NASA Logo

NTRS

NTRS - NASA Technical Reports Server

Back to Results
Accelerated vacuum testing of long life ball bearings and slipringsExtensive analytical studies and testing have been conducted on bearings and sliprings in vacuum at temperatures from 30 to 130 F. Thirty-six bearings lubricated with two types of oil were tested in vacuum of less than 10 to the minus 8th power torr at speeds from 55 to 180 rpm. Temperatures, load, speed, and oil viscosity were varied to evaluate the effects on life and wear. All bearings performed successfully during a 7-month test, and the potential merits of the two oils were compared. Over 25 different, dry-lubricated brush/slipring material combinations have been tested, with variations of brush and ring design and surface speed. Test results indicate the probability of 10 years or more of slipring and brush lifetime with properly designed brushes for 1-in.-diameter ring rotating at 60 rpm.
Document ID
19720005758
Document Type
Other
Authors
Meeks, C. R. (Hughes Aircraft Co. El Segundo, CA, United States)
Christy, R. I. (Hughes Aircraft Co. El Segundo, CA, United States)
Cunningham, A. C. (Hughes Aircraft Co. El Segundo, CA, United States)
Date Acquired
August 6, 2013
Publication Date
January 1, 1971
Publication Information
Publication: NASA. Goddard Space Flight Center 5th Aerospace Mech. Symp.
Subject Category
MACHINE ELEMENTS AND PROCESSES
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

Related Records

IDRelationTitle19720005742Analytic PrimaryFifth Aerospace Mechanisms SymposiumN72-13391 04-15Analytic Primary
Document Inquiry