Dust/Chip Extraction; Starting Operation - Bosch GOP 12V-28 Professional Manual Original

OBJ_BUCH-2853-001.book Page 20 Monday, January 16, 2017 1:56 PM
20 | English
Sanding disc Material
– Paint
– Varnish
– Filling compound
– Filler

Dust/Chip Extraction

 Dust from materials such as lead-containing coatings,
some wood types, minerals and metal can be harmful to
one's health. Touching or breathing-in the dust can cause
allergic reactions and/or lead to respiratory infections of
the user or bystanders.
Certain dust, such as oak or beech dust, is considered car-
cinogenic, especially in connection with wood-treatment
additives (chromate, wood preservative). Materials con-
taining asbestos may only be worked by specialists.
– As far as possible, use a dust extraction system suitable
for the material.
– Provide for good ventilation of the working place.
– It is recommended to wear a P2 filter-class respirator.
Observe the relevant regulations in your country for the
materials to be worked.
 Prevent dust accumulation at the workplace. Dust can
easily ignite.
Connecting the Dust Extraction (see figure A)
The dust extraction 14 is intended only when working with the
sanding plate 15; it is not of use in combination with other
application tools.
For sanding, always connect the dust extraction.
Remove the application tool/accessory when mounting the
dust extraction 14 (accessory).
If required, assemble the parts of the dust extraction 14 as
shown in the figure. Position the assembled dust extraction
onto the machine via the tool holder 7. Turn the dust extrac-
tion in such a manner that the cams of the dust extraction en-
gage into the corresponding recesses on the housing. Fasten
the dust extraction to the machine with the retaining clip 17
as shown in the figure.
Pay attention that the felt ring 16 is undamaged and faces
tightly against the sanding plate 15. Replace a damage felt
ring immediately.
Depending on machine version, place a vacuum hose 20
(accessory) either directly onto the vacuum connection 18 or
cut off the old hose end, screw the extraction adapter 19
(accessory) onto the hose end and then place it directly onto
the vacuum connection 18. Connect the vacuum hose 20 with
a vacuum cleaner (accessory). An overview for the connec-
tion of various vacuum cleaners can be found on the fold-out
page.
1 609 92A 2LW | (16.1.17)
Application
For sanding off paint
For sanding primer (e. g., for removing brush dashes,
drops of paint and paint run)
For final sanding of primers before coating
The vacuum cleaner must be suitable for the material being
worked.
When vacuuming dry dust that is especially detrimental to
health or carcinogenic, use a special vacuum cleaner.
Operation

Starting Operation

Inserting the battery
 Use only original Bosch lithium-ion batteries with the
voltage listed on the nameplate of your power tool.
Using other batteries can lead to injuries and pose a fire
hazard.
Note: Use of batteries not suitable for the machine can lead to
malfunctions of or cause damage to the power tool.
Insert the charged battery 3 into the handle until it can be felt
to engage and faces flush against the handle.
Switching On and Off
To start the machine, push the On/Off switch 1 forward so
that the "I" is indicated on the switch.
To switch off the machine, push the On/Off switch 1 toward
the rear so that the "0" is indicated on the switch.
To save energy, only switch the power tool on when using it.
The lithium-ion battery is protected against deep discharging
by the "Electronic Cell Protection (ECP)". When the battery is
empty, the machine is switched off by means of a protective
circuit: The inserted tool no longer rotates.
Note: If the machine should automatically switch off because
of a discharged or overheated battery, make sure to set the
machine's On/Off switch 1 to off. Charge the battery and al-
low it to cool down before restarting the machine. Otherwise
the battery can become damaged.
Preselecting the Orbital Stroke Rate
With the thumbwheel for preselection of the orbital stroke
rate 5, you can preselect the required orbital stroke rate, even
during operation.
The required stroke rate depends on the material and the
working conditions and can be determined through practical
testing.
Grain size
coarse 40
60
medium 80
100
120
fine 180
240
320
400
Bosch Power Tools