The cutting head at each end of the insert is provided with {HEAD ~ an upper chip surface} 13, which is provided with {TAIL ~ a chip forming device} in the form of a number of recesses 14, each of which has concave cross section 
The cutting head at each end of the insert is provided with { HEAD ~ an upper chip surface } 13 , which is provided with { TAIL ~ a chip forming device } in the form of a number of recesses 14 , each of which has concave cross section
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH