1、A Referencenumbe r ISO13412:1997 (E) INTERNATIONAL STANDARD ISO 13412 Firstedition 19971215 AerospaceAirframeneedletrackroller, yoketype,singlerow,sealedInchseries AronautiqueetespaceGaletsdecameaiguillespourtrier, unerange,avecjoints,pourcelluledaronefSrieinchISO13412:1997(E) ISO1997 Allrightsreser
2、ved.Unlessotherwisespecified,nopartofthispublicationmaybereproducedorutilizedinanyformorbyan ymeans,electronic ormechanical,includingphotocopyingandmicrofilm,withoutpermissioninwritingfromthepublisher. InternationalOrganizationforStandardization Casepostale56 CH1211Genve20 Switzerland Internet centr
3、aliso.ch X.400 c=ch;a=400net;p=iso;o=isocs;s=central PrintedinSwitzerland ii Foreword ISO(theInternationalOrganizationforStandardization)isaworldwidefederationofnationalstandardsbodies (ISOmemberbodies).TheworkofpreparingInternationalStandardsisnormallycarriedoutthroughISOtechnical committees.Eachme
4、mberbodyinterestedinasubjectforwhichatechnicalcommitteehasbeenestablishedhas therighttoberepresentedonthatcommittee.Internationalorganizations,governmentalandnongovernmental,in liaisonwithISO,alsotakepartinthework.ISOcollaboratescloselywiththeInternationalElectrotechnical Commission(IEC)onallmatters
5、ofelectrotechnicalstandardization. DraftInternationalStandardsadoptedbythetechnicalcommitteesarecirculatedtothememberbodiesforvoting. PublicationasanInternationalStandardrequiresapprovalbyatleast75%ofthememberbodiescastingavote. InternationalStandardISO13412waspreparedbyTechnicalCommitteeISO/TC20, A
6、ircraftandspacevehicles , SubcommitteeSC15, Airframebearings . AnnexAformsanintegralpartofthisInternationalStandard.AnnexBisforinformationonly. ISO ISO13412:1997(E) iii Introduction AtthetimethisInternationalStandardwasdeveloped,theimperialunitssizesofairframeneedlerollerbearingswere dominantinworld
7、application.ThebasisforthisInternationalStandardistheimperialunitsprovidedinannexB.INTERNATIONALSTANDARD ISO ISO13412:1997(E) 1 AerospaceAirframeneedletrackroller,yoketype,singlerow, sealedInchseries 1Scope ThisInternationalStandardspecifiesthecharacteristics,boundarydimensions,tolerances,internalcl
8、earancesand permissiblestaticradialloadsofinchseries,singlerow,yoketype,needletrackrollersusedinairframeapplications. TheairframeneedletrackrollerscoveredbythisInternationalStandardaredesignedtooperateinthetemperature range54Cto+121C. 2Normativereferences Thefollowingstandardscontainprovisionswhich,
9、throughreferenceinthistext,constituteprovisionsofthis InternationalStandard.Atthetimeofpublication,theeditionsindicatedwerevalid.Allstandardsaresubjectto revision,andpartiestoagreementsbasedonthisInternationalStandardareencouragedtoinvestigatethepossibility ofapplyingthemostrecenteditionsofthestanda
10、rdsindicatedbelow.MembersofIECandISOmaintainregistersof currentlyvalidInternationalStandards. ISO68317: 1) , Heattreatedsteels,alloysteelsandfreecuttingsteelsPart17:Ballandrollerbearingsteels. ISO1132:1980, RollingbearingsTolerancesDefinitions. ISO2082:1986, MetalliccoatingsElectroplatedcoatingsofca
11、dmiumonironorsteel. ISO28591: 2) , SamplingproceduresforinspectionbyattributesPart1:Samplingplansindexedbyacceptable qualitylevel(AQL)forlotbylotinspection. ISO4520:1981, Chromateconversioncoatingsonelectroplatedzincandcadmiumcoatings. ISO5593:1997, RollingbearingsVocabulary. ISO6158:1984, Metallicc
