Bosch GWS Professional 15-125 CIH Manual Original página 21

OBJ_BUCH-165-009.book Page 22 Tuesday, April 12, 2016 2:31 PM
22 | English
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.
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 save energy, only switch the power tool on when using it.
To start the power tool, press the On/Off switch 4 forward
and then down.
To lock-on the pressed On/Off switch 4, push the On/Off
switch 4 further forward.
To switch off the power tool, release the On/Off switch 4, or
when it is locked, briefly press the On/Off switch 4 and then
release it.
Switch Version without Lock-on (country-specific):
To start the power tool, press the On/Off switch 4 forward
and then down.
To switch off the machine, release the On/Off switch 4.
 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.
Speed preselection (GWS 15-125 CIEH/GWS 15-125 CITH)
The required speed can be preselected with the thumbwheel
3 (also while running).
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 2P4 | (12.4.16)
Do not use damaged, out-of-centre or vibrating grind-
ing tools. Damaged grinding tools can burst and cause in-
juries.
Kickback stop
In case of a sudden drop in speed, e.g.,
caused by a jammed disc while cutting, the
power supply to the motor is electronically
interrupted.
To restart the operation, switch the On/Off
switch 4 to the Off position and start the ma-
chine again.
Restarting Protection
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 4 to the
Off position and start the machine again.
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.
Note: When the machine runs with full speed after switching
on, the reduced starting current, the restarting protection
and the kickback stop features have failed. The power tool
must promptly be sent to an after-sales service agent for
maintenance. For addresses, see Section „After-sales Service
and Application Service".
Constant Electronic Control
Constant electronic control holds the speed constant at no-
load and under load, and ensures uniform working perfor-
mance.
The data in the following table are recommended values.
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
Thumbwheel 3
2 – 3
3
4 – 6
6
6
Bosch Power Tools