HANDWHEEL
handwheel
(noun) control consisting of a wheel whose rim serves as the handle by which a part is operated
handwheel
(noun) a wheel worked by hand
Source: WordNet® 3.1
Etymology
Noun
handwheel (plural handwheels)
(mechanics) Any wheel worked by hand, whether used to allow leverage, as of a valve or a handbrake, or to allow fine adjustment, as of a set screw.
Source: Wiktionary
Hand"wheel`, n. (Mach.)
Definition: Any wheel worked by hand; esp., one the rim of which serves as
the handle by which a valve, car brake, or other part is adjusted.
Source: Webster’s Unabridged Dictionary 1913 Edition