Page 109 - Aluminum_Machining_catalog_2023

USER GUIDE

• Following is the recommended coolant • Prior to using 8D or 12D drills, it is recommended to
flow rate and pressure. drill a 1.5xD pre-hole using a short tool assembled
with same drilling head as for further operation
Coolant Flow Rate (liter/min) • Enter the pre-hole at slow speed and feed until 2-5 mm
30 from its bottom. Start the cooling system and increase
flow
rate rotation to the recommended drilling speed. Hold for 2-3
20 seconds, then continue at the recommended drilling feed.
10 1 Pre-hole for a 1.5xD depth for piloting. EXCHANGEABLE DRILLING HEADS
5

6.8 12 16 20 25 1.5xD
drill diameter D (mm)

Minimum Coolant Pressure (bar)

15
12 8 , 12 X D
5 X D 2 Enter the pre-hole at slow speed and
10 3 X D feed until 2-5 mm from its bottom.
1.5 X D
8
5

3
1.5xD
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
0.02 mm. Large runout will influence drill
performance tool life and hole quality.
• No setup time is needed after indexing
the SUMOCHAM drill head. 3 Start the cooling system and increase
• SUMOCHAM drills can be used either on rotation to the recommended drilling speed.
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 Hold for 2-3 seconds, then continue at
the recommended drilling feed.

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