Comparative tests of piston-drill bits

Author

Lister Merriken Cummings

Abstract

"The purpose of this investigation is to compare the relative cutting speeds and efficiency of some of the different types of rock drill bits used in the piston machine, including the regular cross bit, the low center cross bit, a so-called "flat" cross bit, the "Z" bit of the southeast Missouri type, and the Joplin "Bull" bit"--page 2.

Advisor(s)

Forbes, Carroll Ralph

Department(s)

Mining Engineering

Degree Name

B.S. in Mining Engineering

Comments

Illustrated by author.
The title page shows Lister Merriken Cummings as the sole author. The first page of the thesis shows "by Professor C. R. Forbes and L. M. Cummings".

Publisher

Missouri School of Mines and Metallurgy

Publication Date

1915

Pagination

42 pages

Rights

© 1915 Lister Merriken Cummings, All rights reserved.

Document Type

Thesis - Open Access

File Type

text

Language

English

Subject Headings

Bits (Drilling and boring) -- Testing
Rock-drills -- Testing

Thesis Number

T 356

Print OCLC #

5949093

Electronic OCLC #

319068994

Link to Catalog Record

Recommended Citation

Cummings, Lister Merriken, "Comparative tests of piston-drill bits" (1915). Bachelors Theses. 80.
https://scholarsmine.mst.edu/bachelors_theses/80