| abstract |
An object of the present invention is to provide an ester-based lubricating base oil for a hydrodynamic bearing that has excellent hydrolysis resistance, a high viscosity index, and good low-temperature fluidity. A mixed ester obtained by blending a specific aliphatic monocarboxylic acid ester compound and a 3-methyl-1,5-pentanediol diester compound in a specific ratio is used as a lubricating base oil for a fluid bearing. [Selection figure] None |