D2X
D2X Operator’s Manual
15
3.6. Drilling
Use the gear switch to set the speed based on the following table.
Tool
Hole diameter
Rotational speed*
[rpm]
[mm]
[in.]
Annular cutter
12
–35 0.47–1.38
400 (gear II)
36
–50 1.38–1.97
200 (gear I)
Twist drill bit
3.5
–13 0.14–0.51
400 (gear II)
14
–23 0.55–0.91
200 (gear I)
* for sharp tool and mild steel with a shear strength
R
m
< 500 N/mm
2
(70,000 psi),
such as for instance St0 (S185), St3S (S235JR), or St4W (S275JO)
Steel with a shear strength
R
m
= 500
–700 N/mm
2
(70,000
–100,000 psi), such
as
for
instance
St5
(E295),
18G2A
(S355N),
or
45
(C45),
requires
lower rotational speed.
If the speed is selected too high or low for the shear strength and the type/diameter of
the tool, the tool will wear faster or be unable to drill the hole.
Start the motor using the green MOTOR button and slowly rotate the spoke
handles to the left to lower the tool to the workpiece, and begin drilling.
When using annular cutters, drill holes in one pass.
When using drill bits, drill holes with diameters of
18
–23
mm (0.71
–0.91’’) in two
passes. Drill a first hole using a drill bit with the 70% diameter of the hole size desired,
and then drill again using the bit with diameter equal to the hole size desired.
After
the
drilling
depth
exceeds
40
mm
(1.6’’),
apply
the
cutting
fluid
manually into
the drilling area.
After the hole is made, retract the tool from the workpiece and press the red
MOTOR button to stop the motor. Before moving the machine to another drilling spot,
set
the MAGNET switch to the position ‘O’ to turn off the electromagnetic base.
After the work is finished and the motor is stopped, switch to the opposite gear
(for instance from gear I to II), and then run the machine
for
a
while
without
load,
which will improve lubricity. Next, turn off the motor and the electromagnetic base,
unplug the machine from the power source, clean chips and excess coolant from the
machine and tool, and then remove the machine from the worksite.
Tighten the bottle cap, close the valve, and then press the pilot pin to expel the
coolant remaining within the cooling system. Before inserting the machine into
the
tool
box,
remove the bottle, and then wear gloves to remove the tool from the holder.
When the annular cutter goes through the workpiece, the slug
core is expelled from the cutter with a significant force.
