ASTM-D4425 › Standard Test Method for Oil Separation from Lubricating Grease by Centrifuging (Koppers Method)
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Scope
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, health, and environmental practices and determine the applicability of regulatory limitations prior to use.
1.4 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
Significance and Use
5.1 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.3
Keywords
centrifuge; grease; lubricating grease; oil separation ;
To find similar documents by ASTM Volume:
05.02 (Petroleum Products and Lubricants (II): D3711 - D6122)
To find similar documents by classification:
To find similar documents by Federal Supply Class Code:
FSC 9330 (Plastics Fabricated Materials)
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Document Number
ASTM-D4425-19
Revision Level
2019 EDITION
Status
Current
Modification Type
Revision
Publication Date
June 1, 2019
Document Type
Test Method
Page Count
4 pages
Committee Number
D02.G0.03