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