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16 | English
Grinder
Recommended chargers
A) Measured at 20–25 °C with rechargeable battery GBA 12V
3.0Ah and depending on the battery's state of charge as well as
the power tool's operating temperature
B) Depends on battery in use
C) Limited performance at temperatures < 0 °C
Noise/Vibration Information
Noise emission values determined according
to EN 60745-2-23.
Typically, the A-weighted sound pressure level of the power
tool is less than 70 dB(A). The noise level when working can
exceed the volume stated. Wear hearing protection!
Total vibration values a
(triax vector sum) and uncertainty K
h
determined according to EN 60745-2-23:
Surface grinding (roughing with grinding tool diameter of
25 mm):
2
2
a
< 2.5 m/s
, K = 1,5 m/s
h
Surface grinding (roughing with grinding tool diameter of
50 mm):
2
2
a
= 13.2 m/s
, K = 1,5 m/s
h
The vibration level given in these instructions has been
measured in accordance with a standardised measuring pro-
cedure and may be used to compare power tools. It can also
be used for a preliminary estimation of exposure to vibra-
tion.
The stated vibration level applies to the main applications of
the power tool. However, if the power tool is used for differ-
ent applications, with different application tools or poorly
maintained, the vibration level may differ. This can signific-
antly increase the exposure to vibration over the total work-
ing period.
To estimate the exposure to vibration accurately, the times
when the tool is switched off or when it is running but not ac-
tually being used should also be taken into account. This can
significantly reduce the exposure to vibration over the total
working period.
Implement additional safety measures to protect the oper-
ator from the effects of vibration, such as servicing the
power tool and application tools, keeping the hands warm,
and organising workflows correctly.
Rechargeable battery
Bosch sells some cordless power tools without a re-
chargeable battery. You can tell whether a rechargeable bat-
tery is included with the power tool by looking at the pack-
aging.
Charging the battery
Use only the chargers listed in the technical data. Only
u
these chargers are matched to the lithium-ion battery of
your power tool.
Note: Lithium-ion rechargeable batteries are supplied par-
tially charged according to international transport regula-
1 609 92A 8HB | (21.12.2022)
tions. To ensure full rechargeable battery capacity, fully
GWG 12V-50 S
charge the rechargeable battery before using your tool for
GAL 12...
the first time.
GAX 18...
Inserting the Battery
Push the charged battery into the battery holder until it
clicks into place.
Removing the Battery
To remove the rechargeable battery, press the battery re-
lease buttons and pull the battery out. Do not use force to
do this.
Battery charge indicator
The 5 LEDs of the LED display will indicate the state of
charge of the battery. The LED indicator lights up for
5 seconds after start-up.
LED
5 × continuous green light
4 × continuous green light
3 × continuous green light
2 × continuous green light
1 × continuous yellow light
1 × continuous red light
Temperature-dependent overload protection
In normal conditions of use, the power tool cannot be over-
loaded. If the power tool is overloaded or not kept within the
permitted battery temperature range, the speed is reduced
or the power tool switches off. At reduced speed, the power
tool will run again at full speed once the permitted battery
temperature is reached or the load is reduced. If it automat-
ically shuts down, switch the power tool off, allow the bat-
tery to cool down, then switch the power tool back on.
Recommendations for Optimal Handling of the
Battery
Protect the battery against moisture and water.
Only store the battery within a temperature range of −20 to
50 °C. Do not leave the battery in your car in the summer, for
example.
A significantly reduced operating time after charging indic-
ates that the battery has deteriorated and must be replaced.
Follow the instructions on correct disposal.
Fitting
Remove the battery from the power tool before carry-
u
ing out work on the power tool (e.g. maintenance,
changing tool, etc.). The battery should also be re-
moved for transport and storage. There is risk of injury
from unintentionally pressing the on/off switch.
Fitting the abrasive tools (see figure A)
Only use open-ended spanners that are suitable and
u
undamaged (see "Technical Data").
Capacity
80–100 %
60–80 %
40–60 %
20–40 %
1–20 %
0–1 %
Bosch Power Tools
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