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boring bar

American  

noun

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


Etymology

Origin of boring bar

First recorded in 1835–45

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

An Underwood portable boring bar machine from the 1890s was recently used to bore out one of the locomotive’s cylinders.

From Washington Times • Feb. 20, 2016

The boring bar is counterbalanced by a weight within the frame.

From Modern Machine-Shop Practice, Volumes I and II by Rose, Joshua

The excessive length of bar, thus rendered necessary, is the principal objection to this form of boring bar, because of its liability to spring.

From Modern Machine-Shop Practice, Volumes I and II by Rose, Joshua

Two driving heads are provided, each having a main spindle, but holding the boring bar after the manner of an ordinary lathe, and within each spindle is another capable of longitudinal traverse.

From Modern Machine-Shop Practice, Volumes I and II by Rose, Joshua

An excellent form of boring bar and cutter is shown in Figs.

From Modern Machine-Shop Practice, Volumes I and II by Rose, Joshua