Drilling tool formed of a core-and-casing assembly

Details Drilling tool formed of a core-and-casing assembly Drilling tool formed of a core-and-casing assembly

1987-01-14

1989-03-21

Bilinsky, Z. R.

Cutting by use of rotating axially moving tool

With means to apply transient, fluent medium to work or product

Including tool with duct

408144, 408230, B23B 5102, B23B 5106

Patent

active

048138231

ABSTRACT:
A drilling tool which has at least one helical fluid flow channel at its interior, is composed of a hard metal core having an exterior surface and a hard metal tubular casing having an interior surface. The casing encloses the core with their surfaces in firm contact so that the core and casing form a composite body. Each channel is formed as a groove in the surface of the core or casing.

REFERENCES:
patent: 3017790 (1962-01-01), Werle
patent: 3085453 (1963-04-01), Mossberg
patent: 3791660 (1974-02-01), Bostley
patent: 4583888 (1986-04-01), Mori et al.
patent: 4704055 (1987-11-01), Guhring

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