Definition of idler pulley
: a guide or tightening pulley for a belt or chain
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“Idler pulley.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/idler%20pulley. Accessed 9 Aug. 2022.
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Time Traveler for idler pulley
The first known use of idler pulley was circa 1890
See more words from the same year