crankshaft

English Thesaurus

1. a rotating shaft driven by (or driving) a crank (noun.artifact)

hypernym	:	rotating shaft, shaft,
definition	:	a revolving rod that transmits power or motion (noun.artifact)

part meronym	:	reciprocating engine,
definition	:	an internal-combustion engine in which the crankshaft is turned by pistons moving up and down in cylinders (noun.artifact)