The disc is mounted to the shaft by {TAIL ~ a bearing} which permits motion of {HEAD ~ the disc} in rotation about the shaft axis and about axes transverse to the shaft axis 
The disc is mounted to the shaft by { TAIL ~ a bearing } which permits motion of { HEAD ~ the disc } in rotation about the shaft axis and about axes transverse to the shaft axis
OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH