A cutter with a replaceable cutting element is adapted to be mounted upon the rotary head of {HEAD ~ an earth boring machine} or upon the body of {TAIL ~ an earth boring bit} 
A cutter with a replaceable cutting element is adapted to be mounted upon the rotary head of { HEAD ~ an earth boring machine } or upon the body of { TAIL ~ an earth boring bit }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL