1.1 ,This test method covers a procedure for determining the lubricating action of greases in order to prevent “,fretting”, wear under linear oscillation with associated low strokes and high Hertzian contact pressures under high-frequency linear-oscillation motion using the SRV test machine. By performing additional, nonmandatory extreme-pressure tests in accordance with Test Method D5706, the test grease should be shown to be able to withstand a Hertzian contact pressure of at least 2200 ,MPa without adhesive failure.