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Life of Pennzane and 815Z-Lubricated Instrument Bearings Cleaned with Non-CFC SolventsLife tests were conducted on instrument scanner ball bearings cleaned with 3 types of non-ozone depleting solvents and compared with those cleaned with a conventional CFC-113 (Freon) solvent. The test bearings were lubricated with the standard space oil (Bray 815Z, Fomblin Z25) and a more recent synthetic space oil (Pennzane 2001). Lives with replacement solvents equaled or exceeded those obtained with CFC-113 baseline, indicating that alternate cleaning solvents were acceptable. Pennzane lubricated bearings enjoyed a significant life advantage (>5X) over those lubricated with Bray 815Z oil in these oscillatory gimbal bearing tests. Many of the Pennzane bearings are still exhibiting acceptable torque traces after more than 25,000 hr of test.
Document ID
Document Type
Reprint (Version printed in journal)
Loewenthal, Stuart H. (Lockheed Martin Missiles and Space Sunnyvale, CA United States)
Jones, William R., Jr. (NASA Glenn Research Center Cleveland, OH United States)
Predmore, Roamer E. (NASA Goddard Space Flight Center Greenbelt, MD United States)
Date Acquired
September 6, 2013
Publication Date
September 1, 1999
Subject Category
Nonmetallic Materials
Report/Patent Number
NAS 1.15:209392
Meeting Information
European Space Mechanisms and Tribology(Toulouse)
Funding Number(s)
PROJECT: RTOP 226-11-15
Distribution Limits
Work of the US Gov. Public Use Permitted.

Available Downloads

NameType 19990095611.pdf STI