Machining Conditions for Large Diameter DR-TWIST Drills

MtilV /iFeed(mm/rev)
aerac (mmn)57-66 dia.67-73 dia.74-80 dia.
Low Carbon Steel (180-2500.08-0.120.08-0.120.09-0.14
Carbon Steel(>0.3% C)160-2200.12-0.180.12-0.180.14-0.21
Low Alloy Steel(150-2200.10-0.180.10-0.180.12-0.21
High Alloy Steel(>HB300)130-1800.10-0.150.10-0.150.12-0.17
Stainless Steel170-2400.08-0.150.08-0.150.09-0.17
Cast Iron180-2500.15-0.220.15-0.220.17-0.25
Ductile Cast Iron130-2000.10-0.200.10-0.200.12-0.23
Aluminum330-3800.15-0.250.15-0.250.17-0.29
Ti Alloy (Ti 6AI)30-600.12-0.160.12-0.160.14-0.18