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 • Jul. 27, 2019

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

From Turning and Boring A specialized treatise for machinists, students in the industrial and engineering schools, and apprentices, on turning and boring methods, etc. by Jones, Franklin D.

The turning of flywheels is a common vertical boring mill operation, and this work will be referred to in detail later on.

From Turning and Boring A specialized treatise for machinists, students in the industrial and engineering schools, and apprentices, on turning and boring methods, etc. by Jones, Franklin D.

Turning the Rim of a Flywheel Turning a Flywheel on a Vertical Mill.—The turning of a flywheel is a good example of the kind of work for which a vertical boring mill is adapted.

From Turning and Boring A specialized treatise for machinists, students in the industrial and engineering schools, and apprentices, on turning and boring methods, etc. by Jones, Franklin D.

I had no difficulty in locating Hart Jones, for he was striding from lathe to workbench to boring mill, issuing his orders with the sureness and decision of a born leader of men.

From Astounding Stories of Super-Science July 1930 by Bates, Harry