GSB 202 RET Professional - Drill BOSCH - Free user manual and instructions

USER MANUAL GSB 202 RET Professional BOSCH

ϪΤϔλ OBJ_BUCH-129-002.book Page 2 Tuesday, October 23, 2007 2:57 PM3 |

OBJ_BUCH-129-002.book Page 3 Tuesday, October 23, 2007 2:57 PM4 | 1 609 929 M40 | (23.10.07) Bosch Power Tools B

A GSB 20-2 RET Professional

13 OBJ_BUCH-129-002.book Page 4 Tuesday, October 23, 2007 2:57 PM5 | 1 609 929 M40 | (23.10.07) Bosch Power Tools

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General Power Tool Safety

Read all safety warnings and all

instructions. Failure to follow

the warnings and instructions may result in elec-

tric shock, fire and/or serious injury.

Save all warnings and instructions for future

The term “power tool” in the warnings refers to

your mains-operated (corded) power tool or bat-

tery-operated (cordless) power tool.

a) Keep work area clean and well lit. Clut-

tered or dark areas invite accidents.

b) Do not operate power tools in explosive

atmospheres, such as in the presence of

flammable liquids, gases, or dust. Power

tools create sparks which may ignite the

c) Keep children and bystanders away while

operating a power tool. Distractions can

cause you to lose control.

2) Electrical safety

a) Power tool plugs must match the outlet.

Never modify the plug in any way. Do not

use any adapter plugs with earthed

(grounded) power tools. Unmodified

plugs and matching outlets will reduce the

risk of electric shock.

b) Avoid body contact with earthed or

grounded surfaces, such as pipes, radia-

tors, ranges and refrigerators. There is an

increased risk of electric shock if your

body is earthed or grounded.

c) Do not expose power tools to rain or wet

conditions. Water entering a power tool

will increase the risk of electric shock.

d) Do not abuse the cord. Never use the cord

for carrying, pulling or unplugging the

power tool. Keep cord away from heat,

oil, sharp edges or moving parts. Dam-

aged or entangled cords increase the risk

e) When operating a power tool outdoors,

use an extension cord suitable for out-

door use. Use of a cord suitable for out-

door use reduces the risk of electric shock.

f) If operating a power tool in a damp loca-

tion is unavoidable, use a ground fault cir-

cuit interrupter (GFCI) or an earth leak-

age circuit breaker (ELCB). Use of a GFCI

or an ELCB reduces the risk of electric

a) Stay alert, watch what you are doing and

use common sense when operating a

power tool. Do not use a power tool while

you are tired or under the influence of

drugs, alcohol, or medication. A moment

of inattention while operating power tools

may result in serious personal injury.

b) Use personal protective equipment. Al-

ways wear eye protection. Protective

equipment such as dusk mask, non-skid

safety shoes, hard hat or hearing protec-

tion used for appropriate conditions will

reduce personal injuries.

c) Prevent unintentional starting. Ensure

the switch is in the off position before

connecting to power source and/or bat-

tery pack, picking up or carrying the tool.

Carrying power tools with your finger on

the switch or energizing power tools that

have the switch on invites accidents.

d) Remove any adjusting key or wrench be-

fore turning the power tool on. A wrench

or a key that is left attached to a rotating

part of the power tool may result in per-

e) Do not overreach. Keep proper footing

and balance at all times. This enables bet-

ter control of the power tool in unexpected

f) Dress properly. Do not wear loose cloth-

ing or jewelry. Keep your hair, clothing,

and gloves away from moving parts.

Loose clothes, jewelry, or long hair can be

caught in moving parts.

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g) If devices are provided for the connection

of dust extraction and collection facili-

ties, ensure these are connected and

properly used. Use of dust collection can

reduce dust-related hazards.

4) Power tool use and care

a) Do not force the power tool. Use the cor-

rect power tool for your application. The

correct power tool will do the job better

and safer at the rate for which it is de-

b) Do not use the power tool if the switch

does not turn it on or off. Any power tool

that cannot be controlled with the switch

is dangerous and must be repaired.

c) Disconnect the plug from the power

source and/or the battery pack from the

power tool before making any adjust-

ments, changing accessories, or storing

power tools. Such preventive safety mea-

sures reduce the risk of starting the power

d) Store idle power tools out of the reach of

children and do not allow persons unfa-

miliar with the power tool or these in-

structions to operate the power tool.

