[PDF] SP 46 (2003): Engineering Drawing Practice for Schools and Colleges

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Disclosure to Promote the Right To Information

Whereas the Parliament of India has set out to provide a practical regim e of right to information for citizens to secure access to information under the contr ol of public authorities, in order to promote transparency and accountability in the working of ev ery public authority, and whereas the attached publication of the Bureau of Indian Standards i s 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 ava ilable to promote the timely dissemination of this information in an accurate manner to the pu blic.

Satyanarayan Gangaram Pitroda

"Invent a New India Using Knowledge"

Jawaharlal Nehru

"Step Out From the Old to the New"

Mazdoor Kisan Shakti Sangathan

"The Right to Information, The Right to Live" Bhart hari - N ti atakam "Knowledge is such a treasure which cannot be stolen" "Invent a New India Using Knowledge"

Colleges [PGD 24: Drawings]

l [[wMwRmNrR

EngineeringDrawingPractice

for

Schools&Colleges

BUREAUOFINDIANSTANDARDS

MANAKBHAVAN,9BAHADURSHAHZAFARMARG

NEWDELHI110002

SP46:2003

FIRSTPUBLISHEDMARCH1989

FIRSTREVISIONJULY2003

0BUREAUOFINDIANSTANDARDS

ICS01.100.01;03.180

ISBN81-7061-019-2

Price:

Rs.1440.00

TypesetbyM/sParagonEnterprises,NewDelhi

PrintedinIndia

AndPublishedBy

BUREAUOFINDIANSTANDARDS,

9BAHADURSHAHZAFARMARG,NEWDELHI110002

DrawingSectionalCommittee,BP24

Organisation

Tiruchirapa[li]

BhamtHeavyElectnczdsLimited,Bhopal

DepartmentofAtomicEnergy,Mumbai

EngineersIndiaLimited,NewDelhi

FluidPowerSocietyof'India,Bangalore

HMTLimited,Bangalore

HeavyMachineBuildingPlant,Ranchi

HindustanAeronauticsLimited,Bangalore

Instrumen~~tionLimited,Kota

MinistryofDefence,CQAE,Pune

MinistryofDefence,R&DE(Engrs),Pune

MotorIndustriesCoLimited,Bangalore

NGEFLimited,Bangalore

OilandNatumlGasCommission,Dehradun

TheInstitutionofEngineers(I),Kolkata

UniversityGrdntsCommission,NewDelhi

BISDirectorateGenerdlRepresenting

DRR.VASUDEVAN(Chairman)

SHRIV.W.BOKIL

SHRIJ.JAYASINGHRAJ(AlternateI)

SHRIR.BHATIA(Alternate11)

SHRIS.HANUMANTHARAO

SHRIS.K.MAHAJAN(Alternate)

SHRIM.K.BANERJEE

SHRIP.K.SHANGARI(Alternate)

SHRIS.G.JOSHI

SHRIN.R.SONAR(Alternate)

SHRIS.I.SIDDIQUI

SHRIN,SRINIVASAN(Alternate)

SHRIJ.K.KHANNA

SHRIR.KARUPPIAH(Alternate)

SHRIG.R.RAJAGOPALAN

SHRIT.S.VENKATESHAMURTHY

SHRIK.B.RAMAKRISHNA

SHRIS.L.NAHAR(Alternate1)

SHRIN.K.SRJNIVAS(AlternateII)

SHRIM.D.GAUTAM(AlternateIII)

SHRIN.K.SINHA

SHRIS.M.Q.ALAM(AlternateI)

SHRIDINESHMOHAN(AlternateH)

SHRID.KRISHNARAO

SHRIC.GOVINDASAMY(Akernate)

SHRIN.S.CHAUDHARY

SHRIJ.S.SEHMI(Alternate)

SHRIA.V.KETKAR

SHRIR.A.KULKARNI(Alternate)

SHRIM.D.SAIW

SHRIBALBIRSINGH(Alternate)

SHRIN.SRINIVASAMURTHY

SHRIS.SAMPATHKUMAR(Alternate)

SHRIS.U.NARASIMHAMURTHY

SHRIGOPINATH(Alternate)

SHRIANJANIKUMAR

SHRIR.N.GUPTA(Alternate)

SHRIR.PRASADSINHA

SHRIB.K.JHA(Alternate)

JOINTDIRECTORWAGON-5

SHRIKANHAIYASINGH

SHRIS.UMAPATHY(Alternate)

SHRIW.L.DHAM

SHRIRAJENDRAPRAKASH

SHRIP.D.PARASHAR,Director(SG)(BPD)

[RepresentingDirectorGeneral(Ex-oficio)]

MemberSecretary

SHRIS.D.DAYANAND

DeputyDirector(BPD),BIS

(iii)

PanelforRevisionofSP46

Orga/lizalion

Representatives

Tirachirapalli]

HMTLimited,BangaloreSHRIK.B.RAMAKRISHNA

(iv)

FOREWORD

oradvice. beginningoftheyear2001. thoseincluded. drawingclasses. (v)

