ASTM_D_8227_-_20.pdf

Designation:D822720Standard Test Method forDetermining the Coefficient of Friction of SynchronizerLubricated by Mechanical Transmission Fluids(MTF)Usinga High-Frequency,Linear-Oscillation(SRV)Test Machine1This standard is issued under the fixed designation D8227;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 thecoefficient of friction of lubricants(fluids)tribologically inter-acting with materials used in synchronizers in mechanicaltransmission(MT)gears under high-frequency linear-oscillation motion using the SRV test machine.A flat arealcontact geometry is applied.1.2 The values stated in SI units are to be regarded asstandard.No other units of measurement are included in thisstandard.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,health,and environmental practices and deter-mine the applicability of regulatory limitations prior to use.1.4 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:2D235 Specification for Mineral Spirits(Petroleum Spirits)(Hydrocarbon Dry Cleaning Solvent)D5579 Test Method for Evaluating the Thermal Stability ofManual Transmission Lubricants in a Cyclic DurabilityTestD5706 Test Method for Determining Extreme PressureProperties of Lubricating Greases Using a High-Frequency,Linear-Oscillation(SRV)Test MachineD7421 Test Method for Determining Extreme PressureProperties of Lubricating Oils Using High-Frequency,Linear-Oscillation(SRV)Test MachineG40 Terminology Relating to Wear and Erosion2.2 Other Standards:DIN 51631 Special-boiling-point spiritsRequirements andtesting3DIN EN ISO 13565-2 Geometrical Product Specifications(GPS)Surface texture:Profile methodSurfaces hav-ing stratified functional propertiesPart 2:Height char-acterization using linear material ratio curve3DIN EN 170223 Heat treatment of ferrous materials;heattreatment methods;case hardening3CEC L-66-99 Evaluation of synchronizer loading param-eters and their ability to predict failure4GB/T 3077-2015 Alloy structural steel5YS/T 669-2013 Copper alloy tube of extruded product forsynchronizer rings6TL-VW084(1993)Kupfer-Zink-Legierungen Werkstoffanforderungen(Copper-Zinc alloysMaterial require-ments)73.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.L0.07 on Engineering Sciences of High Performance Fluids andSolids(Formally D02.1100).Current edition approved Dec.1,2020.Published December 2020.Originallyapproved in 2018.Last previous edition approved in 2018 as D8227 18.DOI:10.1520/D8227-20.2For 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 Beuth Verlag GmbH(DIN Deutsches Institut fr Normunge.V.),Burggrafenstrasse 6,10787 Berlin,Germany,http:/www.en.din.de4Available from Coordinating European Council(CEC),Services provided byKellen Europe,Avenue Jules Bordet 142-1140,Brussels,Belgium,http:/www.cectests.org.5Available from Standardization Administration of China,No.9 MadianDonglu,Haidian District,Beijing 100088,P.R.China.6Available as a standard of nonferrous industry from Standardization Adminis-tration of China,No.9 Madian Donglu,Haidian District,Beijing 100088,P.R.China.7Available from Volkswagen AG,corporate IP,post stop 1770,D-38346Wolfsburg,Germany,.*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.1both,which are uncharacteristic of the given tribologicalsystems long-term behavior.G403.1.2 carburization,ncarburizing is not defined in t