ASTM_D_5707_-_11.pdf

Designation:D570711Standard Test Method forMeasuring Friction and Wear Properties of LubricatingGrease Using a High-Frequency,Linear-Oscillation(SRV)Test Machine1This standard is issued under the fixed designation D5707;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.1.Scope*1.1 This test method covers a procedure for determining alubricating greases coefficient of friction and its ability toprotect against wear when subjected to high-frequency,linear-oscillation motion using an SRV test machine at a test load of200 N,frequency of 50 Hz,stroke amplitude of 1.00 mm,duration of 2 h,and temperature within the range of the testmachine,specifically,ambient to 280C.Other test loads(10 to1200 N for SRVI-model,10 to 1400 N for SRVII-model,and10 to 2000 N for SRVIII-model),frequencies(5 to 500 Hz)andstroke amplitudes(0.1 up to 4.0 mm)can be used,if specified.The precision of this test method is based on the statedparameters and test temperatures of 50 and 80C.Average wearscar dimensions on ball and coefficient of friction are deter-mined and reported.NOTE1Optimol Instruments supplies an upgrade kit to allow SRVI/II-machines to operate with 1600 N,if needed.1.2 This test method can also be used for determining a fluidlubricants ability to protect against wear and its coefficient offriction under similar test conditions.1.3 The values stated in SI units are to be regarded asstandard.No other units of measurement are included in thisstandard.1.4 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:2A295/A295M Specification for High-Carbon Anti-FrictionBearing SteelD217 Test Methods for Cone Penetration of LubricatingGreaseD4175 Terminology Relating to Petroleum,PetroleumProducts,and LubricantsD5706 Test Method for Determining Extreme PressureProperties of Lubricating Greases Using a High-Frequency,Linear-Oscillation(SRV)Test MachineD6425 Test Method for Measuring Friction and Wear Prop-erties of Extreme Pressure(EP)Lubricating Oils UsingSRV Test MachineD7421 Test Method for Determining Extreme PressureProperties of Lubricating Oils Using High-Frequency,Linear-Oscillation(SRV)Test MachineE45 Test Methods for Determining the Inclusion Content ofSteelG40 Terminology Relating to Wear and Erosion2.2 Other Standards:3DIN EN ISO 683-17 Heat-treated Steels,alloy steels andfree-cutting steels Part 17:Ball and roller bearing steelsDIN 518343:200812 Testing of lubricants Tribologicaltest in translatory oscillation apparatus Part 3:Deter-mination of tribological behaviour of materials in coop-eration with lubricantsDIN EN ISO 13565-2:1998 Geometrical Product Specifica-tions(GPS)Surface texture:Profile method;Surfaceshaving stratified functional properties Part 2:Heightcharacterization using linear material ratio curve(replacesDIN 4776:1990:Measurement of surface roughness;pa-rameters RK,RPK,RVK,Mr1,Mr2for the description of thematerial portion)3.Terminology3.1 Definitions:3.1.1 break-in,nin tribology,an initial transition processoccurring in newly established wearing contacts,often accom-panied by transients in coefficient of friction or wear rate,or1This test method is under the jurisdiction of ASTM Committee D02 onPetroleum Products,Liquid Fuels,and Lubricants and is the direct responsibility ofSubcommittee D02.G0.04 on Functional Tests-Tribology.Current edition approved Dec.1,2011.Published March 2012.Originallyapproved in 1995.Last previous edition approved in 2011 as D570705(2011)1.DOI:10.1520/D5707-11.2For 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 Deutsches Institut fur Normung e.V.(DIN),Burggrafenstrasse 6,10787 Berlin,Germany,http:/www.din.de.*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 States1 both,which are uncharacteristic of the given tribologicalsystems long-term behavior.G403.1.2 coeffcient of friction,n in tribology,the dimension-less ratio of the friction force(F)between two bodies to thenormal force(N)pressing these bodies together.G403.1.3 Hertzian contact area,nthe apparent area of contactbetween two nonconforming solid bodies pressed against eachother,as calculated from Hertzs equations of elasticdeformation.G403.1.4 Hertzian contact pressure,nmagnitude of the pres-sure at any specified loca