Designation:D4693−07(Reapproved2012)StandardTestMethodforLow-TemperatureTorqueofGrease-LubricatedWheelBearings1ThisstandardisissuedunderthefixeddesignationD4693;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thistestmethodcoversthedeterminationoftheextenttowhichatestgreaseretardstherotationofaspecially-manufactured,spring-loaded,automotive-typewheelbearingassemblywhensubjectedtolowtemperatures.Torquevalues,calculatedfromrestraining-forcedeterminations,areameasureoftheviscousresistanceofthegrease.Thistestmethodwasdevelopedwithgreasesgivingtorquesoflessthan35N·mat−40°C.1.2ThevaluesstatedinSIunitsaretoberegardedasstandard.Nootherunitsofmeasurementareincludedinthisstandard.1.3WARNING—Mercuryhasbeendesignatedbymanyregulatoryagenciesasahazardousmaterialthatcancausecentralnervoussystem,kidneyandliverdamage.Mercury,oritsvapor,maybehazardoustohealthandcorrosivetomaterials.Cautionshouldbetakenwhenhandlingmercuryandmercurycontainingproducts.SeetheapplicableproductMa-terialSafetyDataSheet(MSDS)fordetailsandEPA’swebsite—http://www.epa.gov/mercury/faq.htm—foraddi-tionalinformation.Usersshouldbeawarethatsellingmercuryand/ormercurycontainingproductsintoyourstateorcountrymaybeprohibitedbylaw.1.4Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.2.ReferencedDocuments2.1ASTMStandards:2D217TestMethodsforConePenetrationofLubricatingGreaseD1403TestMethodsforConePenetrationofLubricatingGreaseUsingOne-QuarterandOne-HalfScaleConeEquipmentD3527TestMethodforLifePerformanceofAutomotiveWheelBearingGreaseD4175TerminologyRelatingtoPetroleum,PetroleumProducts,andLubricantsE1Specificatio...
