ASTM-D217 › Historical Revision Information
Standard Test Methods for Cone Penetration of Lubricating Grease
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Scope
1.1 These test methods cover four procedures for measuring the consistency of lubricating greases by the penetration of a cone of specified dimensions, mass, and finish. The penetration is measured in tenths of a millimetre.
Note 1—The National Lubricating Grease Institute (NLGI) classified greases according to their consistency as measured by the worked penetration. The classification system is as follows:
Significance and Use
These cone penetration tests not only evaluate the consistency of lubricating greases over the full range of NLGI numbers from 000 to 6, but also evaluate the consistency of stiff greases having penetration numbers less than 85. In contrast, Test Method D937 is aimed at petrolatums and Test Method D1403 uses less precise one-quarter and one-half scale equipment intended for use when the sample quantity is limited.
Cone penetration test results provide one measure of the consistency of a grease. Worked penetration results are required to determine to which NLGI consistency grade a grease belongs. Undisturbed penetration results provide a means of evaluating the effect of storage conditions on grease consistency.
Although no correlation has been developed between cone penetration results and field service, the cone penetrations obtained by the four procedures are widely used for specification purposes, such as in users' material specifications and suppliers' manufacturing specifications.
Keywords
consistency; grease; lubricating grease; penetration; penetrometer; worked penetration; Cone penetration; Consistency--petroleum products; Coulometry; Lubricating grease; National Lubricating Grease Institute (NLGI); Penetration--petroleum productsapplications
To find similar documents by ASTM Volume:
05.01 (Petroleum Products and Lubricants (I): D56 - D3710)
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Document Number
ASTM-D217-10
Revision Level
2010 EDITION
Status
Superseded
Modification Type
Revision
Publication Date
May 1, 2010
Document Type
Test Method
Page Count
14 pages
Committee Number
D02.G0.02