A Text Book on Engineering Graphics - Central Board of Secondary ...
A Text Book on Engineering Graphics - Central Board of Secondary ...
A Text Book on Engineering Graphics - Central Board of Secondary ...
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MACHINE DRAWING<br />
Fig 2.1 b :<br />
Screw threads are widely used for temporary fastening as well as for transmissi<strong>on</strong> <strong>of</strong> power from<br />
<strong>on</strong>e machine parts to another<br />
2.3 TERMS USED IN THREADS / SCREW THREADS<br />
The various terms in c<strong>on</strong>necti<strong>on</strong> with screw threads are given below. Refer Fig.2.2<br />
Slope<br />
Crest<br />
Root<br />
Pitch<br />
Outside dia.<br />
Root or core dia.<br />
Nominal Dia.<br />
Axis<br />
(A) EXTERNAL<br />
RIGHT HAND THREAD<br />
SCREW THREAD<br />
Depth<br />
Lead<br />
Flank<br />
Angle<br />
(B) INTERNAL<br />
LEFT HAND THREAD<br />
Fig.2.2<br />
(C) EXTERNAL<br />
LEFT HAND THREAD<br />
ENGINEERING GRAPHICS 41
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