Page 126 - HOLE MAKING CATALOG p001-148

INDEXABLE DRILLS USER GUIDE

Machining Conditions for Large Diameter DR-TWIST Drills

Material Vc (m/min) 57-66 dia. Feed (mm/rev) 74-80 dia.
67-73 dia.
Low Carbon Steel (<0.3% C) 180-250 0.08-0.12 0.09-0.14
0.08-0.12
Carbon Steel (>0.3% C) 160-220 0.12-0.18 0.14-0.21
Low Alloy Steel (<HB300) 150-220 0.10-0.18 0.12-0.18 0.12-0.21
High Alloy Steel (>HB300) 130-180 0.10-0.15 0.10-0.18 0.12-0.17
Stainless Steel 170-240 0.08-0.15 0.10-0.15 0.09-0.17
Cast Iron 180-250 0.15-0.22 0.08-0.15 0.17-0.25
Ductile Cast Iron 130-200 0.10-0.20 0.15-0.22 0.12-0.23
Aluminum 330-380 0.15-0.25 0.10-0.20 0.17-0.29
Ti Alloy (Ti 6AI) 0.12-0.16 0.15-0.25 0.14-0.18
30-60 0.12-0.16

124 ISCAR