LUBRICATING OIL COMPOSITION FOR HIGH-SPEED GEAR

Title:

LUBRICATING OIL COMPOSITION FOR HIGH-SPEED GEAR

Document Type and Number:

WIPO Patent Application WO/1995/009904

Kind Code:

A1

Abstract:

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.

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Inventors:

ICHIHASHI TOSHIHIKO (JP)

Application Number:

PCT/JP1994/001662

Publication Date:

April 13, 1995

Filing Date:

October 05, 1994

Export Citation:

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Assignee:

IDEMITSU KOSAN CO (JP)
ICHIHASHI TOSHIHIKO (JP)

International Classes:

C10M141/10; C10M169/04; C10M171/02; (IPC1-7): C10M141/10; C10M169/04; C10M171/02

Foreign References:

JPH05186787A	1993-07-27
JPH03285990A	1991-12-17
JPH0232195A	1990-02-01
JPH024897A	1990-01-09
JPH02182787A	1990-07-17
JPH06313183A	1994-11-08

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