Rolling-element Fatigue Life of AMS 5900 BallsNational Aeronautics and Space Administration, Scientific and Technical Information Branch, 1983 - Ball-bearings - 10 pages |
From inside the book
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Page 1
... were tested which differed only by the process used to form the ball blanks ... cracks which initiated fatigue spalls where these cracks were crossed by ... cracks were omitted . INTRODUCTION Rolling - element bearings for aircraft ...
... were tested which differed only by the process used to form the ball blanks ... cracks which initiated fatigue spalls where these cracks were crossed by ... cracks were omitted . INTRODUCTION Rolling - element bearings for aircraft ...
Page 7
... cracks omitted . eRetained austenite , 6.3 vol . % . were randomly selected from the rejected group of cracked balls and were carefully oriented as upper balls with the cracks crossing ... was run at the identical conditions to the fatigue ...
... cracks omitted . eRetained austenite , 6.3 vol . % . were randomly selected from the rejected group of cracked balls and were carefully oriented as upper balls with the cracks crossing ... was run at the identical conditions to the fatigue ...
Page 9
... were run at a maximum Hertz stress of 5.52 GPa ( 800 000 psi ) , a shaft ... cracks which initiated fatigue spalls where these cracks were crossed by ... cracks were omitted from the tests . Lewis Research Center National Aeronautics and ...
... were run at a maximum Hertz stress of 5.52 GPa ( 800 000 psi ) , a shaft ... cracks which initiated fatigue spalls where these cracks were crossed by ... cracks were omitted from the tests . Lewis Research Center National Aeronautics and ...
Common terms and phrases
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