Power tools are dangerous in the hands of

e) Maintain power tools. Check for misalign-

ment or binding of moving parts, break-

age of parts and any other condition that

may affect the power tool’s operation. If

damaged, have the power tool repaired

before use. Many accidents are caused by

poorly maintained power tools.

f) Keep cutting tools sharp and clean. Prop-

erly maintained cutting tools with sharp

cutting edges are less likely to bind and are

g) Use the power tool, accessories, tool bits

etc. in accordance with these instruc-

tions, taking into account the working

conditions and the work to be performed.

Use of the power tool for operations differ-

ent from those intended could result in a

hazardous situation.

a) Have your power tool serviced by a quali-

fied repair person using only identical re-

placement parts. This will ensure that the

safety of the power tool is maintained.

Power Tool-specific Safety

f Wear hearing protection when using impact

drills. The influence of noise can lead to loss

f Use the auxiliary handle supplied with the

power tool. Loss of control over the power

tool can cause personal injury.

f Use suitable detectors to determine if utility

lines are hidden in the work area or call the

local utility company for assistance. Contact

with electric lines can lead to fire and electric

shock. Damaging a gas line can lead to explo-

sion. Penetrating a water line causes property

f Switch off the power tool immediately when

the tool insert jams. Be prepared for high re-

action torque that can cause kickback. The

tool insert jams when:

– the power tool is subject to overload or

– it becomes wedged in the workpiece.

f Hold the power tool only by the insulated

gripping surfaces when performing an oper-

ation where the cutting tool may contact hid-

den wiring or its own power cord. Contact

with a “live” wire will also make exposed met-

al parts of the power tool “live” and shock the

f When working with the power tool, always

hold it firmly with both hands and provide

for a secure stance. The power tool is guided

more secure with both hands.

f Secure the workpiece. A workpiece clamped

with clamping devices or in a vice is held more

secure than by hand.

f Do not work materials containing asbestos.

Asbestos is considered carcinogenic.

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f Take protective measures when dust can de-

velop during working that is harmful to one’s

health, combustible or explosive. Example:

Some dusts are regarded as carcinogenic.

Wear a dust mask and work with dust/chip ex-

traction when connectable.

f Keep your workplace clean. Blends of mate-

rials are particularly dangerous. Dust from

light alloys can burn or explode.

f Always wait until the power tool has come to

a complete stop before placing it down. The

tool insert can jam and lead to loss of control

over the power tool.

f Do not use the power tool with a damaged

cord. Do not touch the damaged cord and

pull the plug from the outlet when the cord

is damaged while working. Damaged cords

increase the risk of an electric shock.

Functional Description

Read all safety warnings and all in-

structions. Failure to follow the

warnings and instructions may result

in electric shock, fire and/or serious

While reading the operating instructions, unfold

the graphics page for the tool and leave it open.

The machine is intended for impact drilling in

brick, concrete and stone as well as for drilling in

wood, metal and plastic. Machines with electron-

ic control and right/left rotation are also suitable

for driving screws in/out and thread-cutting.

The numbering of the product features refers to

the illustration of the power tool on the graphics

3 Speed dial for electronic speed preselection

(GSB 20-2 RCE/GSB 20-2 RET)

4 “Drilling/screwdriving” selector switch

8 Dial control for speed preselection

9 Lock-on button for On/Off switch

10 Gear selection lever

11 Button for depth stop adjustment

12 Auxiliary handle*

15 Key-type drill chuck

17 Universal bit holder*

*The accessories illustrated or described are not in-

cluded as standard delivery.

**Commercially available (not included in the delivery

OBJ_BUCH-129-002.book Page 8 Tuesday, October 23, 2007 2:57 PMEnglish | 9

Impact frequency at no-load

bpm 48000 48000 48000 48000 48000

Rated torque (1st/2nd gear)

Nm 4.4/1.7 5.2/2.0 5.2/2.0 3.9/1.5 3.9/1.5

Electronic torque control

Constant electronic control

Key-type drill chuck

Keyless drill chuck – – z zz

Maximum drilling diameter

mm 1.5–13 1.5–13 1.5–13 1.5–13 1.5–13

/II /II /II /II /II The values given are valid for nominal voltages [U] of 230/240 V. For lower voltages and models for specific countries,

these values can vary.

Please observe the article number on the type plate of your power tool. The trade names of individual tools may vary.

