Designation:F2730/F2730M−14StandardSpecificationforSiliconNitrideCylindricalBearingRollers1ThisstandardisissuedunderthefixeddesignationF2730/F2730M;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thisspecificationcoverstheestablishmentofthebasicquality,physical/mechanicalproperty,andtestrequirementsforsiliconnitriderollersClassesI,II,andIIItobeusedforcylindricalrollerbearings.1.2ThevaluesstatedineitherSIunitsorinch-poundunitsaretoberegardedseparatelyasstandard.Thevaluesstatedineachsystemarenotexactequivalents;therefore,eachsystemmustbeusedindependentlyoftheother.Combiningvaluesfromthetwosystemsmayresultinnonconformancewiththespecification.2.ReferencedDocuments2.1OrderofPrecedence:2.1.1Intheeventofaconflictbetweenthetextofthisdocumentandthereferencesherein,thetextofthisdocumenttakesprecedence.Nothinginthisdocument,however,super-sedesapplicablelawsandregulationsunlessaspecificexemp-tionhasbeenobtained.2.2ASTMStandards:2C1161TestMethodforFlexuralStrengthofAdvancedCeramicsatAmbientTemperatureC1421TestMethodsforDeterminationofFractureTough-nessofAdvancedCeramicsatAmbientTemperature2.3ASMEStandard:3B46.1SurfaceTexture(SurfaceRoughness,Waviness,andLay)2.4JISStandards:4R1601TestingMethodforFlexuralStrength(ModulusofRupture)ofHighPerformanceCeramicsR1607TestingMethodforFractureToughnessofHighPerformanceCeramics2.5CENStandards:5EN843-1AdvancedTechnicalCeramics—MonolithicCeramics—MechanicalPropertiesatRoomTemperature,Part1,DeterminationofFlexuralStrengthENV843-5AdvancedTechnicalCeramics—MonolithicCeramics—MechanicalPropertiesatRoomTemperature,Part5,StatisticalAnalysis2.6ISOStandard:6Hardmetals-Metallographicdeterminationofporosityanduncombinedcarbon3.Terminology3.1DefinitionsofTermsSpecifictoThisStandard:3.1.1ceramicsecondphase,n—sinteringadditivebasedp...
