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