"The object of this thesis is an attempt to determine the relative efficiency of rock drill bits.
The bits compared were the ordinary double chisel bit, sharpened with a Leyner drill sharpener, and the same bit after it had been filed so that the point was not sharp, but a flat surface 3/32 of an inch wide at the outside, diameter of the bit and tapering to a point at the center of the bit"--page 1.
Forbes, Carroll Ralph
B.S. in Mining Engineering
Missouri School of Mines and Metallurgy
ii, 23 pages
© 1914 George Elmer Abernathy, All rights reserved.
Thesis - Open Access
Bits (Drilling and boring) -- Testing
Print OCLC #
Electronic OCLC #
Link to Catalog Record
Abernathy, George Elmer, "Investigation of rock drill bits" (1914). Bachelors Theses. 75.