Bosch GBH 4-32 DFR Professional Originalbetriebsanleitung Seite 14

14 | English
Rotary hammer
Impact energy per stroke ac-
cording to EPTA-Proced-
ure 05:2016
Tool holder
Chisel positions
Max. drilling diameter
– Concrete (with twist drill
bit)
– Masonry (with hollow core
bit)
– Steel
– Wood
Weight according to EPTA-
Procedure 01:2014
Protection class
The specifications apply to a rated voltage [U] of 230 V. These spe-
cifications may vary at different voltages and in country-specific mod-
els.
Noise/Vibration Information
Noise emission values determined according
to EN IEC 62841-2-6.
Typically, the A-weighted noise level of the power tool is:
Sound pressure level 90 dB(A); sound power
level 101 dB(A). Uncertainty K = 3 dB.
Wear hearing protection!
Vibration total values a (triax vector sum) and uncertainty K
h
determined according to EN IEC 62841-2-6:
Hammer drilling into concrete: a
h
2
Chiselling: a =11.4 m/s , K=1.5 m/s
h
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.
1 609 92A 70G | (29.03.2022)
GBH 4-32 DFR
J 4.2
SDS plus
12
mm 32
mm 90
mm 13
mm 32
kg 4.7
/ II
2 2
=12.7 m/s , K=1.5 m/s ,
2
,
Assembly
Pull the plug out of the socket before carrying out any
u
work on the power tool.
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
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
For hammer drilling and chiselling, you will need SDS plus
tools, which insert 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). A keyless chuck is
required for such drilling tools.
Changing the drill chuck
Removing/inserting the quick-change chuck
Removing the Quick-Change Chuck (see figure A)
– Pull back on the quick-change chuck locking ring (6), hold
it in this position and pull the SDS plus quick-change
chuck (2) or the keyless quick-change chuck (1) out from
the front.
– Once the quick-change chuck is removed, protect it from
dirt.
Inserting the quick-change chuck (see figure A)
Use only model-specific original equipment and pay
u
attention to the number of identification grooves.
Only quick-change chucks with two identification
grooves are permitted. If an unsuitable quick-change
chuck is used, the application tool can fall out during op-
eration.
– Before insertion, clean the quick-change chuck and lightly
grease the shank.
– Wrap your whole hand around the SDS-plus quick-change
chuck (2) or the keyless quick-change chuck (1). Use a
turning motion to push the quick-change chuck into the
drill chuck holder until you hear it click into place.
– The quick-change chuck is automatically locked. Check
that it is locked by pulling on the quick-change chuck.
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