Page 115 - Analysis and Design of Machine Elements

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1 2 3 4 Detachable Fastenings for Shaft and Hub 93
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1

(a) (b)

Figure 4.2 Guided key and feather key.
Figure 4.3 Woodruff key. Working surface

Taper keys (Figure 4.4a) have a slope of 1 : 100 between the top surface of key and the
mating hub surface, with round ends, square ends and a gib-head end. The installation
of a round end key is similar to that of a parallel key, that is, installing the key first and
then driving the hub over the key; while square-end and gib-head keys are designed to
be inserted from the end of the shaft after the hub is in position.

∠1:100
⦣1:100
Working surface

∠1:100

∠1:100

(a) (b)

Figure 4.4 Taper keys and gib-head keys.