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Set the rotational direction switch 7 to the centre posi-
tion in order to avoid unintentional starting. Insert the
charged battery 6 into the handle so that it can be felt
to engage and faces flush against the handle.
Reversing the Rotational Direction
(see figure E)
The rotational direction switch 7 is used to reverse the
rotational direction of the machine. However, this is
not possible with the On/Off switch 8 actuated.
Right Rotation: For drilling and driving in screws,
push the rotational direction switch 7 left to the stop.
Left Rotation: For loosening or unscrewing screws,
push the rotational direction switch 7 right to the stop.
Setting the Torque
With the torque presetting ring 2 the required torque
setting can be preselected in 20 steps. With the cor-
rect setting, the insert tool is stopped as soon as the
screw is screwed flush into the material or when the
adjusted torque is reached. The safety clutch is deac-
tivated in the "
" position, e. g. for drilling.
Select a higher setting or switch to the "
when unscrewing screws.
Gear Selection, Mechanical
Actuate the gear selector 3 only when the
machine is at a standstill.
Two speed ranges can be preselected with the gear
selector 3.
Gear I:
Low speed range; for screwdriving or working with
large drilling diameter.
Gear II:
High speed range; for working with small drilling diam-
eter.
If the gear selector 3 cannot be pushed through to the
stop, lightly turn the drill chuck with drill.
Switching On and Off
To start the machine, press the On/Off switch 8 and
keep it pressed.
To switch off the machine, release the On/Off switch 8.
Adjusting the Speed
The speed of the switched on power tool can be vari-
ably adjusted, depending on how far the On/Off
switch 8 is pressed.
Light pressure on the On/Off switch 8 results in a low
rotational speed. Further pressure on the switch
results in an increase in speed.
Fully automatic spindle locking (Auto-lock)
When the On/Off switch 8 is not pressed, the drill
spindle and thus the tool holder are locked.
This enables screws to be screwed in, even when the
battery is empty and allows for the machine to be used
as a screwdriver.
28 | English
Run-on Brake
When the On/Off switch 8 is released, the chuck
brakes to a stop, thus preventing the run-on of the
tool.
When driving in screws, wait until the screw is
screwed in flush with the material and then release the
On/Off switch 8. By doing so, the head of the screw
does not penetrate into the material.
Working Advice
Apply the power tool to the screw only when
it is switched off. Rotating tool inserts can slip
off.
Tips
After longer periods of working at low speed, allow
the machine to cool down by running it for approx.
3 minutes at maximum speed with no load.
For drilling in metal, use only perfectly sharpened HSS
drill bits (HSS=high-speed steel). The appropriate
quality is guaranteed by the BTI accessories program.
" symbol
Before screwing larger, longer screws into hard mate-
rials, it is advisable to predrill a pilot hole with the core
diameter of the thread to approx.
length.
Maintenance and Service
Maintenance and Cleaning
Before any work on the machine (e. g., main-
tenance, tool change, etc.) as well as during
transport and storage, set the rotational
direction switch to the centre position. Unin-
tentional actuation of the On/Off switch can lead
to injuries.
For safe and proper working, always keep
the machine and ventilation slots clean.
If the machine should fail despite the care taken in
manufacturing and testing procedures, repair should
be carried out by an after-sales service centre for BTI
power tools.
In all correspondence and spare parts orders, please
always include the 6-digit order number given on the
nameplate of the machine.
2
/
of the screw
3
1 609 929 S52 • 16.1.09
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