Fabrication method for chamfered hole

Details Fabrication method for chamfered hole Fabrication method for chamfered hole

1987-04-09

1989-01-31

Olszewski, Robert P.

Abrasive tool making process, material, or composition

Impregnating or coating an abrasive tool

51206R, 51209R, 408 1R, 408 27, 407 54, B24B 908

Patent

active

048006866

ABSTRACT:
This invention relates to a method for boring a chamfered hole and a tool for the same hole to effect boring a through hole on a glass plate and to simultaneously effect chamfering on respective aperture on the both sides of the plate, and have the function to enable speedy and accurate boring work without bringing forth defective product with chipping-off, joggles on the glass plate.

REFERENCES:
patent: 152442 (1874-06-01), Walters et al.
patent: 2276610 (1942-03-01), Clerici
patent: 2978846 (1961-04-01), Barron
patent: 4483108 (1984-11-01), Howard
patent: 4634379 (1987-01-01), Nash

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