drill bit

Noun
  1. A bit used in drilling for oil (synset 103245030)
    is a type of: bit - the cutting part of a drill; usually pointed and threaded and is replaceable in a brace or bitstock or drill press
    subtypes:
    • core bit - a hollow drilling bit that is the cutting part of a core drill; allows core samples to be taken
    • blade bit, fishtail bit - a drilling bit with cutting edges usually hardened against wear
    • rock bit, roller bit - a drill bit that has hardened rotating rollers
    same as: drilling bit

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