Bosch Professional GWS 750-100 E Original Instructions Manual page 12

OBJ_BUCH-2262-004.book Page 12 Monday, October 31, 2016 10:09 AM
12 | English
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.
 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.
Speed preselection (GWS 750-100 E)
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
Metal Cutting
Working Advice
 Before any work on the machine itself, pull the mains
plug.
 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.
 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.
1 609 92A 24A | (31.10.16)
Kickback stop (GWS 750-100 I)
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 2 to the Off position and start the
machine again.
Restarting Protection (GWS 750-100 E/GWS 750-100 I)
The restarting protection feature prevents uncontrolled restart-
ing of the machine after an interruption in the power supply.
To restart the operation, switch the On/Off switch 2 to the
Off position and start the machine again.
Reduced starting current (GWS 750-100 E/
GWS 750-100 I)
The electronic reduced starting current limits the power con-
sumption when switching the tool on and enables operation
from a 13 ampere fuse.
Accessory
Sanding disc
Cup brush, sanding disc
Grinding disc
Grinding disc
Cutting disc
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.
Flap Disc
With the flap disc (accessory), curved surfaces and profiles
can be worked.
Flap discs have a considerably higher service life, lower noise
levels and lower sanding temperatures than conventional
sanding sheets.
Cutting Metal
 For cutting with bonded abrasives, always use the pro-
tection guard for cutting 15.
When cutting, work with moderate feed, adapted to the mate-
rial being cut. Do not exert pressure onto the cutting disc, tilt
or oscillate the machine.
Do not reduce the speed of running down cutting discs by ap-
plying sideward pressure.
Thumbwheel Position
2 – 3
3
4 – 6
6
6
Bosch Power Tools