Bosch GWS 24-300 J - Инструкция по эксплуатации - Страница 18

18

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1 609 92A 0J8 | (4.7.14)

Bosch Power Tools

Dust/Chip Extraction



Dusts from materials such as lead-containing coatings, 
some wood types, minerals and metal can be harmful to 
one’s health. Touching or breathing-in the dusts can cause 
allergic reactions and/or lead to respiratory infections of 
the user or bystanders.
Certain dusts, such as oak or beech dust, are considered 
as carcinogenic, especially in connection with wood-treat-
ment additives (chromate, wood preservative). Materials 
containing asbestos may only be worked by specialists.
– As far as possible, use a dust extraction system suitable 

for the material.

– Provide for good ventilation of the working place.
– It is recommended to wear a P2 filter-class respirator.

Observe the relevant regulations in your country for the mate-
rials to be worked.



Prevent dust accumulation at the workplace. 

Dusts can 

easily ignite.

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 

start

 the power tool, press the On/Off switch 

16

 forward 

and then down.

To 

switch off

 the machine, release the On/Off switch 

16

.

To save energy, only switch the power tool on when using 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.

Reduced starting current (GWS 24-300 J)

The electronic reduced starting current limits the power con-
sumption when switching the tool on and enables operation 
from a 13 ampere fuse.

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.



Do not touch grinding and cutting discs before they 
have cooled down. 

The discs can become very hot while 

working.

Protect the cutting disc against impact, shock and grease. Do 
not subject the cutting disc to lateral pressure.

Cutting Metal



For cutting with diamond-tipped abrasives, always use 
the protection guard for cutting 6.

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.

The machine must al-
ways work in an up-
grinding motion. Other-
wise, the danger exists 
of it being pushed 

un-

controlled

 out of the 

cut.

When cutting profiles 
and square bar, it is best 
to start at the smallest 
cross section.

Cutting Stone (see figure A)



Provide for sufficient dust extraction when cutting 
stone.



The machine may be used only for dry cutting/grinding.

For cutting stone, it is best to use a diamond cutting disc.

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 cutting guide on 
the workpiece. Slide the 
machine with moderate 
feed, adapted to the ma-
terial to be worked.

For cutting especially 
hard material, e. g., con-
crete with high pebble 
content, the diamond 
cutting disc can over-

heat and become damaged as a result. This is clearly indicat-
ed by circular sparking, rotating with the diamond cutting 
disc.

OBJ_BUCH-280-005.book  Page 18  Friday, July 4, 2014  10:30 AM