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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 pump shown on the left-hand side of the engraving is used to deliver a constant stream of water through the boring bar, the connection being made by a flexible hose.

From Scientific American Supplement, No. 520, December 19, 1885 by Various

The common form of the smaller sizes of boring bar is that shown 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