Nsk Corporation

Other

Nippon Oil Company

Kyodo Yushi Co., Ltd.

Nippon Seiko Kabushiki Kaisha

Michiharu Naka

Atsushi Yokouchi

Hideki Koizumi

Kenichi Iso

Masao Yamamoto

Emiko Shiraishi

Yasunobu Fujita

Youichiro Sugimori

Masaaki Sekine

Katsuyoshi Yamashita

Jun Kuraishi

Akira Suzuki

Toshikazu Yabe

Hiroyuki Ito

Hiroshi Kimura

Toshiaki Endo

Hirotugu Kinoshita

Atsushi Shibayama

Yasuhisa Terada

Koichi Hachiya

Katsuaki Denpo

Kouichi Hachiya

Masahiro Takahashi

Takashi Ogawa

Mamoru Aoki

Masaru Mishima

Yoichi Suzuki

Magozou Hamamoto

Jiami Pu

Kazuo Akagami

Tooru Shouda

Masahiko Yamazaki

Atushi Yokouchi

Yuzo Takahashi

Hisao Sumiya

Takahiko Uchiyama

Toshimi Takajo

Toru Takamizawa

Yasushi Mutoh

Yuji Onuki

Souichi Nomura

Atsuhiro Yamamoto

Hiroshi Ishiwada

Fumihiro Itano

Kenji Takei

Yujiro Toda

Shigeki Maehara

Hirotoshi Miyajima

Katsuaki Denpou

Yasuyuki Matsumoto

Toru Syoda

Akimi Kimura

Yukari Kondoh

Mokoto Seikiya

Koici Goto

Takayuki Yatabe

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 disclosed, wherein a metallic soap-base thickener containing a long-fiber material having a major axis part length of at least 3 &#x3bc;m is blended with a base oil obtained by mixing a lubricating oil having a polar group within the molecule structure and a non-polar lubricating oil, which can improve the initial sound (cage sound) of bearing at the starting of operation in a low-temperature environment and is effective on the reduction of fretting damage (abrasion) or torque, and also a rolling bearing and a linear acting apparatus each obtained by packing the grease composition are disclosed, which exhibit excellent low-temperature acoustic property and are reduced in the fretting damage (abrasion) or torque.

Lubricating grease composition and rolling apparatus

A rolling bearing lubricated with a grease includes an outer ring, an inner ring, a plurality of rolling elements disposed between respective rolling raceway tracks of the outer ring and the inner ring, and a retainer having a plurality of pockets for locking the rolling elements to freely roll and formed of resin material. In the rolling bearing, the radial clearance gap ratio of the pockets of the retainer is set to 0&#x2266;&#x3b4;r/Da&#x2266;0.09, and the axial clearance gap ratio of the pockets is set to 0&#x2266;&#x3b4;a/Da&#x2266;0.06 when the kinematic viscosity of base oil at 40&#xb0; C. of the grease is 10 to 40 mm/sec, being set to 0&#x2266;&#x3b4;a/Da&#x2266;0.05 when the kinematic viscosity of base oil is 10 to 90 mm/sec, being set to 0&#x2266;&#x3b4;a/Da&#x2266;0.025 when the kinematic viscosity of base oil is 10 to 160 mm/sec.

Rolling bearing and fan motor using the same

In a lubricant application system, a prescribed volume of lubricant is transferred from a lubricant discharge portof a prescribed liquid volume discharge device to a rolling elementof a rolling bearingin a state in which the lubricant discharge portis positioned directly above and sufficiently close to the rolling element, whereby the lubricant is applied to the interior of the rolling bearing. Further, the application system inspects whether or not a prescribed volume of lubricant is injected from the discharge device for injecting a lubricant into the interior of a rolling bearing. A laser beam Lis irradiated between a lubricant discharge portof the lubricant discharge device and the rolling bearing, and a reflected laser beam Lreflected by the lubricant when it is discharged from the lubricant discharge portis received by a photoreceptordisposed on the optical axis of the reflected laser beam L, whereby whether or not the lubricant is applied to the rolling bearingis determined based on an output from the photoreceptor

Lubricant applying system for a rolling bearing

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 prescribed volume of lubricant is transferred from a lubricant discharge port of a liquid volume discharge device to a rolling element of a rolling bearing when the lubricant discharge port is positioned directly above and close to the rolling element , whereby the lubricant is applied to the interior of the rolling bearing . Further the application system inspects whether or not a prescribed volume of lubricant is injected from the discharge device for injecting a lubricant into the interior of a rolling bearing

In a lubricant application system, a prescribed volume of lubricant is transferred from a lubricant discharge port of a prescribed liquid volume discharge device to a rolling element of a rolling bearing in a state in which the lubricant discharge port is positioned directly above and sufficiently close to the rolling element whereby the lubricant is applied to the interior of the rolling bearing Further, the application system inspects whether or not a prescribed volume of lubricant is injected from the discharge device for injecting a lubricant into the interior of a rolling bearing

