Line shaft

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(Mach.) a main shaft of considerable length, in a shop or factory, usually bearing a number of pulleys by which machines are driven, commonly by means of countershafts; - called also line, or main line.

See also: Shaft

Webster's Revised Unabridged Dictionary, published 1913 by G. & C. Merriam Co.
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The Corliss engine drove some 5 miles (accounts vary) of overhead line shafting that ran throughout the hall and provided power to an estimated 8,000 machines.
Integrating the expansion shaft servo couplings into R+W's line shafting allows for easy synchronization of parallel actuators in cases where the load is wide enough to require the dual support.
Multiple independent servomotors provide electronic line shafting capable of automatic re-registration or die-to-die synchronization.