Designation:D7420−11StandardTestMethodforDeterminingTribomechanicalPropertiesofGreaseLubricatedPlasticSocketSuspensionJointsUsingaHigh-Frequency,Linear-Oscillation(SRV)TestMachine1ThisstandardisissuedunderthefixeddesignationD7420;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.INTRODUCTIONThistestmethodwasoriginallypublishedasbilingualcompanystandardTRW62051301inJune2002.TRWFahrwerksysteme2transferredthecopyrightonOct.5,2004tostandardizationbodies.TheDIN51834workinggrouphasmodifiedthisstandardbyaddingprecisioninformationbasedonroundrobintests.1.Scope*1.1Thistestmethodcoversaprocedurefordeterminingthefrictionandwearbehaviorofgreaselubricatedplasticsocketsuspensionjoints,forvalidationofsuspensionjointgreasesandqualityinspectionforthosegreasesunderhigh-frequencylinear-oscillationmotionusingtheSRVtestmachine.1.2ThevaluesstatedinSIunitsaretoberegardedasstandard.Nootherunitsofmeasurementareincludedinthisstandard.1.3Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.2.ReferencedDocuments2.1ASTMStandards:3A295SpecificationforHigh-CarbonAnti-FrictionBearingSteelD217TestMethodsforConePenetrationofLubricatingGreaseD4175TerminologyRelatingtoPetroleum,PetroleumProducts,andLubricantsD5706TestMethodforDeterminingExtremePressurePropertiesofLubricatingGreasesUsingaHigh-Frequency,Linear-Oscillation(SRV)TestMachineE45TestMethodsforDeterminingtheInclusionContentofSteelG40TerminologyRelatingtoWearandErosion2.2DINStandards:4DIN51631:1999Special-boiling-pointspirits-Require-mentsandtestingDINEN10025-1:2005Hotrolledproductsofstructuralsteels-Part1:GeneraltechnicaldeliveryconditionsDINENISO683-17H...
