Changing The Tool; Dust/Chip Extraction; Starting Operation - Bosch GSB Professional 21-2 Notice Originale

OBJ_DOKU-26857-001.fm Page 16 Thursday, May 26, 2011 3:57 PM
16 | English
Pull out the depth stop until the distance between the tip of
the drill bit and the tip of the depth stop correspond 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 periods.
Keyless Chuck (see figure B)
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 C)
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 D)
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.
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 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 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 Allen key 18 in rotation direction
tight-seated keyless chuck by giving the long end of the Allen
key 18 a light blow. Remove the Allen 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. 40–45 Nm.
2 609 932 659 | (26.5.11)

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
,
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 2 to the "Drilling" symbol.
Impact Drilling
Set the selector switch 2 to the "Impact drilling"
symbol.
. Loosen a
The selector switch 2 engages noticeably and can also be ac-
tuated with the machine running.
Gear Selection, Mechanical
The gear selector 9 can be actuated on machines run-
ning at low speed. However, this should not be done
when the machine is stopped, at full load or running at
maximum speed.
Two speed ranges can be preselected with the gear selector 9.
Bosch Power Tools