Working Advice - Bosch GWS Professional 18-125 L Manual Original

OBJ_BUCH-3330-001.book Page 25 Tuesday, November 7, 2017 2:23 PM
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.
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.
Speed preselection (GWS 18-125 SL/GWS 18-125 SPL)
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
Metal Cutting
The values specified for speed levels are guide values.
 The rated speed of the accessory must be at least equal
to the maximum speed marked on the power tool. Ac-
cessories running faster than their rated speed can break
and fly apart.
Speed prese- GWS 18-125 ...
lection level
-1
[min ]
1 2800
2 4500
3 6300
4 8200
5 9800
6
12000
Bosch Power Tools
To restart the operation, switch the On/Off switch 4 to the
Off position and start the machine 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.
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)
Cutting disc

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
GWS 18-150 ...
-1 standstill.
[min ]
 After heavily straining the power tool, continue to run
2800
it at no-load for several minutes to cool down the acces-
4100
sory.
5400
 Do not touch grinding and cutting discs before they
6700
have cooled down. The discs can become very hot while
8000
working.
 Do not use the power tool with a cut-off stand.
10000
English | 25
Thumbwheel 3
2 – 3
3
4 – 6
6
6
6
1 609 92A 3ZX | (7.11.17)