Of Abbreviations

ADF amplitude distribution function

ANSI American National Standards Institute

BAC bearing area curve

BSI British Standards Institution

CAD computer aided design

CDF cumulative distribution function

CL centre line

CRS centres

CSK countersunk

CYL cylinder

D diameter

DLA diameter

DIN Deutsches Institut für Normung

DRG drawing

EDM electro-discharge machining

EL evaluation length

GT geometric tolerance

HEX hexagonal

ISO International Standards Organisation

IT international tolerance

L lower tolerance limit

MMC maximum material condition

PCD pitch circle diameter

R radius

RAD radius

RMS root mean square

SEM scanning electron microscope

SF surface finish

SL

sampling length

SP

spherical diameter

SQ

square feature

SR

spherical radius

S4>

spherical radius

THD

thread

THK

thick

TOL

tolerance

TPD

Technical Product Documentation

U

upper tolerance limit

VOL

volume

2D

two dimensions

3D

three dimensions

diameter

n

Introduction List of Symbols List of Abbreviations

1 Principles of Engineering Drawing 1

2 Projection Methods 23

3 ISO Drawing Rules 44

4 Dimensions, Symbols and Tolerances 65

5 Limits, Fits and Geometrical Tolerancing 88

6 Surface Finish Specification 111 App.: Typical Examination Questions 134 Background and Rationale of the Series 158 Index 160

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