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twist drill

noun, Machinery.
a drill with one or more deep helical grooves in the body.
Origin of twist drill
First recorded in 1870-75 Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2018.
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Examples from the Web for twist drill
Historical Examples
  • Bore it with a twist drill, or nosebit, to the depth of an inch and a half.

  • A twist drill is made with a slight taper toward the shank end.

    Inventors at Work George Iles
  • These reamers are held while in use in a socket inserted in the tailstock spindle, as when using a twist drill.

    Turning and Boring Franklin D. Jones
  • A hole is next drilled in the end of the rod by using a twist drill in the tailstock.

    Turning and Boring Franklin D. Jones
  • For these reasons the fluted drill or the twist drill is preferable, especially as their diameters are maintained without forging.

  • It is found that 120 to 130 such holes can be drilled before it is advisable to resharpen the twist drill.

  • But if a twist drill is ground more flat like a flat drill, it will not "grab" into the metal as it passes through.

  • He had decided to tell of the lunch-box and twist drill episode, but to say nothing, for the present, of the strange white fire.

    White Fire Roy J. Snell
  • twist drill bits will bore both wood and iron, and they are not expensive up to three-eighths inch or one-half inch.

    Farm Mechanics Herbert A. Shearer
  • This drill will go through a wall almost as quickly as a twist drill and with much less labour.

British Dictionary definitions for twist drill

twist drill

a drill bit having two helical grooves running from the point along the shank to clear swarf and cuttings
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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