12、oatingsElectroplatedcoatingsofchromiumforengineeringpurposes. ISO13411:1997,Aerospace Airframeneedleroller,cylindricalrollerandtrackrollerbearings Technical specification. AMS2417E:1993, Plating,zincnickelalloy. 3) 1) Tobepublished.(RevisionofISO68317:1976) 2) Tobepublished.(RevisionofISO28591:1989)
13、 3) Availablefrom: SAEInternational 400CommonwealthDrive Warrendale,PA150960001 USAISO13412:1997(E) ISO 2 3Definitions ForthepurposesofthisInternationalStandard,thedefinitionsgiveninISO5593apply. 4Symbols 4.1ForthepurposesofthisInternationalStandard,thesymbolsgiveninISO1132apply.Thesymbols(excepttho
14、se fortolerances)showninthefiguresandthevaluesgiveninthetablesdenotenominaldimensionsunlessspecified otherwise. 4.2ThefollowingadditionalsymbolsforbearingscoveredbythisInternationalStandardalsoapply. B overallwidth(overfacesofendwashers) C s permissiblestaticradialload d a clampingfacediameter R cro
15、wnradiusofouterring 5Requiredcharacteristics 5.1DimensionsTolerancesInternalclearancesLoads Forvalues,seetable1.Forconfiguration,seefigure1. Table1 Dimensionsinmillimetres, toleranceandclearancevaluesinmicrometres Diameter dDBC Tolerancevalues Rr s d a Internal clearance C s Mass code 0 -254 0 -381
16、D dmp K ia max. D Dmp K ea max. min. min. min. Radial, G r max. Axial, G a max. kN kg 03 4,826 19,05 7,93 7,12 11,2 5,34 0,01 04 6,35 22,225 9,53 8,77 254 0,55 13,2 8,49 0,02 06 9,525 26,988 12,7 11,56 17,1 16 0,05 08 12,7 33,338 15,88 14,74 318 21,5 25,7 0,08 10 15,875 38,1 19,05 17,91 444 24,3 37,
17、8 0,13 12 19,05 44,45 25,4 24,13 635 28,2 46 63,1 0,24 14 22,225 50,8 28,58 27,31 0 -18 25 +25 -25 41 698 31 635 85,8 0,34 20 31,75 63,5 31,75 30,48 762 41,3 112,5 0,53 24 38,1 76,2 0,81 50,8 168,5 1,07 28 44,45 87,312 58 196,1 1,23 32 36 50,8 57,15 98,425 109,538 38,1 36,58 1524 65,1 72,7 217,5 244
18、,6 1,55 1,92 40 63,5 120,65 79 51 266,4 2,33 44 69,85 127 85 288,2 2,49 ISO ISO13412:1997(E) 3 Key 1 Lubricationgroove 2 Lubricationgrooveandholes Figure1 5.2Surfaceroughness Rollers: R a =0,2 mmmax. Innerringraceway: R a =0,4 mmmax. Outerringraceway: R a =1,0 mmmax. Endwashers: R a =1,6 mmmax.atrol
19、lercontactarea 6Materials Rings: bearingsteelISO68317,type1,racewayhardness58HRCto66HRC(670HVto860HV). Rollers: bearingsteelISO68317,type1,heattreatedto58HRCto66HRC(670HVto860HV). Endwashers: steelheattreatedto51HRCto60HRC(528HVto697HV)atrollercontactarea. Seals: acetalresin,nylonorequivalent. 7Surf
20、acetreatment 7.1Bearingsmadeofconventionalrollingbearingsteel,shallhavetheexternalsurfacesoftheouterringchromium plated,andallotherexternalsurfaces,excepttheinnerringboresurface,shallbecadmiumorzincnickelplated. Blackoxidecoatingisapermissiblealternateonallinnerringexternalsurfaces(seeannexA). 7.2Wh
21、erecadmiumplatingisspecified(codelettersDandM),itshallbeinaccordancewithISO2082.Thethickness oftheplatingshallnotbelessthan7 mmandnotmorethan15 mm.ThebearingshallbeembrittlementrelievedwithinISO13412:1997(E) ISO 4 4hofplatingbyheattreatmentat(14010)Cforaminimumof8hfollowedbychromatetreatmentinaccord
