Ntn Corporation

Nok Klueber Co., Ltd.

Nok Kluber Co., Ltd.

Jiro Yurimoto

Akihiko Shimura

Tetsuhiro Miyamoto

Toshio Nitta

Atsushi Morooka

Chikara Katagiri

Tetsuhiro Kitahara

Hidenori Wakamatsu

Kenichiro Naito

Yasumichi Kido

You Doi

A lubricant composition which is suitable as a fluorine oil, fluorine grease, and which is excellent in stabilizability, as well as a lubricant composition which is suitable as a fluorine oil, fluorine grease, and which has excellent rust prevention properties while keeping a heat resistance.

Lubricant composition

A grease composition, which comprises (A) a perfluoropolyether base oil, (B) a thickener, and (C) barium sulfate and/or antimony oxide, where 0.1-50% by weight of the component (B) and 1-25% by weight of the component (C) are contained, has a distinguished effect on improvements of abrasion resistance, friction characteristics, load durability, high-temperature durability and corrosion resistance without any deterioration of heat resistance by adding at least one of barium sulfate and antimony oxide, each having an average primary particle size of 0.1-20 &#x3bc;m, as component (C).

Grease composition

An electroconductive grease-filled bearing is a rolling bearing comprising an inner raceand an outer race, both of the races being coaxially provided, a plurality of steel ballsradially being retained between track surfaces of the races, the bearing rotatably supporting the edge of heating rollin the fixing section of an electrostatic transfer copying machine, fixed to the inner periphery of inner race, an electroconductive grease to be filled between the track surfaces comprising a fluorocarbon oil as a base oil and graphite (or together with polytetrafluoroethylene) as a thickening agent. The electroconductive grease has a distinguished electroconductance so as to effectively discharge the static electricity, and has a distinguished heat-resistant durability even at elevated temperatures, and also prevents revolution failure due to the increased torque caused by an excessive lowering in the grease consistency, while maintaining the good electroconductance. The bearing is most suitable for rotatably supporting a photosensitive drum or a heating roll or a pressing-heating roll in the fixing section in an electrostatic transfer copying machine, and is also effective for stabilization of printed images.

Electroconductive grease-filled bearing

Growing community of inventors

Kitaibaraki, Japan

Jiro Yurimoto