Kyodo Yushi Co., Ltd.

Nsk Corporation

Masatoshi Ijima

Hiroaki Ishikawa

Yuta Sato

Iwaki Hirooka

Suguru Sugawara

Kazuki Isa

Yuki Takeyama

A grease composition for vehicular hub unit bearings is provided, in which a base oil is a synthetic hydrocarbon oil having a kinematic viscosity at 40° C. of 25-50 mm/s, a thickener is an alicyclic aliphatic diurea compound, based on a total mass of the composition, 0.1-5% by mass of a carboxylic acid-based corrosion inhibitor, 0.1-5% by mass of a carboxylic acid salt-based corrosion inhibitor, and 0.1-3% by mass of an amine salt of a fatty acid are contained, and a worked penetration is 220-270.

Grease composition for vehicular hub unit bearings

The present invention provides a grease composition comprising (a) a base oil, (b) a thickener comprising a urea compound, (c) an amine antioxidant at 0.5 to 5% by mass based on a total mass of the composition, and (d) a quinoline antioxidant at 0.5 to 5% by mass based on the total mass of the composition.

Grease composition

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Fujisawa, Japan

Masatoshi Ijima