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half-round file

British  

noun

  1. engineering a file having a semicircular cross-section

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Example Sentences

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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 Joshua Rose

Then draw-file the bore with a smooth half-round file and finish with a half-round scraper, easing away the high spots until the bore shows proper contact and is smooth.

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

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 Henry Bore

The round face of a half-round file requires eight, ten or more courses to complete it.

From Encyclopaedia Britannica, 11th Edition, Volume 10, Slice 3 "Fenton, Edward" to "Finistere" by Various

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.

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