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jackshaft

[jak-shaft, -shahft] /ˈdʒækˌʃæft, -ˌʃɑft/
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 (distinguished from main shaft).
2.
a shaft on which an idle wheel or fairlead turns.
Origin of jackshaft
1895-1900
First recorded in 1895-1900; jack1 + shaft
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Based on the Random House Dictionary, © Random House, Inc. 2018.
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British Dictionary definitions for jackshaft

jackshaft

/ˈdʒækˌʃɑːft/
noun
1.
a short length of shafting that transmits power from an engine or motor to a machine
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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