22、ance withISO4520(codeletterDonly). 7.3Wherechromiumplatingisspecified(codelettersD,MandZ),itshallbeinaccordancewithISO6158.The thicknessoftheplatingshallbenotlessthan12 mm,8 mmonfacesandringchamfers,andnotmorethan25 mm. 7.4Wherezincnickelplatingisspecified(codeletterZ)itshallbeinaccordancewithAMS241
23、7E,type2.The thicknessoftheplatingshallnotbelessthan7 mmandnotmorethan15 mm. 8Lubrication ThebearingshallbeprelubricatedwitheithergreaseAorB,asspecifiedbythecustomer. NOTEDescriptionsofgreaseAandgreaseBaregiveninISO13411:1997,annexI. 9Designation BearingscoveredbythisInternationalStandardshallbedesi
24、gnatedonlyinthemannershowninthefollowing example: wherethefollowingcodesareapplied: greases: A=estertypegrease; B=synthetichydrocarbontypegrease; materials/surfacetreatments: D=material:lowalloybearingsteel; surfacetreatment:outerringchromiumplated; washercadmiumplatedwithchromateconversioncoating;
25、innerringcadmiumplatedwithchromateconversioncoating,orblackoxidecoated; M=material:lowalloybearingsteel; surfacetreatment:outerringchromiumplated; washercadmiumplatewithoutchromateconversioncoating; innerringcadmiumplatedwithoutchromateconversioncoating,orblackoxidecoated; Z=material:lowalloybearing
26、steel; surfacetreatment:outerringchromiumplated; washerzincnickelplated; innerringzincnickelplated,orblackoxidecoated. ISO ISO13412:1997(E) 5 10Identificationmarking Inadditiontothemanufacturersnameortrademark,eachbearingshallbepermanentlyandlegiblymarked,usingthe identityblockasdefinedinclause9.Mar
27、kingpositionandmethodshallbeatthemanufacturersoption. 11Technicalspecification AirframeneedletrackrollerssuppliedtothisInternationalStandardshallconformtotherequirementsofISO13411.ISO13412:1997(E) ISO 6 AnnexA (normative) Blackoxidecoating A.1Introduction Theserequirementscoverblackoxidecoatingsappl
28、iedtobearingrings. A.2Requirements A.2.1Materials Thematerialsfortheblackeningprocessesshallbeselectedbythecontractor.Theselectedmaterialsshallresultin blackcoatingsmeetingalltheapplicablerequirementsofthisannex. A.2.2Preparationofbasismetal Priortotheapplicationoftheblackcoatings,thebasismetalshall
29、bethoroughlycleanedwithmaterialsandmethodsat theoptionofthecontractor.Thecleaningprocessshallbeperformedwithoutmeasurableabrasionorerosion.The cleanedsurfacesshallbefreeofrust,scale,grease,oil,paintorotherforeignmatter. A.2.2.1Stressrelieftreatment Allringswhicharecoldformedorwhichcontainresidualten
30、silestress,suchasmaybeproducedbycold straightening,shallbegivenastressrelief.Thestressreliefmaybeconductedbeforeoraftercleaningandcoatingat thediscretionofthecontractor. A.2.2.2Coatingasafinalprocess Unlessotherwisespecified,theblackcoatingsshallbeappliedafterallmachiningandheattreatmenthavebeen acc
31、omplished. A.2.3Applicationofblackcoatings Thespecifiedblackcoatingshallbeappliedundercontrolledtimeandtemperatureconditions.Allequipment,together withsolutionsorbaths,shallbeproperlymaintainedandkeptfreeofdirtorpossiblecontaminants. A.2.3.1Effectonmechanicalproperties Theselectedprocessshallnotredu
32、cethehardnessoftheringsbeingprocessedorexposetheringstotemperatures inthetemperbrittlerangeofthematerial,norshallitcauseembrittlementofthesteel. A.2.3.2Surfaceattack Theprocessshallnotresultinanyattackofthesurface,eitherpittingorintergranular.Duringprocessing,daily determinationforthisbehaviourshall
