ASTM D2266, Standard test method for Wear Preventive Characteristics of lubricating grease (Four-ball method), (K10800 Four Ball Wear and EP Tester, which measures relative wear-preventing properties of lubricating fluids and greases in sliding and rolling applications. Performs both wear preventative (WP) and extreme pressure (EP) analysis on lubricating greases.)
1.1 This test method covers the determination of the wear preventive characteristics of greases in sliding steel-on-steel application. It is not intend to predict wear characteristics with metal combinations other than steel-on-steel or to evaluate the extreme pressure characteristics of the greases.
1.2 The values stated in SI unites are to be regarded as the standard except where the test apparatus or consumable parts are only available in other units. In such cases, these will e regaraded as standard. The values given in parentheses are for informations only.
1.3 This standard does not purport to address all of the satety problems, if any, associated with its usage. It is the responsibility of users of this standard to establish appropriate saftey and health practices and determine the applicability of regulatory limitations prior to use.