Starting Operation; Working Advice; Maintenance And Service; Maintenance And Cleaning - Bosch GBM Professional 350 Original Instructions Manual

OBJ_BUCH-527-004.book Page 8 Monday, May 10, 2010 1:11 PM
8 | English
– Provide for good ventilation of the work-
ing place.
– It is recommended to wear a P2 filter-
class respirator.
Observe the relevant regulations in your
country for the materials to be worked.
Operation

Starting Operation

Observe correct mains voltage! The voltage
of the power source must agree with the
voltage specified on the nameplate of the
machine. Power tools marked with 230 V
can also be operated with 220 V.
Reversing the Rotational Direction
(GBM 350 RE)
Actuate the rotational direction switch 4
only when the machine is at a standstill.
The rotational direction switch 4 is used to re-
verse the rotational direction of the machine.
However, this is not possible with the On/Off
switch 3 actuated.
Right Rotation: For drilling and driving in
screws, push the rotational direction switch 4
left to the stop.
Left Rotation: For loosening and unscrewing
screws and nuts, press the rotational direction
switch 4 through to the right stop.
Switching On and Off
To start the machine, press the On/Off switch 3
and keep it pressed.
To lock the pressed On/Off switch 3, press the
lock-on button 2.
To switch off the machine, release the On/Off
switch 3.
Adjusting the Speed (GBM 350 RE)
The speed of the switched on power tool can be
variably adjusted, depending on how far the
On/Off switch 3 is pressed.
1 619 P08 930 | (10.5.10)
Light pressure on the On/Off switch 3 results in
a low rotational speed. Further pressure on the
switch results in an increase in speed.

Working Advice

Apply the power tool to the screw/nut only
when it is switched off. Rotating tool inserts
can slip off.
Tips
After longer periods of working at low speed, al-
low 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 sharp-
ened HSS drill bits (HSS=high-speed steel). The
appropriate quality is guaranteed by the Bosch
accessories program.
Before screwing larger, longer screws into hard
materials, it is advisable to predrill a pilot hole
with the core diameter of the thread to approx.
2
/ of the screw length.
3

Maintenance and Service

Maintenance and Cleaning

Before any work on the machine itself, pull
the mains plug.
For safe and proper working, always keep
the machine and ventilation slots clean.
If the replacement of the supply cord is neces-
sary, this has to be done by Bosch or an author-
ized Bosch service agent in order to avoid a safe-
ty hazard.
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 Bosch power tools.
In all correspondence and spare parts order,
please always include the 10-digit article
number given on the type plate of the machine.
Bosch Power Tools