Precision drill bit

Details Precision drill bit Precision drill bit

1998-03-31

2000-10-03

Howell, Daniel W.

Cutting by use of rotating axially moving tool

Processes

Bit detachable

408230, B23B 5102

Patent

active

061263672

ABSTRACT:
The following invention relates to a drill bit that will drill a round and precisely sized hole when using a hand-held drill motor. The bit has a unique multi-angle lip relief that cuts faster than a standard drill bit and stays sharp longer as well.

REFERENCES:
patent: 805170 (1905-11-01), Thomas
patent: 2193186 (1940-03-01), Bannister
patent: 2332295 (1943-10-01), Bouchal
patent: 2334845 (1943-11-01), Schwartz
patent: 2646701 (1953-07-01), Letien
patent: 3779664 (1973-12-01), Caley et al.
patent: 4480952 (1984-11-01), Jeremias
patent: 5056967 (1991-10-01), Hageman
patent: 5354155 (1994-10-01), Adams
patent: 5387059 (1995-02-01), Borzemsky
patent: 5570978 (1996-11-01), Rees et al.

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