Accession Number:

AD0744989

Title:

Design, Fabricate and Test a Conical Borer

Descriptive Note:

Annual rept. Feb 1971-Feb 1972

Corporate Author:

FOSTER-MILLER INC WALTHAM MA

Personal Author(s):

Report Date:

1972-03-28

Pagination or Media Count:

61.0

Abstract:

The report summarizes effort completed during the first year of a proposed three-year effort to design, fabricate, and test a conical self- advancing and self-rotating boring machine. The conical borer will use a proven and economical mechanical fragmentation system - roller cutters - and will operate as a reaming device to enlarge an existing 8-34 inch pilot hole to a final 36 inch bore. The concept offers a substantial improvement over the present state-of-the-art, particularly in hard-rock boring applications and can be rapidly put to practical use using proven components.

Subject Categories:

  • Geology, Geochemistry and Mineralogy
  • Machinery and Tools

Distribution Statement:

APPROVED FOR PUBLIC RELEASE