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 {HEAD ~ axes} transverse to 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 { HEAD ~ axes } transverse to 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 HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH