The chuck is mounted within {TAIL ~ a carrier} having a bore for a shaft portion of {HEAD ~ the chuck} 
The chuck is mounted within { TAIL ~ a carrier } having a bore for a shaft portion of { HEAD ~ the chuck }
OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD