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idler

idler

7.4
A wheel that guides a belt and keeps it tight without driving it
  • noun
  • /ˈaɪdlər/
  • Specialized
translation icon : polea loca
  • The factory uses an idler to keep the conveyor belt running smoothly without losing tension.
  • idler wheel
  • idler pulley
  • belt with an idler

Examples

  • Plastic idlers let the gear train run without lubricant.

    Academic text (2002)
  • Martin carries a complete line of Idler Sprockets including ball bearing, needle bearing, bronze bushed, bronze beating, and non-metallic.

    Academic text (2002)
  • So I've got four of those and one idler per set of tracks.

  • It looks like the idler wheel has slipped.

  • Because all the rollers spin in the same direction, idler gears were required between them.

    Academic text (2002)
  • All Idlers are in stock and ready for immediate shipment.

    Academic text (2002)
  • The products include clutch-release bearings, sprocket idlers, belt and precision idlers, and adapter bearings.

    Academic text (1995)
  • MITCH HAS BEEN WAITING FOR NEW BOLTS TO REPLACE THE IDLER WHEEL THAT HOLDS THE D9 DOZER'S TRACK IN PLACE.

  • He adjusted the idler to ensure the belt maintained the proper alignment during operation.

  • To prevent slippage, the design incorporates an idler that supports the tension of the drive belt.

Synonyms

idle wheel
vsidler
  • Specialized
7.7

A wheel that presses on a belt to guide and keep it tight without powering the belt

is defined by guiding and supporting while not supplying drive power
idler pulley
vsidler
  • Specialized
8.3

A small wheel on a shaft that presses against a belt to keep it tight

is similar but also implies no power transmission
idle pulley
vsidler
  • Specialized
7.7

A wheel on a shaft that guides and tightens a belt

is broader and explicitly excludes supplying drive power

Compounds

idler pulley
  • Specialized
8.3

A small wheel on a shaft that presses against a belt to keep it tight

Surface Forms

idler singular
idlers plural

Morphology

idler = idle (semi-transparent) = idle + er

Morphologically regular ('idle' + '-er'), but the technical sense 'a passive wheel' is a specialized extension that may not be obvious to general learners.

Etymology

Idler in machines also comes from idle, meaning 'not doing work', so an idler pulley or wheel only guides or supports a belt rather than driving it.