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DRAWING INSTRUMENTS AND THEIR USE
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auxiliary view axis Beam compasses bearing bolt bracket British Standard bush calculations centre lines circular arcs cone cylinder distance Draw full drawn ellipse end elevation engineering drawing equal example Exercise face flange free-hand french curve full-size gear head helical hexagonal hidden edges hole horizontal illustrated in fig inch Insert intersection curve isometric isometric projection joint load locking device lubricator machine metal method nominal diameter obtained orthographic views parallel pencil perpendicular pictorial view pipe pitch circle plan in projection plane of projection plate position practice pressure projection with view radius range factors right angles rivet rotation screw thread section plane sectional elevation set screw set squares shaft shape shear stress shown in fig shows sketches socket steel straight line stud suitable surface teeth tensile stress thickness ton/sq tooth true length valve vertical weld wheel