Rotatable cutting bit assembly with cutting inserts

Details Rotatable cutting bit assembly with cutting inserts Rotatable cutting bit assembly with cutting inserts

1997-07-15

2000-08-29

Tsay, Frank

Boring or penetrating the earth

Bit or bit element

Impact or percussion type

1754201, 175425, E21B 1238

Patent

active

061093777

ABSTRACT:
A rotatable cutting bit which comprises an elongate bit body which has a forward end and a rearward end and which defines a peripheral surface. The bit body contains a first seat at the axially forward end thereof. A first cutting insert is mechanically retained in the seat so as to present a clearance cutting edge which radially extends past the peripheral surface of the bit body. The first cutting insert has a leading cutting edge disposed at a lead angle between 50 degrees and 80 degrees.

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