| abstract |
A grease composition for resin lubrication that is suitable for lubrication between a resin member and a metal member and that can reduce wear of the resin member as compared with the conventional one, and electric motor that has less wear on the resin portion of the worm wheel and has excellent durability. A power steering device is provided. A base oil containing at least one of poly α-olefin oil, mineral oil, and highly refined mineral oil in a proportion of 50% by mass or more of the total amount of the base oil, and at least one of metal soap and metal composite soap, A grease composition for resin lubrication containing a thickening agent contained in a proportion of 50% by mass or more, at least one of a non-polar wax and a polar wax, and a deceleration composed of a resin worm wheel and a metal worm An electric power steering apparatus comprising a gear and lubricated with the resin lubricating grease composition. [Selection figure] None |