Device for making a drilled hole with an undercut

Details Device for making a drilled hole with an undercut Device for making a drilled hole with an undercut

1993-04-22

1994-05-31

Bishop, Steven C.

Cutting by use of rotating axially moving tool

Machine frame

Including pivotally mounted tool-carrier

279 6, 408147, 409143, 409201, B23B 4100

Patent

active

053164199

ABSTRACT:
Device for producing a drilled hole with an undercut in a facing panel, consisting of a drilling machine and a drilling tool for forming the drilled hole connected to the drilling machine via an adapter for transferring torque; and a holding device of a supporting stand having a swivel bearing for holding the drilling machine so that it can swivel with the drilling tool attached to it. To extend the service life of the drilling tool the adapter consists of a drive part connected to the drilling machine so as to transfer torque and a tool holder connectable with the drive part and a device for releasably securing the tool holder to the drive part so that the center line of the tool holder is inclined relative to the center line of the drive part, which is aligned with the drive axis of the drilling machine, so that only a portion of the circumference of the drilling tool engages the panel during formation of the drilled hole. When the drilling tool is not being driven to form the drilled hole, the tool holder can be detached from the drive part, rotated relative to it and resecured to it so that a fresh engagement region of the drilling tool replaces a worn engagement region.

REFERENCES:
patent: 3978765 (1976-09-01), Scaduto
patent: 5226763 (1993-07-01), Lind

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