Designation:D8227−20StandardTestMethodforDeterminingtheCoefficientofFrictionofSynchronizerLubricatedbyMechanicalTransmissionFluids(MTF)UsingaHigh-Frequency,Linear-Oscillation(SRV)TestMachine1ThisstandardisissuedunderthefixeddesignationD8227;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope*1.1Thistestmethodcoversaprocedurefordeterminingthecoefficientoffrictionoflubricants(fluids)tribologicallyinter-actingwithmaterialsusedinsynchronizersinmechanicaltransmission(MT)gearsunderhigh-frequencylinear-oscillationmotionusingtheSRVtestmachine.Aflatarealcontactgeometryisapplied.1.2ThevaluesstatedinSIunitsaretoberegardedasstandard.Nootherunitsofmeasurementareincludedinthisstandard.1.3Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafety,health,andenvironmentalpracticesanddeter-minetheapplicabilityofregulatorylimitationspriortouse.1.4Thisinternationalstandardwasdevelopedinaccor-dancewithinternationallyrecognizedprinciplesonstandard-izationestablishedintheDecisiononPrinciplesfortheDevelopmentofInternationalStandards,GuidesandRecom-mendationsissuedbytheWorldTradeOrganizationTechnicalBarrierstoTrade(TBT)Committee.2.ReferencedDocuments2.1ASTMStandards:2D235SpecificationforMineralSpirits(PetroleumSpirits)(HydrocarbonDryCleaningSolvent)D5579TestMethodforEvaluatingtheThermalStabilityofManualTransmissionLubricantsinaCyclicDurabilityTestD5706TestMethodforDeterminingExtremePressurePropertiesofLubricatingGreasesUsingaHigh-Frequency,Linear-Oscillation(SRV)TestMachineD7421TestMethodforDeterminingExtremePressurePropertiesofLubricatingOilsUsingHigh-Frequency,Linear-Oscillation(SRV)TestMachineG40TerminologyRelatingtoWearandErosion2.2OtherStandards:DIN51631Special-boiling-point...
