Accession Number:

AD0405572

Title:

PROGRAM 461 RELIABILITY MATERIALS RESEARCH AND APPLICATION EVALUATION OF BEARING MATERIALS AND LUBRICANTS FOR SPACE ENVIRONMENT

Descriptive Note:

Final rept.

Corporate Author:

LOCKHEED MISSILES AND SPACE CO INC SUNNYVALE CA

Personal Author(s):

Report Date:

1963-04-01

Pagination or Media Count:

44.0

Abstract:

The best operating lifetimes in a vacuum were achieved with oil and grease lubricants. Of the 37 tests conducted with 28 oils, double-shielded bearings with vacuum impregnated paper base phenolic retainers lubricated with 4 oils one low-volatility petroleum base oil and 3 halo genated silicones gave lifetimes of over 1 year. Of 13 greases evaluated in 16 tests, 4 greases, composed of silicone oils in shielded bearings showed lifetimes of over 1 year. On the basis of coast times, torque was abousame for oil lubricated bearings with phenolic retainers as for the grease-lubricated bearings with metal ribbon retainers. Of the total oil tests in a vacuum, 1 oil Apiezon K has achieved 18,297 hours of test time and is still running. Of the total grease tests in a vacuum, 1 grease Aero shell-15 has achieved 13,364 hours and is still running. Of the 29 tests conducted, on different dry-film lubricants, 15 showed poor reproducibil ity and all had limited lifetimes under a 100 duty cycle. The maximum lifetime achieved was 2,213 hours. However, similar tests on the same material gave test times of 876, 245, 342, and 132 hours. Eight self- lubricating retainer materials were evaluated in 19 tests. Two poly tetrafluoroethylene compositions gave the best results 5,000 and 3,000 hours. Author

Subject Categories:

  • Lubricants and Hydraulic Fluids

Distribution Statement:

APPROVED FOR PUBLIC RELEASE