SP 46 (2003): Engineering Drawing Practice for Schools and ...

1 Disclosure to Promote the Right To InformationWhereas the Parliament of India has set out to provide a practical regime of right to information for citizens to secure access to information under the control of public authorities, in order to promote transparency and accountability in the working of every public authority, and whereas the attached publication of the Bureau of Indian Standards is of particular interest to the public, particularly disadvantaged communities and those engaged in the pursuit of education and knowledge, the attached public safety standard is made available to promote the timely dissemination of this information in an accurate manner to the public.

2 ! $ ' + - Satyanarayan Gangaram Pitroda Invent a New India Using Knowledge 0 1 ' 5 Jawaharlal Nehru Step Out From the Old to the New 1 + , 1 + Mazdoor Kisan Shakti Sangathan The Right to Information, The Right to Live ! > 0 B Bhart hari N ti atakam Knowledge is such a treasure which cannot be stolen Invent a New India Using Knowledge SP 46 (2003): Engineering Drawing Practice for Schools andColleges [PGD 24: Drawings] l[[wMwRmNrREngineeringDrawingPracticefor Schools &CollegesBUREAUOFINDIANSTANDARDSM ANAKBHAVAN,9 BAHADURSHAHZAFARMARGNEWDELHI110002 SP46 ; ,NewDelhiPrintedinIndiaatF%ntograph,2966 /40,Beadonpura,KarolB@,NewDelhi-110005 AndPublishedByBUREAUOFINDIANSTANDARDS,9 BAHADURSHAHZAFARMARG,NEWDELHI110002 DrawingSectionalCommittee,BP24 OrganisationInpersonalcapacity[GeneralMa nager(Retd.)]]]

3 , ,Tiruchirapa[li]BhamtHeavyElectnczdsLimi ted,BhopalCeumdManufacturingTechnologyIn stitute,BangaloreCentralMechanicalEngine eringResearchInstitute,DurgapurDepartmen tofAtomicEnergy,MumbaiDGE&T,MinistryofL~ bour&Rehabilitation,NewDelhiDirectorateG enemlofSuppliesandDisposals,NewDelhiEngi neersIndiaLimited,NewDelhiFluidPowerSoci etyof India,BangaloreHMTL imited,BangaloreHeavyMachineBuildingPlan t,RanchiHindustanAeronauticsLimited,Bang aloreInstrumen~~tionLimited,KotaMinistry ofDefence,CQAE,PuneMinistryofDefence,R&D E(Engrs),PuneMotorIndustriesCoLimited,Ba ngaloreNGEFL imited,BangaloreOilandNatumlGasCommissio n,DehradunProjectsandDevelopmentIndiaLim ited,DhanbadResearchDesignandStmdardsOrg anization,LucknowTa~dEngineering&Locomot iveCoLimited,JamshedpurTheInstitutionofE ngineers(I),KolkataUniversityGrdntsCommi ssion, (Chairman) (AlternateI) (Alternate11) (Alternate) (Alternate) (Alternate) ,SRINIVASAN(Alternate) (Alternate) (Alternate1) (AlternateII) (AlternateIII) (AlternateI)SHRIDINESHMOHAN(AlternateH) (Akernate) (Alternate) (Alternate) (Alternate) (Alternate) (Alternate) (Alternate) (Alternate) (Alternate) (Alternate) ,Director(SG)(BPD)

4 [RepresentingDirectorGeneral(Ex-oficio)] (BPD),BIS(iii) PanelforRevisionofSP46 Orga/lizalionRepresentativesInpersonalca pacity[GeneralManager(Retd.), , ,AN(Convener)Tirachirapalli]CentrttlManu f~ctunngTechnologyInstitute, , ,Bang~ , , , (iv) FOREWORDI nallthethreetypesofexchangelikeexchangeo fgoods,exchangeofservicesandexchangeofin formation, ,orothertechnicaldrawingsillustratingthe components, ,forexample, , ,especiallywheredifferentlanguagesareinv olved, ,IS696 Codeofpracticeforgeneralengineeringdrawi ngs , , ,thecontentsofIS696:1972 Codeofpracticeforgeneralengineeringdrawi ngs(secondrevision) ,aspecialpublicrrtionSP46:1988 Engineeringdrawingpmcticeforschoolsandco lleges (olerancing, ,lotc) ,referencetotherelevantInternationalStan dardsmaybemade.

