SPARKY GUR 12Li-C HD Notice Originale page 10

be used for its intended purpose after switching it on
again.
REVERSING (Fig. 3)
The extreme position of forward/reverse switch (6) to the
right (viewed from the rear) is equivalent to anti-clock-
wise rotation, the extreme position to the left - to clock-
wise rotation. When the ON/OFF switch (5) is depressed
switch (6) cannot be actuated.
With the forward/reverse switch (6) in neutral position,
ON/OFF switch (5) cannot be pressed and the machine
cannot be operated.
WARNING: Reversing can be performed only
when the spindle is not rotating!
Drilling and tightening screws are performed with lever
in extreme position to the left. Removal of screws is per-
formed with lever in extreme position to the right.
SWITCHING ON - SWITCHING OFF
Switching on: press ON/OFF switch (5).
Switching off: release ON/OFF switch (5).
This power tool is equipped with electric brake. The spin-
dle stops rotating immediately after releasing the switch
lever.
SMOOTH ELECTRONIC SPEED / TORQUE
CONTROL
Light pressure on ON/OFF trigger switch (5) results in
low rotation speed, further pressing the switch results in
smooth increase of the rpm to maximum upon reaching
the extreme position.
The lower the rotating speed, the lower is the tightening
torque. Maximum tightening torque is achieved at maxi-
mum speed of the power tool.
WARNING: Prolonged operation with the
electronic control at low rpm may overload or damage
the regulator.
INSERTING AND REMOVING BITS (Fig. 4):
WARNING: Remove the battery or set the
forward/reverse switch (6) in central (neutral) position.
Inserting the bit:
1. Pull the locking sleeve (1) forward.
2. Insert the bit into the hexagonal socket of the tool
holder (2)
3. Release the locking sleeve. It will return in its initial
position and secure the bit.
WARNING: If the locking sleeve does not re-
turn to its original position, then the bit has not been
installed properly. Move the bit slightly back and forth
until the locking sleeve returns back in initial position.
8
EN
When mounting the operating tool, make sure it is reli-
ably fastened in place, otherwise it may get out uncon-
trollably during operation.
Removing the bit:
Pull the locking sleeve forward and keep it in this position
to remove the bit
OPERATING THE TOOL
Impact operation starts automatically when the load ex-
ceeds certain level. Pushing the trigger switch at no load
will result only in change of speed.
The fastening torque depends on the duration of impact
operation. Generally, maximum torque is achieved after
5 seconds of impact operation. Further operation will
result only in slight torque increase. Prolonged impact
operation may cause motor damage or burning.
The torque depends on the length, grade and diameter
of the screw. It depends also on the strength of material
to be fastened (wood, metal, etc.) and the type of washer
used. Operate the tool after calculating the appropriate
impact operation time by performing a trial fastening
and measuring the actually achieved torque by a torque
wrench.
The torque depends on the length, grade and diameter
of the screw. It depends also on the rigidness of material
to be fastened (wood, metal, etc.) and the type of washer
used. Operate the tool after calculating the appropriate
impact operation time by performing a trial fastening
and measuring the actually achieved torque by a torque
wrench.
WARNING: Power tool with a faulty switch is
dangerous and shall be repaired before use.
SCREWING / UNSCREWING
Install a bit that matches the screw, align the bit into the
grooves of the screw head, and then tighten it.
Push the impact driver just enough to keep the bit in con-
tact with the screw head.
WARNING: Overtightening may result in
breaking the screw or damaging the bit!
Applying the impact driver for too long may tighten the
screw too much and break it.
▪ Tightening with the impact driver not aligned with the
screw may damage the screw head and the driving
force will not be transmitted properly to the screw.
▪ Before screwing large long screws into hard material,
it is advisable to pre-drill a pilot hole with the core di-
ameter of the thread to depth approx. 2/3 of the screw
length.
GUR 12Li-C HD