Manual Bosch GSR 18V-21 (page 16 of 204) (English, German, Dutch, Danish, French, Italian, Polish, Portuguese, Swedish, Turkish, Spanish, Norwegian, Finnish)

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16 | English

1 609 92A 3YE | (29.8.17) Bosch Power Tools

Set the rotational direction switch 10 to the centre position in

order to avoid unintentional starting. Insert the charged bat-

tery 7 into the handle so that it can be felt to engage and faces

flush against the handle.

Reversing the rotational direction (see figure B)

The rotational direction switch 10 is used to reverse the rota-

tional direction of the machine. However, this is not possible

with the On/Off switch 11 actuated.

Right Rotation: For drilling and driving in screws, push the

rotational direction switch 10 left to the stop.

Left Rotation: For loosening or unscrewing screws, push the

rotational direction switch 10 right to the stop.

Setting the operating mode

Drilling

GSR 18V-21:

Set the torque selector setting ring 3 to the re-

quired torque.

GSB 18V-21:

Set the operating mode selector switch 4 to the

“drilling” symbol.

Screwdriving

GSR 18V-21:

Set the torque selector setting ring 3 to the

“screwdriving” symbol.

GSB 18V-21:

Set the operating mode selector switch 4 to the

“screwdriving” symbol.

Impact drilling(GSB 18V-21)

Set the operating mode selector switch 4 to the

“impact drilling” symbol.

Switching On and Off

To start the machine, press the On/Off switch 11 and keep it

pressed.

The LED 9 lights up when the On/Off switch 11 is halfway or

fully pressed, and enables illumination of the screwing loca-

tion in unfavourable light conditions.

To save energy, only switch the power tool on when using it.

Adjusting the Speed

The speed of the switched-on power tool can be variably ad-

justed, depending on how far the On/Off switch 11 is

pressed.

Light pressure on the On/Off switch 11 results in a low rota-

tional speed. Further pressure on the switch results in an in-

crease in speed.

Setting the torque

With the torque preselection ring 3, the required torque can

be preselected in 20 steps. The inserted tool is stopped as

soon as the set torque is reached.

Gear selection, mechanical

 The gear selector 5 can be actuated at standstill or

when the machine is running. However, this should not

be done while operating at full load or maximum speed.

1st gear:

Low speed range; for working with large drilling diameters.

2nd gear:

High speed range; for drilling with small drilling diameter.

Temperature Dependent Overload Protection

In normal conditions of use, the power tool cannot be over-

loaded. If the power tool is overloaded or the battery temper-

ature is not kept within the permitted range, the power tool

switches off and the LED on the power tool flashes. Allow the

power tool to cool down before you carry on working.

Protection Against Deep Discharging

The lithium-ion battery is protected against deep discharging

by the “Electronic Cell Protection (ECP)”. When the battery is

empty, the machine is switched off by means of a protective

circuit: The inserted tool no longer rotates.

Working Advice

 Always push the gear selector and turn the operating

mode selector switch through to the stop. Otherwise,

the machine can become damaged.

 Apply the power tool to the screw only when it is

switched off. Rotating tool inserts can slip off.

An auxiliary tool can be used to remove the screwdriver bit or

universal bit holder.

 Working in especially dusty environments can lead to

failure of the power tool. If the power tool suddenly

fails, remove the carbon brushes and check them (see

section “”).

Maintenance and Service

Maintenance and Cleaning

 Before any work on the machine itself (e. g. mainte-

nance, tool change, etc.) as well as during transport

and storage, remove the battery from the power tool.

There is danger of injury when unintentionally actuating

the On/Off switch.

 For safe and proper working, always keep the machine

and ventilation slots clean.

Replacing the Carbon Brushes (see figure C)

Check the length of the carbon brushes approx. every

2–3 months and replace the carbon brushes if required.

Never replace only a single carbon brush!

Note: Use only carbon brushes supplied by Bosch and intend-

ed specifically for your product.

– Unscrew the caps 6 using a suitable screwdriver.

– Replace the spring-loaded carbon brushes 14 and screw

the caps back on again.

When the battery is no longer operative, please refer to an au-

thorised after-sales service agent for Bosch power tools.

OBJ_BUCH-3248-001.book Page 16 Tuesday, August 29, 2017 7:47 AM

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Bosch GSR 18V-21 Manual

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