Rolling-element Fatigue Life of AMS 5900 BallsNational Aeronautics and Space Administration, Scientific and Technical Information Branch, 1983 - Ball-bearings - 10 pages |
Common terms and phrases
10-percent fatigue 5900 then designated air cool 783 aircraft bearing AISI M-50 balls AMS 5749 balls AMS 5900 balls ball fatigue balls fabricated balls in five-ball balls tested Bearing materials CHEMICAL COMPOSITIONS cold headed balls cold heading procedure confidence number contact angle corrosion cracks were crossed fatigue failure fatigue life results five-ball fatigue tester HARDNESS AND RETAINED headed AMS 5900 heading had small hr Temper 797 identical conditions initiated fatigue spalls Lewis Research Center lot A AMS lot A balls lower balls lubricant m²/sec maximum Hertz stress million stress cycles naphthenic mineral oil NASA Performing Organization powder-processed VIM-VAR AMS premium quality material raceway retained austenite Rolling-element bearings running tracks salt shaft speed stress of 5.52 superrefined naphthenic mineral test assembly TEST MATERIALS Material test series upper ball upper test ball upper-ball stress cycles vacuum arc remelt VIM-VAR AISI M-50 VIM-VAR processed visible surface cracks warm headed balls