Bosch GBR 15 CA - Инструкция по эксплуатации - Страница 20

20

 | English 

1 609 92A 1FH | (27.8.15)

Bosch Power Tools

– Only use vacuum hoses as intended for by Bosch. Do not 

manipulate the vacuum hose. When rocks or chunks of 
stone/masonry are drawn into the vacuum hose, cease 
work and clean the vacuum hose immediately. Prevent the 
vacuum hose from being bent or creased.

– Use the concrete grinder only as intended for.
– Observe the general requirements for construction sites.
– Provide for good ventilation.
– Ensure that the work area is clear. When working for ex-

tended periods of time, the vacuum cleaner must be able 
to move along freely or at the right time.

– Wear hearing protection, protective goggles, dust mask 

and gloves as required. As dust mask, use at least a parti-
cle-filtering class FFP 2 half-mask.

– Use a suitable vacuum cleaner for cleaning the workplace. 

Prevent settled dust from being swirled up by sweeping.

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.

Switching On and Off

To 

start

 the power tool, 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

 or, 

if it is locked, briefly push down the back of the On/Off switch 

1

 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.

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

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 

1

 to the 

Off position and start the machine again.

Note: 

Check the function of the restarting protection feature 

regularly by having the mains plug pulled during operation 
and plugged in again afterwards.

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.

Constant Electronic Control

Constant electronic control holds the speed constant at no-
load and under load, and ensures uniform working perfor-
mance.

Overload Protection

When overloaded, the motor comes to a stop. Relieve the load 
on the machine immediately and allow to cool down for ap-
prox. 30 seconds at the highest no-load speed.

Sanding close to the edge (GBR 15 CAG) (see figure B)

For grinding close to the edge, slide the locking device 

7

 for-

wards (



) and swing the movable part of the guard 

6

 side-

ways (



). Lock the locking device 

7

  ( ).

Working Advice



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.



Do not touch diamond cup wheels before they have 
cooled. 

Diamond cup wheels become very hot while work-

ing.

Apply the power tool to the workpiece only when switched on.

Move the machine with a circular motion or alternately in 
length and crosswise direction over the workpiece/surface 
applying moderate pressure. For removal of coatings, the ma-
chine can also be guided at a small angle to the workpiece sur-
face without a reduction of the dust extraction capacity.

Maintenance and Service

Maintenance and Cleaning



Before any work on the machine itself, pull the mains 
plug.



For safe and proper working, always keep the machine 
and ventilation slots clean.



In extreme conditions, always use dust extraction as 
far as possible. Blow out ventilation slots frequently 
and install a portable residual current device (PRCD). 

When working metals, conductive dust can settle in the in-
terior of the power tool. The total insulation of the power 
tool can be impaired.

A blunt diamond cup wheel 

15

 can be reground by briefly 

grinding abrasive material (e. g. lime-sand brick).

Please store and handle the accessory(-ies) carefully.

If the replacement of the supply cord is necessary, this has to 
be done by Bosch or an authorized Bosch service agent in or-
der to avoid a safety hazard.

Changing the Brush Collar

To ensure optimal dust extraction, change a worn brush collar 
in good time.

GBR 15 CA:

 Using a screwdriver, carefully pry out the brush 

collar 

11

 at the openings of the brush guide with the diamond 

cup wheel 

15

 mounted. Use the diamond cup wheel for lever-

age while prying out.

Carefully push a new brush collar 

11

 to the stop into the brush 

guide. When inserting the new brush collar, pay attention that 
the ends of the brush collar are not positioned in one of the 
openings of the brush guide.

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