Drill

Details Drill Drill

1988-08-05

1990-08-14

Howell, Daniel W.

Cutting by use of rotating axially moving tool

Tool or tool with support

Having peripherally spaced cutting edges

408229, B23B 5102

Patent

active

049483064

ABSTRACT:
A drill has a solid material shank (10), which is provided in its front region with a cold-forged drill point (11) with two cutting edges (12) approximately parallel to one another in projection and two flutes (13) running approximately in the longitudinal direction of the shank (10).

REFERENCES:
patent: 500213 (1893-06-01), Richards
patent: 2034514 (1936-03-01), Hayden et al.
patent: 2354985 (1944-08-01), Davis
patent: 4781506 (1988-11-01), Roberts et al.

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