Bosch GBH Professional 3-28 DRE Notice Originale page 16

16 | English
Rotary hammer
Weight according to EPTA-Procedure
01:2014
Protection class
A) not suitable with hollow core bit
The specifications apply to a rated voltage [U] of 230 V. These specifications may vary at different voltages and in country-specific models.
Noise/Vibration Information
Noise emission values determined according to EN 62841-2-6.
Typically, the A-weighted noise level of the power tool is:
Sound pressure level
Sound power level
Uncertainty K
Wear hearing protection!
Vibration total values a (triax vector sum) and uncertainty K determined according to EN 62841-2-6:
h
Hammer drilling into concrete:
a
h
K
Chiselling:
a
h
K
The vibration level and noise emission value given in these
instructions have been measured in accordance with a
standardised measuring procedure and may be used to com-
pare power tools. They may also be used for a preliminary
estimation of vibration and noise emissions.
The stated vibration level and noise emission value repres-
ent the main applications of the power tool. However, if the
power tool is used for other applications, with different ap-
plication tools or is poorly maintained, the vibration level
and noise emission value may differ. This may significantly
increase the vibration and noise emissions over the total
working period.
To estimate vibration and noise emissions accurately, the
times when the tool is switched off or when it is running but
not actually being used should also be taken into account.
This may significantly reduce vibration and noise emissions
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 their hands warm,
and organising workflows correctly.
Assembly
Pull the plug out of the socket before carrying out any
u
work on the power tool.
1 609 92A 6GJ | (16.12.2021)
GBH 3-28 DRE
kg
GBH 3-28 DRE
dB(A)
dB(A)
dB
2
m/s
2
m/s
2
m/s
2
m/s
Auxiliary handle
Do not operate your power tool without the auxiliary
u
handle (12).
Make sure that the auxiliary handle is always
u
tightened. Otherwise you could lose control of the power
tool when working.
Swivelling the auxiliary handle (see figure A)
You can swivel the auxiliary handle (12) to any angle for a
safe work posture that minimises fatigue.
– Turn the lower gripping end of the auxiliary handle (12)
anticlockwise and swivel the auxiliary handle (12) into
the required position. Then turn the lower gripping end of
the auxiliary handle (12) clockwise to retighten it.
Make sure that the retaining strap of the auxiliary handle
slots into the corresponding groove of the housing.
Selecting drill chucks and tools
Hammer drilling and chiselling require SDS-plus application
tools that are inserted into the SDS-plus drill chuck.
For drilling without impact in wood, metal, ceramic and
plastic as well as for screwdriving, tools without SDS‑plus
are used (e.g. cylindrical shank drill bits). For these tools, a
keyless chuck or a keyed chuck are required.
The SDS plus quick-change chuck (2) can easily be swapped
with the keyless quick-change chuck (1) supplied.
GBH 3-28 DFR
GBH 3000
3.5
/ II
GBH 3-28 DFR
91
102
3
14.5
1.5
9.7
1.5
Bosch Power Tools
3.6
/ II
91
102
3
11.8
1.5
10.0
1.5