The outer surface of the rolling cutter shell 48 slopes in wedge fashion and {HEAD ~ the inner surface} of {TAIL ~ replaceable cutter shell} 49 is of a corresponding shape 
of
The outer surface of the rolling cutter shell 48 slopes in wedge fashion and { HEAD ~ the inner surface } of { TAIL ~ replaceable cutter shell } 49 is of a corresponding shape
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH