Axial bearing for a roller drill bit

Details Axial bearing for a roller drill bit Axial bearing for a roller drill bit

1978-02-02

1980-02-26

Butler, Douglas C.

Cutlery

175329, 175330, 308DIG8, E21B 910

Patent

active

041903013

ABSTRACT:
An axial thrust bearing for a roller drill bit comprising a pair of one piece diamonds mounted in the axial end face of the journal and the interior of the cutting roller supported for rotation on the journal. Each diamond is mounted on a cup-shaped casing made of a softer metal than the journal and cutting roller. Preferably the confronting engaging bearing surfaces of the diamonds are spherical.

REFERENCES:
patent: 630574 (1899-08-01), Sturtevant
patent: 2592277 (1952-04-01), Hammer
patent: 2651501 (1953-09-01), McMahon
patent: 3127942 (1964-04-01), Neilson

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