Bosch GWS Professional 20-230 H Manual Original página 19

Angle grinder
– with additional low-vibration auxiliary handle
– with standard auxiliary handle
Protection class
The specifications apply to a rated voltage [U] of 230 V. These specifications may vary at different voltages and in country-specific models.
When switching on power tools with starting current limitation, the voltage drops briefly. Interference with other equipment may occur in the
event of unfavourable conditions in the electricity supply. Malfunctions are not expected if the impedances in the electricity supply are below
0.25 ohms.
Noise/vibration information
Noise emission values determined according to
EN 60745-2-3.
Typically the A-weighted noise level of the power tool is:
Sound pressure level 92 dB(A); Sound power level 103
dB(A). Uncertainty K=3 dB.
Wear hearing protection
Total vibration values a (triax vector sum) and uncertainty K
h
determined according to EN 60745-2-3:
Surface grinding (roughing):
2 2
a =7.5 m/s , K=1.5 m/s ,
h
Grinding with abrasive disc:
2 2
a =4.0 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.
Fitting
Fitting protective equipment
Pull the plug out of the socket before carrying out any
u
work on the power tool.
Note: If the grinding disc breaks during operation or the
holding fixtures on the protective guard/power tool become
damaged, the power tool must be sent to the after-sales ser-
vice immediately; see the "After-sales service and advice on
using products" section for addresses.
Bosch Power Tools
GWS 20-230 H
kg
kg
Protective guard for grinding
Place the protective guard (5) on the spindle collar. Adjust
the position of the protective guard (5) to the requirements
of the operation and lock the protective guard (5) with the
locking screw (6).
Adjust the protective guard (5) such that sparking in
u
the direction of the operator is prevented.
Protective guard for cutting
Always use the protective guard for cutting (13) when
u
cutting bonded abrasives.
Provide sufficient dust extraction when cutting stone.
u
The protective guard for cutting (13) is fitted in the same
way as the protective guard for grinding (5).
Extraction guard for cutting with a guide block
The extraction guard for cutting with a guide block (21) is fit-
ted in the same way as the protective guard for grinding (5).
Side handle
Do not operate your power tool without the side
u
handle (3).
Screw the side handle (3) on the left or right of the machine
head depending on how your are working.
Hand guard
Always fit the hand guard (15) when working with the
u
rubber sanding pad (17) or with the cup brush/disc
brush/flap disc.
Attach the hand guard (15) to the side handle (3).
Fitting the abrasive tools
Pull the plug out of the socket before carrying out any
u
work on the power tool.
Do not touch grinding and cutting discs until they have
u
cooled down. The discs can become very hot while work-
ing. Clean the grinding spindle (4) and all the parts to be fitted.
Lock the grinding spindle with the spindle lock button (1)
before clamping and releasing the abrasive tools.
Do not press the spindle lock button while the grind-
u
ing spindle is moving. The power tool may become dam-
aged if you do this.
Grinding/cutting disc
Pay attention to the dimensions of the abrasive tools. The
diameter of the hole must match that of the hub flange. Do
not use an adapter or reducer.
English | 19
GWS 20-230 JH
5.2 5.2
5.1 5.1
/ II / II
1 609 92A 432 | (26.11.2018)