ASME_B18.8.8M-1994.pdf

Fax:062084389Aug29200115:38P.01l06PINSHEADED CLEVIS PINS METRIC SERIESIFf NOTES:1.ASMEB18.8.8M isastandarddevelopedthroughtheproceduresofTheAmericanSocietyofMechanical Engineers.81B.8.8M isunderthejurisdictionofASMEStandards Committee818andis thedirectresponsibilityofSubcommittee8.2.AppendixA,CalculationforHole Location,andreferencedstandardshavebeenomitted.Forthisinformation,refertothecompleteBt8.8.8M.Allparagraphsarenumberedidenticallytothosein thestandard.3.ASMEB18.8.8M-1994isreprintedwithpermissionofitspublisher,TheAmericanSocietyofMechanicalEngineers,ThreeParkAvenue,NewYork,NY10016-5990,U.S.A.ASMEB18.8.8M1994I1.INTRODUCTORY NOTES1.1Scope1.1.1This standard covers the complete di-mensional and general data for two types,AandS,of metric series headed clevis pins in-tended for general applications and recognizedas American National Standard.Type A headed clevis pins are withoutholes.TypeBheadedclevispinsspecifiedherein are with holes intended for use with cot-terpins.However,ameansisprovidedtospecify other hole sizes when required for usewithother types of pins.1.1.2The inclusion of dimensional data in thisstandard is not intended to imply that all sizesdescribed are production stock items.Consum-ers shouldconsultwlthsuppliers concerning listsof stock production items.1.2ComparisonWithISO 2341-1986Unhardened steel clevis pins producedto this standard are functionally interchangeablewith pins of the same nominal size which con-form to ISO 2341-1986,Clevis Pins With Head.Many of the recommended hole spacings in thisstandard provide greater lengths from the holesto the ends of the pins than the minimums speci-fied in ISO 2341-1986.1.3Dimensions1.3.1All dimensions in this standard are inmillimeters(rnrn),and apply before any coat-ing,unless stated otherwise.1.3.2Symbols specifying geometric character-istics are in accordance with ANSI Y14.5M,Di-mensioningandTolerancing.1.3.3Symbols specifying surface texture arein accordance with ANSI Y14.36,Surface Tex-ture Symbols.1.4TerminologyFor definitions of terms relating to fas-teners or component features thereof used inthis standard,refer to ASME B18.12,Glossaryof Terms for Mechanical Fasteners.See pageK-37.J-32Fax:062084389Aug29200115:38P.02/06ASMEB18.8.8M1994HEADED CLEVIS PINS METRIC SERIESPINSt51.5Referenced Standards2.GENERAL DATA(IFI Note:Titlesandsourcesofavail-abilityofreferencedstandardsaregivenonpageK-41.)1.6DesignationPins conforming to this standard shallbe designated by the following data,preferablyin the sequence shown:(a)product name;(b)ASMEdocument number;(e)TypeAorB,preceded by dash;(d)nominal shank diameter,D,preceded bya dash;(e)diameter tolerance class,ifother thanstandard;(fJnominal pin length,L,preceded byx;(9)for Type 6,hole size,01if other than stan-dard preceded byx;(h)for Type 8,head to hole center,Lh,pre-cededby x;(J)material,hardenedifrequired,precededbydash;(j)finish,if other rust preventive lubricant,preceded by dash.Examples:Headed Pin818.8.8M-B-20 x 100 x90-Steel-Zinc Plated per ASTM B633Fe/Zn5Type II.Headed Pin B18.8.8M-B-20 x 100 x 6.3x 89.5-Steel,Case Hardened.2.1Shank DiameterUnless otherwise specified,the shankdiameter,D,shall be within the limits specifiedin Table 1.The surface roughness of the shankshall not exceed3.2micrometers(pm)arithmeti-cal average in accordance with ANSJlASME846.1,Surface Texture.The standard shankdiameter limits specifiedinTable 1 are in accor-dance with toleranceclassh11of ANSI84.2,Preferred Metric Limits and Fits.If,in specialcases,other shank diameter limits are required,theyshould be selected from ANSI84.2;Le.,tolerance class a11,c11,or f8.2.2Head2.2.1Top of Head.The top of the head shallbe flat and chamfered or rounded at the periph-ery.2.2.2Bearing Surface.The bearing surfaceof the head,within a diameter equal to0:8timesthe maximum head diameter,Okshall be flatand perpendicular to the axis of the shank,de-termined over a length under the head equal tothe nominal shank diameter,within the circularrunout,t.,specified in Table 1.2.2.3HeadPeriphery.The periphery of thehead shall be within the circular runout,t2,de-termined over a length under the head equal tothe nominal shank diameter.2.3Pin LengthThe pin length,L,is the distance,paral-lel to the shank axis,from the bearing surfaceof the head to the end of the point.The stan-dard nominal pin lengths are specified in Table2.The tolerances on pin length are specified inTable 3.J-33Fax:0620S4389.Aug29.2ooi.is:39.P.03i66PINSHEADED CLEVIS PINS METRIC SERIES:JrtARASME818.8.8M1994oI-A-IBreak cornersOptional(See Para.2.5)Table1DimensionsofTypesAandBHeadedClevisPinsDDkKERt,t.D0,pHeadHeadShankHeadHeadChamlerFilletBearingPeripheryPointHoleDiameterDiameterHeightor RadiusRadiusSurfaceCircularDiameterDiameterRunoutNomMaxMinMaxMinMaxMinApproxNomMaxMaxMaxMinNomMaxMin33.002.945.004.701.2080.50.60.140.602.21.80.80940.8044.0003.9256.005.701.20.80.50.60.170.603.22.811.141.0055.0004.9258.007.641.81.410.60.220.723.32.71.21341.2066.0005.92510.009.642.21.810.60.280.724.33.71.