In an embodiment, the apparatus can be used for mounting {HEAD ~ an arm} on a bearing to form {TAIL ~ a pivot} 
In an embodiment , the apparatus can be used for mounting { HEAD ~ an arm } on a bearing to form { TAIL ~ a pivot }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL