Bosch GSB 20-2 User manual

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GSB 20
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GSB 20-2 RE
PROFESSIONAL
Atenção! Leia Antes de usar.
¡Atención! Lea antes de usar.
Attention! Read before using.
Manual de instruções
Manual de instrucciones
Operating instructions

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Imagem Ilustrativa
GSB 20-2 RE
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Technical data
Impact Drill GSB 20-2GSB 20-2 RE
Type nº 0 601 184 1.. 0 601 194 5..
Power [w] 701 701
Amperage 127 V [A] 5,8 5,8
220 V [A] 3,3 3,3
No-Load speed [min-1]1000/3000 0...1000/0...3000
Impacts [min-1]48000 0...48000
Drill Chuck Concrete [mm] 20/13 20/13
Clamping range Steel [mm] 13/08 13/08
13mm (1/2”) Aluminum [mm] 15/10 15/10
Wood [mm] 40/25 40/25
Weight approx. [kg] 2,2 2,2
Safety Class / II / II
Operating controls
1. Chuck 13 mm
2. Spindle
3. Spindle's collar -43 mm Ø
4. Commutator drilling with/without impact
5. Ventilation slots
6. Lock on button
7. Switch
8. Reversing lever (GSB 20-2 RE)
9. Speed commutador
10. Side handle
11. Depth stop rod
12. Chuck key
* Not all of the accessories illustrated or described are
included as standard delivery.
Intended use
Bosch Hammer Drills GSB 20-2 and GSB 20-2 RE have
been developed to execute the more different drilling types
in: steel, aluminum, wood, concrete and others.
By using other accessories, you will be able to do small jobs
of: sanding, polishing, grinding, brushing, etc.
For you safety
Working safely with this machine is possible only
when the operating and safety information are
read completely and the instructions contained
therein are strictly followed. In addition, the general
safety instructions on page 11 must be followed. Before
using for the first time, ask for a practical
demonstration.
If the mains cable is damaged or cut through while
working, do not touch the cable but immediately pull
the mains plug. Never use the machine with a
damaged cable.
Wear ear protection.
Wear safety goggles.
For long hair, wear hair protection.
Hold tools by insulated gripping surfaces when
performing an operation where the drilling tool may
contact hidden wiring or its own cord. Contact with a
“live” wire will make exposed metal parts of the tool
“live” and shock the operator.
•Insert the mains plug only when the machine is switched off.
•Always direct the cable to the rear away from the machine.
•Don't use your tool in damp locations.
•Don't use your tool in the presence of flammable fluids or
gases. Danger of explosion!
•When drilling use the auxiliary handles 10.
• Do not work materials containing asbestos. Asbestos is
considered carcinogenic.
• Take protective measures when dust can develop 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 extraction when connectable.
•If the drilling tool jams it will cause the tool to jolt. If this
occurs switch the tool off immediately.
•When working with the machine, always hold it firmly with
both hands and provide for a secure stance.
•Be careful when screwing in long screws; danger of sliding
off. (GSB 20-2 RE)
•For screws, work using the first gear or with a low speed.
(GSB 20-2 RE)
•Place the machine on the screw/nut only when switched
off. (GSB 20-2 RE)
•Always switch off the machine and allow to come to a stop
before placing it down.
•Never allow children to use the machine.
•Don't use damaged accessories such as stiff bits, worn out
sanding paper, split grinding wheels, etc.
•Do not place such loads on the machine that it ceases to
turn. Damage the motor.
Bosch is only able to ensure perfect functioning of the
machine if the original accessories intended for it are
used.
Side handle
•When drilling use the auxiliary handle 10.
To improve the handling and the safety, always use side
handle.
DEPTH STOP ROD 11.
For serial drills of same depth you have to put the depth stop
11 in the auxiliary handle 10 and to adjust the depth
according to your necessity.
Accessories assembly
Caution! The chuck may be very hot: During longer
working periods, especially when impact drilling, the chuck
can become very hot. In this case we recommend wearing
protective gloves.
•Open the chuck 1 and insert the accessory's shank until it
reaches the bottom of the chuck. Use chuck key 12 to
tighten it up through the three holes of the chuck.
Attention! An accessory shank that has only the tip
fastened: damage the chuck’s and accessory’s and by cause
an accident.
SCREWDRIVER TOOLS (accessories optional -fig. B)
When using screwdriver bits 13, a bit holder 14 should
always be used.
