forming at least part of the periphery of the motor member with an exterior diameter greater than that of {HEAD ~ the bore} of {TAIL ~ the jacket member} 
of
forming at least part of the periphery of the motor member with an exterior diameter greater than that of { HEAD ~ the bore } of { TAIL ~ the jacket member }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL