A grease composition includes a base oil, a thickener, and an extreme pressure additive. The base oil contains trimellitate ester and poly-α-olefin. A proportion of the trimellitate ester to a total amount of the trimellitate ester and the poly-α-olefin is 10.0 mass% or more and 60.0 mass% or less. The thickener contains lithium 12-hydroxystearate and lithium stearate. A proportion of the lithium 12-hydroxystearate to a total amount of the lithium 12-hydroxystearate and the lithium stearate is 5.0 mass% or more and 95.0 mass% or less. The extreme pressure additive contains molybdenum dialkyl dithiocarbamate. A proportion of the molybdenum dialkyl dithiocarbamate to a total amount of the trimellitate ester, the poly-α-olefin, the lithium 12-hydroxystearate, the lithium stearate, and the molybdenum dialkyl dithiocarbamate is 0.6 mass% or more and 16.0 mass% or less.
GREASE COMPOSITION AND STEERING GEAR DEVICE
SCHMIERFETTZUSAMMENSETZUNG UND LENKGETRIEBEVORRICHTUNG
COMPOSITION DE GRAISSE, ET DISPOSITIF DE BOÎTIER DE DIRECTION
2025-05-21
Patent
Electronic Resource
English
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