In a lubricant application system, a prescribed volume of lubricant is transferred from a lubricant discharge port ( ) of a prescribed liquid volume discharge device to a rolling element ( ) of a rolling bearing ( ) in a state in which the lubricant discharge port ( ) is positioned directly above and sufficiently close to the rolling element ( ), whereby the lubricant is applied to the interior of the rolling bearing ( ). Further, the application system inspects whether or not a prescribed volume of lubricant is injected from the discharge device for injecting a lubricant into the interior of a rolling bearing ( ). A laser beam (L ) is irradiated between a lubricant discharge port ( ) of the lubricant discharge device and the rolling bearing ( ), and a reflected laser beam (L ) reflected by the lubricant when it is discharged from the lubricant discharge port ( ) is received by a photoreceptor ( ) disposed on the optical axis of the reflected laser beam (L ), whereby whether or not the lubricant is applied to the rolling bearing ( ) is determined-based on an output from the photoreceptor ( ).

The present invention is to provide a rolling bearing suitable for the use under a high temperature, high speed, high load and high vibration condition, having a good rust-preventive performance and the excellent flaking life without a hazard to a human body. A rolling bearing is described, comprising an inner race, an outer race and rolling elements, with a grease composition comprising, as the main components, a base oil, a thickener and at least one kind of a rust-preventive additive made from a naphthenate or a succinic acid derivative, packed in a bearing space formed by at least the inner race, the outer race and the rolling elements, said at least one kind of a rust-preventive additive is present in an amount of 0.1 to 10% by weight based on the total amount of the grease composition.

Rolling bearing

This invention is to provide a conductive grease which is less to decrease conductivity as a time passes. The conductive grease comprises a base oil, a thickener, a conductive solid powder, and at least one kind of a wear inhibitor, an extreme pressure agent and an oiliness agent, wherein an amount of the conductive solid powder added is 0.1 to 10 wt %, and an amount of the at least one kind of a wear inhibitor, an extreme pressure agent and an oiliness agent added is 0.1 to 10 wt %. Further, the conductive grease comprises the base oil and at least one of conductive additives, and the conductive additives are fibrous carbon, metallic particle, metallic compound particle and carbon nano-tube. The conductive grease to be packed into the rolling bearing comprises conductive fine particles such as carbon black and has an oil separation degree of 2% or lower. A ball bearing to be favorably used at high temperature comprises an inner race and an outer race, and a plurality of balls freely rotating between both races, and the conductive grease packed into a space defined between both races and holding the plural balls therein, and the conductive grease comprises the base oil, a thickener comprising fluorine compound or silicone compound and 0.2 to 10 wt % of the carbon black.

Conductive grease and rolling apparatus packed with the same

A ball bearing is described, which comprises an outer ring having on its inner periphery an outer raceway, an inner ring having on its outer periphery an inner raceway, plural balls rotatably disposed between the outer raceway and the inner raceway, a cage holding the plural balls in a freely rotatable manner, and a grease packed in a space between the outer raceway and the inner raceway, wherein the inner peripheral surface of each pocket of the cage contains a spherical part consisting of a spherical concave surface whose radius of curvature is slightly larger than that of each ball and a curved part which has the radius of curvature being larger than that of the spherical part and is smoothly continuous from the end of the spherical part toward the end thereof on the opening side of the pocket.

Ball bearing

This invention is to provide a conductive grease which is less to decrease conductivity as a time passes. The conductive grease comprises abase oil, a thickener, a conductive solid powder, and at least one kind of a wear inhibitor, an extreme pressure agent and an oiliness agent, wherein an amount of the conductive solid powder added is 0.1 to 10 wt %, and an amount of the at least one kind of a wear inhibitor, an extreme pressure agent and an oiliness agent added is 0.1 to 10 wt %. Further, the conductive grease comprises the base oil and at least one of conductive additives, and the conductive additives are fibrous carbon, metallic particle, metallic compound particle and carbon nano-tube. The conductive grease to be packed into the rolling bearing comprises conductive fine particles such as carbon black and has an oil separation degree of 2% or lower. A ball bearing to be favorably used at high temperature comprises an inner race and an outer race, and a plurality of balls freely rotating between both races, and the conductive grease packed into a space defined between both races and holding the plural balls therein, and the conductive grease comprises the base oil, a thickener comprising fluorine compound or silicone compound and 0.2 to 10 wt % of the carbon black.

A rolling bearing is described, which comprises an inner ring fitted onto a shaft, an outer ring fitted in the housing, a plurality of rolling elements provided interposed between the inner ring and the outer ring and a lubricant packed thereinside and which is mounted between the shaft and the housing, wherein a rust preventive film comprising an oil-repellent material is formed on at least the outer surface of the outer ring and the inner surface of the inner ring, and a bearing apparatus is also described.

Rolling bearing and bearing apparatus

Growing community of inventors

Kanagawa, Japan

Michiharu Naka