OBJ_BUCH-129-002.book Page 9 Tuesday, October 23, 2007 2:57 PM1 609 929 M40 | (23.10.07) Bosch Power Tools 10 | English

Auxiliary Handle (see figure A)

f Operate your power tool only with the auxil-

The auxiliary handle 12 can be set to any position

for a secure and low-fatigue working positure.

Turn the bottom part of the auxiliary handle 12 in

counterclockwise direction and swivel the auxil-

iary handle 12 to the desired position. Then re-

tighten the bottom part of the auxiliary handle 12

by turning in clockwise direction.

Adjusting the Drilling Depth (see figure A)

The required drilling depth X can be set with the

Press the button for the depth stop adjustment

11 and insert the depth stop into the auxiliary

Pull out the depth stop until the distance be-

tween the tip of the drill bit and the tip of the

depth stop correspond with the desired drilling

The knurled surface of the depth stop 13 must

f Before any work on the power tool itself,

pull the mains plug.

Keyless Chuck (see figure B)

The drill spindle is locked when the On/Off

switch 7 is not pressed. This makes quick, conve-

nient and easy changing of the tool in the drill

Open the keyless chuck 1 by turning in rotation

direction n until the tool can be inserted. Insert

Firmly tighten the collar of the keyless chuck 1 by

hand in rotation direction o until the locking ac-

tion (“click”) is no longer heard. This automati-

cally locks the chuck.

The locking is released again to remove the tool

when the collar is turned in the opposite direc-

Key-type Drill Chuck (see figure C)

f Wear protective gloves when changing the

tool. The drill chuck can become very hot dur-

ing longer work periods.

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

Screwdriver Tools (see figure D)

When working with screwdriver bits 16, a univer-

sal bit holder 17 should always be used. Use only

screwdriver bits that fit the screw head.

For driving screws, always position the “Drill-

ing/Impact Drilling” selector switch 2 to the

f Before any work on the power tool itself,

pull the mains plug.

f For power tools without spindle lock, the

drill chuck must be replaced by an autho-

rized after-sales service agent for Bosch

Removing the Drill Chuck (see figure E)

Disassemble the auxiliary handle and set the gear

selector 10 to the center position between the

Insert a steel pin with a diameter of

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 a hex key 18 into the key-

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 n. Loosen a tight-seated key-

less chuck by giving the long end of the hex key

18 a light blow. Remove the hex key from the key-

less chuck and completely unscrew the keyless

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Mounting the Drill Chuck (see figure F)

The keyless chuck is mounted in reverse order.

f Remove the steel pin from the drill hole on

the spindle neck after mounting is complet-

The drill chuck must be tightened with a

tightening torque of approx. 35–40 Nm.

of the power source must agree with the

voltage specified on the type plate of the

Reversing the Rotational Direction

(see figures G–H) (GSB 20-2 RE/

GSB 20-2 RCE/GSB 20-2 RET)

f Actuate the rotational direction switch 5

only when the power tool is at a standstill.

The rotational direction switch 5 is used to re-

verse the rotational direction of the machine.

However, this is not possible with the On/Off

Right rotation: For drilling and driving in screws,

push the rotational direction switch 5 downward

on the left side and at the same time upward on

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 “Drill-

Set the selector switch 2 to the “Ham-

mer drilling” symbol.

The selector switch 2 engages noticeably and can

also be actuated with the machine running.

Gear Selection, Mechanical

f The gear selector 10 can be actuated at

standstill or when the machine is running.

However, this should not be done while op-

erating at full load or maximum speed.

Two speed ranges can be preselected with the

gear selection lever 10.

Low speed range; for working with

large drilling diameter or for driving

High speed range; for working with

small drilling diameter.

If the gear selection lever 10 cannot be fully en-

gaged, lightly rotate the drill bit by twisting the

Switching On and Off

To start the power tool, press the On/Off switch

7 and keep it pressed.

To lock the pressed On/Off switch 7, press the

To switch off the power tool, release the On/Off

switch 7 or when it is locked with the lock-on but-

ton 9, briefly press the On/Off switch 7 and then

the machine is equipped with a safe-

ty clutch (anti-rotation).

f If the tool insert becomes caught or jammed,

the drive to the drill spindle is interrupted.

Because of the forces that occur, always

hold the power tool firmly with both hands

and provide for a secure stance.

If the power tool jams, switch the machine

off and loosen the tool insert. When switch-

ing the power tool on with the drilling tool

jammed, high reaction torques can occur.

