idle pulley

American

Or idler pulley

noun

Machinery.

a loose pulley made to press or rest on a belt in order to tighten or guide it.

idle pulley British

noun

Also called: idler. a freely rotating trolley used to control the tension or direction of a belt

"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

Etymology

Origin of idle pulley

First recorded in 1885–1890

Example Sentences

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See Examples For:

idle pulley

To maintain equal tension of belt at whatever angle the cutter may be set, the idle pulley b2 acts as a belt tightener, being carried by the rods t and t1.

From Modern Machine-Shop Practice, Volumes I and II by Joshua Rose

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Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023