screw auger

noun
an auger having a helical outer surface suggesting a screw thread.

Origin:
1785–95, Americanism

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Based on the Random House Dictionary, © Random House, Inc. 2014.
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WordNet
screw auger

noun
hand tool for boring holes [syn: auger
WordNet® 3.0, © 2006 by Princeton University.
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Example sentences
These ingredients combined with water were mixed with a screw auger, and the
  material was then pelletized.
Shot blast media recovery system will be screw auger type only.
The water is spun out of the sludge as it is moved down the screw auger for
  final discharge.
The three types of processes are rotary dryer, heated screw auger, and
  fluidized-bed.
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