ASTM D7918-15

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Designation: D7918 − 15
Standard Test Method for
Measurement of Flow Properties and Evaluation of Wear,
Contaminants and Oxidative Properties of Lubricating
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Grease by Die Extrusion Method and Preparation
This standard is issued under the fixed designation D7918; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope tent in Lubricating Greases by Linear SweepVoltammetry
D7718 Practice for Obtaining In-Service Samples of Lubri-
1.1 This test method covers the determination and evalua-
cating Grease
tion of flow properties, wear levels, contaminants, and oxida-
D7843 Test Method for Measurement of Lubricant Gener-
tive condition of new and in-service lubricating grease.
ated Insoluble Color Bodies in In-Service Turbine Oils
1.2 This test method provides guidance on evaluating in-
using Membrane Patch Colorimetry
service grease samples, NLGI grades 00 to 3, for wear,
E177 Practice for Use of the Terms Precision and Bias in
consistency, contamination, and oxidation.
ASTM Test Methods
1.3 The values stated in SI units are to be regarded as the E691 Practice for Conducting an Interlaboratory Study to
Determine the Precision of a Test Method
standard. The values given in parentheses are for information
only.
3. Terminology
1.3.1 Exception—The exception to this will be where units
of references were developed by the developers of the test
3.1 Definitions:
equipment and necessary to report the results of the test.
3.1.1 active grease sampling device, n—device designed to
1.4 This standard does not purport to address all of the
take an active sample of a lubricating grease from a bearing,
safety concerns, if any, associated with its use. It is the gear, or drive shaft located in a grease lubricated component.
responsibility of the user of this standard to establish appro-
D7718
priate safety and health practices and determine the applica- 3.1.1.1 Discussion—The Grease Thief (trademarked) Type
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bility of regulatory limitations prior to use.
2 is a tool which meets this description and can be used to
obtain an active grease sample from a lubricated component.A
2. Referenced Documents
full description and dimensions of this device can be found in
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Annex A2.
2.1 ASTM Standards:
D217 Test Methods for Cone Penetration of Lubricating
3.1.2 active sampling, v—to use a sampling device to
Grease
actively gather an in-service lubricating grease sample from a
D4175 Terminology Relating to Petroleum, Petroleum
grease-lubricated component. D7718
Products, and Lubricants
3.1.3 calibration, n—the determination of the values of the
D6595 Test Method for Determination of Wear Metals and
significant parameters by comparison with values indicated by
Contaminants in Used Lubricating Oils or Used Hydraulic
a set of reference standards. D6595
Fluids by Rotating Disc ElectrodeAtomic Emission Spec-
3.1.4 consistency, n—of lubricating grease, the degree of
trometry
resistance to movement under stress. D217
D7527 Test Method for Measurement of Antioxidant Con-
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This test method is under the jurisdiction of ASTM Committee D02 on The Grease Thief Type I and Type II is described in US Patent No. 7984661.
Petroleum Products, Liquid Fuels, and Lubricants and is the direct responsibility of Interested parties are invited to submit information regarding the identification of an
Subcommittee D02.96.07 on Integrated Testers, Instrumentation Techniques for alternative(s) to this patented item to the ASTM International Headquarters. Your
In-Service Lubricants. comments will receive careful consideration at a meeting of the responsible
Current edition approved June 1, 2015. Published June 2015. DOI: 10.1520/ technical committee, which you may attend. The sole source of the Grease Thief
D7918-15. Type I and Type II are known to the committee is York Laboratories, LLC located
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For referenced ASTM standards, visit the ASTM website, www.astm.org, or at 410 Kings Mill Rd., York, PA 17401. If you are aware of alternative suppliers,
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM please provide this information to ASTM International Headquarters. Your com-
Standards volume information, refer to the standard’s Document Summary page on ments will receive careful consideration at a meeting of the responsible technical
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the ASTM website. committee, which you may attend.
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D7918 − 15
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