| 摘要 |
<p>A lubricating oil composition for high-speed gears, particularly those having a peripheral speed of at least 10 m/sec, prepared by compounding a lube base oil having a percentage CA of 5 or less and desirably a nitrogen content of 50 ppm or less and a sulfur content of 50 ppm or less with additives based on, respectively, sulfur, phosphorus and nitrogen in such amounts that the element ratio, 100 N/(S+P), in the composition ranges from 4 to 10 by weight. The composition serves to develop satisfactory hypoid gear performance, is reduced in sludge formation, and can lengthen the service life of oil seal used in the high-speed and high-temperature rotating parts.</p> |
