Designation:F1436−11AnAmericanNationalStandardStandardGuideforCenterServingDiameterDimensionsforArcheryBowStrings1ThisstandardisissuedunderthefixeddesignationF1436;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thisguidecoverstheformulationofpreliminaryguide-linesfortheoutsidediameterdimensionsofthecenterservingsfortheshootingstringsforarcherybows.1.2Thevaluesstatedininch-poundunitsaretoberegardedasthestandard.Thevaluesgiveninparenthesesareforinformationonly.2.Terminology2.1DefinitionsofTermsSpecifictoThisStandard:2.1.1bowstring,n—specialmulti-strandcordthatspansanarcherybowfromendtoendandisusedtoengagetherearendofanarrowinordertolaunchitintoflight.2.1.2bowstringmaterial,n—strandsofvariousmaterials,bothnaturalandsynthetic,fromwhichbowstringsaremade.2.1.2.1Discussion—Mostbowstringstodayaremanufac-turedfromsyntheticmaterialsthathavesuperiorstrengthandresistancetowearandatmosphericconditions.Differenceinthetensilestrengthofthematerialsisresponsibleforadifferenceinthesizeandnumberofthestrandsinabowstring.Inaddition,differenceintheforcenecessarytodrawvariousbowsmaydictatevaryingnumbersofstrandsofagivenmaterialtoprovideadequatestrengthforsatisfactoryservice.Thematerialusedforwrappingtocreateacenterservingisavailableinseveralsizesordiameters.This,combinedwithvariationinthenumberofstrandsusedtomakethemainstring,permitsadjustmentoftheoutsidediameterofthecenterservingwithinreasonablelimitssothatstandardizationispractical.2.1.3centerserving,n—wrappingoftwistedorbraidedline,ormonofilamentmaterial,thatisplacedonthebowstringnearitscenter.2.1.3.1Discussion—Thiswrappingcoverstheareawherethenockofthearrowengagesthebowstring.Itisusedtoresisttheabrasivewearofrepeatedshotsandalsotoprovideaproperfitwiththeslotofthenock.2.1.4drawweightofthebow,n—peakormaximumfor...
