NASA NTRS · 19670000009
Tester for study of rolling element bearings
Abstract
Five-ball fatigue tester makes possible the study of rolling element phenomena. The device consists of a driven test ball pyramided upon four lower balls positioned by a separator and free to rotate in an angular contact raceway.
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Zaretsky, E. V.. 1967-02-01. Tester for study of rolling element bearings. https://ntrs.nasa.gov/citations/19670000009
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