Rock bit with welded bearing pins

Details Rock bit with welded bearing pins Rock bit with welded bearing pins

1977-06-17

1978-11-28

Whitehead, Harold D.

Metal tools and implements, making

Blank or process

Drill

175369, E21B 908

Patent

active

041270436

ABSTRACT:
A rock bit and manufacturing method wherein journal-bearing pins which support rotatable cutters on the bit body are separately machined and heat treated, and then mounted on the bit body by electron-beam welding or a related process of energy-beam bonding.

REFERENCES:
patent: 2076002 (1937-04-01), Reed
patent: 3850256 (1974-11-01), McQueen
patent: 4043411 (1977-08-01), Lichte

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