To provide a novel lubricant composition which neither rises in consistency nor separates the lubricating base oil nor leaks the separated lubricating base oil even when repeatedly stressed over a long period, a reduction gear using the above lubricant composition, and an electric power steering device.
The lubricant composition uses at least two types of combined thickening agents including lithium stearate as a thickening agent and has a worked penetration (25°C) of 355 or more. The reduction gear 50 is filled with the above lubricant composition containing fine particles. The electric power steering system comprises the above reduction gear.
KYODO YUSHI CO LTD
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