SAE-J2432-2012-Performance-Testing-of-PK-Section-V

__________________________________________________________________________________________________________________________________________SAETechnicalStandardsBoardRulesprovidethat:“ThisreportispublishedbySAEtoadvancethestateoftechnicalandengineeringsciences.Theuseofthisreportisentirelyvoluntary,anditsapplicabilityandsuitabilityforanyparticularuse,includinganypatentinfringementarisingtherefrom,isthesoleresponsibilityoftheuser.”SAEreviewseachtechnicalreportatleasteveryfiveyearsatwhichtimeitmayberevised,reaffirmed,stabilized,orcancelled.SAEinvitesyourwrittencommentsandsuggestions.Copyright©2012SAEInternationalAllrightsreserved.Nopartofthispublicationmaybereproduced,storedinaretrievalsystemortransmitted,inanyformorbyanymeans,electronic,mechanical,photocopying,recording,orotherwise,withoutthepriorwrittenpermissionofSAE.TOPLACEADOCUMENTORDER:Tel:[phone](insideUSAandCanada)Tel:[phone](outsideUSA)Fax:[phone]Email:[e-mail]:://(R)PerformanceTestingofPKSectionV-RibbedBeltsRATIONALEThislatestrevisionofSAEJ2432accomplishesthefollowing:•Accelerationofdurabilitytestingconsistentwithmoredurablebeltcompoundsavailableinthemarket.•Eliminationofredundantteststhatidentifythesamefailuremodes.•Amorestringentnoisetestconsistentwithquieterbeltcompoundsavailableinthemarket.•Generalreviewandmodificationsfortestconsistency,clarification,andimprovedmethodology.1.SCOPEThefollowinginformationcoversaccessorydrivebelttestingmethodsandincludestestconfigurations,pulleydiameters,powerloads,andguidanceforinterpretingtestdata.Beltconstructiondefinitionsarealsodocumented.Thisinformationhasbeenpreparedfromexistingliterature,includingstandardsanddatasuppliedbyProducersandUsersofV-ribbedbelts.1.1PurposeThisSAEStandardisintendedtoprovidemethodstoevaluatetheperformanceofV-ribbedbeltconstructions.1.2TestSampleSizeThenumberoftestsamplesshouldbeagreedbetweeneachProducerandUser.1.3TestConditionsAnyvariationorchangeinthetestconditionsoutlinedinthisspecificationmustbeagreedbetweentheProducerandUser.SAEJ2342RevisedNOV2012Page2of281.4BeltTestLengthsThetestbeltlengthis1200mm±10mm.Testdatafrombeltsofthislengthwillbeconsideredvalidforallbeltlengthsofthesameconstructionandspecification.1.5DefinitionofConstructionSpecificationThebeltProducer'stestdataonbeltsofacertainconstructionshallbeconsideredvalidforevaluationofallbelts,withrespecttotheProducer'scrosssectiondimensions,materialspecifications,andmethodofmanufacture.1.6PulleyConstructionUnlessotherwisespecified,allpulleysusedontestfixturesshouldbemachinedsteelpulleys.1.7PulleyTolerancesPulleysshouldbemanufacturedtoSAEmeasurementpulleytolerancesasshowninSAEJ1459,exceptdiameteroverballs(DOB)tolerancemustbeheldto±0.1mmandthegrooveanglesmustbeheldto±0.5degrees.1.8Definitions1.8.1Profiled(Cut/Ground)Beltsa.Riblayer-Outerlayerofbelttypicallyincontactwithpulleygrooves.Theriblayerconsistsofrubbermixedwithfiber.Ribsmaybeononesideorbothsidesofthebelt.Theriblayerprovidesthefrictiontocarrytheloadbetweentheaccessoryandthebelt.b.Adhesionlayer(s)-Interiorlayer(s)ofmaterialbetweenthecordandadjacentlayers.Itspurposeistoprovideabondbetweenindividualcords,thecordlayer,andadjacentlayers.Itcanbeononesideofthecord,bothsidesofthecord,ornotpresentatall.c.Cordlayer-Interiorlayerconsistingofindividualstrandsofyarnthatcarrythetensileloadonthebelt.Thecordlayerdefinesthetensilemodulusofthebelt.d.Backlayer-Outerlayerofbeltmaterialoppositeoftheriblayer.Thebacklayerhasnoribprofile.Thepurposeofthebacklayeristoprovidearunningsurfaceforroutingpulleysandmayalsoprovidefrictiontocarrytheloadbetweenflatpulleysandthebelt.Thebacklayeralsoprovidessupportforthecordlayer.e.Fabriclayer-Optionalinternalorexternaltothebacklayerofthebelt.Typicallyusedtoprovidesupportforthecordlayer.1.8.2MoldedBelts-otherwisesameasprofiledbeltswiththeexceptionof:a.Riblayer-Outerlayerofbeltmaterialtypicallyincontactwiththepulleygrooves.Formoldedbelts,theriblayerconsistsofafiberfreerubberribcrosssectionwithasurfacelayerfornoiseabatement.Thesurfacelayercanbeafabricsheet,gluedonflock,apolymersheet,acellulosesheet,rubber,orpotentiallyothertreatments.SAEJ2342RevisedNOV2012Page3of28FIGURE1-BELTCROSS-SECTION2.REFERENCES2.1ApplicableDocumentsThefollowingpublicationsformapartofthisspecificationtotheextentspecifiedherein.Unlessotherwiseindicated,thelatestissueofSAEpublicationsshallapply.SpecificationSAEJ2432shallprevailintheeventofanyconflictrelativetobelttestingbetweenthepublicationsbelowandSpecificationSAEJ2432.2.2SAEPublicationsAvailablefromSAEInternational,400CommonwealthDrive,Warrendale,PA15096-0001,Tel:[phone](insideUSAandCanada)or724-776-4970(outsideUSA),