Bosch psr 12 Bedienungsanleitung Seite 10

2 609 932 475.book Seite 3 Dienstag, 14. Juni 2005 3:05 15
Switching On and Off
To start the machine, press the On/Off switch 4
and keep it depressed.
The machine runs with variable
speed between 0 and maximum,
depending on the pressure applied
to the On/Off switch 4. Light pres-
sure results in a low rotational
speed thus allowing smooth, con-
trolled starts. Do not strain the machine so heav-
ily that it comes to a standstill.
To switch off the machine, release the On/Off
switch 4.
Gear Selection, Mechanical
Two speed ranges can be preselected with the
gear selector 1:
1st gear: Low rotational speed, high power.
2nd gear: High rotational speed, less power.
The speed settings may only be changed when
the machine is motionless. If the speed setting
has not quite notched in properly, briefly press
the On/Off switch 4.
Fully Automatic Spindle Locking
(Auto-Lock)
The drill spindle is locked when the On /Off
switch 4 is not pressed.
This makes quick and easy changing of the tool
in the drill chuck possible.
Setting the Torque
With the correct setting, the clutch disengages as
soon as the screw is driven flush into the material
or when the set torque is reached. Select a higher
setting when driving out screws, or set to the
"Drilling" symbol.
Low setting, e. g., small screws, soft
1
materials.
High setting, e. g., large screws, hard
25
materials.
Drilling
Set the torque setting ring 2 to the "Drill-
ing" symbol.
10 • 2 609 932 475 • TMS • 06.06.05
Replacing the Drill Chuck
Before any work on the machine itself, remove
the battery.
The locking screw 12 secures the drill chuck
against loosening from the drill spindle. Fully
open the drill chuck and completely unscrew the
locking screw 12 by turning in clockwise direction
B
(see figure ).
Loosening the Drill Chuck
(see figure )
C
Place the machine on a stable surface (e. g.
workbench). Hold the machine firmly and loosen
the chuck by turning to the left, as when unscrew-
ing a screw ( ). Loosen a tight chuck by giving
the long end of the Allen key 13 a sharp blow.
Tightening the Drill Chuck
(see figure )
D
The drill chuck is mounted in reverse order ( ).
Operating Instructions
Apply the power tool to the screw /nut only
when it is switched off.
Use only screwdriver blades/bits that fit prop-
erly in the head of the screw.
When driving in larger and/or longer screws in
hard material, it is advisable to drill a pilot hole
first.
For drilling in metal, use only perfectly sharp-
ened HSS drill bits. The appropriate quality is
guaranteed by the Bosch accessories program.
Soft Grip
The gripping surface 9 (soft grip) reduces the
danger of slipping and thereby improves the grip
on the machine and the handling.
At the same time, the rubber coating achieves a
vibration-reducing effect.
Maintenance and Cleaning
Before any work on the machine itself, remove
the battery.
For safe and proper working, always keep the
machine and its ventilation slots clean.
If the machine should fail despite the care taken
in manufacturing and testing procedures, repair
should be carried out by an authorized after-sales
service agent for Bosch power tools.
In all correspondence and spare parts orders,
please always include the 10-digit article number
given on the nameplate of the machine.
English - 3