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OBJ_BUCH-1748-003.book Page 15 Monday, November 17, 2014 11:17 AM
Hold the rear sleeve 3 of the keyless chuck 1 tight and firmly
turn the front sleeve 2 in rotation direction by hand until
the locking action is no longer heard. This automatically locks
the drill chuck.
The locking is released again to remove the tool when the
front sleeve 2 is turned in the opposite direction.
Key Type Drill Chuck (see figure C)
Open the key type drill chuck 16 by turning until the tool can
be inserted. Insert the tool.
Insert the chuck key 15 into the corresponding holes of the
key type drill chuck 16 and clamp the tool uniformly.
Screwdriver Tools (see figure D)
When working with screwdriver bits 17, a universal bit holder
18 should always be used. Use only screwdriver bits that fit
the screw head.
For driving screws, always position the "Drilling/Impact Drill-
ing" selector switch 4 to the "Drilling" symbol.
Replacing the Drill Chuck
For power tools without spindle lock, the drill chuck
must be replaced by an authorised after-sales service
agent for Bosch power tools.
Removing the Drill Chuck (see figure E)
Disassemble the auxiliary handle and set the gear selector 9
to the centre position between the 1st and 2nd gear.
Insert a steel pin with a diameter of Ø 5 mm and approx.
60 mm of length into the drill hole on the spindle neck in order
to lock the drill spindle.
Clamp the short end of a hex key 19 into the keyless chuck 1.
Place the machine on a stable surface (e. g. a workbench).
Hold the machine firmly and loosen the keyless chuck 1 by
turning the hex key 19 in rotation direction . Loosen a tight-
seated keyless chuck by giving the long end of the hex key 19
a light blow. Remove the hex key from the keyless chuck and
completely unscrew the keyless chuck.
Mounting the Drill Chuck (see figure F)
The keyless chuck/key type drill chuck is mounted in reverse
order.
Remove the steel pin from the drill hole on the spindle
neck after mounting is completed.
The drill chuck must be tightened with a tightening
torque of approx. 30–35 Nm.
Dust/Chip Extraction
Dusts from materials such as lead-containing coatings,
some wood types, minerals and metal can be harmful to
one's health. Touching or breathing-in the dusts can cause
allergic reactions and/or lead to respiratory infections of
the user or bystanders.
Certain dusts, such as oak or beech dust, are considered
as carcinogenic, especially in connection with wood-treat-
ment additives (chromate, wood preservative). Materials
containing asbestos may only be worked by specialists.
– Provide for good ventilation of the working place.
– It is recommended to wear a P2 filter-class respirator.
Bosch Power Tools
Observe the relevant regulations in your country for the
materials to be worked.
Prevent dust accumulation at the workplace. Dusts can
easily ignite.
Operation
Starting Operation
Observe correct mains voltage! The voltage of the pow-
er source must agree with the voltage specified on the
nameplate of the machine. Power tools marked with
230 V can also be operated with 220 V.
Reversing the rotational direction (see figures G–H)
Actuate the rotational direction switch 5 only when the
machine is at a standstill.
The rotational direction switch 5 is used to reverse the rota-
tional direction of the machine. However, this is not possible
with the On/Off switch 7 actuated.
Right rotation: For drilling and driving in screws, push the ro-
tational direction switch 5 downward on the left side and at
the same time upward on the right side.
Left rotation: For loosening and unscrewing screws and
nuts, push the rotational direction switch 5 upward on the left
side and at the same time downward on the right side.
Setting the operating mode
Drilling and Screwdriving
Set the selector switch 4 to the "Drilling" symbol.
Impact Drilling
Set the selector switch 4 to the "Impact drilling"
symbol.
The selector switch 4 engages noticeably and can also be ac-
tuated with the machine running.
Gear selection, mechanical
Actuate the gear selector 9 only when the machine is at
a standstill.
Two speed ranges can be preselected with the gear selector 9.
Gear I:
Low speed range; for working with large drilling diameter or
for driving in screws.
Gear II:
High speed range; for working with small drilling diameter.
If the gear selector 9 cannot be turned to the stop, turn the
drill chuck a little.
Switching On and Off
To start the machine, press the On/Off switch 7 and keep it
pressed.
To lock the pressed On/Off switch 7, press the lock-on button 6.
To switch off the machine, release the On/Off switch 7 or
when it is locked with the lock-on button 6, briefly press the
On/Off switch 7 and then release it.
To save energy, only switch the power tool on when using it.
English | 15
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