Spade drill

Details Spade drill Spade drill

1975-02-24

1976-06-29

Simpson, Othell M.

Cutting by use of rotating axially moving tool

Tool or tool with support

Having peripherally spaced cutting edges

408211, 408239R, B23B 5100

Patent

active

039663507

ABSTRACT:
A spade drill characterized in that the slotted blade clamping end of the holder has non-symmetrical oppositely disposed blade clamping faces, each of which extends close to the cutting end and cutting diameter of the blade on the side of the blade opposite to the side containing one cutting edge thus to provide firm support for said one cutting edge and is beveled at its end to provide a wide divergent passage for free passage of chips from the other cutting edge to the longitudinal obtuse angle groove of the holder which intersects such divergent passage at its wide end.

REFERENCES:
patent: 2400856 (1946-05-01), Thompson
patent: 2971409 (1961-02-01), Peters et al.
patent: 3076357 (1963-02-01), Benjamin et al.
patent: 3667768 (1972-06-01), Stokey

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