idler pulley

/ˌaɪdlər ˌpʊli/
IPA guide

Definitions of idler pulley
  1. noun
    a pulley on a shaft that presses against a guide belt to guide or tighten it
    synonyms: idle pulley, idle wheel
    see moresee less
    type of:
    block, pulley, pulley block, pulley-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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