| 1. | a wheel for transmitting power and motion between a driving and a driven part, either by friction or by means of teeth. |
| 2. | idle pulley. |
| a loose pulley made to press or rest on a belt in order to tighten or guide it. |
| idle pulley also idler pulley n. 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. |
idle wheel  (click for larger image in new window) n.
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