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helical gear

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noun
  1. a cylindrical gear wheel whose teeth follow the pitch surface in a helical manner.
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Origin of helical gear

First recorded in 1885–90
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
British Dictionary definitions for helical gear

helical gear

noun
  1. a cylindrical gearwheel having the tooth form generated on a helical path about the axis of the wheel
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Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012