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 mainsoperated (corded) power tool or battery-operated (cordless) power tool.
Work area safety
u Keep work area clean and well lit. Cluttered or dark
areas invite accidents.
u 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 dust
or fumes.
u Keep children and bystanders away while operating a
power tool. Distractions can cause you to lose control.
Electrical safety
u 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.
u Avoid body contact with earthed or grounded sur-
faces, such as pipes, radiators, ranges and refrigerators. There is an increased risk of electric shock if your
body is earthed or grounded.
u Do not expose power tools to rain or wet conditions.
Water entering a power tool will increase the risk of electric shock.
u Do not abuse the cord. Never use the cord for carry-
ing, 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.
u When operating a power tool outdoors, use an exten-
sion cord suitable for outdoor use. Use of a cord suitable for outdoor use reduces the risk of electric shock..
u If operating a power tool in a damp location is un-
avoidable, use a residual current device (RCD) protected supply. Use of an RCD reduces the risk of electric
shock.
Personal safety
u 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 inatten-
tion while operating power tools may result in serious personal injury.
Read all safety warnings and all instructions. Failure to follow the
u Use personal protective equipment. Always wear eye
protection. Protective equipment such as dust mask,
non-skid safety shoes, hard hat, or hearing protection
used for appropriate conditions will reduce personal injuries.
u Prevent unintentional starting. Ensure the switch is in
the off-position before connecting to power source
and/or battery pack, picking up or carrying the tool.
Carrying power tools with your finger on the switch or energising power tools that have the switch on invites accidents.
u Remove any adjusting key or wrench before turning
the power tool on. A wrench or a key left attached to a
rotating part of the power tool may result in personal injury.
u Do not overreach. Keep proper footing and balance at
all times. This enables better control of the power tool in
unexpected situations.
u Dress properly. Do not wear loose clothing or jew-
ellery. Keep your hair, clothing and gloves away from
moving parts. Loose clothes, jewellery or long hair can
be caught in moving parts.
u If devices are provided for the connection of dust ex-
traction and collection facilities, ensure these are connected and properly used. Use of dust collection can re-
duce dust-related hazards.
Power tool use and care
u 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 at the rate for which it was designed.
u 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.
u 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.
u 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 are dangerous in the hands of untrained users.
u Maintain power tools. Check for misalignment or bind-
ing of moving parts, breakage 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.
u Keep cutting tools sharp and clean. Properly main-
tained cutting tools with sharp cutting edges are less
likely to bind and are easier to control.
u Use the power tool, accessories and tool bits etc. in
accordance with these instructions, taking into account the working conditions and the work to be per-
1 609 92A 5RK | (07.10.2020)Bosch Power Tools
English | 7
formed. Use of the power tool for operations different
from those intended could result in a hazardous situation.
Battery tool use and care
u Recharge only with the charger specified by the manu-
facturer. A charger that is suitable for one type of battery pack may create a risk of fire when used with another
battery pack.
u Use power tools only with specifically designated bat-
tery packs. Use of any other battery packs may create a
risk of injury and fire.
u When battery pack is not in use, keep it away from
other metal objects, like paper clips, coins, keys,
nails, screws or other small metal objects, that can
make a connection from one terminal to another.
Shorting the battery terminals together may cause burns
or a fire.
u Under abusive conditions, liquid may be ejected from
the battery; avoid contact. If contact accidentally occurs, flush with water. If liquid contacts eyes, additionally seek medical help. Liquid ejected from the bat-
tery may cause irritation or burns.
Service
u 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.
Safety information for the angle grinder
Safety Warnings common for Grinding, Sanding, Wire
Brushing or Abrasive Cutting Off operations
u This power tool is intended to function as a grinder,
sander, wire brush or cut-off tool. Read all safety
warnings, instructions, illustrations and specifications provided with this power tool. Failure to follow all
instructions listed below may result in electric shock, fire
and/or serious injury.
u Operations such as polishing are not recommended to
be performed with this power tool. Operations for
which the power tool was not designed may create a hazard and cause personal injury.
u Do not use accessories which are not specifically de-
signed and recommended by the tool manufacturer.
Just because the accessory can be attached to your
power tool, it does not assure safe operation.
u The rated speed of the accessory must be at least
equal to the maximum speed marked on the power
tool. Accessories running faster than their rated speed
can break and fly apart.
u The outside diameter and the thickness of your ac-
cessory must be within the capacity rating of your
power tool. Incorrectly sized accessories cannot be ad-
equately guarded or controlled.
u Threaded mounting of accessories must match the
grinder spindle thread. For accessories mounted by
flanges, the arbour hole of the accessory must fit the
locating diameter of the flange. Accessories that do not
match the mounting hardware of the power tool will run
out of balance, vibrate excessively and may cause loss of
control.
u Do not use a damaged accessory. Before each use in-
spect the accessory such as abrasive wheels for chips
and cracks, backing pad for cracks, tear or excess
wear, wire brush for loose or cracked wires. If power
tool or accessory is dropped, inspect for damage or install an undamaged accessory. After inspecting and
installing an accessory, position yourself and bystanders away from the plane of the rotating accessory and
run the power tool at maximum no load speed for one
minute. Damaged accessories will normally break apart
during this test time.
u Wear personal protective equipment. Depending on
application, use face shield, safety goggles or safety
glasses. As appropriate, wear dust mask, hearing protectors, gloves and workshop apron capable of stopping small abrasive or workpiece fragments. The eye
protection must be capable of stopping flying debris generated by various operations . The dust mask or respirator must be capable of filtrating particles generated by
your operation. Prolonged exposure to high intensity
noise may cause hearing loss.
u Keep bystanders a safe distance away from work area.
Anyone entering the work area must wear personal
protective equipment. Fragments of workpiece or of a
broken accessory may fly away and cause injury beyond
immediate area of operation.
u Hold the power tool by insulated gripping surfaces
only, when performing an operation where the cutting
accessory may contact hidden wiring. Cutting access-
ory contacting a "live" wire may make exposed metal
parts of the power tool "live" and could give the operator
an electric shock.
u Never lay the power tool down until the accessory has
come to a complete stop. The spinning accessory may
grab the surface and pull the power tool out of your control.
u Do not run the power tool while carrying it at your
side. Accidental contact with the spinning accessory
could snag your clothing, pulling the accessory into your
body.
u Regularly clean the power tool’s air vents. The motor’s
fan will draw the dust inside the housing and excessive
accumulation of powdered metal may cause electrical
hazards.
u Do not operate the power tool near flammable materi-
als. Sparks could ignite these materials.
u Do not use accessories that require liquid coolants.
Using water or other liquid coolants may result in electrocution or shock.
Kickback and Related Warnings
Kickback is a sudden reaction to a pinched or snagged rotating wheel, backing pad, brush or any other accessory. Pinching or snagging causes rapid stalling of the rotating access-
Bosch Power Tools1 609 92A 5RK | (07.10.2020)
8 | English
ory which in turn causes the uncontrolled power tool to be
forced in the direction opposite of the accessory’s rotation
at the point of the binding.
For example, if an abrasive wheel is snagged or pinched by
the workpiece, the edge of the wheel that is entering into the
pinch point can dig into the surface of the material causing
the wheel to climb out or kick out. The wheel may either
jump toward or away from the operator, depending on direction of the wheel’s movement at the point of pinching. Abrasive wheels may also break under these conditions.
Kickback is the result of power tool misuse and/or incorrect
operating procedures or conditions and can be avoided by
taking proper precautions as given below.
u Maintain a firm grip on the power tool and position
your body and arm to allow you to resist kickback
forces. Always use auxiliary handle, if provided, for
maximum control over kickback or torque reaction
during start-up. The operator can control torque reac-
tions or kickback forces, if proper precautions are taken.
u Never place your hand near the rotating accessory.
Accessory may kickback over your hand.
u Do not position your body in the area where power
tool will move if kickback occurs. Kickback will propel
the tool in direction opposite to the wheel’s movement at
the point of snagging.
u Use special care when working corners, sharp edges
etc. Avoid bouncing and snagging the accessory.
Corners, sharp edges or bouncing have a tendency to
snag the rotating accessory and cause loss of control or
kickback.
u Do not attach a saw chain woodcarving blade or
toothed saw blade. Such blades create frequent kickback and loss of control.
Safety Warnings specific for Grinding and Abrasive
Cutting-Off operations
u Use only wheel types that are recommended for your
power tool and the specific guard designed for the selected wheel. Wheels for which the power tool was not
designed cannot be adequately guarded and are unsafe.
u The grinding surface of centre depressed wheels must
be mounted below the plane of the guard lip. An improperly mounted wheel that projects through the plane
of the guard lip cannot be adequately protected.
u The guard must be securely attached to the power tool
and positioned for maximum safety, so the least
amount of wheel is exposed towards the operator.
