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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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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)

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

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

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

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

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