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