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RPM Control
Light pressure on the ON-OFF switch (5) results in low
rotational speed, thus allowing drilling to begin in a
smooth, controlled manner.
Further pressure on the switch results in an increase in
speed.
RPM Preselection
The desired rotational speed can be preselected with
the thumbwheel (8) (also possible during operation).
The rotational speed to be used depends upon the mate-
rial and can be determined in actual practice.
For higher loading of the machine, always set the con-
trol (8) to the maximum speed.
After long periods at low operating speed, run the drill
at high speed and without load for approx. 3 minutes.
Speed selection
Two rpm ranges can be preselected with the speed
selector switch (10):
Speed 1: Lower rpm range
Speed 2: Higher rpm range
The speed can be switched during drill oper-
ation. However, this should not be done
while operating at full load.
The rotation speed can be electronically adjusted
within these ranges.
Percussion drilling
To switch on the impact mechanism, press the switch
(11) below the spindle collar (2).
To switch off, pull out the switch (11).
Tungsten carbide drill bits are required for drilling con-
crete, stone and masonry.
Changing rotational direction
Set rotational direction selector (4) to R (right or clock-
wise) or L (left or anticlockwise). The reversing or
anticlockwise operation enables application for tasks
such as loosening of screws.
Rotational direction selector (5) is locked when ON-
OFF switch is activated.
Change rotational direction only when machine is
not running.
Changing the ring gear chuck (illustr.)
Use an open-end spanner (22 - SW 22) on spanner sur-
face (18) to hold spindle. Place the chuck key (16) in
one of the 3 bores and loosen the chuck by turning it to
the left using the key as a lever. If the chuck is frozen
in place, a tap on the chuck key (16) should loosen it.
ENGLISH
Practical advice
Sharpening drill bits
Only HSS drill bits in perfect condition (HSS = high
speed steel) should be used for drilling metal.
Bench Stand
We recommend the use of a bench stand
for work where greater precision is required.
Machine vice
Clamp work pieces tight for drilling, i.e.., using the
machine vice. This keeps the work piece from
from turning and thus prevents resulting accidents.
Drilling tiles
Set selector switch (11) to the drill symbol. Wait until
the tile has been completely penetrated before switch-
ing over to the hammer symbol and continuing with
percussion drilling.
Storage
The unit should be stored in a dry place where it is pro-
tected against freezing.
Environmental Protection
Do not open worn out machines and return to the col-
lection facilities provided for recycling.
Maintenance
K The ventilation slots (9) on the motor casing
should be cleaned out from time to time.
K After approx. 100 hours of operation, check the
motor brushes and replace if necessary. Clean the
motor housing.
K After approx. 200 hours of operation, renew the
grease filling in the gearbox.
To verify that the protective insulation remains
intact, the machine must be subjected to a tech-
nical safety test afterwards. For this reason, this
work must be performed exclusively by a pro-
fessional electro-workshop.
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