Cutting by use of rotating axially moving tool – Tool or tool with support – With pitch-stabilizing ridge
Patent
1977-02-11
1978-09-26
Hinson, Harrison L.
Cutting by use of rotating axially moving tool
Tool or tool with support
With pitch-stabilizing ridge
408219, 408225, B23B 5100
Patent
active
041165780
ABSTRACT:
A rotary tool having a working part and a shank. The working part is formed by at least two axial portions of which the first portion is made with the profile of a twist drill for making a pilot hole, and the second portion is disposed axially between the first portion and the shank. The second portion is made in such a manner as to enlarge the pilot hole upon entering it and to ensure self-feed of the tool in the axial direction. This permits substantial reduction of required force for axial feed of the tool, improves productivity and allows making holes of different diameter with one and the same tool.
REFERENCES:
patent: 93824 (1869-08-01), Humphreys
patent: 213937 (1879-04-01), Reichardt
patent: 347864 (1886-08-01), Berg
patent: 410614 (1889-09-01), Steiner
patent: 1478414 (1923-12-01), Wells
patent: 2029514 (1936-02-01), Thomson
patent: 2735116 (1956-02-01), Mueller
patent: 2737670 (1956-03-01), Conner
Gelfand Mikhail Lvovich
Goldshtein Boris Grigorievich
Gornik Leonid Avrumovich
Shishulin Jury Pavlovich
Tsipenjuk Yakov Isaakovich
Adams Bruce L.
Burns Robert E.
Hinson Harrison L.
Lobato Emmanuel J.
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