Bosch GBH Professional GBH 240 Notice Originale page 15

Rotary hammer
– Concrete
– Masonry (with hollow core bit)
– Steel
– Wood
Weight according to EPTA-Proced-
ure 01:2014
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.
Noise/Vibration Information
Noise emission values determined according
to EN 60745-2-6.
Typically, the A-weighted noise level of the power tool is:
Sound pressure level 93 dB(A); sound power
level 104 dB(A). Uncertainty K = 3 dB.
Wear hearing protection!
Vibration total values a (triax vector sum) and uncertainty K
h
determined according to EN 60745-2-6:
Hammer drilling into concrete: a
h
2
Chiselling: a =14.0 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.
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 (14).
Swivelling the auxiliary handle (see figure A)
You can swivel the auxiliary handle (14) to any angle for a
safe work posture that minimises fatigue.
Bosch Power Tools
mm
mm
mm
mm
kg
2 2
=13.0 m/s , K=1.5 m/s ,
2
,
GBH 240
24
68
13
30
2.8
/ II
– Turn the lower gripping end of the auxiliary handle (14)
anticlockwise and swivel the auxiliary handle (14) into
the required position. Then turn the lower gripping end of
the auxiliary handle (14) 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.
Changing the drill chuck
Inserting/removing the keyed chuck
GBH 240
You must use a suitable drill chuck (keyed or keyless chuck,
accessories) to work with tools that do not have SDS-plus
(e.g. cylindrical shank drill bits).
Fitting the keyed chuck (see figure B)
– Screw the SDS-plus shank (18) into a keyed chuck (17).
Secure the keyed chuck (17) using the securing screw
(16). Note that the securing screw has a left-hand
thread.
Inserting the keyed chuck (see figure B)
– Clean and lightly grease the insertion end of the shank.
– Insert the keyed chuck with the adapter shank into the
tool holder with a turning motion until it automatically
locks.
– Check that it is locked by pulling the keyed chuck.
Removing the keyed chuck
– Push the locking sleeve (5) back and remove the keyed
chuck (17).
Removing/inserting the quick-change chuck
GBH 240 F
Removing the Quick-Change Chuck (see figure C)
– 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.
English | 15
GBH 240 F
24
68
13
30
2.9
/ II
1 609 92A 3SE | (10.03.2021)