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jack•shaft



Pronunciation: ( jak'shaft", -shäft"), [key]
n. Mach.
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.

Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.

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