The guard helps to protect operator from broken wheel
fragments, accidental contact with wheel and sparks that
could ignite clothing.
u Wheels must be used only for recommended applica-
tions. For example: do not grind with the side of cutoff wheel. Abrasive cut-off wheels are intended for peri-
pheral grinding, side forces applied to these wheels may
cause them to shatter.
u Always use undamaged wheel flanges that are of cor-
rect size and shape for your selected wheel. Proper
wheel flanges support the wheel thus reducing the possibility of wheel breakage. Flanges for cut-off wheels may
be different from grinding wheel flanges.
u Do not use worn down wheels from larger power
tools. Wheel intended for larger power tool is not suitable for the higher speed of a smaller tool and may burst.
Additional Safety Warnings specific for Abrasive Cutting
Off operations
u Do not “jam” the cut-off wheel or apply excessive
pressure. Do not attempt to make an excessive depth
of cut. Overstressing the wheel increases the loading
and susceptibility to twisting or binding of the wheel in
the cut and the possibility of kickback or wheel breakage.
u Do not position your body in line with and behind the
rotating wheel. When the wheel, at the point of operation, is moving away from your body, the possible kickback may propel the spinning wheel and the power tool
directly at you.
u When wheel is binding or when interrupting a cut for
any reason, switch off the power tool and hold the
power tool motionless until the wheel comes to a complete stop. Never attempt to remove the cut-off wheel
from the cut while the wheel is in motion otherwise
kickback may occur. Investigate and take corrective ac-
tion to eliminate the cause of wheel binding.
u Do not restart the cutting operation in the workpiece.
Let the wheel reach full speed and carefully re-enter
the cut. The wheel may bind, walk up or kickback if the
power tool is restarted in the workpiece.
u Support panels or any oversized workpiece to minim-
ize the risk of wheel pinching and kickback. Large
workpieces tend to sag under their own weight. Supports
must be placed under the workpiece near the line of cut
and near the edge of the workpiece on both sides of the
wheel.
u Use extra caution when making a “pocket cut” into ex-
isting walls or other blind areas. The protruding wheel
may cut gas or water pipes, electrical wiring or objects
that can cause kickback.
Safety Warnings specific for Sanding operations
u Do not use excessively oversized sanding disc paper.
Follow manufacturers recommendations, when selecting sanding paper. Larger sanding paper extending bey-
ond the sanding pad presents a laceration hazard and
may cause snagging, tearing of the disc, or kickback.
Safety Warnings specific for Wire Brushing operations
u Be aware that wire bristles are thrown by the brush
even during ordinary operation. Do not overstress the
wires by applying excessive load to the brush The wire
bristles can easily penetrate light clothing and/or skin.
u If the use of a guard is recommended for wire brush-
ing, do not allow any interference of the wire wheel or
brush with the guard. Wire wheel or brush may expand
in diameter due to work load and centrifugal forces.
1 609 92A 5RK | (07.10.2020)Bosch Power Tools
English | 9
Additional safety information
Wear safety goggles.
u Use suitable detectors to determine if there are hid-
den supply lines or contact the local utility company
for assistance. Contact with electric cables can cause
fire and electric shock. Damaging gas lines can lead to explosion. Breaking water pipes causes property damage.
u Do not touch grinding and cutting discs until they have
cooled down. The discs can become very hot while working.
u Release the On/Off switch and set it to the Off posi-
tion when the power supply is interrupted, e.g. when
the battery pack is removed. This prevents uncontrolled
restarting.
u Secure the workpiece. A workpiece clamped with
clamping devices or in a vice is held more secure than by
hand.
u In case of damage and improper use of the battery, va-
pours may be emitted. The battery can set alight or explode. Ensure the area is well ventilated and seek medical
attention should you experience any adverse effects. The
vapours may irritate the respiratory system.
u Do not open the battery. There is a risk of short-circuit-
ing.
u The battery can be damaged by pointed objects such
as nails or screwdrivers or by force applied externally.
An internal short circuit may occur, causing the battery to
burn, smoke, explode or overheat.
u Only use the battery with products from the manufac-
turer. This is the only way in which you can protect the
battery against dangerous overload.
