Nsk Corporation

Other

Kyodo Yushi Co., Ltd.

Yasunobu Fujita

Michiharu Naka

Atsushi Yokouchi

Toshikazu Yabe

Emiko Shiraishi

Hiroshi Kimura

Masao Yamamoto

Jun Kuraishi

Kouichi Hachiya

Atsushi Shibayama

Youichiro Sugimori

Hirotoshi Miyajima

Kenichi Iso

Toru Takamizawa

Yuji Onuki

Koichi Hachiya

Shinya Nakatani

Yujiro Toda

Michita Hokao

Masahiko Yamazaki

Katsuaki Denpou

Akimi Kimura

A grease composition for rolling bearing comprising a metal soap-based thickening agent containing a long fiber-like material having a major axis length of at least 3 &#x3bc;m incorporated in a base oil comprising a lubricant having a polar group in its molecular structure and a non-polar lubricant blended in combination.

Grease composition for rolling bearing

The rolling bearing of the invention to be incorporated in the compressor for fuel cell system comprises a fluorine-based grease containing a fluororesin and a fluorine-based oil, a urea grease containing a urea compound and a synthetic oil or a lithium complex grease containing a lithium complex and a synthetic oil encapsulated therein. In this arrangement, the grease deterioration of the rolling bearing incorporated in the compressor for force-feeding various fluids between machines can be prevented, making it possible to provide a fuel cell system which can maintain stable operation over an extended period of time.

Rolling bearing, rolling bearing for fuel cell, compressor for fuel cell system and fuel cell system

A rolling bearing includes a plurality of rolling elements movably retained at almost the same interval between an inner ring and an outer ring with a cage made of synthetic resin provided interposed therebetween. The rolling bearing further includes, an oil film made of a lubricant, and a grease containing a synthetic oil as a base oil enclosed therein. The lubricant contains at least one additive selected from the group consisting of organic aliphatic acid, organic aliphatic acid derivative and organic phosphorus compound incorporated in a synthetic oil in a proportion of from 0.5 to 10% by weight formed on the surface of the raceways of the inner and outer rings and the surface of the rolling elements, and a grease containing a synthetic oil as a base oil enclosed therein.

Rolling Bearing

A grease composition is produced by mixing a thickener comprising a fluoro resin and a second thickener component (a metallic soap, a complex metallic soap, an N-substituted terephthalamic acid metal salt, organic bentonite or a calcium sulfonate complex) into a base oil. This grease composition is excellent in heat resistance, load carring capacity, water resistance, rust protection, lubricating life and the like. A rolling apparatus filled with the above grease composition has excellent lubricating ability and is long-lived under high-temperature conditions. Moreover, a grease composition is produced by mixing a thickener comprising a fluoro resin and carbon black as a second thickener component into a base oil. This grease composition is excellent in heat resistance, water resistance, rust protection, lubricating life, electric conductivity and the like. A rolling apparatus filled with the above grease composition has excellent electric conductivity and is long-lived under high-temperature conditions.

Grease composition and rolling apparatus

A rolling bearing for an HDD being excellent in the resistance to fretting wear, capable of lowering the torque and relieving the torque change and having a long life while exerting no undesirable effect on various bearing properties. A rolling bearing for hard disk drives wherein a cagesupports a plural number of rolling elementslocated between an inner ringand an outer ringand sealing membersfixed to the both ends in the axial direction of one of said inner ringand said outer ringare opposite to each other, wherein a lubricating oil has been injected into the bearing space formed between said sealing membersat the both ends in the axial direction so as to amount to 1 to 50% by volume of the bearing space.

Rolling bearing for hard disk drive

A grease composition for rolling bearing comprising a metal soap-based thickening agent containing a long fiber-like material having a major axis length of at least 3 &mgr;m incorporated in a base oil comprising a lubricant having a polar group in its molecular structure and a non-polar lubricant blended in combination.

A lubricating grease composition having a basic grease composition containing a synthetic oil as a base oil, and a lithium soap as a thickener. 0.5 to 10% by weight with respect to the basic grease composition total amount of at least one additive selected from the group consisting of an organic molybdenum compound, an organic fatty acid compound or an derivative thereof, and an organic phosphorus compound is added is provided. Accordingly, the present invention can provide a lubricating grease composition capable of providing excellent lubricating characteristics, fretting wear resistance property, and impact resistance property.

Lubricating grease composition and rolling apparatus comprising same

A rolling bearing for an HDD being excellent in the resistance to fretting wear, capable of lowering the torque and relieving the torque change and having a long life while exerting no undesirable effect on various bearing properties. A rolling bearing for hard disk drives wherein a cage supports a plural number of rolling elements located between an inner ring and an outer ring and sealing members fixed to the both ends in the axial direction of one of said inner ring and said outer ring are opposite to each other, wherein a lubricating oil has been injected into the bearing space formed between said sealing members at the both ends in the axial direction so as to amount to 1 to 50% by volume of the bearing space.

Growing community of inventors

Kanagawa, Japan

Yasunobu Fujita