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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

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

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

Rumford was engaged in superintending the boring of cannon in the military arsenal at Munich, and was struck by the amount of heat produced by the action of the boring bar upon the brass castings.

From Encyclopaedia Britannica, 11th Edition, Volume 9, Slice 3 "Electrostatics" to "Engis" by Various

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

When the feed is applied to a revolving boring bar the construction is the same, but in this case the pin is stationary and the star revolves with the feed screw of the bar.

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