Abstract: A bearing lubricant composition includes a base oil containing an ester compound (?) represent by the general formula (1), and has a pour point of ?30° C. or lower and a viscosity index of 150 or more. [wherein, A1 is a C3-8 linear or branched alkylene group; and at least one of Xa and Xb is a C2-20 linear or branched alkyl ether group, or when it is not an alkyl ether group, it is a C5-13 linear or branched alkyl group.

Abstract: A bearing lubricant composition includes a base oil containing an ester compound (?) represent by the general formula (1), and has a pour point of ?30° C. or lower and a viscosity index of 150 or more. [wherein, A1 is a C3-8 linear or branched alkylene group; and at least one of Xa and Xb is a C2-20 linear or branched alkyl ether group, or when it is not an alkyl ether group, it is a C5-13 linear or branched alkyl group.

Abstract: A bearing oil contains a first monoester which is an ester of a branched chain fatty acid containing 18 carbon atoms or a monounsaturated fatty acid containing 18 carbon atoms and ethylhexyl alcohol.

Abstract: A bearing oil contains a first monoester which is an ester of a branched chain fatty acid containing 18 carbon atoms or a monounsaturated fatty acid containing 18 carbon atoms and ethylhexyl alcohol.

Abstract: A high-temperature lubricating oil composition is provided, which is resistant to hardening and sludge formation, and displays minimal evaporation loss and superior thermal stability, even under practical high-temperature open system conditions such as those found in a tenter. A lubricating oil composition that provides excellent lubrication without damaging members used within working machinery is also provided. The lubricating oil composition comprises a polyolester based synthetic oil and a C12 to C72 fatty acid and/or a diphenylamine derivative containing an arylalkyl group with a number average molecular weight of 400 to 800.

Abstract: A high-temperature lubricating oil composition is provided, which is resistant to hardening and sludge formation, and displays minimal evaporation loss and superior thermal stability, even under practical high-temperature open system conditions such as those found in a tenter. A lubricating oil composition that provides excellent lubrication without damaging members used within working machinery is also provided. The lubricating oil composition comprises a polyolester based synthetic oil and a C12 to C72 fatty acid and/or a diphenylamine derivative containing an arylalkyl group with a number average molecular weight of 400 to 800.