Protect the battery against heat, e.g. against
continuous intense sunlight, fire, dirt, water
and moisture. There is a risk of explosion and
short-circuiting.
u Caution! When using the power tool with Bluetooth
®
, a
fault may occur in other devices and systems, aeroplanes and medical devices (e.g. pacemakers, hearing
aids). Also, damage to people and animals in the immediate vicinity cannot be completely excluded. Do
not use the power tool with Bluetooth® in the vicinity of
medical devices, petrol stations, chemical plants,
areas with a potentially explosive atmosphere or in
blasting areas. Do not use the power tool with
Bluetooth® in aircraft. Avoid using the product near
your body for extended periods.
The Bluetooth® word mark and logos are registered trademarks owned by Bluetooth SIG, Inc. and any use of such
marks by Robert Bosch Power Tools GmbH is under license.
Product Description and
Specifications
Read all the safety and general instructions.
Failure to observe the safety and general instructions may result in electric shock, fire
and/or serious injury.
Please observe the illustrations at the beginning of this operating manual.
Intended use
The power tool is intended for cutting, roughing and brushing metal and stone materials without the use of water.
A special protective guard for cutting must be used when
cutting bonded abrasives.
Sufficient dust extraction must be provided when cutting
stone.
With approved abrasive tools, the power tool can be used for
sanding with sanding discs.
With the Bluetooth® Low Energy Module GCY42 inserted,
power tool data and settings can be transferred between the
power tool and a mobile device by means of Bluetooth® wireless technology.
Product Features
The numbering of the product features refers to the diagram
of the power tool on the graphics page.
Auxiliary handle (insulated gripping surface)
Protective guard for grinding
Mounting flange with O‑ring
Grinding disc
Clamping nut
Carbide grinding head
Protective guard for cutting
Cutting disc
A)
A)
A)
Handle (insulated gripping surface)
Grinding spindle
Hand guard
Rubber sanding pad
Abrasive disc
Round nut
Cup brush
Diamond core bit
A)
A)
A)
A)
A)
A)
Bosch Power Tools1 609 92A 5RK | (07.10.2020)
10 | English
Battery charge indicator (user interface)
(25)
Kickback shutdown indicator (user interface)
(26)
Speed preselection button (user interface)
(27)
Speed setting/mode indicator (user interface)
(28)
Smartphone indicator (user interface)
(29)
Power tool status indicator (user interface)
(30)
Temperature indicator (user interface)
(31)
(32)
A)
Accessories shown or described are not included with the
product as standard. You can find the complete selection of
accessories in our accessories range.
Flap disc
A)
Technical Data
Angle grinderGWS 18V-15 CGWS 18V-15 SC
Article number
Rated voltageV=1818
Rated speed
No-load speed
A)
B)
min
min
-1
-1
Max. grinding disc diametermm100100
Grinding spindle threadM 10M 10
Max. thread length of grinding spindlemm1616
Kickback stop●●
Restart protection●●
Run-out brake●●
Speed preselection–●
Weight according to EPTA-Procedure01:2014
C)
– with low-vibration auxiliary handlekg2.5–3.52.5–3.5
– with standard auxiliary handlekg2.3–3.32.3–3.3
Recommended ambient temperature during charging°C0...+350...+35
Permitted ambient temperature during operationD) and
°C–20...+50–20...+50
during storage
Compatible rechargeable batteriesGBA 18V...
Recommended rechargeable batteries for maximum
ProCORE18V... ≥5.5AhProCORE18V... ≥5.5Ah
performance
Recommended chargersGAL 18...
Data transmission
®
Bluetooth
Signal intervals88
Max. signal range
A) Rated speed in accordance with EN 60745-2-3
B) Measured at 20–25°C with rechargeable battery ProCORE18V8.0Ah and depending on the battery's state of charge as well as the tool's
operating temperature
C) Depends on battery in use
D) Limited performance at temperatures <0°C
E) The mobile terminal devices must be compatible with Bluetooth® Low Energy devices (version 4.2) and support the Generic Access Profile
(GAP).
F) The signal range may vary greatly depending on external conditions, including the receiving device used. The Bluetooth® range may be signi-
ficantly weaker inside closed rooms and through metallic barriers (e.g. walls, shelving units, cases, etc.).
F)
m3030
3601JH60..3601JH61..
11,00011,000
98003400–9800
GBA 18V...
