Bosch GOP Professional 30-28 Original Instructions Manual page 13

OBJ_BUCH-2788-001.book Page 13 Thursday, January 14, 2016 3:19 PM
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 8 is intended only when working with the
sanding plate 9; it is not of use in combination with other
application tools.
For sanding, always connect the dust extraction.
To mount the dust extraction 8 (accessory), remove the appli-
cation tool and the depth stop 15.
Slide the dust extraction 8 all the way over the tool holder 4
onto the collar of the power tool. Turn it to the required posi-
tion. Press shut the clamping lever 16 to fix the dust extrac-
tion.
Plug the tool sleeve 18 of the vacuum hose 19 onto the vacu-
um connection 17. Connect the vacuum hose 19 to a vacuum
cleaner (accessory). You will find an overview of connecting
to various vacuum cleaners on the fold-out page.
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
 Observe correct mains voltage! The voltage of the pow-
er 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.
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
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.
GOP 40-30: The worklight improves visibility in the immedi-
ate work area. It is automatically switched on and off with the
power tool.
 Do not look directly into the work area illumination –
your sight can be temporarily degraded!
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
The oscillating drive causes the application tool/accessory to
oscillate back and forth up to 20000 times per minute. This
enables precise work in the tightest of spaces.
English | 13
Grain size
coarse
medium
fine
Work with low and uniform application
pressure, otherwise, the working perfor-
mance 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.
1 609 92A 2HX | (14.1.16)
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