I have a rotating splined coupling that I am trying to determine the best grease for. High shear resistance is of greatest importance as all tested soap thickened greases separate too quickly in service. I also need a NGLI 1.5 or thicker or else the grease leaks out of the coupling. What test of performance (eg Timken OK, 4 ball wear, etc...) would best describe a grease's ability to prevent fretting of a splined shaft? What testing is used to quantify the shear resistance of a grease?
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