Q. The semi-circular key is sued for transmitting light torque is
Solution:
A sunk key is provided with half in the keyway and half in the keyway of hub or boss of the pulley
Woodruff key is a type of sunk key. It is semicircular in section.
The primary advantage of the woodruff key
i) This key is Self-adjusting type while transmitting power in a shaft
ii) Extra-depth of the key in the shaft prevents slipping phenomenon between the two members
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