"The object of this thesis is to find out the relative cutting qualities of different kinds of rock drill bits. The bits tested were: the regular cross bit, the Z bit of the Southeast Missouri type and the bull bit of the Joplin type. All these bits were made on a No. 5 Leyner sharpener and were tempered as nearly alike as possible. All conditions were kept as nearly uniform as possible during the various tests; air pressure, length of stroke, size of bit, etc., the only variables entering being the difference in bits and personal equation of operators"--Introduction, page 1.
Forbes, Carroll Ralph
B.S. in Mining Engineering
Missouri School of Mines and Metallurgy
ii, 24 pages
© 1914 C. Thomas Robson and M. L. Cepeda, All rights reserved.
Thesis - Open Access
Bits (Drilling and boring) -- Testing
Print OCLC #
Electronic OCLC #
Link to Catalog Recordhttp://merlin.lib.umsystem.edu/record=b2609849~S5
Robson, Thomas C. and Cepeda, Miguel Leon, "Comparative tests of rock drill bits for piston machines" (1914). Bachelors Theses. 69.