33、bemadeusingamicroscopicmethodandexaminedatamagnificationwhichwill clearlyestablishthecondition.Ringswithpittedsurfacesorshowingintergranularattackshallberejected. A.2.4Alkalineoxidizingsolutions Oxidecoatingsshallbeformedfromaboilingalkalineoxidizingsolution. ISO ISO13412:1997(E) 7 A.2.4.1Rinsing Bl
34、ackoxidecoatedringsshallberinsedimmediatelyafterprocessinginastagnantwarmrinseat60Cto88C followedbythoroughcoldwaterrinsingtoeffectcompleteremovaloftheblackeningsolution. A.2.4.2Chromicaciddip Afterthecoldrinse,theringsshallbedippedforaminimumof30sina0,06percentsolutionofchromicacid(240cc chromicaci
35、dper380lofwater)maintainedatatemperatureof66Cto88CandapHof2to3.Afterthechromic aciddip,partsshallbedriedwithoutfurtherrinsingbyusingwarmdryair. A.2.4.3Alternatedip Duetohazardouswasteresultingfromtheuseofchromicacid,analternatedipprocessmaybeusedattheoptionof thecontractorprovideditsufficientlyneutr
36、alizesanyresidualsfromthecoatingprocess. A.2.5Coverageandcolour Coatingsshallcoverthebasismetalcompletelyandpassthesmuttest.Colourshallbeauniformblack.Aslight amountofsmut,whichisinherentintheprocess,shallnotbecauseforrejection.Thereshallbenoindicationofany reddishbrownorgreensmutwhentested(seeA.3.3
37、.1).Smut“spottiness“shallbeclassifiedasunsatisfactory requiringreprocessing. A.2.6Qualityofcoating(oxalicacidspottest) Theblackoxidecoatingspriortotheapplicationofapreservativeshallpasstheoxalicacidspottestforgoodquality coating(see3.3.2). A.2.7Treatmentofhighstrengthsteel Whenspecified,ringsshallbe
38、bakedat(19114)Cforthreehoursormoreorgivenanequivalentembrittlement relieftreatmentafterapplicationoftheoxidecoating.Whenspecifiedbytheprocuringactivity,highstrengthsteelparts shallbetestedforembrittlementrelief(seeA.3.3.3).Ifanembrittlementreliefbakeisrequired,itshallfollowthe chromicaciddiporaltern
39、atedip. A.3Qualityassurance A.3.1Responsibilityforinspection Unlessotherwisespecifiedinthecontractorpurchaseorder,thesupplierisresponsiblefortheperformanceofall inspectionrequirementsofthisannex.Exceptasotherwisespecified,thesuppliermayutilizehisownfacilitiesorany commercialfacilityforinspections. A
40、.3.2Sampling ThesinglesampleplanfornormalinspectionoftheclassificationofdefectsshallbeinaccordancewithISO28591. A.3.2.1Samplefornondestructivetests(visualinspection,coverage,colour,smutandworkmanship) SamplesshallbeselectedatrandomfromeachinspectionlotinaccordancewithISO28591,inspectionlevelIIand ac
41、ceptablequalitylevel(AQL)equalto1%defective. A.3.2.2Samplingfordestructivetests(oxalicacidspottest) SamplesshallbeselectedatrandomfromeachinspectionlotinaccordancewithISO28591,inspectionlevelIIand acceptablequalitylevel(AQL)equalto1%defective.ISO13412:1997(E) ISO 8 A.3.3Testmethods A.3.3.1Smuttest T
42、hetestshallbemadepriortotheapplicationofanycorrosionpreventativecompoundoraftervapourdegreasing. Blackoxidecoatedringsshallbevisuallyinspectedunderstronglighttoassureasatisfactoryappearance.Each sampleshallalsobewipedwithacleanwhiteclothforindicationsofsmut(seeA.2.5).Aslightamountofsmutwhichis inherentintheprocessisacceptableandshallnotbecauseforrejection. A.3.3.2Oxalicacidspottest Theblackoxidecoatedrings,priortotheapplicationofapreservative,shallbehandledwithcleancottonglovesor equivalent.Eachsampleshallhavedeposited,ononeflatspotofbla
