Method of drilling bores

Details Method of drilling bores Method of drilling bores

1991-08-30

1992-09-01

Howell, Daniel W.

Cutting by use of rotating axially moving tool

Processes

Bit detachable

408 72B, 408204, B23B 3500

Patent

active

051434890

ABSTRACT:
In drilling a bore in a structural component (3) using a hollow cylindrical core drill bit (4) initially a guide such as a disk (1) or a template (12) is secured to the surface of a structural component (3) for guiding one of the inner or outer circumferential periphery of the core drill bit. At the commencement of the drilling operation, the core drill bit (4) is guided by the disk or template and maintains the bit in a centered position. The guide can be fixed to the surface of the structural component (3) in a known manner, such as by an adhesive or by fastening elements (2, 6) driven directly into the structural component. Generally core drill bits of smaller diameter can be guided by the outer circumferential periphery of the guide (2) or by the inside circumferential periphery of the template (12).

REFERENCES:
patent: 3308689 (1967-03-01), Macdonald
patent: 4023907 (1977-05-01), Clang
patent: 4500234 (1985-02-01), Orth et al.
patent: 4978255 (1990-12-01), Gale et al.

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