Bosch GWS 8-115 Operating Instructions Manual page 27

OBJ_BUCH-340-001.book Page 28 Thursday, February 8, 2007 8:55 AM
Speed preselection (GWS 11-125 CIE/GWS 14-125 CIE/GWS 14-125 CIT)
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, metall Brushing, rust removal
Metal, masonry Sanding
Metal Rough grinding
Masonry, stone Cutting
Operating Instructions
Exercise caution when cutting slots in struc-
tural walls; see Section "
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.
Grinding and cutting discs become very hot
while working; do not touch until they have
cooled.
Rough Grinding
Never use a cutting disc for roughing.
The best roughing results are achieved when setting
the machine 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 metal, always work with the pro-
tection guard for cutting 13.
When cutting, work with moderate feed, adapted to
the material 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 applying sideward pressure.
28 | English
Tool
Sanding disc
Cup brush, sanding disc
Sanding disc
Sanding disc
Cutting disc and cutting guide
(Cutting masonry/stone is permitted
only with use of the cutting guide)
Information on
Cutting Stone
For cutting stone, always work with the cut-
ting guide with dust extraction protection
guard 20.
The machine may be used only for dry cut-
ting/grinding.
For cutting stone, it is best to use a diamond cutting disc.
As a safety measure against jamming, the cutting guide
with dust extraction protection guard 20 must be used.
Operate the machine only with dust extraction and
additionally wear a dust protection mask.
The vacuum cleaner must be approved for the extrac-
tion of masonry dust. Bosch provides suitable vacuum
cleaners.
For cutting expecially hard material, e. g., concrete
with high pebble content, the diamond cutting disc
can overheat and become damaged as a result. This
is clearly indicated by circular sparking, rotating with
the diamond cutting disc.
Thumbwheel 3
2 – 3
3
4 – 6
6
6
The machine must
always work in an up-
grinding motion. Other-
wise, the danger exists
of it being pushed
uncontrolled out of
the cut.
When cutting profiles
and square bar, it is
best to start at the
smallest cross sec-
tion.
Switch on the machine
and place the front
part of the cutting
guide on the work-
piece. Slide the
machine with moder-
ate feed, adapted to
the material to be
worked.
1 609 929 L00 • 8.2.07