ASTM_D_6184_-_17.pdf

Designation:D618417Standard Test Method forOil Separation from Lubricating Grease(Conical SieveMethod)1This standard is issued under the fixed designation D6184;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of last revision.A number in parentheses indicates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.This standard has been approved for use by agencies of the U.S.Department of Defense.INTRODUCTIONThe conical sieve method for measuring leakage from lubricating grease(commonly known as thecone bleed test)uses the same equipment as the obsolete,withdrawn FED-STD-791C(Federal TestMethod(FTM)791C)Method 321.3,Oil Separation from Lubricating Grease(Static Technique).Despite the lack of a precision statement,Method 321.3 was used for many years in specifications toevaluate the tendencies of base fluid separation from military and industrial greases.Test MethodD6184 supersedes the FTM method by overcoming deficiencies of Method 321.3.It includes theprocedures and precision determinations resultant from a cooperative study conducted by participatingmembers of Subcommittee D02.G0.1.Scope*1.1 This test method covers the determination of the ten-dency of lubricating grease to separate oil at an elevatedtemperature.This test method shall be conducted at 100 C for30 h unless other conditions are required by the grease speci-fication.1.2 This test method can be used on any grease with aworked penetration(Test Methods D217)greater than220 mm10(NLGI Consistency Number 3 or softer).However,no precision data exists for greases with a penetration greaterthan 340 mm10(softer than NLGI Consistency Number 1).1.3 The values stated in SI units are to be regarded asstandard.The term 60 mesh is used to describe the wire meshused.This unit was described in the withdrawn E437 standardand there is no exact metric equivalent.1.4 This standard does not purport to address all the safetyconcerns,if any,associated with its use.It is the responsibilityof the user of this standard to establish appropriate safetypractices and determine the applicability of regulatory limita-tions prior to use.1.5 This international standard was developed in accor-dance with internationally recognized principles on standard-ization established in the Decision on Principles for theDevelopment of International Standards,Guides and Recom-mendations issued by the World Trade Organization TechnicalBarriers to Trade(TBT)Committee.2.Referenced Documents2.1 ASTM Standards:2D217 Test Methods for Cone Penetration of LubricatingGreaseD1742 Test Method for Oil Separation from LubricatingGrease During StorageE437 Specification for Industrial Wire Cloth and Screens(Square Opening Series)(Discontinued 2000)Replacedby E 2016(Withdrawn 2000)32.2 Government Standard(Withdrawn):FED-STD-791C Lubricants,Liquid Fuels,and RelatedProducts;Methods of Testing,Method 321.3“Oil Sepa-ration from Lubricating Greases(Static Technique),”Withdrawn November 200743.Terminology3.1 Definitions:3.1.1 lubricating grease,na semifluid to solid product ofa dispersion of a thickener in a liquid lubricant.1This test method is under the jurisdiction of ASTM Committee D02 onPetroleum Products,Liquid Fuels,and Lubricants and is the direct responsibility ofSubcommittee D02.G0.03 on Physical TestsCurrent edition approved May 1,2017.Published June 2017.Originallyapproved in 1997.Last previous edition approved in 2016 as D6184 16.DOI:10.1520/D6184-17.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMStandards volume information,refer to the standards Document Summary page onthe ASTM website.3The last approved version of this historical standard is referenced onwww.astm.org.4Available online at ASSIST Quick Search(http:/quicksearch.dla.mil).*A Summary of Changes section appears at the end of this standardCopyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United StatesThis international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for theDevelopment of International Standards,Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade(TBT)Committee.1 3.1.1.1 DiscussionThe dispersion of the thickener forms atwo-phase system and immobilizes the liquid lubricant bysurface tension and other physical forces.Other ingredientsimparting special properties are often included.D2173.1.2 oil separation,nthe appearance of a liquid fractionfrom an otherwise homogeneous lubricating composition.D17423.1.3 thickener,nin a lubricating grease,a substancecomposed of finely divided particles dispersed in a liquidlubricant to form the products structure.3.1.3.1 DiscussionThe thickener can be fibers(such asvarious metallic soaps