Cutting tools

Details Cutting tools Cutting tools

1988-01-04

1989-08-08

Novosad, Stephen J.

Boring or penetrating the earth

Bit or bit element

Rolling cutter bit or rolling cutter bit element

175410, F21B 1052

Patent

active

048544051

ABSTRACT:
There are disclosed two embodiments of a hard metal insert adapted to be installed on the face of a cutting tool, each insert comprising inner and outer bodies having particles of carbide or other highly abrasive material sintered in a binder of cobalt or other less abrasive, but tougher metal, and having wear surfaces of their outer ends configured to form a tip on the outer end of the inner body, and wherein the particle size and/or chemical composition of the bodies are such that the inner body is harder, but less tough, than the outer body.

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