Auxiliary Handle; Dust/Chip Extraction; Starting Operation - Bosch GSB Professional 21-2 Notice Originale

OBJ_BUCH-909-004.book Page 16 Wednesday, January 13, 2016 11:44 AM
16 | English
Assembly
 Before any work on the machine itself, pull the mains
plug.

Auxiliary Handle

 Operate your machine only with the auxiliary handle
11.
Only for GSB 21-2 power tools with key type drill chuck:
Mount the auxiliary handle 11 in accordance with figures A to
C.
The auxiliary handle 11 can be set in 12 positions to achieve
a safe and low-fatigue working stance.
Turn the bottom part of the auxiliary handle 11 in rotation di-
rection  and push the auxiliary handle 11 forward until you
can pivot it to the desired position. Then pull the auxiliary han-
dle 11 back again and tighten it by turning the bottom part of
the auxiliary handle in rotation direction  (see figure D).
Adjusting the Drilling Depth (see figure D)
The required drilling depth X can be set with the depth stop
12.
Press the button for the depth stop adjustment 10 and insert
the depth stop into the auxiliary handle 11.
Pull out the depth stop until the distance between the tip of
the drill bit and the tip of the depth stop corresponds with the
desired drilling depth X.
The knurled surface of the depth stop 12 must face upward.
Changing the Tool
 Wear protective gloves when changing the tool. The
drill chuck can become very hot during longer work peri-
ods.
Keyless Chuck (see figure E)
The drill spindle is locked when the On/Off switch 7 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 ,
until the tool can be inserted. Insert the tool.
Firmly tighten the collar of the keyless chuck 1 by hand in ro-
tation direction  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.
Key Type Drill Chuck (see figure F)
Open the key type drill chuck 15 by turning until the tool can
be inserted. Insert the tool.
Insert the chuck key 14 into the corresponding holes of the
key type drill chuck 15 and clamp the tool uniformly.
Screwdriver Tools (see figure G)
When working with screwdriver bits 16, a universal bit holder
17 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.
2 609 932 948 | (13.1.16)
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 H)
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 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 Hex key 18 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 18 in rotation direction . Loosen a tight-
seated keyless chuck by giving the long end of the Hex key 18
a light blow. Remove the Hex key from the keyless chuck and
completely unscrew the keyless chuck.
Mounting the Drill Chuck (see figure I)
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. 67–74 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.
Observe the relevant regulations in your country for the mate-
rials 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 J – K)
 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.
Bosch Power Tools