a thickness of from about 30 to 600 nm, where the reaction product subsurface layer has been produced by reaction between the metallic component of the rolling element or the race element and an organic phosphorus compound. The lubricant contains, as an extreme pressure component, an organic phosphorus compound; the lubricant contains the organic phosphorus compound at a concentration of 10 to 10,000 ppm in terms of phosphorus; and the lubricant is present between the metallic contact surfaces of the rolling member and the race element.

Rolling apparatus having surface-treated rolling member

A ball bearing in which the heat value in an inner ring is decreased and the heat value in an outer ring is brought closer to the heat value in the inner ring by making the radius of curvature for the inner ring groove larger, and defining the radius of curvature for the outer ring groove as 50.5% to 53.0% of the ball diameter. The arrangement of the present invention suppresses the heat value in the entire ball bearing and extends the bearing life at a reduced cost without using a large flow rate lubrication method or a preloading method such as constant preloading. In addition, a decrease in heat generation, seizing resistance and wear resistance can be attained further by optimizing a relation between the raceway groove and the ball diameter, by optimizing the number of balls, by controlling the ingredient composition for the material of the bearing ring, and by forming a hard deposition film on the surface of the raceway groove. Thus, according to the present invention, a ball bearing having a long life is provided even during high speed rotation at a dmn value of 2,000,000 or more.

Ball bearing

As a ball for ball bearing there is provided a ceramics-coated ball made of a steel having almost the same linear thermal expansion coefficient as that of the bearing ring of the ball bearing and coated with a ceramics material. In this arrangement, even when the temperature during bearing assembly and the working temperature differs from each other, the release of preload or excessive preload can be prevented as in ceramics ball because the bearing and the ball can expand or shrink in the same manner. Further, since the ball and the bearing ring contact with each other via the ceramics layer, fretting abrasion can be prevented, making it possible to obtain excellent running performance and acoustic properties.

Rolling bearing and bearing device

In a roller bearing, surface layers are formed on the inner surfaces of flanges which confront with the end faces of cylindrical rollers. The surface layers contain solid lubricant. The end faces of the cylindrical rollers are brought into slide contact with the surface layers. Hence, even when the roller bearing is insufficiently lubricated, the temperature rise is effectively suppressed, thus being free from the occurrence of seizure.

Roller bearing

A surface treatment layer for reducing friction is formed either on the outer peripheral surface of the shaft or on the inner peripheral surface of the roller opposed to the outer peripheral surface of the shaft with a small gap between them, wherein surface damages are prevented by the surface treatment layer from occurring on the outer peripheral surfaces immediately after the engine starts and before the engine oil is supplied.

Tappet roller bearing

A rolling bearing includes an outer raceway, an inner raceway, a plurality of rolling elements interposed between the outer raceway and the inner raceway, and a cage for holding the rolling elements away from each other at the same interval in a rolling direction of the rolling elements, the cage including a first layer subjected to a surface treatment of at least one of carbonitriding, phosphating, sulfonitriding and gas soft nitfriding, and a second layer formed of at least one of PTFE, MoS.sub.2, WS.sub.2, Ag and Sn when the first layer includes a treated surface subjected to the surface treatment of phosphating. The rolling bearing can stabilize the attitude of the rolling elements and retain the ease of grinding them. At the same time, the dynamic torque of the rolling elements can be minimized while insuring to prevent the rolling elements from falling away from the cage.

Thrust needle-shaped roller bearing, rolling bearing, and cage of the

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Kanagawa, Japan

Dai Kinno