Working Advice - Bosch HWS serie Originalbetriebsanleitung

OBJ_BUCH-2487-001.book Page 34 Monday, June 22, 2015 9:30 AM
34 | English
Switching the Frequency Converter On/Off
The frequency converter must be put into operation first be-
fore actuating the power tool.
For this, observe the operating instructions of the frequency
converter.
Switching the Power Tool On/Off
with the On/Off Switch (see figure J1)
Applies for the following types:
– 0 602 324 4..
– To start the machine, push the On/Off switch 1 forwards.
– To lock the On/Off switch 1, press the On/Off switch 1
down at the front until it latches.
– To switch off the power tool, release the On/Off switch 1.
When the On/Off switch 1 is locked-on, briefly press it to-
ward the rear and then release it.
Switching the Power Tool On/Off
with Safety Switch (see figure J2)
Applies for the following types:
– 0 602 301 4.. – 0 602 329 5..
– 0 602 304 40. – 0 602 331 5..
– 0 602 305 40. – 0 602 332 5..
– 0 602 306 434 – 0 602 334 5..
– To start the power tool, press the On/Off switch 1 forward
and then down.
– To lock-on the pressed On/Off switch 1, push the On/Off
switch 1 further forward.
– To switch off the power tool, release the On/Off switch 1,
or when it is locked, briefly press the On/Off switch 1 and
then release it.

Working Advice

 Disconnect the power supply before making any ad-
justments, changing accessories, or placing the ma-
chine aside. This safety measure prevents accidental
starting of the power tool.
 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.
Sanding with the 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 (see figure K)
 For cutting with bonded abrasives, always use a pro-
tection guard for cutting.
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.
1 609 92A 155 | (22.6.15)
Do not reduce the speed of running down cutting discs by ap-
plying sideward pressure.
The machine must always work in an up-grinding motion. Oth-
erwise, 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 section.
Cutting Stone
 Provide for sufficient dust extraction when cutting
stone.
 Wear a dust respirator.
 The machine may be used only for dry cutting/grinding.
For cutting stone, it is best to use a diamond cutting disc. For
safety against jamming, a special cutting guide with dust ex-
traction protection guard (accessory) must be used.
Operate the machine only with dust extraction and additional-
ly wear a dust protection mask.
The vacuum cleaner must be approved for the extraction of
masonry dust. Bosch provides suitable vacuum cleaners.
– Switch on the machine and place the front part of the cut-
ting guide on the workpiece. Slide the machine with mod-
erate feed, adapted to the material to be worked.
For cutting especially 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 cir-
cular sparking, rotating with the diamond cutting disc.
In this case, interrupt the cutting process and allow the dia-
mond cutting disc to cool by running the machine for a short
time at maximum speed with no load.
Noticeably decreasing work progress and circular sparking
are indications of a diamond cutting disc that has become
dull. Briefly cutting into abrasive material (e. g. lime-sand
brick) can resharpen the disc again.
Information on Structures
Slots in structural walls are subject to the Standard DIN 1053
Part 1, or country-specific regulations.
These regulations are to be observed under all circumstanc-
es. Before beginning work, consult the responsible structural
engineer, architect or the construction supervisor.
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.
Sanding with Sanding Discs and the Rubber Sanding Plate
The choice of the suitable sanding paper depends on the ma-
terial to be worked.
Bosch offers various sanding-paper qualities that fit the rub-
ber sanding plate. Contact your specialist shop for advice.
Bosch Power Tools