Business / Machine Shop / Idler: A gear or gears placed between two other gears to transfer motion from one gear to the other gear without changing their speed or ratio.
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Idler Noun Synonyms: loafer, layabout, slacker, shirker, sluggard, lazybones, slugabed, laggard, dawdler, clock-watcher, drone, slouch, ne'er-do-well, fain‚ant, lounge lizard, gold brick or gold-bricker
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