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 />
Example 24:<br />
Soluti<strong>on</strong><br />
2.15.1.2 WOODRUFF KEY<br />
Sketch free hand a rectangular taper key, in positi<strong>on</strong>, <strong>on</strong> a shaft <strong>of</strong> diameter<br />
40mm, keeping the axis <strong>of</strong> the shaft parallel to V.P and H.P, showing upper half<br />
secti<strong>on</strong>al fr<strong>on</strong>t elevati<strong>on</strong>. Give standard dimensi<strong>on</strong>s.<br />
Refer Fig 2.57<br />
2D<br />
1.5D<br />
D<br />
L<br />
PARALLEL<br />
TO AXIS<br />
FRONT VIEW<br />
40<br />
W= D<br />
4<br />
TAPER 1 IN 100<br />
ØD<br />
T= D<br />
6<br />
10 6.7 60<br />
Fig 2.57<br />
Woodruff key is a special sunk key. It looks like a segment <strong>of</strong> a circular disc. The key seat is<br />
semi circular in shape but the keyway is rectangular. The keyway is smaller in size than the<br />
key seat. The advantage <strong>of</strong> woodruff key is that it can be easily adjusted in the recess. It is<br />
largely used in machine tools and automobile work.<br />
ENGINEERING GRAPHICS 83<br />
1.5D<br />
2D<br />
80<br />
W<br />
LEFT SIDE VIEW<br />
RECTANGULAR TAPER KEY IN POSITION<br />
WOODRUFF KEY<br />
WOODRUFF KEY WITH KEY SLOT IN SHAFT<br />
Fig 2.58<br />
0.5T<br />
0.5T
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