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Adjusting the Speed/Impact Frequency

(GSB 20-2 RE/GSB 20-2 RCE/GSB 20-2 RET)

The speed/impact rate of the switched on power

tool can be variably adjusted, depending on how

far the On/Off switch 7 is pressed.

Light pressure on the On/Off switch 7 results in

low speed/impact rate. Further pressure on the

switch increases the speed/impact rate.

Preselecting the Speed/Impact Frequency

With the dial control for speed preselection 8,

the required speed/impact frequency can be pre-

selected even during operation.

The required speed/impact frequency depends

on the material and the working conditions, and

can be determined through practical testing.

Electronic Speed Preselection

(GSB 20-2 RCE/GSB 20-2 RET)

With the speed dial for electronic speed prese-

lection 3, the required speed/impact frequency

can be selected even if the machine is running.

The required speed/impact frequency depends

on the material and the working conditions, and

can be determined through practical testing.

Constant Electronic Control

(GSB 20-2 RCE/GSB 20-2 RET)

The constant electronic control keeps the prese-

lected speed and impact rate nearly constant be-

tween no-load and load conditions.

Electronic Torque Limitation/Speed Preselec-

tion (Torque Control) (GSB 20-2 RET)

Drilling with speed preselection: Set

the selector switch 4 to the “Drilling”

symbol. The required speed can be

selected with the speed dial 3; it can

also be adjusted during operation.

Screwdriving with torque limitation:

Set the selector switch 4 to the

“Screwdriving” symbol. The effective

torque at the drill spindle can be vari-

able adjusted with the dial control 3

I=low torque, III=high torque.

The maximum speed is automatically adapted to

the adjusted torque.

If the preselected torque is reached during

screwdriving, the machine switches off; the drill-

ing tool no longer rotates. If the load on the ma-

chine is then removed with the On/Off switch 7

still pressed, the drilling tool continues to run

only at very low speed for safety reasons.

After briefly releasing the On/Off switch 7, the

next screw can be driven in with the same

For screwdriving without torque lim-

itation, turn the speed dial 3 to the

right stop. This setting is required,

when the torque in position III is not

Working Instructions

f Apply the power tool to the screw/nut only

when it is switched off. Rotating tool inserts

After longer periods of working at low speed, al-

low the machine to cool down by running it for ap-

prox. 3 minutes at maximum speed with no load.

For drilling in tiles, set the selector switch 2 to

the “Drilling” symbol. Do not switch over to the

symbol “Impact Drilling” or work with impact un-

til after drilling through the tile.

Use carbide tipped drill bits when working in

concrete, masonry and brick wall.

For drilling in metal, use only perfectly sharp-

ened HSS drill bits (HSS = High Speed Steel).

The appropriate quality is guaranteed by the

Bosch accessories program.

Twist drills from 2.5–10 mm can easily be sharp-

ened with the drill bit sharpener (see accesso-

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The gripping surface (soft grip) 6 reduces the

danger of slipping and thereby improves the grip

on the machine and the handling.

At the same time, the rubber coating achieves a

vibration-reducing effect.

Maintenance and Service

Maintenance and Cleaning

f Before any work on the power tool itself,

pull the mains plug.

f For safe and proper working, always keep

the power tool and the ventilation slots

If the power tool should fail despite the care tak-

en in manufacturing and testing procedures, re-

pair should be carried out by an after-sales ser-

vice center for Bosch power tools.

In all correspondence and spare parts orders,

please always include the 10-digit article number

given on the type plate of the power tool.

After-sales service and customer

Our after-sales service responds to your ques-

tions concerning maintenance and repair of your

product as well as spare parts. Exploded views

and information on spare parts can also be found

Our customer consultants answer your questions

concerning best buy, application and adjustment

of products and accessories.

In case of a claim, repair or purchase of replace-

ment parts or in case of queries or other prob-

lems, please contact your local dealer or Bosch

HK and Macau Special Administrative Regions

Melchers (H.K.) Ltd, Room 1210

Shun Tak Centre, West-Tower

168 – 200 Connaught Road, Central Hong Kong

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Liberty Square Building

Bosch Service – Training Centre

2869-2869/1 Soi Ban Kluay

Rama IV Road (near old Paknam Railway)

Republic of Singapore

Robert Bosch (SEA) Pte. Ltd – Vietnam

Representative Office

Saigon Trade Center, Suite 1206

37 Ton Duc Thang Street,

Ben Nghe Ward, District 1

Tel.: +84 (8) 9111 374 – 9111 375

Fax: +84 (8) 9111376

Australia, New Zealand and Pacific Islands

Robert Bosch Australia Pty. Ltd.

