With either embodiment a drive is operably connected to the shaft for causing {HEAD ~ the shaft} to rotate about {TAIL ~ its axis} and a drum mounted on the shaft to rotate with the shaft 
to rotate about
With either embodiment a drive is operably connected to the shaft for causing { HEAD ~ the shaft } to rotate about { TAIL ~ its axis } and a drum mounted on the shaft to rotate with the shaft
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH