half-round file

British  

noun

1. engineering a file having a semicircular cross-section

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Example Sentences

It will be seen, however, that unless for some special purpose, the pitsaw round or half-round file will be found to answer the same purpose as the tumbler file.

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

With a half-round file one side of one of the blocks is filed slightly concave, so that it will fit on the outside of the cylinder.

From Boys' Book of Model Boats by Yates, Raymond F. (Raymond Francis)

A bent pair of shears was used for cutting the end of strip into the shape of a pen; and a half-round file or smooth was used for finishing the pen.

From The Story of the Invention of Steel Pens With a Description of the Manufacturing Process by Which They Are Produced by Bore, Henry

Make an incision with a half-round file in the under side of the tube for the wires to come through.

From The Boy Mechanic: Volume 1 700 Things for Boys to Do by Popular Mechanics Co.

It will be found that in a smooth, half-round file 1 inch in width, about twenty courses are required for the convex side, and two courses alone serve for the flat side.

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