Comparison of Lubricant Performance in an Oscillating Spacecraft Mechanism

[+] Author and Article Information
D. J. Carré, P. D. Fleischauer, C. G. Kalogeras, H. D. Marten

Chemistry and Physics Laboratory, The Aerospace Corporation, El Segundo, CA 90009-2960

J. Tribol 113(2), 308-312 (Apr 01, 1991) (5 pages) doi:10.1115/1.2920621 History: Received February 15, 1990; Revised July 03, 1990; Online June 05, 2008


A life test of lubricants for the R2 shaft bearings of a spacecraft oscillating scanner mechanism was performed under simulated orbital conditions. The lubricant originally used in the application, a chloroarylalkylsiloxane (CAS) oil, and a linear perfluoropolyalkylether (PFPE) oil failed in less than 2500 hr of operation. A poly-alpha-olefin (PAO) oil has been running for more than 11,000 hr without any indication of lubricant or system degradation. The performances of the oils are discussed in terms of the boundary lubrication conditions of the test.

Copyright © 1991 by The American Society of Mechanical Engineers
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