ver, the percussion mechanism must be switched off.
Switch-over by means of the sliding switch (4).
When in middle position, the reversing switch pre-
vents the accidental activation of the full wave elec-
tronic switch (1), for example when changing tools
or assembling/disassembling the drill chuck.
8. PERCUSSION DRILLING DEVICE
The machine has an integrated percussion
mechanism and can be switched from normal
drilling to percussion drilling. The sliding switch (4)
allows switching from normal drilling to percussion
drilling or vice-versa while the machine is in
operation.
Normal drilling position:
Move switch (4) to the right in direction of normal
drilling.
Percussion drilling position:
Move switch (4) to the left in direction of percussion
drilling.
9. CHUCK
The chuck is tightened with a turning moment of 35-
40 Nm. Only this guarantees that the chuck is not
unintentionally unwound from the drill spindle in an-
ticlockwise mode. Should the chuck be undone from
the drill spindle for the purpose of replacement, the
new chuck must be tightened with a turning moment
of at least 35-40 Nm before the machine is used
again.
The piane surfaces of the chuck and drill spindle
must be cleaned before a new chuck is mounted.
Caution!
Before disassembling and reassembling the drill
chuck, disconnect the machine from the power
supply.
Caution!
When turning anticlockwise, it is possible that the
chuck loosens itself from the spindle. For this reason
make sure that the chuck sits
10. OPERATING THE QUICK-CHANGE CHUCK
This chuck has been developed especially for use
with percussion drills.
The fully-automatic spindle locking device enables a
quick and problem-free tool change in the chuck
properly on the spindle.
The drill spindle will be automatically fixed when the
chuck is actuated.
The chuck has a release safety lock which prevents
any unintentional release of the drilling tool even at
high impact frequencies.
After attaching the jaw chuck to the tool, a slightly
higher torque must be used to engage the clamping
force safety lock. The torsion angle of the collar must
be approximately 50° during the locking procedure.
After this has been completed, the tool can be
tensioned as usual. Turn the collar firmly in the "ZU"
direction until a click is heard. The drill is only
properly tensioned when the collar has been turned
as far as possible and no more clicking is heard.
11. USE AS A SCREWDRIVER
Screwdriver inserts (bits) can fitted directly into the
chuck. Use Phillips screws for best results.
Safe operation is ensured by the self-centering
mechanism. Please make sure to use the correct
screwdriver inserts.
12. CUTTING THREADS
The integrated electronic and the reversal of the
direction of rotation makes the percussion drill also
suitable for cutting threads. The use of machine taps
is recommended. The tap is clamped into the chuck.
The electronic controls are sensitive and should be
handled with utmost care to prevent any breaking of
tap - particularly when cutting threads into blind
holes.
Important! When cutting threads, use Iow speeds
only.
Always make sure that the chosen speed is correct
for the purpose for which you are using the machine.
Also make sure that, using a gear-rim chuck, the drill
chuck key is never fastened to the drill with chains,
strings or by similar means. Be sure that the wor-
kpiece cannot be taken along by the drill.
13. MAINTENANCE
The machine's motor has life-time lubrication and re-
quires no special maintenance. However, should you
operate the machine on a continuous basis over long
periods of time we recommend that you send us the
machine for thorough cleaning and an inspection.
This will spara you unnecessary repair expenses and
increase the machine's service life. If you always
clean the ventilator of dust after each operation, the
motor will enjoy an ever longer service life. Uniform
ventilation is essential for a long service life.
14. REPLACING CARBON BRUSHES
Our service personn
15. MAINS CABLE
Damaged mains cables must not be used. They are
to be replaced immediately.
16. AUXILIARY HANDLE
For safety reasons the side handle should always be
used when working with the percussion drill. It
guarantees safe, wander-free guidance of the drill,
