Rolling-element Fatigue Life of AMS 5900 BallsNational Aeronautics and Space Administration, Scientific and Technical Information Branch, 1983 - Ball-bearings - 10 pages |
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10-percent fatigue 5900 then designated air cool 783 aircraft bearing AISI M-50 balls AISI M-50 ref AMS 5900 balls ball blanks balls at visible balls tested Bearing materials cold heading procedure confidence number considered is real contact angle corrosion cracks omitted cracks were crossed cracks were omitted Deep freeze 189 determined in five-ball fatigue failure fatigue life results five-ball fatigue tester HARDNESS AND RETAINED headed AMS 5900 heading had small identical conditions Lewis Research Center lot A AMS lot A balls lower balls lubricant maximum Hertz stress million stress cycles naphthenic mineral oil NASA number of upper-ball Performing Organization powder-processed VIM-VAR AMS premium quality material processed VIM-VAR raceway retained austenite Rolling-element bearings running tracks salt shaft speed superrefined naphthenic mineral temperature of 339 test assembly test series upper ball upper test ball upper-ball stress cycles vacuum arc remelt VIM-VAR AISI M-50 visible surface cracks warm headed AMS