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OBJ_BUCH-708-005.book Page 12 Monday, November 21, 2016 10:43 AM
12 | English
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.
Operation
Starting 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.
Hold power tool by insulated gripping surfaces 24 and
auxiliary handle 4 only. The accessory may contact hid-
den wiring or its own cord. Accessory contacting a "live"
wire may make exposed metal parts of the power tool "live"
and shock the operator.
Speed preselection (GWS 8-100 CE/GWS 8-125 CE/GWS 850 CE)
The required speed can be preselected with the thumbwheel 3 (also while running).
The data in the following table are recommended values.
Material
Application
Metal
Removing paint
Wood, metal
Brushing, rust removal
Metal, masonry
Grinding
Metal
Rough grinding
Masonry, stone
Cutting
Working Advice
Exercise caution when cutting slots in structural walls;
see Section "Information on Structures".
Clamp the workpiece if it does not remain stationary
due to its own weight.
Do not strain the machine so heavily that it comes to a
standstill.
After heavily straining the power tool, continue to run
it at no-load for several minutes to cool down the acces-
sory.
1 609 92A 2V8 | (21.11.16)
When operating the machine with power from mobile genera-
tors that do not have sufficient reserve capacity or are not
equipped with suitable voltage control with starting current
amplification, loss of performance or untypical behavior can
occur upon switching on.
Please observe the suitability of the power generator being
used, particularly with regard to the mains voltage and fre-
quency.
Switching On and Off
To start the power tool, push the On/Off switch 2 forwards.
To lock the On/Off switch 2, press the On/Off switch 2 down
at the front until it latches.
To switch off the power tool, release the On/Off switch 2 or,
if it is locked, briefly push down the back of the On/Off switch
2 and then release it.
To save energy, only switch the power tool on when using it.
Check grinding tools before using. The grinding tool
must be mounted properly and be able to move freely.
Carry out a test run for at least one minute with no load.
Do not use damaged, out-of-centre or vibrating grind-
ing tools. Damaged grinding tools can burst and cause in-
juries.
Reduced starting current
The electronic reduced starting current limits the power con-
sumption when switching the tool on and enables operation
from a 13 ampere fuse.
Constant Electronic Control
Constant electronic control holds the speed constant at no-
load and under load, and ensures uniform working perfor-
mance.
Accessory
Sanding disc
Cup brush, sanding disc
Grinding disc
Grinding disc
Cutting disc and cutting guide
(Cutting masonry/stone is permitted only with use of
the cutting guide)
Do not touch grinding and cutting discs before they
have cooled down. The discs can become very hot while
working.
Do not use the power tool with a cut-off stand.
Rough Grinding
Never use a cutting disc for roughing.
The best roughing results are achieved when setting the ma-
chine at an angle of 30° to 40°. Move the machine back and
forth with moderate pressure. In this manner, the workpiece
will not become too hot, does not discolour and no grooves
are formed.
Thumbwheel Position
2 – 3
3
4 – 6
6
6
Bosch Power Tools
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