A shoulder 53 of {HEAD ~ the replaceable cutter} opposes {TAIL ~ the shoulder} 52 on rolling cutter shell 48 
opposes
A shoulder 53 of { HEAD ~ the replaceable cutter } opposes { TAIL ~ the shoulder } 52 on rolling cutter shell 48
OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH