idle pulley

idle pulley

noun Machinery.
a loose pulley made to press or rest on a belt in order to tighten or guide it.
Also, idler pulley.
Also called idle wheel.


Origin:
1885–1890
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2012.
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Idle pulley is always a great word to know.
So is ninnyhammer. Does it mean:
a fool or simpleton; ninny.
a calculus or concretion found in the stomach or intestines of certain animals, esp. ruminants, formerly reputed to be an effective remedy for poison.
Collins
World English Dictionary
idle pulley or idler pulley
 
n
Also called: idler a freely rotating trolley used to control the tension or direction of a belt
 
idler pulley or idler pulley
 
n

Collins English Dictionary - Complete & Unabridged 10th Edition
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