Drilling and reaming

Details Drilling and reaming Drilling and reaming

1975-08-28

1976-09-28

Simpson, Othell M.

Cutting by use of rotating axially moving tool

Tool or tool with support

Having inversely angled cutting edge

408224, 408226, 408230, F16B 2500

Patent

active

039824640

ABSTRACT:
A self-drilling and reaming screw for clampingly securing a plurality of superimposed panels and providing a clearance hole in at least the upper panel. A plurality of axially spaced wings of differing and increasing radial dimension from the cutting edge of the drill point to the threaded shank portion are provided and located between the upper and lower extremities of the flutes on the drill point.

REFERENCES:
patent: 2897696 (1959-08-01), Tisserant
patent: 3358548 (1967-12-01), Dyslin
patent: 3665801 (1972-05-01), Gutshall
patent: 3699841 (1972-10-01), Lanius
patent: 3758222 (1973-09-01), Oakes
patent: 3869219 (1975-03-01), Wilson et al.

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