Apparatus for drilling holes in a workpiece

Details Apparatus for drilling holes in a workpiece Apparatus for drilling holes in a workpiece

1994-02-09

1995-07-18

Howell, Daniel W.

Cutting by use of rotating axially moving tool

Tool or tool with support

Having axial, core-receiving central portion

408208, B23B 5104

Patent

active

054335604

ABSTRACT:
A hole cutting apparatus for use with a conventional drill and chuck. The apparatus features a self feed pilot bit and quick change drill bits which store on the apparatus. Hollow drill bits are provided which fit over a pilot bit and are fastened to the apparatus with a quick release pin. The pilot bit centers on the hole to be cut and the drill bit is used to cut a circular perimeter slot until through the workpiece. The apparatus fits in the chuck of a standard drill. The apparatus requires a relatively low torque from the drill motor to drill a large size hole when compared to conventional drilling systems.

REFERENCES:
patent: 1448697 (1923-03-01), Misener
patent: 1449790 (1923-03-01), Sprague
patent: 3220449 (1965-11-01), Franklin
patent: 3262474 (1966-07-01), Enders

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