5 (v) , (seeProjections). ,namely,civil,mechanical,electrical,elec tronics,etc,thecontentsoflatestversionso fInternationalStandardshavebeenincorpora tedinthisversion.(vi) ForewordvNotesontheUseofthisPublicationS ection1 SizesandLayoutofDrawingSheetsSection2 ItemReferencesonDrawingsandItemListsSect ion3 PlanningofAssemblyDrawingsSection4 FoldingofDrawingPrintsSection5 ScalesSection6 LinesSection7 LetleringSection8 AProjectionMethods SynopsisSection8 BProjectionMethods OrthographicRepresentationsSection8 CProjectionMethods AxonometricRepresentationsSection8 DProjectionMethods CentralProjectionSection9 TechnicalDrawings SimplifiedRepresentationofPipelines GeneralRules.

6 OrthogonalRepresentationandIsometricProj ectionSection10 SectionsandOtherConventionsSectionSectio nSection1 AConventionalRepresentationofScrewThread sandThreadedParts GeneralConventions1 BConventionalRepresentationofScrewTfn-ca dsandThreadedParts SimplifiedRepresentationlCConventionalRe presentationofSprings SimplifiedRepresentationSection1lDConven tionalRepresentationofGearsonTechnicalDr awingsSection12 GeneralPrinciplesofDimensioningonTechnic alDrawingsSection13 IndicationofLinearandAngularToleranceson TechnicalDrawingsSection14 DimensioningofConesSection15 IndicationofSurfaceTextureinTechnicalPro ductDocumentationSection16 SimplifiedRepresentationoftheAssemblyofP artswithFastenersSection17 SimplifiedRepresentationofBarsandProfile SectionsSection18 Welded,BrazedandSolderedJoints- SymbolicRepresentationonDrawingsSection1 9 ExamplesofIndicationandInterpretationofG eometricalTolerancingSymbolsandCharacter isticsSection20 AbbreviationsAnnexATypicalExamplesAnnexB SystemsofLimitsandFitsAnnexCGuideforSele ctionofFitsAnnexDGeneralTolerancesforLin earandAngularDimensionsAnnexEListofRefer redandOtherRelevantIndianStandardsandInt ernationalStandardsAlphabeticalIndexPage vi15791213525759657086980711131181221341 37139149152156179181183185189195197201(v ii)

7 SECTION1 SIZESANDLAYOUTOFDRAWINGSHEETS[BasedonIS1 0711:1983/1S05457:1980andIS11665:1985/1S 07200:1984] :y=1:~isobtainedforthetwosidesdrawingshe etsforusewithalltechnicaldrawingsinxandy ofaformat( ), ( ).Thebasicprinciplesinvolvedinarrivingat thesizesare:a)x:y=l:tib)xy=lwherexandyar ethesidesandhavingasurfaceareaoflm2sotha tx= :2( ) (FirstChoice) ( )DesignationDimensions, SP46 (SecondChoice)Whenasheetofgreaterlengthi sneeded, ( )DesignationDimensions, (ThirdChoice)Whenaverylargeorextraelonga tedsheetisessential, ( )DesignationDimensions,mmAOX2 )1189X1682 AOX31189X25232)A1x3841X1783 AIx4841X23782)A2x3594X1261A2x4594X1682A2 x5594x2102A3x5420X1486A3x6420X1783A3x742 0X2080A4x6297XI261A4x7297X1471A4x8297X16 82A4x9297X1892I)~hl~ )~o~p~~ctic~l~ea~on5,theUseofthesesizesk not~ , ( )orvertically( ).

