half-round file

British  

noun

1. engineering a file having a semicircular cross-section

---

Example Sentences

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.

The corners of the keyway, if to be made square, should be filed out with the corner of a smooth half-round file, because the corners even of safe-edge files do not come up sharp enough.

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

But in both cases it is best, when filing, to occasionally ease out the corners with the edge of a half-round file, for reasons which will be explained presently.

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

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

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)