jackshaft

[ jak-shaft, -shahft ]

noun

, Machinery.

1. Also called countershaft. a short shaft, connected by belting, gears, etc., that transmits motion from a motor or engine to a machine or machines being driven ( main shaft ).
2. a shaft on which an idle wheel or fairlead turns.

jackshaft

/ ˈdʒækˌʃɑːft /

noun

1. a short length of shafting that transmits power from an engine or motor to a machine

Word History and Origins

Origin of jackshaft¹

First recorded in 1895–1900; jack ¹ + shaft

Example Sentences

These little internal-gear sprockets were hung on double-shrouded pinions secured to each end of the jackshaft.

From Project Gutenberg