locking means for securely locking said replaceable cutter shell to said rolling cutter shell by drawing said annular tapered inner surface of said replaceable cutter shell onto said tapered annular external surface of said rolling cutter shell thereby inducing {HEAD ~ a preload} into {TAIL ~ said annular tapered inner surface} of said replaceable cutter shell and said tapered annular external surface of said rolling cutter shell 
locking means for securely locking said replaceable cutter shell to said rolling cutter shell by drawing said annular tapered inner surface of said replaceable cutter shell onto said tapered annular external surface of said rolling cutter shell thereby inducing { HEAD ~ a preload } into { TAIL ~ said annular tapered inner surface } of said replaceable cutter shell and said tapered annular external surface of said rolling cutter shell
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