The usual proportion for the width of key is (where d = Diameter of shaft or diameter of hole in the hub)

The usual proportion for the width of key is (where d = Diameter of s

1.	The usual proportion for the width of key is (where d = Diameter of shaft or diameter of hole in the hub)
A.	d/8
B.	d/6
C.	d/4
D.	d/2
Answer» D. d/2

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The usual proportion for the width of key is (where d = Diameter of shaft or diameter of hole in the hub)

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