Wood drill and method of construction

Details Wood drill and method of construction Wood drill and method of construction

1984-08-07

1986-12-02

Weidenfeld, Gil

Metal tools and implements, making

Blank or process

Drill

408211, 408214, B23B 2718

Patent

active

046255931

ABSTRACT:
A wood drill and method for its manufacture are disclosed. A drill body has an axial web with spiral lands and a holding shank. The top of the web has an axial hole receiving a projection from a separate lead screw and the top of each spiral land has a recess receiving a carbide insert for cutting. The lead screw and carbide cutting inserts are fixed to the drill body and the inserts and lands are ground to provide the proper hole sizing tips and cutting surfaces. The elements are fixed so that they can be removed for repair; they are shown as being brazed. The spiral lands can be contoured to have a spiral groove located in one or more spiral surfaces inwardly from the outer end.

REFERENCES:
patent: Re19182 (1934-05-01), Emmons
patent: Re28900 (1976-07-01), Byers
patent: 285440 (1883-09-01), Swan
patent: 1556655 (1925-10-01), Whitney
patent: 4222690 (1980-09-01), Hosoi

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