boring mill

American  

noun

1. Metalworking.  a machine for boring large holes in heavy work, having a table on which the work rotates while the hole is bored vertically.

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boring mill British  

noun

1. Also called (informal): roundabout.  engineering a large vertical lathe having a rotating table on which work is secured. Tools are held on a fixed post and the work is rotated around it

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Etymology

Origin of boring mill

First recorded in 1825–35

Example Sentences

His father, John, a Navy veteran of World War I, worked as a boring mill operator at an aircraft company, according to government records.

From Washington Post

The Hot Springs Sentinel-Record reported that capital improvements include a new boring mill that will increase the plant’s capacity and allow it to create more high-skilled manufacturing jobs.

From Seattle Times

Look for her today, three years later, and you’ll find her on the sunrise shift running a vertical boring mill alongside crews that are mostly male and twice her age.

From Washington Post

Manufacturer: "Can he run a boring mill?"

From Time Magazine Archive

Very often more than one tool is used at a time, as will be shown later by examples of vertical boring mill work.

From Project Gutenberg