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worm gear

noun
1.
a mechanism consisting of a worm engaging with and driving a worm wheel, the two axes usually being at right angles, used where a relatively low speed and a relatively large amplification of power are desired.
2.
Also called worm wheel. a gear wheel driven by a worm.
Also, wormgear.
Origin
1875-1880
1875-80
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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Examples from the web for worm gear
  • The gear housing shall be divided horizontally at the center line of shaft to provide access to the worm gear.
  • Securely fasten flexible connections to round ducts with stainless steel or zinc-coated iron draw bands with worm gear fastener.
  • Securely fasten flexible connections to round ducts with stainless steel or zinc coated iron draw bands with worm gear fastener.
  • The linkage shall be driven by a fully enclosed, double reduction, worm gear speed reducer.
  • Sample distribution shall be through the use of a worm gear drive mechanism.
British Dictionary definitions for worm gear

worm gear

noun
1.
a device consisting of a threaded shaft (worm) that mates with a gearwheel (worm wheel) so that rotary motion can be transferred between two shafts at right angles to each other
2.
Also called worm wheel. a gearwheel driven by a threaded shaft or worm
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
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Word Value for worm

9
10
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