Method and apparatus for drilling hardplate

Details Method and apparatus for drilling hardplate Method and apparatus for drilling hardplate

1989-06-09

1991-04-23

Abrams, Neil

Cutting by use of rotating axially moving tool

Processes

Bit detachable

408 57, 408145, 408204, B23B 2710

Patent

active

050095536

ABSTRACT:
A rotatable cutter bit for drilling a hole in the hardplate of burglar-resistant safes includes an elongate hollow barrel having diamond grit bonded in a matrix to the periphery of the work-drilling end and a beeswax core in the hollow working end. A method for drilling hardplate includes the step of rotating a diamond-tipped drill bit in the hardplate in the presence of beeswax in the drilling interface.

REFERENCES:
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patent: 4383785 (1983-05-01), Rice
patent: 4416788 (1983-11-01), Apikos
patent: 4483108 (1984-11-01), Howard

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