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ASTM D4425-09

Historical Revision

Standard Test Method for Oil Separation from Lubricating Grease by Centrifuging (Koppers Method)

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1.1 This test method covers a procedure for determining the tendency of lubricating grease to separate oil when subjected to high centrifugal forces.

1.2 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.

1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.

This test method is useful in evaluating the degree to which a grease would separate into fluid and solid components when subjected to high centrifugal forces. Flexible shaft couplings, universal joints, and rolling element thrust bearings are examples of machinery which subject lubricating greases to large and prolonged centrifugal forces. This test method has been found to give results that correlate well with results from actual service. The test method may be run at other conditions with agreement between parties but the precision noted in this test method will no longer apply.

SDO ASTM: ASTM International
Document Number D4425
Publication Date April 15, 2009
Language en - English
Page Count 4
Revision Level 09
Supercedes
Committee D02.G0.03
Publish Date Document Id Type View
Nov. 1, 2024 D4425-24 Revision
June 1, 2019 D4425-19 Revision
April 15, 2009 D4425-09 Revision
June 10, 1997 D4425-97R02 Revision
June 10, 1997 D4425-97 Revision
Oct. 1, 2014 D4425-09R14 Reaffirmation