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

1986-12-23

1988-07-12

Novosad, Stephen J.

Boring or penetrating the earth

Bit or bit element

Magnetized or with magnet

175410, E21B 1046

Patent

active

047563737

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: 4014395 (1977-03-01), Pearson
patent: 4607712 (1986-08-01), Larsson
patent: 4647111 (1987-03-01), Bonder et al.

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