Dust/Chip Extraction; Starting Operation; Working Advice - Bosch GOP Professional 250 CE Original Instructions Manual

OBJ_BUCH-1271-004.book Page 17 Tuesday, February 14, 2012 11:38 AM
Sanding disc Material
– Paint
– Varnish
– Filling compound
– Filler

Dust/Chip Extraction

Dusts 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 dusts can cause
allergic reactions and/or lead to respiratory infections of
the user or bystanders.
Certain dusts, such as oak or beech dust, are considered
as carcinogenic, especially in connection with wood-treat-
ment additives (chromate, wood preservative). Materials
containing 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. Dusts can
easily ignite.
Connecting the Dust Extraction (see figure A)
For sanding, always connect the dust extraction.
Remove the application tool/accessory when mounting the
dust extraction 16 (accessory).
If required, assemble the parts of the dust extraction 16 as
shown in the figure. Position the assembled dust extraction
onto the machine via the tool holder 4. 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 14
as shown in the figure.
Pay attention that the felt ring 13 is undamaged and faces
tightly against the sanding plate 10. Replace a damage felt
ring immediately.
Depending on the machine model, place a vacuum hose 17
(accessory) either directly onto the vacuum connection 15 or
cut off the old hose end, screw the extraction adapter 18 (ac-
cessory) onto the hose end and insert it directly into the vac-
uum connection 15. Connect the vacuum hose 17 with a vac-
uum cleaner (accessory). An overview for the connection of
various vacuum cleaners can be found at the end of these in-
structions.
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.
Bosch Power Tools
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
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.

Starting Operation

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.
When not using the power tool, switch it off in order to save
energy.
Preselecting the Orbital Stroke Rate
With the thumbwheel for preselection of the orbital stroke
rate 2, 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.

Working Advice

Before any work on the machine itself, pull the mains
plug.
Wait until the machine has come to a standstill before
placing it down.
Note: Do not cover off the venting slots 3 of the machine while
working, as this reduces the working life of the machine.
Operating Principle
Due to the oscillating drive the application tool/accessory
swings up to 20000 times per minute for 2.8°. This allows for
precise work in narrow spaces.
English | 17
Grain size
coarse
medium
fine
Work with low and uniform application
pressure, otherwise, the working perform-
ance will decline and the application tool
can become blocked.
While working, move the machine back and
forth, so that the application tool does not
heat up excessively and become blocked.
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