Abstract: A bearing grease includes a base oil and a thickener, and the base oil includes mineral oil and poly-?-olefin. The poly-?-olefin may be a blend of poly-?-olefin having a kinetic viscosity higher than that of the mineral oil and poly-?-olefin having a kinetic viscosity equal to or lower than that of the mineral oil, and the kinetic viscosity of the base oil at 40° C. is in a range of 40 through 90 mm2/s. The amount of the poly-?-olefin by mass in the base oil is greater than the amount of the mineral oil by mass in the base oil. The worked penetration of the grease is in a range of 200 through 250. The grease reduces flying grease and outgas and has superior low-temperature characteristics.

Abstract: A grease for a rolling bearing of an information recording and reproducing apparatus contains a base oil, a thickener, and at least one kind of an antioxidant selected from an amine-based antioxidant expressed by the General Formula (1), and a phenol-based antioxidant expressed by the General Formula (2). The base oil contains a refined mineral oil classified as Group III in a base oil category defined by the American Petroleum Institute, and the flash point of the refined mineral oil is 240° C. or higher.

Abstract: Grease comprises a base oil and a thickener. The base oil contains mineral oil and poly-?-olefin, the proportion of the mineral oil is 10% by mass to 40% by mass in 100% by mass of the base oil, and a kinematic viscosity v1 of the mineral oil at 40° C. is higher than a kinematic viscosity v2 of the poly-?-olefin at 40° C. The base oil comprises a refined mineral oil that is classified as Group III in a base oil category defined by the American Petroleum Institute, and the flash point of the refined mineral oil is 240° C. or higher. A rolling bearing contains the grease, a rolling bearing device includes a shaft supported by the rolling bearing device, and an information recording and reproducing apparatus includes the rolling bearing device.

Abstract: The invention has an object of providing grease reduced in an amount of the flying grease and an amount of the outgas, and superior in low-temperature characteristic, an antifriction bearing using the grease, an antifriction bearing device, and an information recording/reproducing device. A grease includes a base oil, and a thickener, the base oil includes mineral oil and poly-?-olefin, the poly-?-olefin is higher in mass than the mineral oil, the poly-?-olefin includes poly-?-olefin higher in kinetic viscosity than the mineral oil, the kinetic viscosity of the base oil at 40° C. is in a range of 40 through 90 mm2/s, and worked penetration is in a range of 200 through 250. Further, an antifriction bearing, an antifriction bearing device, and an information recording/reproducing device use the grease.

Abstract: A grease composition includes a base oil, a thickener and at least one kind of an antioxidant selected from an amine-based antioxidant and a phenol-based antioxidant expressed by the following respective general formulas (1) and 2: The base oil contains a poly-?-olefin and a mineral oil. A mass ratio of poly-?-olefin/mineral oil is 1.25 to 9.

Abstract: Provided is grease for a rolling bearing of an information recording and reproducing apparatus 1, containing a base oil, a thickener, and at least one kind of an antioxidant selected from an amine-based antioxidant (A) expressed by the General Formula (1), and a phenol-based antioxidant (B) expressed by the General Formula (2).

Abstract: Grease for a rolling bearing of an information recording and reproducing apparatus 1 contains a base oil and a thickener, wherein the film thickness of an elasto-hydrodynamic lubrication film is 20 nm or greater. Grease for a rolling bearing of an information recording and reproducing apparatus 1 contains a base oil, and a thickener, wherein a width of the thickener in the grease is 20 nm or greater. A rolling bearing includes the grease for a rolling bearing. A rolling bearing device 6 includes a shaft and the rolling bearing. An information recording and reproducing apparatus 1 includes the rolling bearing device 6.

Abstract: Provided is grease for a rolling bearing of an information recording and reproducing apparatus 1, containing a base oil, a thickener, and at least one kind of an antioxidant selected from an amine-based antioxidant (A) expressed by the General Formula (1), and a phenol-based antioxidant (B) expressed by the General Formula (2).

Abstract: Provided are grease containing a base oil and a thickener, a rolling bearing including the grease, a rolling device 6, and an information recording and reproducing apparatus 1. The base oil contains mineral oil and poly-?-olefin, a proportion of the mineral oil is 10% by mass to 40% by mass in 100% by mass of the base oil, and a kinematic viscosity ?1 of the mineral oil at 40° C. is higher than a kinematic viscosity ?2 of the poly-?-olefin at 40° C.

Abstract: This method for inhibiting damage due to arc between electrical contacts involves the spreading of a grease composed of from 70% by weight to 95% by weight of a base oil and from 5% by weight to 30% by weight of a thickening agent and additives over a pair of electrical contacts in a circuit which causes terminals to move relative to each other so that they are disconnected from each other, whereby damage on the contact area due to arc occurring when the electrical contacts are isolated from each other is inhibited. As the thickening agent there is preferably used an organic bentonite. As the base oil there is preferably sued an ester oil, glycol oil or poly-?-olefin. The base oil preferably has a low density to reduce arc energy.