Ntn Corporation

Other

Kyodo Yushi Co., Ltd.

Ntn Toyo Bearing Co., Ltd.

Keizo Nagasawa

Kiyoshi Takeuchi

Takashi Okaniwa

Yukio Asahara

Tsutomu Yoshida

Shinichi Takabe

Yoshikazu Fukumura

Katsuyuki Ikei

Yoichi Suzuki

Mitsuhiro Kakizaki

Takahiro Ozaki

Yukio Hasegawa

Takao Nishimura

Ryuichi Masumori

Toshiharu Kato

Kiyoshi Nakanishi

Tasuku Sato

Takashi Hosoya

A spherical inner surface of the outer race and track grooves in the outer race are each defined by a post-hardening cut surface. A spherical outer surface of the inner race and track grooves in the inner race are also each defined by a post-hardening cut surface. A retainer has a spherical outer surface, a spherical inner surface and inner surfaces of the pockets, all of which are defined by a post-hardening cut surface. Respective surfaces of the retainer, the outer race and the inner race which contact with each other are formed with a surface treatment layer for reducing a frictional resistance.

Constant velocity universal joint

The present invention relates to a grease composition for a constant velocity joint, which has a low coefficient of friction to decrease the vibrations of CVJ, which comprises a base oil, a urea thickening agent, (A) a molybdenum dialkyldithiocarbamate, (B) at least one molybdenum di(alkyl or aryl)dithiophosphate represented by formula (I):

Grease composition for constant velocity joint

A grease composition for constant velocity joints comprising: (a) a base oil; (b) a diurea thickener of the formula (1):

Grease composition for constant velocity joints

A grease composition for constant velocity joint, particularly Zeppa type joint comprises a base oil and contains (A) a particular diurea compound as a thickener, (B) molybdenum sulfide dialkyldithiocarbamate, (C) an extreme pressure additive of zinc dithiophosphate, (D) a sulfur-phosphorus series extreme pressure additive containing no metallic element and having a sulfur content of 10-30% by weight and a phosphorus content of 0.5-5% by weight, and (E) lead dialkyldithiocarbamate as an essential component.

Improved greases for use in homokinetic joints are proposed which comprise a base oil, a thickening agent, and an organic molybdenum compound. Greases comprising a base oil, a thickening agent, an organic molybdenum compound, and an organic zinc compound are also proposed. These greases exhibit smaller friction coefficients than conventional greases used for this purpose. On the homokinetic joint lubricated with the grease according to the present invention, the axial force produced is reduced and vibrations generated on the engine are absorbed. The vehicle is prevented from vibrating. The use of an expensive organic metallic extreme-pressure additive is unnecessary.

Grease for homokinetic joint

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Iwata, Japan

Keizo Nagasawa