ISO TR 01281-1-2021.docx

TECHNICA1.REPORTISO/TR1281-1editionSecond2021-05Ro1.1.ingbearingsExp1.anatorynotesonISO281一Piqdynamic1.oadratingandbasicrating1.ifeRou1.ementsNotesexp1.icativesurISO281Partie1:Chargesdynamiquesdebaseetdur6enomina1.edebaseReferencenumberISO/TR1281-1.:2021(E)COPYRIGHTPROTECTEDDOCUMENT©ISO2021岫rkdea/山thUcdOthcnviscjft<c三orrtmcehDVBiwixuioiti08phnn11UatiocBhr<1.>hotoc<>p)Mng,ptbcatonpostingontheinternetoranintranet,withoutpriorwrittenpermission.PermissioncanherequestedfromeitherISOattheaddressbe1.owOr1.sOXSmemberbodyinthecountryoftherequester.%,tft晒Iandonnet8CH-1214*crnicr,GenevaPhone：M1.22749O1.11Pub1.ishedinSwitzerhndContentsForewordivI>troductionScopeNormativereferences_._TermsanddefinitionsSymbo1.sGenera1.Basicdynamic1.oadrating6.16.2Genera1.44Basicdynamicradia1.1.oadrating.Cr,forradia1.ba1.1.bearings.-ffi3dcdyii1.tausatia1.1.oabnp!Ttfi1trta(1.otft(Ktba1.1.bearings96.3.2 Thrustba1.1.bearingswithcontactang1.ea=90c9Basicdynamicaxia1.1.oadrating,Q,forthrustba1.1.bearingswithtwoormorerowsOfhaUsdynamicradia1.1.oadrating.Cr9forradia1.ro1.1.erbearings1013139I“”.三*”*-»"“-.“«-*«»-*«-"Basicdynamicaxia1.1.oadrating.Ciforsing1.erowthrustro1.1.erbearings6.6.1 Thrustro1.1.erbearingswithcontacta90o一6.799&dy翻RSF蝴回通P6&的百出怖群瞌齐演"Withnvoormore13rowsOfIao1.1.eInS-.>.*.<.14Djrnamicequiva1.ent1.oad167.1 Expressionsfordynamicequiva1.ent1.oad167.1.1 Theoretica1.dynamicequiva1.entradia1.1.oad,Pvfforsing1.erowradia1.bearings167.1.2 Theoretica1.dynamicequiva1.entradia1.1.oad,Pr1.fordoub1.eCQntaCtgr(11an由bfe11rigadiOba1.1.bearings.227.1.4 Practica1.expressionsfordynamicequiva1.entradia1.1.oad,Pr.forradia1.7.1.5 即沔I愉座如僦揪t遍研Kmi(三例entradia1.1.oad,PrJorradia1.ba1.1.22bearings257.1.6 Practica1.expressionsfordynamicequiva1.entaxia1.1.oad,P,forthrusthearings267.2 42AorsaMn荆HbCaringS287.2.2 Va1.uesofX1Yandeforeachtypeofradia1.ba1.1.bearing297.2.3 Tabu1.ationoffactorsXtYandeforradia1.ba1.1.bearings35%为taM1.KkWfi丫andedifferentfromstandard377.2.6 Radia1.ro1.1.erbearings3887.2.7Thrustro1.1.erbearings.39Basicrating1.ifeBib1.iographyForewordISO(theInternationa1.OrganizationforStandardization)isawor1.dwidefederationofnationa1.standardsthiiugh(ISOmdrmbni>RiVfS(vcekdHprapbrifigbodyIihicrttad6tandrijktf0tartedtaIcommitteehasbeenestab1.ishedhastherighttoberepresentedonthatcommittee.Internationa1.organizations,governmenta1.andnon-governmenta1.,in1.iaisonwithISO,a1.sotakepartinthework.ISOco1.1.aboratesc1.ose1.ywiththee1.ectrotechnica1.standardization.Internationa1.E1.ectrotechnica1.Commission(IEC)ona1.1.mattersofTheproceduresusedtodeve1.opthisdocumentandthoseintendedforitsfurthermaintenanceare蜘硼槛OfISoIEC(三te帆掖帆产%cordancetheeditoria1.ru1.esoftheISO/IECDirectives.Part2(secwww.iso.org/direc1.ives).Mionrigbtsd战丽n施腻飒脚SnSi曲?麻吸咻胸般眈doc映棉频湖H%subjectofanypatentrightsidentifiedduringthedeve1.opmerUW4io÷uwMM41.beintheIntroductionand/orontheISO1.istofpatentdec1.arationsreceived(seewww.iso.org/pa1.ents).Anytradeusedinthisconstitutenameendorsement.documentisinformationgivenfortheconvenienceofusersanddoesnotForanexp1.anationofthevo1.untarynatureofstandards,themeaningofISOspecifictermsandPXPTTTTnnTTTmTrPnTnzatoncoiso/foreword.hun1.赫福P奥盛腌和he喂煽商辆需带tion曲雇P干浮到瞬滕思幅Thisratingsand1.ife1.oaddocumentwas.preparedbyTechnica1.Committee1SOTC4,Ro1.1.inffbearings.SubcommitteeSC8,Thissecondeditioncance1.sandrep1.acestheTechnica1.Corrigendum1(ISOTR1281-1:2008/Cor1:2009)andthefirstedition(ISOTR1281-1:2008),whichhasbeentechnica1.1.yrevised.Themainchangescomparedtothepreriouseditionareasfo1.1.ows:s岫g&k1.M8RKT1.ftAJX(f产Sof缶6T1.Ry1.281或D的行ocEiW2008hasbeende1.eted,thisThederivationoftheo1.dFormu1.ae(29)and(46)Formu1.ae(28)and(45)inthiseditionhasbeencorrected.TypingerrorshavebeencorrectedinFormu1.ae(30)and(31)andinthederivationofthefactor丫3.A1.istofa1.1.partsintheISO/TR1281seriescanbefoundOntheISowebsite.Anyfeedbackorquestionsonthisdocumentshou1.dbedirectedtotheuser'snationa1.standardsbody.comp1.ete1.istingofthesebodiescanbefoundatvrww.iso.orgmembers.htm1.IntroductionISO/R281:1962IoadNationa1.StandardizingbearingsAssociationsp1.ace(ISA).WhenISAConfCrCnCC1.aStInternationa1.Federationofstandards.basicdefinitions1.oadcontained(nowessence"basicdynamic281：2007ratingtheconceptsdiscussionstheinitiativeofandAnti-FrictionStandardsManufacturersAssociation(AFBMA),NewYork,basis,bearings".bodyforSwedenpresented,inFebruary1950,afirstproposa1.toISO,"1.oadratingofmodifiedproposa1.ro1.1.erbearingba1.1.bearingsstandards,asproposa1.memberbodyro1.1.erbearings.subm>ttedaservingasamajorbasisforthesectionsregardingro1.1.erbearingrating.-49ISO28