Statistics – Applications
Scientific paper
Sep 2001
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001esasp.480...43a&link_type=abstract
In: Proceedings of the 9th European Space Mechanisms and Tribology Symposium, 19-21 September 2001, Liège, Belgium. Compiled by
Statistics
Applications
Tribology
Scientific paper
ESTL has completed a programme to identify and qualify a self-lubricating material to replace RT/duroid 5813 ("Duroid"), for ball bearing cage applications in space mechanisms. Following literature reviews, material evaluations, friction and wear testing and a ball bearing screening test programme, PGM-HT (a PTFE/MoS2/glass fibre composite) was selected for evaluation in ball bearings. PGM-HT cages were tested extensively in conditions representative of that experienced by a selection of current mechanism applications. Different types (and sizes) of ball bearings and cages were tested over a range of operating speeds, loads (contact stresses) and under different environments. From these tests, it was concluded that the torque behaviour of PGM-HT lubricated bearings was identical to that of Duroid. A design guide was then prepared to summarise the findings and assist designers with torque and lifetime predictions.
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