Page 70 - ISCAR(HOLE_MAKING_CATALOG_65)

USER GUIDE
INDEXABLE DRILLS • When drilling stainless steel or high temperature • Prior to using 8D or 12D drills, it is recommended to drill a

alloys using the ICM drilling head, it is highly
0.5xD pre-hole using a short or centering drill.
recommended to apply high-pressure oil or 7-10%
Enter the pre-hole at slow speed and feed until 2-5 mm
mineral or vegetable based oil emulsion.
from its bottom. Start the cooling system and increase
rotation to the recommended drilling speed. Hold for 2-3
• Following is the recommended coolant
flow rate and pressure.
seconds, then continue at the recommended drilling feed.
Coolant Flow Rate (liter/min)
30

rate
20
10 flow 1 Pre-hole 0.5xD deep for centering
0.5xD
5

6.8 12 16 20 25
Drill Diameter D (mm)
Minimum Coolant Pressure (bar)
2 Slow rotation and feed while entering the pre-hole
15
12 8, 12X D
5 X D
10 3 X D
8 1.5 X D
1.5xD
5

3
6 12 16 20 25
Drill Diameter D (mm)

• For optimal performance, it is recommended to adjust
runout of outer points or chisel with a maximum of 3 Maintain for 2-3 seconds and
0.02 mm. Large runout will influence drill activate the cooling system
performance tool life and hole quality.
• No setup time is needed after indexing
the SUMOCHAM drill head.
• SUMOCHAM drills can be used either on
milling centers or lathe machines.
• When using SUMOCHAM drill in stationary (lathe)
applications, we recommend using the ISCAR GYRO
device or eccenter sleeve to reduce misalignment.
Misalignment will cause poor performance of the
SUMOCHAM drill or even tool breakage.
4 Continue drilling at recommended cutting conditions

68 ISCAR