machine head

noun

a metal peg-and-gear mechanism for tuning a string on an instrument such as a guitar

The device is constructed of another sewing-machine head similar to the one already described.

The small handwheel, originally mounted on the machine-head shaft, is left intact.

The width of the pieces will depend on the kind of sewing-machine head used.

In the margins are the perforations necessary to feed the film through the machine head.

A while ago one of the men got his necktie caught between the cogwheels and he was drawn into the machine head first.

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