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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BOLT<br />
30°<br />
0.8d<br />
Steps Involed:<br />
Ø2d<br />
WASHER<br />
Ød<br />
Ø2d+3<br />
FRONT VIEW<br />
TOP VIEW<br />
UPTO 2d+6<br />
NUT<br />
Fig 2.29<br />
MACHINE DRAWING<br />
(i) Since the axis is parallel to both V.P and H.P, the side view reveals more<br />
informati<strong>on</strong> about the shape <strong>of</strong> the object. So start with side view, where circles<br />
are seen.<br />
(ii) Draw two circles <strong>of</strong> diameter d = 25mm and 0.8d = 20mm, in dotted lines to<br />
indicate the invisible feature from left side.<br />
(iii) Draw the chamfering circle <strong>of</strong> diameter, 1.5d + 3mm =40.5mm<br />
(iv) Circumscribe hexag<strong>on</strong> around the chamfering circle, using set-square and<br />
minidrafter.<br />
(v) Then draw a circle <strong>of</strong> diameter 2d + 3mm = 53mm for washer.<br />
(vi) Project the side view to fr<strong>on</strong>t view and top-view.<br />
(vii) Both the views are completed as shown in the Fig 2.29<br />
66 ENGINEERING GRAPHICS<br />
d<br />
R = d<br />
W<br />
W<br />
SIDE VIEW<br />
COMBINATION OF HEXAGONAL HEADED BOLT WITH HEXAGONAL NUT & WASHER
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