NOTESONTHEUSEOFTHISPUBLICATION

text. drawingspreparedafter31December1991. (vi)

Forewordv

NotesontheUseofthisPublication

Section1SizesandLayoutofDrawingSheets

Section3PlanningofAssemblyDrawings

Section4FoldingofDrawingPrints

Section5Scales

Section6Lines

Section7Letlering

Section8AProjectionMethods - Synopsis

Section8BProjectionMethods - OrthographicRepresentations Section8CProjectionMethods - AxonometricRepresentations

Section8DProjectionMethods - CentralProjection

Section9TechnicalDrawings - SimplifiedRepresentationofPipelines -

Section10SectionsandOtherConventions

Section

Section

Section1AConventionalRepresentationofScrewThreadsandThreadedParts -

GeneralConventions

1BConventionalRepresentationofScrewTfn-cadsandThreadedParts -

SimplifiedRepresentation

lCConventionalRepresentationofSprings - SimplifiedRepresentation

Section14DimensioningofCones

Section18Welded,BrazedandSolderedJoints- - SymbolicRepresentationonDrawings andCharacteristics

Section20Abbreviations

AnnexATypicalExamples

AnnexBSystemsofLimitsandFits

AnnexCGuideforSelectionofFits

AlphabeticalIndexPage

vi 1 5 7 9 12 13 52
57
59
65
70
86
98
07 11 13 118
122
134
137
139
149
152
156
179
181
183
185
189
195
197
201
(vii)

SECTION1SIZESANDLAYOUTOFDRAWINGSHEETS

a)x:y=l:ti b)xy=l lm2sothatx=0.t341mandy=l.189m.

1.2.1Twoseriesofsuccessiveformatsizesare

1:2(seeFig.1.1)

FIG.1.2SIMILARITYOFFORMATS

FIG.

1.3RELATIONSHIPBETWEENTwoSIDES

1.3DesignationofSizes

1.3.1SizesSerieslSO-A(FirstChoice)

Table1.1SizesSeriesISO-A

(Clauses1.3.1and1.4)

DesignationDimensions,mm

AO 841
X1189 Al594 X841 A2420 X594 A3 297
X420 FIG.

1.1A4210X297

1

SP46:2003

1.3.2SpecialElongatedSizes(SecondChoice)

shortersidesofthechosenbasicformat.

Table1.2SpecialElongatedSizes

(Clauses1.3.2and1.4)

DesignationDimensions,mm

A3x3420

X891

A3x4420

X1189

A4x3297

X630

A4x4297

X841

A4x5297

X1051 shortersidesofthechosenbasicformat.

Table1.3ExceptionalElongatedSizes

(Clauses1.3.3and1.4)

DesignationDimensions,mm

AOX2')1189

X1682

AOX31189X25232)

A1x3841

X1783

AIx4841X23782)

A2x3594

X1261

A2x4594X1682A2x5594x2102

A3x5420

X1486

A3x6420X1783

A3x7420X2080

A4x6297

XI261

A4x7297

X1471

A4x8297X1682

A4x9297X1892

I)~hl~siZeisequalto2AOoftheISO-Aseries.

1.4SelectionofSizes

Fig.1.6.

1.5TitleBiock

1.5.1Position

FIG.1.4SHEETTYPEX - HORIZONTAL

aFIG.1.5SHEETTYPEY - VERTICAL

Fig.1.7,1.8and1.9).

1.6BordersandFrames

bordershavetheminimumwidthof20mmforsizes

AOandAl,andaminimumwidthof10mmforsize

A2,A3andA4(seeFig.1.6).

1.7CentringMarks

whenreproducedormicrofilmed.

1.8OrientationMarks

marksalwayspointstotheWughtsroan.

1.9MetricReferenceGraduation

Itisrecommendedtoprovideonalldrawingsa

figurelessmetricreferencegraduationwitha minimumlengthof100remanddividedinto10mm intervals(seeFig.1.11). 2

MINIMuMWIDTH

(20mm

FORAOANDAl,

10 mmFORA2,A3ANDAL) I

1I2I3I41516

AA EDGE BB c c FRAME o

TITLEBLOCKo

I 12i3P 14 /I5I6DRAWING SPACE f@U!2JK=RENcE I1

FIG.1.7

I-J---JFIG.1.8

BOR~/ti°CKSHALLCONTAINNAMC.

DAIE,PROJECTIONSYMBOL.SCALE.

TITLEANOORAWINGNuMBER"

FIG.1.6

FIG.1.9

FIG.1.10

ORIENTATIONMARKS

mmminimumthickness. 3

SP46:2003

I i

II11111I

FIG.1.11METRICREFERENCEGRADUATION

microfilmedinmowlhanonesection.

1.10GridReferences

locationonthedrawingofdetails,additions, divisiblebytwoandbechoseninrelationtothe berepeatedontheoppositesides.

1.11MultipleSheetDrawings

Multiplesheetdrawingsmarkedwiththesame

sheet1,forexample:

SheetNo.=nlp

where nisthesheetnumber,and pisthetotalnumberofsheets. sheet.quotesdbs_dbs10.pdfusesText_16

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