Drill bit

Details Drill bit Drill bit

1976-06-11

1978-02-21

Goodman, Philip

Cutlery

308241, F16C 1900

Patent

active

040749223

ABSTRACT:
A roller cutter drill bit comprises a body having a journal, a roller cutter, bearing means for rotatively mounting a roller cutter on the journal and a part of said bearing means including a hard, tough metal bushing with a lubricant metal coated thereon, and positioned between the sleeve and the journal and between the sleeve and the roller cutter to prevent galling.

REFERENCES:
patent: 3990751 (1976-11-01), Murdoch

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