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