For {HEAD ~ effective transporting} away of {TAIL ~ chips}, the main flute and the reamer flutes preferably have the same helix orientation 
away of
For { HEAD ~ effective transporting } away of { TAIL ~ chips } , the main flute and the reamer flutes preferably have the same helix orientation
OTH HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH