Dust/Chip Extraction; Starting Operation - Bosch GEX 18V-125 Professional Originalbetriebsanleitung

16 | English
Pull off the sanding sheet. Unscrew the 4 screws (11) com-
pletely (using a T20 screwdriver) and remove the sanding
pad (8). Attach the new sanding pad (8) and retighten the
screws.
Note: When attaching the sanding pad, make sure that the
teeth of the catch mate with the recesses in the sanding pad.
Note: Damaged sanding disc holders (12) must only be re-
placed by an after-sales service centre authorised to work
with Bosch power tools.

Dust/Chip Extraction

The dust from materials such as lead paint, certain types of
wood and minerals can be harmful to human health. Touch-
ing or breathing in this dust can trigger allergic reactions
and/or cause respiratory illnesses in the user or in people in
the near vicinity.
Certain dusts, such as oak or beech dust, are classified as
carcinogenic, especially in conjunction with wood treatment
additives (chromate, wood preservative). Materials contain-
ing asbestos may only be machined by specialists.
– Use a dust extraction system that is suitable for the ma-
terial wherever possible.
– Provide good ventilation at the workplace.
– It is advisable to wear a P2 filter class breathing mask.
The regulations on the material being machined that apply in
the country of use must be observed.
Avoid dust accumulation at the workplace. Dust can
u
easily ignite.
Self-generated dust extraction with dust bag (see figures
C–E)
Place and move the complete dust bag (2) onto the extrac-
tion outlet (13) until it lines up precisely with the power tool.
To empty the dust bag(14), pull the complete dust bag (2)
away from the extraction outlet (13). Unscrew the adapter
(15) from the dust bag (14)
Note: Empty the dust bag (14) in good time to ensure op-
timum dust extraction.
When working vertical surfaces, hold the power tool in such
a manner that the dust bag (2) faces downward.
Application Overview
Application/Material
Removing – Removing old paint and varnish
– Sanding wood
– Sanding thermoplastic synthetic materials
Preparing – Sanding wood and veneer prior to painting
– Edge chamfering on wooden materials
– Smoothing wooden surfaces before staining
– Intermediate lacquer sanding and sanding undercoats
– Intermediate lacquer sanding on edges
Finishing – Sanding wood
– Sanding solid wood edges and veneer edges
1 609 92A 5MG | (10.11.2020)
and empty the dust bag.
External dust extraction (see figure F)
Fit a dust extraction hose (16) onto the extraction outlet
(13).
Connect the dust extraction hose (16) to an extractor. You
will find an overview of connecting to various dust extractors
at the end of these operating instructions.
The dust extractor must be suitable for the material being
worked.
When extracting dry dust that is especially detrimental to
health or carcinogenic, use a special dust extractor.
When working on vertical surfaces, hold the power tool with
the dust extraction hose facing downwards.
Operation

Starting Operation

Switching On/Off
Make sure that you are able to press the On/Off switch
u
without releasing the handle.
To switch on the power tool, press the on/off switch (1).
To switch off the power tool, press the on/off switch (1)
again.
Preselecting the orbital stroke rate
You can even preselect the orbital stroke rate during opera-
tion using the necessary orbital stroke rate preselection
thumbwheel (7).
1–2 Low orbital stroke rate
3–4 Medium orbital stroke rate
5–6 High orbital stroke rate
The required orbital stroke rate is dependent on the material
and the work conditions and can be determined using prac-
tical tests.
The Constant Electronic keeps the orbital stroke rate at no
load and under load virtually consistent, guaranteeing uni-
form performance.
After working at a low orbital stoke rate for an extended
period, you should operate the power tool at the maximum
orbital stroke rate for approximately three minutes without
load to cool it down.
Abrasive
P60–P100
P60–P100
P120–P180
P220–P280
P150–P180
Speed setting
4–6
1–3
4–6
1–3
4–6
Bosch Power Tools