Definition of pulley in English:
noun (plural pulleys)(also pulley wheel)
1A wheel with a grooved rim around which a cord passes. It acts to change the direction of a force applied to the cord and is chiefly used (typically in combination) to raise heavy weights. Compare with block (sense 7) of the noun).
- Prior to World War II, the sash (the parts that move) was counterweighted by a temperamental arrangement of cords, pulleys and iron weights.
- It turned out to be a spare pulley used for lifting heavy equipment.
- We come across bright ideas in books, like over-length lines passed through pulleys under floats and the excess taken up by counter-balancing weights.
1.2A wheel or drum fixed on a shaft and turned by a belt, used especially to increase speed or power.
- Standard belt lengths between pulleys: 132 to 500 mm; widths between 10 and 200 mm.
- There are V-belt constructions made up of sections that lock together, allowing you to wrap the belt around a trapped pulley and join the two ends.
- Something else you don't do - you don't clear sap buildup from between a pulley and belt when the conveyor is running.
verb (pulleys, pulleying, pulleyed)[with object] Back to top
Middle English: from Old French polie, probably from a medieval Greek diminutive of polos 'pivot, axis'.
Definition of pulley in:
- British & World English dictionary
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