herringbone gear

herringbone gear

noun
a helical gear having teeth that lie on the pitch cylinder in a V-shaped form so that one half of each tooth is on a right-handed helix and the other half on a left-handed helix.
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Based on the Random House Dictionary, © Random House, Inc. 2012.
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Herringbone gear is always a great word to know.
So is flibbertigibbet. Does it mean:
a chattering or flighty, light-headed person.
a gadget; dingus; thingumbob.
Collins
World English Dictionary
herringbone gear
 
n
Also called: double-helical gear a gearwheel having two sets of helical teeth, one set inclined at an acute angle to the other so that V-shaped teeth are formed

Collins English Dictionary - Complete & Unabridged 10th Edition
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