As the first and second rotatable portions of the machine are brought toward one another, {HEAD ~ the wedge members} act on {TAIL ~ the tapered surfaces} of the sleeve forcing the sleeve to radially expand and firmly grip the work piece 
As the first and second rotatable portions of the machine are brought toward one another , { HEAD ~ the wedge members } act on { TAIL ~ the tapered surfaces } of the sleeve forcing the sleeve to radially expand and firmly grip the work piece
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH