Sunk Keys


Sunk Keys

The sunk keys are provided half in the key way of the shaft and half in the key way of the hub or boss of the pulley. The sunk keys are of the following types :

1. Rectangular sunk key.

A rectangular sunk key is shown in Fig. 1.

The usual proportions of this key are :

Width of key, w = d / 4 ; and

thickness of key, t = 2w / 3 = d / 6

where d = Diameter of the shaft or diameter of the hole in the hub.

The key has taper 1 in 100 on the top side only.

Rectangular sunk key.
Fig. 1 Rectangular sunk key.

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Reference A Textbook of Machine Design by R.S. Khurmi and J.K. Gupta

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