Page 126 - ISCAR(HOLE_MAKING_CATALOG_65)

USER GUIDE
INDEXABLE DRILLS Material Vc (m/min) 57-66 dia. Feed (mm/rev) 74-80 dia.

Machining Conditions for Large Diameter DR-TWIST Drills

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

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