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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 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

Sellers and Co. form the cutters for their celebrated car wheel boring bar machine as in Fig.

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

A boring bar is best driven from both ends.

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

In the case of the vertical spindle the boring bar may extend down and have journal bearing in a block, or bearing secured to the base plate i.

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