Abstract: A rolling bearing including a plurality of rolling elements rollably provided between an inner ring and an outer ring and having enclosed therein a grease composition obtained by adding three kinds of antirust agents which are a carboxylic acid-based antirust agent, a carboxylate-based antirust agent and an amine-based antirust agent, to a base oil which contains at least one kind of a mineral oil and a synthetic oil and has a kinematic viscosity of 200 to 400 mm2/s at 40° C., the grease composition having a penetration of 300 to 400 and a yield stress of 150 Pa or less at 40° C.

Abstract: A grease-enclosed bearing having enclosed therein a grease composition containing a thickener which is a diurea compound represented by Formula (1) or a mixture thereof, and a base oil containing an alkyldiphenyl ether oil and a poly-?-olefin oil as an optional component in a mass ratio of alkyldiphenyl ether oil:poly-?-olefin oil=from 40:60 to 100:0: R1-NHCONH—R2-NHCONH—R3??Formula (1) wherein at least either one of R1 and R3 is an aromatic hydrocarbon group having a carbon number of 6 to 12, the other one is an aromatic hydrocarbon group having a carbon number of 6 to 12 or an aliphatic hydrocarbon group having a carbon number of 6 to 20, and R2 is an aromatic hydrocarbon group having a carbon number of 6 to 15.

Abstract: The present invention relates to: a grease composition that includes a base oil which has a pressure-viscosity coefficient as measured at 40° C. of 33 GPa?1 or less and a thickener which is contained in a projected-area proportion of 10% by area or higher; and a rolling device packed with the grease composition.