摘要:
A grease-filled bearing filled with a grease composition containing a thickener which is a diurea compound represented by R 1 -NHCONH-R 2 -NHCONH-R 3 or a mixture thereof and a base oil containing alkyl diphenyl ether oil and containing poly α-olefin oil as an optional component at a mass ratio of 40:60 to 100:0 (alkyl diphenyl ether oil:poly α-olefin oil). In general formula (1), at least one of R 1 and R 3 is a C 6-12 aromatic hydrocarbon group and the other is a C 6-12 aromatic hydrocarbon group or a C 6-20 aliphatic hydrocarbon group. R 2 is a C 6-15 aromatic hydrocarbon group.
摘要:
A rolling bearing in which multiple rolling elements are disposed between an inner ring and an outer ring in such a state that the rolling elements can roll and which is filled with a grease composition that is obtained by adding three kinds of rust preventives to a base oil consisting of at least one mineral or synthetic oil and exhibiting a kinematic viscosity of 200 to 400mm 2 /s at 40°C and that exhibits a cone penetration of 300 to 400 and a yield stress at 40°C of 150Pa or less, said three kinds of rust preventives being a carboxylic acid-based rust preventive, a carboxylic salt-based rust preventive and an amine-based rust preventive.
摘要:
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.