Film-Transfer Studies of Seven Ball-Bearing Retainer Materials in 60 deg. R (33 deg. K) Hydrogen Gas at 0.8 Million DN Value.
Abstract
Seven self-lubricating retainer materials (a laminated glass cloth with polytetrafluoroethylene (PTFE) binder, a glass-fiber - molybdenum disulfide-filled PTFE, a glass-fiber-filled PTFE, a bronze-filled PTFE, a copper - PTFE - tungsten diselenide composite, a silver - PTFE - tungsten diselenide composite, and a molybdenum disulfide-filled polyimide) were evaluated in 40-millimeter-bore ball bearings operating in hydrogen gas at 60 deg R (33 deg K). The bearings were operated at 20 000 rpm with a 200-pound (890 N) thrust load for total times to 10 hours. Individual bearing runs were of approximately 2-hour durations. The formation and subsequent life histories of the transfer films were studied and evaluated from highly magnified profile traces of the bearing inner-race grooves. The wear and mechanical integrity of the retainer materials were determined by visual observations and weight-differential measurements after each 2-hour run
Document Details
- Document Type
- Technical Report
- Publication Date
- Nov 01, 1966
- Accession Number
- ADA307837
Entities
People
- David E. Brewe
- Herbert W. Scibbe
- William J. Anderson
Organizations
- Glenn Research Center