ProCORE18V...
ProCORE18V...
GAL 18...
GAX 18...
GAL 36...
Bluetooth®4.2
(Low Energy)
E)
GAX 18...
GAL 36...
Bluetooth®4.2
(Low Energy)
E)
1 609 92A 5RK | (07.10.2020)Bosch Power Tools
English | 11
Fitting
Using the GCY42 Bluetooth® Low Energy
Module
Note: The GCY42 Bluetooth ® Low Energy Module is avail-
able as an accessory with GWS18V-15C power tools; it is
included in the scope of delivery for GWS18V-15SC power
tools.
Read the corresponding operating instructions for information about the Bluetooth® Low Energy ModuleGCY42.
Charging the battery
u Use only the chargers listed in the technical data. Only
these chargers are matched to the lithium-ion battery of
your power tool.
Note: The battery is supplied partially charged. To ensure
full battery capacity, fully charge the battery in the charger
before using your power tool for the first time.
The lithium-ion battery can be charged at any time without
reducing its service life. Interrupting the charging process
does not damage the battery.
The lithium-ion battery is protected against deep discharge
by the "Electronic Cell Protection (ECP)". When the battery
is discharged, the power tool is switched off by means of a
protective circuit: The application tool no longer rotates.
u Do not continue to press the On/Off switch after the
power tool has automatically switched off. The battery
can be damaged.
Follow the instructions on correct disposal.
Removing the Battery
The battery (7) is equipped with two locking levels to prevent the battery from falling out if the battery release button
(8) is pressed unintentionally. As long as the battery is inserted in the power tool, it is held in position by means of a
spring.
To remove the battery (7), press the release button (8) and
pull the battery out of the power tool. Do not use force to
do this.
Battery charge indicator
The green LEDs on the battery charge indicator indicate the
state of charge of the battery. For safety reasons, it is only
possible to check the state of charge when the power tool is
not in operation.
Press the button for the battery charge indicator or to
show the state of charge. This is also possible when the battery is removed.
If no LED lights up after pressing the button for the battery
charge indicator, then the battery is defective and must be
replaced.
Note: The state of charge of the battery is also displayed on
the user interface(4) (see "Status Indicators", page14).
Battery model GBA 18V...
LEDsCapacity
3× continuous green light60−100%
2× continuous green light30−60%
1× continuous green light5−30%
1× flashing green light0−5%
Battery model ProCORE18V...
LEDsCapacity
5× continuous green light80−100%
4× continuous green light60−80%
3× continuous green light40−60%
2× continuous green light20−40%
1× continuous green light5−20%
1× flashing green light0−5%
Fitting Protective Equipment
u Remove the battery from the power tool before carry-
ing out work on the power tool (e.g. maintenance,
changing tool, etc.). The battery should also be removed for transport and storage. There is risk of injury
from unintentionally pressing the on/off switch.
Note: If the grinding disc breaks during operation or the
holding fixtures on the protective guard/power tool become
damaged, the power tool must be sent to the after-sales service immediately; see the "After-Sales Service and Application Service" section for addresses.
Protective guard for grinding
Place the protective guard
(10) onto the holder on the
power tool until the coding
cams of the protective guard
are aligned with the holder.
When doing so, press and
hold the unlocking lever (1).
Press the protective guard
(10) onto the spindle collar
until the shoulder of the protective guard is sitting on the
flange of the power tool and
rotate the protective guard
until it audibly clicks into
place.
Adjust the position of the protective guard (10) to meet the
requirements of the operation. To do this, push the unlocking lever (1) upward and rotate the protective guard (10)
into the required position.
Bosch Power Tools1 609 92A 5RK | (07.10.2020)
12 | English
u Always position the protective guard(10)such that
the two cams on the unlocking lever(1) engage in the
corresponding openings on the protective guard(10).
u Adjust the protective guard (10) such that sparking in
the direction of the operator is prevented.
u The protective guard (10) must only be adjustable
while the unlocking lever (1) is actuated. Otherwise,
the power tool must not be used any more under any
circumstances and must be sent to the after-sales service.
Note: The coding cams on the protective guard (10) ensure
that only a protective guard that is suitable for the power
tool can be fitted.
Protective guard for cutting
u Always use the protective guard for cutting (15) when
cutting bonded abrasives.
u Provide sufficient dust extraction when cutting stone.
The protective guard for cutting (15) is fitted in the same
way as the protective guard for grinding (10).
Side handle
u Do not operate your power tool without the side
handle(9).
Screw the side handle (9) on the left or right of the machine
head depending on how your are working.
Low-vibration auxiliary handle
The low-vibration auxiliary
handle reduces vibration,
enabling the tool to be used
safely and more comfort-
ably.
u Do not make any alterations of any kind to the auxili-
ary handle.
Do not continue to use a damaged auxiliary handle.
Hand guard
u Always fit the hand guard (19) when working with the
rubber sanding plate (20) or with the cup brush/disc
brush/flap disc.
Attach the hand guard (19) to the side handle (9).
Fitting the abrasive tools
u Remove the battery from the power tool before carry-
ing out work on the power tool (e.g. maintenance,
changing tool, etc.). The battery should also be removed for transport and storage. There is risk of injury
from unintentionally pressing the on/off switch.
u Do not touch grinding and cutting discs until they have
cooled down. The discs can become very hot while working.
Clean the grinding spindle (18) and all the parts to be fitted.
Lock the grinding spindle with the spindle lock button (3)
before clamping and releasing the abrasive tools.
u Do not press the spindle lock button while the grind-
ing spindle is moving. The power tool may become damaged if you do this.
Grinding/Cutting Disc
Pay attention to the dimensions of the grinding tools. The
mounting hole diameter must fit the mounting flange without
play. Do not use reducers or adapters.
When using diamond cutting discs, pay attention that the
direction-of-rotation arrow on the diamond cutting disc and
the direction of rotation of the machine (see direction-of-rotation arrow on the machine head) agree.
See graphics page for the mounting sequence.
To fasten the grinding/cutting disc, screw on the clamping
nut (13) and tighten with the two-hole spanner.
u After fitting the abrasive tool, check that the abrasive
tool is fitted correctly and can turn freely before
switching on the power tool. Make sure that the abrasive tool does not brush against the protective guard or
other parts.
Flap disc
u Always fit the hand guard (19) when working with the
flap disc.
Rubber Sanding Pad
u Always fit the hand guard (19) when working with the
rubber sanding pad (20).
See the graphics page for fitting instructions.
Slide the rubber sanding pad (20) onto the grinding spindle
(18).
Press the sanding sheet (21) firmly onto the underside of
the rubber sanding pad (20).
Screw on the round nut (22) and tighten with a two-pin
spanner.
Cup brush/disc brush
u Always fit the hand guard (19) when working with the
cup brush or disc brush.
See the graphics page for fitting instructions.
The cup brush/disc brush must be screwed onto the grinding
spindle until it rests firmly against the grinding spindle flange
at the end of the grinding spindle thread. Tighten the cup
brush/disc brush with an open-ended spanner.
Carbide Grinding Head
u A grinding head may be used only with a suitable pro-
tective guard.
Approved abrasive tools
You can use all the abrasive tools mentioned in these operating instructions.
The permissible speed [min-1] or the circumferential speed
[m/s] of the abrasive tools used must at least match the values given in the table.
It is therefore important to observe the permissible rota-tional/circumferential speed on the label of the abrasive
tool.
1 609 92A 5RK | (07.10.2020)Bosch Power Tools
English | 13
max. [mm][mm]
Dbd[min-1][m/s]
10071611,00080
u Avoid dust accumulation at the workplace. Dust can
easily ignite.
Operation
Start-up
100––11,00080
7530M 1411,00045
82–M 1411,00080
Rotating the Machine Head (GWS 18V-15 C)
u Remove the battery from the power tool before carry-
ing out work on the power tool (e.g. maintenance,
changing tool, etc.). The battery should also be removed for transport and storage. There is risk of injury
from unintentionally pressing the on/off switch.
The machine head can be
rotated in 90° increments.
In this way, the on/off
switch can be brought into
a more favourable handling
position for particular applications, e.g. for lefthanded tool users.
Completely unscrew the
four screws. Rotate the ma-
chine head carefully, without removing it from the hous-ing, into the new position. Screw in and retighten the four
screws.
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 carcinogenic, especially in connection with wood-treatment 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 ma-
terials to be worked.
Speed Preselection (GWS 18V-15 SC)
The factory settings include three preset speeds. Using a special application (Bosch Toolbox app), up to six speed settings can
be programmed.
Inserting the battery
Push the charged battery (7) into the base of the power tool
from the front until the battery is securely locked.
