Page 86 - HOLE_MAKING_CATALOG_INCH_2022_P1-P186

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

drill a 0.5xD pre-hole using a short or centering drill.
alloys using the ICM drilling head, it is highly
recommended to apply high-pressure oil or
Enter the pre-hole at slow speed and feed until .08-.2”
7-10% mineral or vegetable based oil emulsion.
from its bottom. Start the cooling system and increase
• Following is the recommended coolant
rotation to the recommended drilling speed. Hold for 2-3
flow rate and pressure.
seconds, then continue at the recommended drilling feed.
Coolant Flow Rate
gallon/min
7.92
flow
rate 1 Pre-hole 0.5xD deep for centering
5.28 0.5xD
2.64
1.32

.27 .47 .63 .80 1.0
Drill Diameter D (inch) 2 Slow rotation and feed while entering the pre-hole
Minimum Coolant Pressure
PSI
1.5xD
217
174 8, 12X D
5 X D
145
3 X D
1.5 X D
116
72
43

.27 .47 .63 .80 1.0
3 Maintain for 2-3 seconds and
Drill diameter D (inch) activate the cooling system

• For optimal performance, it is recommended to adjust
runout of outer points or chisel with a maximum of
.001”. Large runout will influence drill
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 a SUMOCHAM drill in a stationary
(lathe) applications, use the ISCAR GYRO device 4 Continue drilling at recommended cutting conditions
or eccenter sleeve to reduce misalignment.
Misalignment will cause poor performance of the
SUMOCHAM drill or even tool breakage.

84 ISCAR