| abstract |
(57) [Summary] (Corrected) [Purpose] Sliding that provides excellent effect of improving the positioning accuracy of the machining table even for machine tools that use cast iron-fluorine resin or cast iron-cast iron as the sliding guide surface. A lubricating oil composition for a guide surface is provided. A lubricating oil composition for a sliding guide surface, which comprises a mineral oil and / or a synthetic oil containing 0.01 to 30% by weight of the phosphorus compound of the general formula 1 based on the total amount of the composition. [M is a number of 0 or 1, R 1 , R 2 and R 3 are independently a hydrogen atom, a C1-24 alkyl group or an alkenyl group, or the following formula 2- (R 4 —O) n —R 5 (2) (R 4 is an alkylene group having 2 to 4 carbon atoms, R 5 is C 8 to 24 alkyl groups or alkenyl groups, n is 2 to 2 4 represents a number of 4), and at least one of them is a polyoxyalkylene group] |