Use only the screwdriver bits that fit the screw head.
For driving screws, position the selector switch 4 to the
symbol “Drilling and Driving”.
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Initial Operation
Do not drill, fasten or cut into blind areas where electric, gas
or water lines may exist. Use appropriate detectors to
determine if these lines are hidden in the work area or call
the local utility company for assistance.
Check for correct mains voltage: The voltage of the power
source must agree with the voltage specified on the
nameplate of the machine.
ON/OFF SWITCH
INTERMITTENT SWITCHING
ON -Press trigger of switch 7.
OFF -Release trigger
CONTINUOUS SWITCHING
ON -Press trigger of switch 7, then lock button 8 and release
it.
OFF -Press and release trigger on switch 7.
CHANGING SPEED
Two speed ranges can be pre-selected with the gear speed
commuted 9:
Speed 1: No-Load speed 1000 min-1
Speed 2: No-Load speed 3000 min-1
Impact drill is built with a sliding key mechanism which has
two positions. The position can be changed more easily
when the motor is almost stopping or stopped.
Rotate lever 10 in 180° to select the opposite position. The
lever seats naturally in position 1 and 2 (1st an 2nd speed). If
there is any difficult in getting the gears to engage when
changing speeds, turn the chuck a little bit by hand.
STEPLESS SPEED CONTROL (GSB 20-2 RE)
The machine runs with variable speed between 0 and
maximum depending on the pressure applied to the On/Off
switch 7. Light pressure results in a low rotational speed thus
allowing smooth, controlled starts.
Attention: Do not load the machine so heavily that it comes
to a standstill.
REVERSION OF THE SENSE OF ROTATION (GSB 20-2 RE)
The reversing lever 8 allows to invert the motor's sense of
rotation, thus enhancing the field of applications with all of
screw driving / removal.
Position: R -right = drilling / screw driving
L -left = screw removal
Attention: To invert the sense of rotation, be sure the motor
is switched off.
• The reversing or anticlockwise operation enables
application for tasks such loosening of screw.
Function with and without impact
Without impact (rotation only)
Turn the commutator drilling with/without impact 4with the
arrow pointing to . In this position you will be able to
drill steel, aluminum, wood, plastic and other materials.
With impact (rotation with impact system)
Turn the commutator drilling with/without impact 4with the
arrow pointing to . In this position you will be able to drill
concrete, stone, wall tiles, bricks and other materials.
Warning! Use your hammer drill only with the arrow of
switch pointing to one of the two positions, or
Never stop in the dead center (between those two positions),
for this will damage the tool.
To change from one system to another rotate the lever 180°
which can be done while the machine is running.
Practical Advice
Select the right bit
By choosing the correct bit for every specific material, and
keeping it correctly sharpened, you'll allow your tool to show
its best performance.
Carbon tipped bits -wood
High speed steel bits -soft steel, aluminum, wood, etc.
Carbide tipped bits -concrete, marble, ceramics, etc.
Attention! When drilling in metal, use special cutting oil to
prevent the bit to burn. Drillings in concrete, stone, ceramics,
etc. should be in dry.
Check the material to be drilled and select the correct bit. Do
not drill with a bit that is inadequate for the job, because this
will damage either your workpiece or the bit itself.
Small workpieces
Use a vise or clamps to hold your workpiece. Loose pieces
could grip int the bit and cause accidents.
Wall tiles and ceramics
Begin to drill without impact and activate the impact system
after drilling through the enamel surface. By doing this, you
prevent the bit to slide or the material to split.
Replacing the Drill Chuck
Use an open-end spanner at spanner surface to retain the
chuck 1. Place the chuck key 12 in one of the 3 bores and
loosen the chuck by turning it to the left using the key as a
lever. If the chuck is frozen in place, a tap on the chuck key
12 should loosen it. The drill chuck is mounted in reverse
order.
The chuck must be tightened with a torque of
approx. 30 –40 Nm.
Maintenance and cleaning
§Before any work on the machine itself, pull the mains
plug.
For safe and proper working, always keep the machine
and the ventilation slots clean.
If the machine should fail despite the care taken in
manufacturing and testing procedures, repair should be
carried out by an authorized after-sales service center for
Bosch power tools.
Guarantee
We guarantee BOSCH appliances in accordance with
statutory/country-specific regulations (proof of purchase by
invoice or delivery note).
Damage attributable to normal wear and tear, overload or
improper handling will be excluded from the guarantee.
In case of complaint please send the machine,
undismantled, to your dealer or the BOSCH Service Center
for electric power tools.
Warning!
Freight and insurance costs are charged to the client, even
for warranty claims.
Environmental protection
Recycle raw materials instead of disposing as waste
The machine, accessories and packaging should be
sorted for environmental-friendly recycling.
The plastic components are labeled for categorized
recycling.

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General power tool safety instructions
.WARNING! Read all safety warnings and all
instructions. Failure to follow the warnings and instructions
may result in electric shock, fire and/or serious injury.
Save all warnings and instructions for future reference.
The term “power tool” in the warnings refers to your mains-
operated (corded) power tool or battery-operated (cordless)
power tool.
SAVE THESE INSTRUCTIONS
1. Work area safety
a) Keep work area clean and well lit. Cluttered and poorly lit
areas can result in accidents.
b) Do not operate power tools in the presence of
flammable liquids, gases or dust. Power tools create
sparks which may ignite the dust or fumes.
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 risk of electric shock
b) Avoid body contact with earthed or grounded surfaces
such as pipes, radiators 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 misuse 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.
Damaged or entangled cords increase the risk of electric
shock.
e) When operating a power tool outdoors, use an
extension cord suitable for outdoor use. Use of a cord
suitable for outdoor use reduces the risk of electric shock.
f) If it is not possible to avoid the use of the power tool in
humid or wet areas, use a residual current device (RCD)
protected supply. Use of an RCD reduces the risk of electric
shock.
g) In case of change need or substitution of the electric
cable, it should be made by an authorized and qualified
technical service. A damaged cable increases the risk of
electric shock.
3) Personal safety
a) Stay alert, watch what you are doing and use common
sense when operating a power tool. Do not use a power
tool while if 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 safety equipment. Always wear eye protection.
Safety equipment such as dust mask, non-skid safety shoes,
hard hat, or hearing protection used for appropriate conditions
will reduce personal injuries.
c) Avoid accidental starting. Ensure the switch is in the
off-position before plugging in. Carrying power tools with
your finger on the switch or plugging in power tools that are
switches on invite accidents.
d) Remove any adjusting key or wrench before switching
on the power tool. A wrench or a key left attached to a
rotating part of the power tool may result in personal injury.
e) Do not overreach. Keep proper footing and balance at
all times. This enables better control of the power tool in
unexpected situations.
f) Dress properly. Do not wear loose clothing or jewellery.
Keep your hair, clothing and gloves away from moving
parts. Loose clothes, jewellery or long hair can be caught in
moving parts.
g) If devices are provided for the connection of dust ex-
traction and collection facilities, ensure these are
connected and properly used. Use of these devices can
reduce dust related hazards.
h) Use ear protectors. Exposure to noise can cause hearing
loss.
i) Use auxiliary handles supplied with the tool. Loss of
control can cause personal injury.
4) Power tool use and care
a) Do not force the power tool. Use the correct power tool
for your application. The correct power tool will do the job
better and safer.
b) Do not use the power tool if the switch does not turn it
on and 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
adjustments, changing accessories, or storing power
tools. Such preventive safety measures reduce the risk of
starting the power tool accidentally.
d) Store idle power tools out of the reach of children and
do not allow persons unfamiliar with the power tool or
these instructions to operate the power tool. Power tools
can cause injuries in the hands of untrained users.
e) Maintain power tools. Check for misalignment or
binding of moving parts, breakage of parts and any other
condition that may affect the power tools operation. If
damaged, have the power tool repaired before use.
Accidents are caused by poorly maintained power tools.
f) Keep cutting tools sharp and clean. Properly maintained
cutting tools with sharp cutting edges are less likely to bind
and are easier to control.
g) Use the power tool, accessories and tool bits etc. in
accordance with these instructions and in the manner
intended for the particular type of power tool, taking into
account the working conditions and the work to be
performed. Use of the power tool for operations different
from those intended could result in injuries.
5) Service
a) Have your power tool serviced by a qualified repair
person using only identical replacement parts. This will
ensure that the safety of the power tool is maintained.
b) The substitution of the brushes of the power tool
should be accomplished by an authorized and qualified
technical service. Brushes out of specification can cause
damages to the motor of the power tool.
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