Whilst searching got info. on Climax rock drill sharpener, I came across this ebook or rather a .pdf of an old book. Titled - Rock Drills Design Construction and Use by Eustace M Weston it is a free download of about 380 pages at the following URL
www.ebooksread.com/authors-eng/eustace-m-weston.shtml
Looks like it was published in 1910 and stored at library of Uni of California. The whole thing looks a good read, if you are interested in that sort of thing and gives detailed instructions on use of various rock drills. Tony
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