Drill reamer bit

Details Drill reamer bit Drill reamer bit

1989-07-03

1990-06-26

Bilinsky, Z. R.

Cutting by use of rotating axially moving tool

Tool or tool with support

Having stepped cutting edges

408230, B23B 5108

Patent

active

049367218

ABSTRACT:
A drill/reamer bit has a drill portion formed by cutting edges at the end of a plurality of flutes. A reamer portion is contiguous with the drill portion and includes a first relief formed on each flute surface disposed at a predetermined angle with respect to the flute surface to form a first reamer cutting edge. A second relief is formed contiguous with the first face on each reamer portion and is disposed at a second angle, less than the first angle with respect to the flute surface. Preferably, the angle of the first reamer relief is substantially 30.degree. and the angle of the second reamer relief is substantially 10.degree..

REFERENCES:
patent: 252074 (1882-01-01), Southwick
patent: 396663 (1889-01-01), Morisseau
patent: 1387994 (1921-08-01), Lewis
patent: 2389909 (1945-11-01), Hofbauer
patent: 2897695 (1959-08-01), Winslow
patent: 3779664 (1973-12-01), Caley et al.
patent: 4507028 (1985-03-01), Matsushita
patent: 4605347 (1986-08-01), Jodock et al.

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