Thin wall sintered bushing for a rock bit

Details Thin wall sintered bushing for a rock bit Thin wall sintered bushing for a rock bit

1981-05-12

1983-09-06

Footland, Lenard A.

Bearings

Rotary bearing

Roller drill bit

F16C 3312

Patent

active

044026170

ABSTRACT:
A rotary rock bit having a relatively thin-walled porous journal bushing, infiltrated with an anti-galling metal, is shown. The bushing is mounted within the rolling cone cutter and retained axially by abutments and rotationally by an interference fit in conjunction with a metallic conformal layer at the interferingly engaging surfaces to prevent movement of the bushing with respect to the cutter under bit operating conditions.

REFERENCES:
patent: 4207658 (1980-06-01), Sorenson
patent: 4260203 (1981-04-01), Garner
patent: 4320931 (1982-03-01), Shaffer

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