Earth boring bit packed lubrication system
Patent
·
OSTI ID:6358866
A rolling cone cutter earth boring bit is provided with an improved lubrication system including an eccentric bearing surface and spaces for lubricant. At least one cantilevered bearing pin extends from the arm of the bit. A rolling cone cutter is rotatably mounted on the bearing pin. The outer bearing surface of the bearing pin is provided with a pair of grooves. The unloaded side surface of the outer bearing surface is formed by eccentric machining. Reduced clearance is provided between the rolling cone cutter and the load side surface and increased clearance is provided between the rolling cone cutter and the unloaded side surface. The pair of grooves and the increased clearance serve as a lubricant reservoir in close proximity to the load side of the bearing pin.
- Assignee:
- Dresser Industries Inc
- Patent Number(s):
- US 4244430
- OSTI ID:
- 6358866
- Country of Publication:
- United States
- Language:
- English
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