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boring bar

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noun
  1. Metalworking. a bar holding a tool for boring a cylinder or the like.

Origin of boring bar

First recorded in 1835–45
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for boring bar

Historical Examples

  • At the same time, the bore is finished by a cutter in boring-bar D (Fig. 4).

    Turning and Boring

    Franklin D. Jones

  • This head is also driven by a key which engages a keyway in the boring-bar.

    Turning and Boring

    Franklin D. Jones

  • Next, the boring-bar m1 is brought into position, the drill support being swung back out of the way.

    Turning and Boring

    Franklin D. Jones

  • In the first operation, boring-bar m is brought in line with the spindle and is entered in bushing r in the chuck.

    Turning and Boring

    Franklin D. Jones

  • When a hole is to be bored, a boring-bar B1 is inserted in the spindle and the cutter is attached to this bar.

    Turning and Boring

    Franklin D. Jones