Pilot drill bit

Details Pilot drill bit Pilot drill bit

1993-06-21

1994-07-05

Howell, Daniel W.

Cutting by use of rotating axially moving tool

With means to apply transient, fluent medium to work or product

408 57, 408225, B23B 5102, B23B 5106

Patent

active

053261968

ABSTRACT:
A pilot drill bit includes a shank, with an abutment flange mounted fixedly to the shank, and coaxially aligned relative to the shank and the abutment flange are a plurality of drill sections of decreasing diameter terminating in a tip, with the sections arranged and sized for drill taps.

REFERENCES:
patent: 2867140 (1959-01-01), Setts
patent: 4116578 (1978-09-01), Selfard et al.
patent: 4561812 (1985-12-01), Linden

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