An intermediate shaft; esp., one which receives motion from a line shaft in a factory and transmits it to a machine.

an intermediate or secondary shaft between the drive shaft of a conveyor and the source of power.

An intermediate shaft that is rotated by a mainshaft and transmits, in turn, that rotation to a working part.

Also called a jackshaft, this solid, short round shaft is used for the transmission of power from a motor to a working part.

An intermediate or secondary shaft(s) in a transmission to which are splined a cluster of two or more gear; which mesh with the mainshaft gears which run free on the mainshaft; the input shaft (main drive gear) turns the countershaft which in turn drives the mainshaft (output shaft) gears; the mainshaft (output shaft) is driven by locking one gear at a time to the mainshaft.