Bosch GSB 20-2 - Инструкция по эксплуатации - Страница 14

14

 | English

1 609 92A 4L0 | (16.08.2018)

Bosch Power Tools

Changing the tool

u

Wear protective gloves when changing tools.

 The drill

chuck may heat up significantly when it is used for long
periods.

Keyless chuck (see figure B)

The drill spindle is locked when the on/off switch 

(6)

 is not

pressed. This makes it possible to change the application
tool in the drill chuck quickly, conveniently and easily.
Open the keyless chuck 

(1)

 by turning it in the direction of

rotation 

➊

 until the tool can be inserted. Insert the tool.

Firmly tighten the sleeve of the keyless chuck 

(1)

 by turning

it by hand in the rotational direction 

➋

 until it stops clicking.

This will automatically lock the drill chuck.
The lock will disengage again if you turn the sleeve in the op-
posite direction to remove the tool.

Keyed chuck (see figure C)

Open the keyed chuck 

(12)

 by turning it until the tool can be

inserted. Insert the tool.
Insert the chuck key into the corresponding holes of the
keyed chuck 

(12)

 and clamp the tool evenly.

Screwdriving tools (see figure D)

You should always use a universal bit holder 

(14)

 when using

screwdriver bits 

(13)

. Only use screwdriver bits that fit the

screw head.
For screwdriving, make sure the "drilling/impact drilling" se-
lector switch 

(2)

 is always set to the "drilling" symbol.

Changing the drill chuck

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Pull the plug out of the socket before carrying out any
work on the power tool.

Removing the drill chuck (see figure E)

Remove the auxiliary handle and set the gear selector switch

(7)

 to the middle position between first and second gear.

Insert a steel pin with a diameter of 4 mm and a length of ap-
prox. 50 mm into the hole on the spindle collar to lock the
drill spindle in place. Clamp a hex key 

(15)

 in the keyless

chuck 

(1)

, leading with the short shaft.

Place the power tool on a firm surface, e.g. a work bench.
Hold the power tool in place and loosen the keyless chuck

(1)

 by turning the hex key 

(15)

 in the rotational direction 

➊

.

A tightly seated keyless chuck is loosened with a light blow
on the long shaft of the hex key 

(15)

. Remove the hex key

from the keyless chuck and completely unscrew the keyless
chuck from the power tool.

Fitting the drill chuck (see figure F)

To fit the keyless chuck/keyed chuck, perform the same
steps in reverse order.

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After successfully fitting the drill chuck, remove the
steel pin from the hole again.

The drill chuck must be tightened using a tight-
ening torque of approx. 50–55 Nm.

Dust/Chip Extraction

Dust 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 dust can cause allergic
reactions and/or lead to respiratory infections of the user or
bystanders.
Certain dust, such as oak or beech dust, is considered carci-
nogenic, especially in connection with wood-treatment ad-
ditives (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 ma-
terials to be worked.

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Avoid dust accumulation at the workplace. 

Dust can

easily ignite.

Operation

Starting Operation

u

Pay attention to the mains voltage. The voltage of the
power source must match the voltage specified on the
rating plate of the power tool. Power tools marked
with 230 V can also be operated with 220 V.

u

Products that are only sold in AUS and NZ:

 Use a resid-

ual current device (RCD) with a nominal residual current
of 30 mA or less.

Setting the rotational direction (see figure G)

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Only operate the rotational direction switch (3) when
the power tool is not in use.

The rotational direction switch 

(3)

 is used to change the ro-

tational direction of the power tool. However, this is not pos-
sible while the on/off switch 

(6)

 is being pressed.

Clockwise rotation:

 To drill and drive in screws, slide the

rotational direction switch 

(3)

 downwards on the left-hand

side and upwards on the right-hand side at the same time.

Anti-clockwise rotation:

 To loosen and unscrew screws and

nuts, slide the rotational direction switch 

(3)

 upwards on the

left-hand side and downwards on the right-hand side at the
same time.

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.
The selector switch 

(2)

 clicks into place and

can also be actuated when the motor is running.

Mechanical Gear Selection

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You can press the gear selector switch

(7)

with the

power tool running at a low speed. You should not do