With the insert installed as shown in FIG 2, the holder can be rapidly rotated about its axis 20, to cause {HEAD ~ the cutting edge} 30 of {TAIL ~ the insert} to move about the axis 20 and cut a thread 
of
With the insert installed as shown in FIG 2 , the holder can be rapidly rotated about its axis 20 , to cause { HEAD ~ the cutting edge } 30 of { TAIL ~ the insert } to move about the axis 20 and cut a thread
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH