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Auxiliary Handle/Depth Stop
Operate the machine only with the auxiliary
handle 3.
The drilling depth can be set with the depth
stop 1.
The ribbing on depth stop 1 must point upwards.
Inserting the Tool
Open the drill chuck 2 by turning until the tool can
be inserted. Insert the tool.
Clamp evenly in all three holes with the chuck
key.
Caution! The chuck may be very hot:
During longer working periods, especially
when impact drilling, the chuck can become
very hot. In this case we recommend wearing
protective gloves.
Starting Operation
Observe correct mains voltage: The voltage of
the power source must agree with the voltage
specified on the nameplate of the machine.
Equipment marked with 230 V can also be con-
nected to 220 V.
Switching On and Off
To start the machine, press the On/Off switch 7
and keep it depressed.
The machine runs with variable speed between 0
and maximum, depending on the pressure ap-
plied to the On/Off switch 7. Light pressure re-
sults in a low rotational speed thus allowing
smooth, controlled starts. Do not strain the ma-
chine so heavily that it comes to a standstill.
To lock on, push and hold the On/Off switch 7
and press the lock-on button 6.
To switch off the machine, release the On/Off
switch 7 or push and release it then.
Overload Clutchp
In order to limit dangerous reaction torque, the
machine is equipped with a safety clutch.
Nonetheless, high reaction torque can occur
when the tool insert suddenly jams. Always hold
the machine tightly with both hands and en-
sure secure footing.
Switch off the machine immediately when the
clutch disengages.
Gear Selection, Mechanical
Two speed ranges can be preselected with the
gear selector 4:
Speed I:
Lower rpm range
Speed II: Higher rpm range
Switch over only when the machine is at a
standstill or running down.
If the gear lever 4 cannot be completely switch
when the machine is at a standstill, turn the drill
chuck somewhat
Drilling and Impact Drilling
"Drilling/Impact Drilling" selector switch 5:
Switch over only when the machine is at a
standstill or running down.
Drilling
Impact Drilling
If the impact stop lever 5 cannot be completely
switch when the machine is at a standstill, turn
the drill chuck somewhat.
Tips
The required speed is dependent on the material
and can be determined by practical testing.
After longer periods of working at low speed, al-
low the machine to cool down by running it for ap-
prox. 3 minutes at maximum speed with no load.
For drilling in tiles, set the selector switch 5 to the
symbol "Drilling". Do not switch over to the sym-
bol "Impact Drilling" or work with impact until after
drilling through the tile.
Carbide tipped drill bits are required for jobs
when working in concrete, masonry and brick
wall.
Sharpening Drill Bits
For drilling in metal, use only perfectly sharpened
HSS drills. The appropriate quality is guaranteed
by the BTI accessories program.
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