Hole cutter for hard materials such as ceramic tile

Details Hole cutter for hard materials such as ceramic tile Hole cutter for hard materials such as ceramic tile

1978-03-16

1979-04-03

Hinson, Harrison L.

Cutting by use of rotating axially moving tool

Tool or tool with support

Having axial, core-receiving central portion

408226, 408231, 408703, B23B 4102, B23B 5100

Patent

active

041474643

ABSTRACT:
A hole cutter for hard material such as ceramic tile. The cutter has a cylindrical body which has an axial opening and a pilot drill is mounted therein. The drill and the opening are non-circular, for example, hexagonal, in order to prevent relative rotation between the drill and the body. The body has a plurality of axially extending recesses in its periphery and an axially extending cutting blade which has an arcuate cross-section is positioned in each recess. The drill and the blades have carbide tips. The tips on the blades have beveled outer corners which prevent them from radially spreading when drilling and which minimize chipping the tile or its glaze. Mounting holes through the blades and in the recesses are spaced circumferentially away from their center lines to prevent improper mounting.

REFERENCES:
patent: 2468562 (1949-04-01), Lank
patent: 2853904 (1958-09-01), Mackey
patent: 3184827 (1965-05-01), Melvin
patent: 4072437 (1978-02-01), Smith et al.

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