Rock drilling bit and a method of producing the same

Details Rock drilling bit and a method of producing the same Rock drilling bit and a method of producing the same

1988-04-25

1989-09-19

Parker, Roscoe V.

Metal tools and implements, making

Blank or process

Drill

76DIG2, B21K 502, F21B 1046

Patent

active

048670154

ABSTRACT:
A rock drilling bit comprises a steel body defining a cutting face with hard material inserts press-fitted into preformed openings in the cutting face. The inserts have ends extending outwardly of the cutting face which perform the actual drilling or cutting operation. The face surface of the body is case hardened except for narrow continuous bands about each insert opening. A method particularly suited for forming the case hardened cutting face is also disclosed.

REFERENCES:
patent: 4679640 (1987-07-01), Crawford

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