Customer Contact Center

Power tools, accessories and packaging should

be sorted for environmental-friendly recycling.

Subject to change without notice.

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OBJ_BUCH-129-002.book Page 31 Tuesday, October 23, 2007 2:57 PM1 609 929 M40 | (23.10.07) Bosch Power Tools 32 | 󳝓󰽤󲞫

d) 󵍵󵥲󶠡󵲉 󵠓󴕝 󵫍󴚢󳾾󴀵󴕝 󵡽󴱹󵨽 󵑙󵨽 󴗈󵲉 󵠓󴕝 󳾼

OBJ_BUCH-129-002.book Page 32 Tuesday, October 23, 2007 2:57 PM󳝓󰽤󲞫 | 33 Bosch Power Tools 1 609 929 M40 | (23.10.07) 󴃹󴕮 󵏭󴵎

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OBJ_BUCH-129-002.book Page 34 Tuesday, October 23, 2007 2:57 PM󳝓󰽤󲞫 | 35 Bosch Power Tools 1 609 929 M40 | (23.10.07) 󵬹󴲆

󴞥󴱽 󵽢 󵁍󶠽󶠡󴃹 ( 󴃁󴲅 E 󵼁󵬹 )

Ø 4mm, 󱀯󲥫 󲝴 50mm 󲥯 󲒛

OBJ_BUCH-129-002.book Page 35 Tuesday, October 23, 2007 2:57 PM1 609 929 M40 | (23.10.07) Bosch Power Tools 36 | 󳝓󰽤󲞫

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Robert Bosch Korea Mechanics and Electronics Ltd.

PERHATIKANLAH OBJ_BUCH-129-002.book Page 47 Tuesday, October 23, 2007 2:57 PM1 609 929 M40 | (23.10.07) Bosch Power Tools

OBJ_BUCH-129-002.book Page 48 Tuesday, October 23, 2007 2:57 PMBahasa Indonesia | 49

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OBJ_BUCH-129-002.book Page 54 Tuesday, October 23, 2007 2:57 PMBahasa Indonesia | 55

mata bor HSS (HSS = High Speed Steel, baja

OBJ_BUCH-129-002.book Page 56 Tuesday, October 23, 2007 2:57 PMTiøng Vi·t | 57

C~NH B|O OBJ_BUCH-129-002.book Page 57 Tuesday, October 23, 2007 2:57 PM1 609 929 M40 | (23.10.07) Bosch Power Tools

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OBJ_BUCH-129-002.book Page 60 Tuesday, October 23, 2007 2:57 PMTiøng Vi·t | 61 Bosch Power Tools 1 609 929 M40 | (23.10.07) Sú lÄp vμo

OBJ_BUCH-129-002.book Page 61 Tuesday, October 23, 2007 2:57 PM1 609 929 M40 | (23.10.07) Bosch Power Tools 62 | Tiøng Vi·t

v◊n vμo khoΩng 35–40 Nm.

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AVERTISSEMENT OBJ_BUCH-129-002.book Page 65 Tuesday, October 23, 2007 2:57 PM1 609 929 M40 | (23.10.07) Bosch Power Tools

OBJ_BUCH-129-002.book Page 66 Tuesday, October 23, 2007 2:57 PMFrançais | 67

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couple (Torque Control)

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OBJ_BUCH-129-002.book Page 73 Tuesday, October 23, 2007 2:57 PM1 609 929 M40 | (9.10.07) Bosch Power Tools

ﱄﺎﻌﻟﺍ ﺫﻻﻮﻔﻟﺍ) = HSS ﺐﻴﻘﺜﺘﻟﺍ ﻢﻘﻟ ﻂﻘﻓ ﻥﺩﺎﻌﳌﺍ ﺐﻴﻘﺜﺗ ﺪﻨﻋ ﻡﺪﺨﺘﺳﺍ

“ﺔﻴﺋﺎﺑﺮﻬﻜﻟﺍ ﺓﺪﻌﻟﺍ” ﺢﻠﻄﺼﻤﺑ ﺪﺼﻘﻳ

ﺩﺎﺘﻋ ﺀﺍﺪﺗﺭﺍ ﺪﳛ .ﺔﻴﻗﺍﻭ ﺕﺍﺭﺎﻈﻧ

(Auto-Lock = ﮏﯿﺗﺎﻣﻮﺗﺍ