Accession Number : ADA307828
Title : Cooling Requirements of Ball Bearings Lubricated by Glass-Fiber-Filled Polytetrafluoroethylene Retainers in Cold Hydrogen Gas.
Descriptive Note : Technical note,
Corporate Author : NATIONAL AERONAUTICS AND SPACE ADMINISTRATION CLEVELAND OH LEWIS RESEARCH CEN TER
Personal Author(s) : Coe, Harold H. ; Brewe, David B. ; Schibbe, Herbert W.
PDF Url : ADA307828
Report Date : FEB 1970
Pagination or Media Count : 27
Abstract : Experiments were performed with 40-mm-bore ball bearings operating at shaft speeds to 35 000 rpm and thrust loads to 400 lbs (1780 N) in 60 deg R (33 K) hydrogen gas. The minimum coolant flow rate equation developed for bearings equipped with this retainer material was similar to the equation determined in a previous study for bearings with a bronze-filled polytetrafluoroethylene (PTFE) retainer. Retainer wear rate was very low; some inner-race ball-track wear was evident for bearings that had been run for more than 7 hours.
Descriptors : *COOLING, *HYDROGEN, *GLASS FIBERS, *LUBRICATION, *BALL BEARINGS, *COLD GASES, VELOCITY, POLYMERS, GASES, FLOW RATE, COOLANTS, SHAFTS(MACHINE ELEMENTS).
Subject Categories : Machinery and Tools
Lubricants and Hydraulic Fluids
Distribution Statement : APPROVED FOR PUBLIC RELEASE