Rotary cutting bit with material-deflecting ledge

Abstract

A cutting bit includes a body having a front surface and a side surface, the side surface including a shoulder below the front surface and extending substantially perpendicular to a central axis of the body, and a ring that is harder than the body attached to the body at a front surface of the shoulder. Wear life of the cutting bit is enhanced by maintaining particular dimensional relationships regarding the position of the ring on the body, and the diameter of portions of the body.

1 . A cutting bit, comprising: 
 A body having a front surface and a side surface, the side surface including a shoulder below the front surface and extending substantially perpendicular to a central axis of the body, the body being no larger in diameter above the shoulder than at the shoulder; and    a ring that is harder than the body attached to the body at a front surface of the shoulder.    
   
   
       2 - 26 . (canceled)