| abstract |
PROBLEM TO BE SOLVED: To provide a marine bearing having a large bearing damage surface pressure, a lubricating property and a rust prevention property equivalent to those of a conventional mineral oil-based lubricating oil, and a biodegradability higher than that of a conventional one and compatible with seawater. Providing lubricating oil for propellers. SOLUTION: A water-soluble alkylene glycol and / or polyalkylene glycol (A) having a number average molecular weight of 1,000 or less is used as a base oil, and it contains a water-soluble thickener (B) and a water-soluble rust inhibitor (C). And (B) 1 to 10% by weight, and (C), based on the weight of the ship bearing propellant lubricating oil. This is a lubricating oil for marine bearing propulsor containing 1 to 10% by weight and having a bearing damage surface pressure at 50 ° C. of 3.5 MPa or more. [Selection figure] None |