D3X RS
D3X RS Operator’s Manual
17
3.8. Drilling
Use the gear switch to set the speed based on the following table.
Tool
Hole diameter
Rotational speed*
[rpm]
[mm]
[in.]
Annular cutter
12–34 0.47–1.34
210–420 (gear II)
35–75 1.38–2.95
80–160 (gear I)
Twist drill bit
8–17 0.31–0.67
210–420 (gear II)
18–32 0.71–1.26
80–160 (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.
Set the rotation direction switch to the position ‘R’, and start the motor using the
green MOTOR button. Slowly rotate the spoke handles to the left to lower the tool to
the
workpiece,
and
begin
drilling.
Next,
use
the speed adjustment knob to set a speed
suitable for given process conditions.
When using annular cutters, drill holes in one pass.
When using drill bits, drill holes with diameters of
18–32
mm (0.71–1.26’’) 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.
When drilling holes deeper than 50 mm (2’’), retract the tool above the workpiece
as often as possible to allow chips to be removed from the hole. If the grooves of the
tool are clogged, stop the motor and use a brush to clean them. After the drilling depth
exceeds 40 mm (1.6’’), apply the cutting fluid manually into the drilling area.
If the operation results in an overload, caused by insufficient cooling, using dull
tool, or too fast feed in relation to the tool diameter, the machine will automatically stop.
In such a case, to restart the machine, press the red MOTOR button, retract
the
tool
from the workpiece,
and then press the green MOTOR button (the electromagnetic
base must remain powered).
When the annular cutter goes through the workpiece, the slug
core is expelled from the cutter with a significant force.
