Two cutting inserts are positioned in exactly opposed diametric positions, and engage {TAIL ~ the workpiece} in a substantially identical manner to precisely balance {HEAD ~ the radial forces} resulting from drill axially advancing though a workpiece 
Two cutting inserts are positioned in exactly opposed diametric positions , and engage { TAIL ~ the workpiece } in a substantially identical manner to precisely balance { HEAD ~ the radial forces } resulting from drill axially advancing though a workpiece
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH