Bosch GSB 19-2 RE Professional - Manual (Page 15)

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Bosch Power Tools 1 619 929 J12 | (27.4.11)
Changing the Tool
f Wear protective gloves when changing the tool. The
drill chuck can become very hot during longer work peri-
ods.
Keyless Chuck (GSB 19-2 RE) (see figure B)
The drill spindle is locked when the On/Off switch 6 is not
pressed. This makes quick, convenient and easy changing of
the tool in the drill chuck possible.
Open the keyless chuck 1 by turning in rotation direction n,
until the tool can be inserted. Insert the tool.
Firmly tighten the collar of the keyless chuck 1 by hand in ro-
tation direction o until the locking action (“click”) is no longer
heard. This automatically locks the chuck.
The locking is released again to remove the tool when the col-
lar is turned in the opposite direction.
Keyless Chuck (GSB 780) (see figure C)
Hold the rear sleeve 12 of the keyless chuck 1 tight and turn
the front sleeve 11 in rotation direction n, until the tool can
be inserted. Insert the tool.
Hold the rear sleeve 12 of the keyless chuck 1 tight and firmly
turn the front sleeve 11 in rotation direction o 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 11 is turned in the opposite direction.
Key Type Drill Chuck (see figure D)
Open the key type drill chuck 14 by turning until the tool can
be inserted. Insert the tool.
Insert the chuck key 13 into the corresponding holes of the
key type drill chuck 14 and clamp the tool uniformly.
Screwdriver Tools (see figure E)
When working with screwdriver bits 15, a universal bit holder
16 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 2 to the “Drilling” symbol.
Replacing the Drill Chuck
f Before any work on the machine itself, pull the mains
plug.
Removing the Drill Chuck (see figure F)
Disassemble the auxiliary handle and set the gear selector 7
to the centre position between the 1st and 2nd gear.
Insert a steel pin with a diameter of Ø 4 mm and approx.
50 mm of length into the drill hole on the spindle neck in order
to lock the drill spindle.
Clamp the short end of an Allen key 17 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 Allen key 17 in rotation direction n. Loosen a
tight-seated keyless chuck by giving the long end of the Allen
key 17 a light blow. Remove the Allen key from the keyless
chuck and completely unscrew the keyless chuck.
For machines with key chuck, disassembly is carried out anal-
ogous as described above.
For machines with keyless chuck, an open-end spanner (size
19 mm) can be applied to the drill chuck instead of an Allen
key.
Mounting the Drill Chuck (see figure G)
The keyless chuck/key type drill chuck is mounted in reverse
order.
f
Remove the steel pin from the drill hole on the spindle
neck after mounting is completed.
The drill chuck must be tightened with a tighten-
ing torque of approx. 50–55 Nm.
Dust/Chip Extraction
f 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.
Observe the relevant regulations in your country for the
materials to be worked.
f Prevent dust accumulation at the workplace. Dusts can
easily ignite.
Operation
Starting Operation
f 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 figure H)
f
Actuate the rotational direction switch 3 only when the
machine is at a standstill.
The rotational direction switch 3 is used to reverse the rota-
tional direction of the machine. However, this is not possible
with the On/Off switch 6 actuated.
Right rotation: For drilling and driving in screws, push the ro-
tational direction switch 3 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 3 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 2 to the “Drilling”
symbol.
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