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idle pulleyalso idler pulley
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.
(General Engineering) a freely rotating trolley used to control the tension or direction of a belt. Also called: idler
i′dle (or i′dler) pul`ley,
a loose pulley made to press or rest on a belt in order to tighten or guide it.
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|Noun||1.||idle pulley - a pulley on a shaft that presses against a guide belt to guide or tighten it|