8 ,1 Thepositionofthetitleblockshouldbewithin (hedrawingspace( )suchthattheportionofthetitleblockcontai ningtheidentificationofthedrawing(regist rationnumber,title,origin,etc)issituated inthebottomright-handcomerofthedrawingsp ace,bothforsheetspositionedhorizontally( TypeX)( )orvertically(TypeY)( ).Thedirectionoftheviewingofthetitlebloc kshouldcorrespond,ingeneral, ( , ). , ,andaminimumwidthof10mmforsizeA2,A3andA4 ( ). ( )andshouldbeplacedacrosstheframe,oneatas hortersideandoneatalongerside,coinciding withthecentringmarksonthosesides, ( ).2 , ,neartheframeintheborder, SP46:2003~I~ ~hs~ ~ ~ ,inordertopermiteasylocationonthedrawing ofdetails,additions,modifications, ~ ,thetotalnumberofsheetshouldbeshownonshe et1, , ,containingonlytheiden-tificationzone, SP46:2003 SECTION2 ITEMREFERENCESONDRAWINGSANDITEMLISTS[Bas edonIS10712:1983/1S06433:1981andIS11666: 1985/1S07573:1983] ,2 ( ).)

9 ( ) , ,however, ,forexample,by:a)b)c)usingcharactersofal argerheight,forexample,twicetheheightasu sedfordimen-sioningandsimilarindications ;encirclingthecharactersofeachitemrefer- ence,inthatcaseallsuchcirclesshallhaveth esamediameterandtobedrawnwithcontinuousn arrowline( ).combiningmethods(a)and(b). ( , ). , SP46 ( ( ,Items8,9,10and11). , (orasub-assembly),orofdetailedparts, (oronotherdrawings) ,thesequenceshallbefrombottomtotop,withh eadingsofthecolumnimmediatelyunderneathw ithseparateitemlists, , , ,todistinguishthisidentificationfromthat oftheparentdrawing,itisrecommendedthatth eitemlistnumberbeprecededbytheprefixitem list( ). (thesequenceoftheseisoptional):a)item,b) description,c)quantity,d)reference,ande) Ifnecessary, SECTION3 PLANNINGOFASSEMBLYDRAWINGS[BasedonDIN199 -2:1977] , , ,applicabletogeneralengineeringdrawingsa ndalsostructuraldrawingsistoincludeoneac hindividualdrawingsheetofaseriesofdrawin gs,asmallkeyplanorelevationorboth,conven ientlyplacednearthetitleblock,indicating partofthewholeworkincontinuouswidelinest owhichtheparticulardrawingsheetrefers( ).

10 STAGESTAGE2 STAGE#It:III!III:3:STAGE40 DETAILECIPART,0-.,::HALFFINW+EOPART%.~qP RODUCT 1 SUB-ASSEMRC?a25 FIG, S1 46 ,thedetailedviewshownin,anyfurthersub-as sembliesandparts, . ~ -F1ii--117j-\, 1 EXPLANATIONOFSYMBOLStlGROUPPRODUCToCOMPO SITEPART{:; SEMI-FINISHEDPRODUCT()INDICATIONOFQUANTI TYE==lE13 ObjectMmQuantity112A1B1 DACoaehtslfImObjtctW+antkyB242c181m, .. SP46:2003 SECTION4 FOLDINGOFDRAWINGPRINTS[BasedonIS11664:19 86] ,1 Thefirstmethodisintendedfordrawingprints tobefiledorbound, :a)alllargeprintsofsizeshigherthanA4aref oldedtoA4sizes;b)thetitleblocksofallthef oldedprintsappearintopmostposition;andc) , Alldimensionsinmillime~ SHEETIESIGNATICAo841X118Al594X841A2420x5 94A3297x&20 FOLDINGDIAGRAMLI189d139,f2101210210210*, 210itIII11([1,1;IG~1I:7 Faol:---L---+.]}