Drill and self-centering cutter insert therefor

Details Drill and self-centering cutter insert therefor Drill and self-centering cutter insert therefor

1991-09-23

1993-06-22

Neuder, William P.

Boring or penetrating the earth

Bit or bit element

Impact or percussion type

175426, 175432, E21B 1301

Patent

active

052209679

ABSTRACT:
A drill for cutting holes in mine roofs comprises a shank and a wedge shaped carbide cutting insert frictionally clamped within a wedge-shaped slot formed in the front end of the shank. The insert and slot include a tongue-and-recess connection which radially centers the insert within the slot.

REFERENCES:
patent: 993972 (1911-05-01), English
patent: 2097030 (1937-10-01), Killgore
patent: 3006424 (1961-10-01), Dahlin et al.
patent: 3749190 (1973-07-01), Shipman
patent: 4109737 (1978-08-01), Bovenkerk
patent: 4199035 (1980-04-01), Thompson
patent: 4313506 (1982-02-01), O'Connell
patent: 4782903 (1988-11-01), Strange

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