ASTM_D_2625_-_94_2015.pdf

Designation:D262594(Reapproved 2015)Standard Test Method forEndurance(Wear)Life and Load-Carrying Capacity of SolidFilm Lubricants(Falex Pin and Vee Method)1This standard is issued under the fixed designation D2625;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.1.Scope1.1 This test method(see Note 1)covers the determinationof the endurance(wear)life and load-carrying capacity of drysolid film lubricants in sliding steel-on-steel applications.NOTE1Reference may be made to Coordinating Research Council,Inc.(CRC)Report No.419,“Development of Research Technique forMeasuring Wear Life of Bonded Solid Lubricant Coatings for Airframes,Using the Falex Tester.”See also Military Specification MIL-L-8937(ASG),Jan.22,1963,and Methods 3807 and 3812 of Federal TestMethod 791a.1.2 The values stated in SI units are to be regarded as thestandard except where equipment is supplied using inch-poundunits and would then be regarded as standard.The metricequivalents of inch-pound units given in such cases in the bodyof the standard may be approximate.1.3 This standard does not purport to address all of thesafety concerns,if any,associated with its use.It is theresponsibility of the user of this standard to establish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use.2.Referenced Documents2.1 ASTM Standards:2B16/B16M Specification for Free-Cutting Brass Rod,Barand Shapes for Use in Screw MachinesF22 Test Method for Hydrophobic Surface Films by theWater-Break Test2.2 U.S.Military Specifications:3MIL-L-8937MIL-P-16232F Phosphate Coatings,Heavy,Manganese orZinc Base(for Ferrous Metals)2.3 Other Standards:442USC7671a Clean Air Act Amendments of 1990Federal Test Method 791a Methods 3807 and 38123.Terminology3.1 Definitions:3.1.1 dry solid film lubricantsdry coatings consisting oflubricating powders in a solid matrix bonded to one or bothsurfaces to be lubricated.3.2 Definitions of Terms Specific to This Standard:3.2.1 direct load,nthe load that is applied linearly,bisect-ing the angle of the vee block corrected to either the 800 lbf(3550 N)gauge reference or the 3000 lbf(13 300 N)gaugereference.3.2.1.1 DiscussionThis load is equivalent to the true loadtimes the cos 42.3.2.2 endurance(wear)lifethe length of test time beforefailure under a constant loaded condition,in minutes,in whichthe applied test lubricant performs its function.3.2.3 gauge load,nthe value obtained from the gaugewhile running the test after being corrected to the standardcurve using the calibration procedure for the 4500 lbf(20 000 N)reference gauge.3.2.3.1 DiscussionThe gauge reading is irrespective of theparticular gauge used,and corrections are made by comparisonto the Brinell ball impression diameters on a standard referencecopper test coupon with a Rockwell hardness range of HB 37to HB 39.An electronic calibration instrument5is availablewhich can be used in place of the copper coupon.1This test method is under the jurisdiction of ASTM Committee D02 onPetroleum Products,Liquid Fuels,and Lubricants and is the direct responsibility ofSubcommittee D02.L0.05 on Solid Lubricants.Current edition approved July 1,2015.Published July 2015.Originally approvedin 1967.Last previous edition approved in 2010 as D2625 94(2010).DOI:10.1520/D2625-94R15.2For 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.3Available from Standardization Documents Order Desk,DODSSP,Bldg.4,SectionD,700RobbinsAve.,Philadelphia,PA19111-5098,http:/dodssp.daps.dla.mil.4Available from U.S.Government Printing Office Superintendent of Documents,732 N.Capitol St.,NW,Mail Stop:SDE,Washington,DC 20401,http:/www.access.gpo.gov.5Trademark of and available from Falex Corp.,1020 Airpark Dr.,Sugar Grove,IL 60554.A new model of the Falex Pin and Vee Block Test Machine has beenavailable since 1983.Certain operating procedures are different for this new model.Consult instruction manual of machine for this information.If you are aware ofalternative suppliers,please provide this information to ASTM InternationalHeadquarters.Your comments will receive careful consideration at a meeting of theresponsible technical committee,1which you may attend.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 3.2.4 load carrying capacitythe highest indicated loadsustained for a minimum of 1 min.4.Summary of Test Method4.1 The endurance test(Procedure A)consists of runningtwo stationary steel vee block specimens lo