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Bosch GSB 24-2 Seite 21

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The required speed/impact rate depends on the material
and the working conditions; it can be ascertained through
practical tests.
Constant Electronic Control (GSB 21-2 RCT)
The constant electronic control keeps the preselected speed
and impact rate nearly constant between no-load and load
conditions.
Electronic Torque Control/Speed Preselection (GSB
21-2RCT)
To drill with speed preselection, set the se-
lector switch(4) to the "drilling" symbol. The
required speed can be selected with the
thumbwheel(3); it can also be adjusted during
operation.
To drive in screws with torque control, set
the selector switch(4) to the "screwdriving"
symbol. The effective torque at the drill spindle
can be variably adjusted with the thumbwheel
(3) even during operation:
I = low torque, III = high torque.
The maximum speed is automatically adapted to the adjus-
ted torque.
If the preselected torque is reached during screwdriving, the
machine switches off; the application tool no longer rotates.
If the load on the machine is then removed with the on/off
switch(7) still pressed, the application tool continues to run
only at very low speed for safety reasons.
After briefly releasing the on/off switch(7), the next screw
can be driven in with the same torque.
For screwdriving without torque limitation,
turn the thumbwheel(3) all the way to the
right. This setting is required when the torque
in position III is not sufficient.
Practical Advice
uPull the plug out of the socket before carrying out any
work on the power tool.
uOnly apply the power tool to the screw/nut when the
tool is switched off. Rotating tool inserts can slip off.
After working at a low speed for an extended period, you
should operate the power tool at the maximum speed for ap-
proximately three minutes without load to cool it down.
To drill into tiles, set the selector switch (2) to the "drilling"
symbol. After drilling through the tile, set the selector switch
to the "impact drilling" symbol and drill with impact.
Use carbide drill bits when working with concrete, stone and
masonry.
When drilling into metal, only use sharpened HSS drills (HSS
= high-speed steel) which are in perfect condition. The
Bosch accessory range guarantees appropriate quality.
Using the drill bit sharpener (accessory), you can effortlessly
sharpen twist drill bits with a diameter of 2.5–10 mm.
Maintenance and Service
Maintenance and Cleaning
uRemove the battery from the power tool before carry-
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.
uPull the plug out of the socket before carrying out any
work on the power tool.
uTo ensure safe and efficient operation, always keep
the power tool and the ventilation slots clean.
If the battery is no longer working, please contact an author-
ised after-sales service agent for Bosch power tools.
In order to avoid safety hazards, if the power supply cord
needs to be replaced, this must be done by Bosch or by an
after-sales service centre that is authorised to repair Bosch
power tools.
After-Sales Service and Application Service
Our after-sales service responds to your questions concern-
ing maintenance and repair of your product as well as spare
parts. You can find explosion drawings and information on
spare parts at: www.bosch-pt.com
The Bosch product use advice team will be happy to help you
with any questions about our products and their accessor-
ies.
In all correspondence and spare parts orders, please always
include the 10‑digit article number given on the nameplate
of the product.
India
Bosch Service Center
69, Habibullah Road, (Next to PSBB School), T. Nagar
Chennai– 600077
Phone: (044) 64561816
Bosch Service Center
18, Community Center
Phase 1, Mayapuri
New Delhi– 110064
Phone: (011) 43166190
Bosch Service Center
Shop no 7&8, Aspen garden
Walbhat road , Goregaon (E)
Near to Ram Mandir Railway Station
Mumbai– 400063
Mobile: 09819952950
Malaysia
Robert Bosch Sdn. Bhd.(220975-V) PT/SMY
No. 8A, Jalan 13/6
46200 Petaling Jaya
Selangor
Tel.: (03) 79663194
Toll-Free: 1800 880188
Fax: (03) 79583838
E-Mail: kiathoe.chong@my.bosch.com
www.bosch-pt.com.my
Bosch Power Tools 1 609 92A 7YU | (01.06.2022)
… 21 …

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