| abstract |
Provided is a grease composition capable of simultaneously suppressing bearing wear and fretting wear under a high load and extending the service life. [Solution] The grease composition of the present invention is a grease composition comprising a base oil and a thickener, and the base oil contains 40% by mass or more of a hydrocarbon-based synthetic oil and operates at 40 ° C. The grease composition contains 20% by mass or more and 70% by mass or less of A component having a viscosity of 70 mm 2 / s or less, and the kinematic viscosity of the base oil at 40 ° C. is 200 mm 2 / s or more and 2000 mm 2 / s or less. The penetration degree of is 220 or more and 350 or less. [Selection figure] None |