idler pulley
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idle pulley
also idler pulleyn.
A pulley on a shaft that rests on or presses against a drive belt to guide it or take up slack. Also called idle wheel.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
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Noun | 1. | idler pulley - a pulley on a shaft that presses against a guide belt to guide or tighten it pulley, pulley block, pulley-block, block - a simple machine consisting of a wheel with a groove in which a rope can run to change the direction or point of application of a force applied to the rope |
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