Bosch GWS Professional 20-230 JH Manual Original página 20

OBJ_BUCH-1686-003.book Page 21 Wednesday, April 23, 2014 3:36 PM
Approved Grinding Tools
All grinding tools mentioned in these operating instructions
can be used.
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The permissible speed [min ] or the circumferential speed
[m/s] of the grinding tools used must at least match the values
given in the table.
Therefore, observe the permissible rotational/circumferen-
tial speed on the label of the grinding tool.
max.
[mm] [mm]
D b
d
180 8 22.2
D
230 8 22.2
b
D
180
–
230
d
100 30 M 14
b
D
Rotating the Machine Head
 Before any work on the machine itself, pull the mains
plug.
tion protection guard 24 or for left-handed persons.
Completely unscrew the four screws. Rotate the machine
head carefully, without removing it from the housing, to the
new position. Screw in and tighten the four screws again.
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.
Bosch Power Tools
Observe the relevant regulations in your country for the mate-
rials to be worked.
 Prevent dust accumulation at the workplace. Dusts can
Operation
Starting Operation
 Observe correct mains voltage! The voltage of the pow-
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d [min ] [m/s]
When operating the machine with power from mobile genera-
8500 80
tors that do not have sufficient reserve capacity or are not
6600 80
equipped with suitable voltage control with starting current
amplification, loss of performance or untypical behavior can
occur upon switching on.
8500 80
–
Please observe the suitability of the power generator being
6600 80
used, particularly with regard to the mains voltage and fre-
quency.
Switching On and Off
8600 45
To start the power tool, press the On/Off switch 2 forward
and then down.
To lock-on the pressed On/Off switch 2, push the On/Off
switch 2 further forward.
To switch off the power tool, release the On/Off switch 2, or
when it is locked, briefly press the On/Off switch 2 and then
release it.
The machine head can be
rotated with respect to
To save energy, only switch the power tool on when using it.
the machine housing in
Switch Version without Lock-on (country-specific):
90° steps. In this manner,
To start the power tool, press the On/Off switch 2 forward
the On/Off switch can be
and then down.
brought into a more con-
To switch off the machine, release the On/Off switch 2.
venient position for spe-
 Check grinding tools before using. The grinding tool
cial working situations,
e. g., for cutting opera-
tions using the cutting
guide with dust extrac-
Restarting Protection (GWS 20-230 JH)
The restarting protection feature prevents uncontrolled re-
starting of the machine after an interruption in the power sup-
ply.
To restart the operation, switch the On/Off switch 2 to the
Off position and start the machine again.
Reduced starting current (GWS 20-230 JH)
The electronic reduced starting current limits the power con-
sumption when switching the tool on and enables operation
from a 13 ampere fuse.
Note: When the machine runs at full speed immediately after
switching on, the reduced starting current and the restarting
protection have failed. The power tool should be sent imme-
diately to an after-sales service (for addresses, see section
"After-sales Service and Application Service".
– It is recommended to wear a P2 filter-class respirator.
easily ignite.
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.
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.
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1 609 92A 0MJ | (23.4.14)