ASTM D1264 Determining The Water Washout Characteristics Of Lubricating Greases
A standard ABEC 6204 test bearing is packed with 4 grams of the grease to be tested. The bearing is rotated at 600 rpm in the water spray chamber at 100°F (38°C) or 175°F (79°C) for one hour. 300 mls of water per minute are sprayed at the bearing assembly. The percent weight loss of the grease carried away with the water is reported. This test is a relative measure of a grease’s ability to resist removal by water.