Bosch PEX 400 AE Manual Original página 15

Dust/chip extraction
The dust from materials such as lead paint, some types of
wood, minerals and metal can be harmful to human health.
Touching or breathing in this dust can trigger allergic reac-
tions 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
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easily ignite.
Self-generated Dust Extraction with Dust Box (see
figures E–H)
Place the dust box (3) onto the extraction outlet (11) until it
clicks into place.
You can easily check the filling level of the dust box (3)
through the transparent container.
To empty the dust box (3), rotate and pull it downwards.
Before opening the dust box (3), knock the dust box against
a firm surface as shown in the figure to loosen the dust from
the filter element.
Holding the dust box (3) firmly, flap the filter element (12)
upwards out of the way and empty the dust box. Use a soft
brush to clean the flaps of the filter element (12).
Note: In order to ensure optimum dust extraction, empty the
dust box (3) in good time and clean the filter element (12)
regularly.
When working on vertical surfaces, hold the power tool with
the dust box (3) facing downwards.
External dust extraction (see figure I)
Fit a dust extraction hose (13) onto the extraction outlet
(11).
Connect the dust extraction hose (13) 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.
Auxiliary Handle (see figure J)
The auxiliary handle (5) enables comfortable handling and
optimum power distribution, with a high sanding removal
rate in particular.
Bosch Power Tools
You can remove the auxiliary handle in order to sand close to
edges. Unscrew and remove the wing nut (14) and pull the
screw (15) out of the housing. Then pull the auxiliary handle
(5) off towards you.
To reinstall the auxiliary handle (5), push it onto the housing
from the front such that the ridges on the auxiliary handle
engage in the recesses on the housing. Firmly fix the auxili-
ary handle in place using the screw (15) and the wing nut
(14).
Operation
Starting Operation
Pay attention to the mains voltage. The voltage of the
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power source must match the voltage specified on the
rating plate of the power tool.
Products that are only sold in AUS and NZ: Use a resid-
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ual current device (RCD) with a nominal residual current
of 30 mA or less.
Switching On/Off
Make sure that you are able to press the On/Off switch
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without releasing the handle.
To switch on the power tool, slide the on/off switch (2) for-
ward so that "1" appears on the switch.
To switch off the power tool, slide the on/off switch (2)
backward so that "0" appears on the switch.
Preselecting the orbital stroke rate
You can even preselect the orbital stroke rate during opera-
tion using the necessary orbital stroke rate preselection
thumbwheel (1).
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.
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.
Working Advice
Pull the plug out of the socket before carrying out any
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work on the power tool.
Always wait until the power tool has come to a com-
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plete stop before placing it down.
This power tool is not suitable for bench-mounted use.
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It must not be clamped into a vice or fastened to a work-
bench, for example.
Sanding Surfaces
Switch the power tool on, place the entire sanding surface
against the surface of the workpiece and apply moderate
pressure as you move the sander over the workpiece.
English | 15
1 609 92A 5F5 | (11.09.2019)