Dust/Chip Extraction; Starting Operation; Working Advice - Bosch GPO 12 Professional Originalbetriebsanleitung

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Approved Grinding Tools
All grinding tools mentioned in these operating
instructions can be used.
The permissible speed [min
ential speed [m/s] of the grinding tools used
must at least match the values given in the table.
Therefore, observe the permissible rotational/
circumferential speed on the label of the grind-
ing tool.
max.
[mm]
D b
D
230 –
d
100 30
b
D

Dust/Chip Extraction

Dusts from materials such as lead-containing
coatings, some wood types, minerals and
metal can be harmful to one's health. Touch-
ing or breathing-in the dusts can cause aller-
gic reactions and/or lead to respiratory infec-
tions of the user or bystanders.
Certain dusts, such as oak or beech dust, are
considered as carcinogenic, especially in
connection with wood-treatment additives
(chromate, wood preservative). Materials
containing asbestos may only be worked by
specialists.
– 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.
Bosch Power Tools
-1
] or the circumfer-
[mm]
-1
d [min ] [m/s]
– 3000 80
M 14 3000 45
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.
Switching On and Off
To start the machine, push lock-on button 8 to-
ward the front and then press the On/Off switch
7.
To lock the pressed On/Off switch 7, push the
lock-on button 8 further toward the front.
To switch off the power tool, release the On/Off
switch 7, or when it is locked, briefly press the
On/Off switch 7 and then release it.
Check grinding tools before using. The
grinding tool must be mounted properly
and be able to move freely. Carry out a test
run for at least one minute with no load. Do
not use damaged, out-of-centre or vibrating
grinding tools. Damaged grinding tools can
burst and cause injuries.
Speed preselection (GPO 12 E)
The required speed can be preselected with the
thumbwheel 6 (also while running).
The required speed depends on the material
and the working conditions and can be deter-
mined through practical testing.

Working Advice

Clamp the workpiece if it does not remain
stationary due to its own weight.
Do not strain the machine so heavily that it
comes to a standstill.
After heavily straining the power tool, con-
tinue to run it at no-load for several minutes
to cool down the cutting/grinding tool.
For sanding applications on soft materials, e. g.,
gypsum or paint, it is recommended to use the
rubber sanding plate 17 with sanding disc 18.
Cup brushes 21 and wheel brushes are suitable
for rust removal.
English | 23
1 609 929 T45 | (27.11.09)