Switching on/off
To start the power tool, push the on/off switch (5) forward.
To lock the on/off switch (5) in position, push the on/off
switch (5) forward and down until it clicks into place.
To switch off the power tool, release the on/off switch (5);
or, if the switch is locked, briefly push the on/off switch (5)
backward and down and then release it.
u Always check abrasive tools before using them. The
abrasive tool must be fitted properly and be able to
move freely. Carry out a test run for at least one
minute with no load. Do not use abrasive tools that are
damaged, run untrue or vibrate during use. Damaged
abrasive tools can burst apart and cause injuries.
Kickback stop
If there is a sudden kickback in the power tool,
e.g. jamming in a separating cut, the power
supply to the motor will be interrupted electronically. The kickback stop indicator(26)
then lights up. When kickback stop is activ-
ated, the status indicator (30) flashes red.
To restart the tool, set the on/off switch (5) to the off posi-
tion and then switch the power tool on again.
Restart protection
The restart protection feature prevents the power tool from
starting unintentionally after the power supply to it has been
interrupted.
When restart protection is activated, the status indicator
(30) flashes red.
To restart the tool, set the on/off switch (5) to the off position and then switch the power tool on again.
Impact shutdown
The integrated impact shutdown switches the power tool off
as soon as it hits the floor. The status indicator (30) then
flashes red.
To restart the tool, set the on/off switch (5) to the off position and then switch the power tool on again.
User interface (see figure A)
The user interface (4) is used to preselect the speed and to
indicate the status of the power tool.
Bosch Power Tools1 609 92A 5RK | (07.10.2020)
14 | English
If the number of speeds is changed, the values of the preset individual speed settings are adjusted. In this case, the speed setting/mode indicator(28) lights up white. If a speed value is individually programmed, the speed setting/mode indicator(28)
lights up blue for this speed setting (i.e. does not correspond to a default setting). It is possible to individually adjust the speed
settings in steps of 200min-1. Keep in mind the logically ascending sequence of the settings (2≥1, 3≥2, etc.) when doing so.
The following table shows the preset speeds (default settings) for each programmed number of settings.
GWS 18V-15 SCBasic speed setting at level
123456
[min-1][min-1][min-1][min-1][min-1][min-1]
Number of speed settings
1
2
3
4
5
6
The specified speed setting values depend on the rechargeable battery in use, the battery's state of charge and the tool's operating temperature.
3400–––––
34009800––––
340066009800–––
3400560076009800––
34005000660082009800–
340046006000720086009800
You can use the button for speed preselection (27) to preselect the required speed, even during operation. The information in
the table below describes the recommended values for the default settings with 3 preset speed levels.
MetalBrushing, removing rust Cup brush13400
Stainless steelGrindingFibre disc26600
MetalRough grindingGrinding disc3max.
MetalCuttingGrinding disc3max.
StoneCuttingDiamond cutting disc and
3max.
cutting guide (cutting of
stone is permitted only
with a cutting guide)
u The rated speed of the accessory must be at least
equal to the maximum speed marked on the power
tool. Accessories running faster than their rated speed
can break and fly apart.
Status indications
Battery charge indicator
Meaning/causeSolution
(user interface)(25)
GreenBattery charged–
YellowBattery almost emptyReplace or charge battery soon
RedBattery emptyReplace or charge battery
Temperature indicator(31) Meaning/causeSolution
YellowCritical temperature has been reached (mo-
tor, electronics, battery)
Run the power tool at no load and allow it to
cool down
RedPower tool is overheated and will switch offLeave the power tool to cool down
Power tool status
Meaning/causeSolution
indicator(30)
GreenStatus OK–
YellowCritical temperature has been reached or bat-
tery is almost empty
Run the power tool at no load and allow it to
cool down, or replace or charge the battery
soon
1 609 92A 5RK | (07.10.2020)Bosch Power Tools
English | 15
Power tool status
Meaning/causeSolution
indicator(30)
Illuminated redPower tool has overheated or battery is empty Allow the power tool to cool down, or replace
or charge the battery
Flashing redKickback shutdown, restart protection or im-
Turn the power tool off and on again
pact shutdown has been triggered
Flashing bluePower tool is connected to a mobile device or
–
settings are being transferred
Connectivity functions
In conjunction with the Bluetooth® Low Energy Module
GCY42, the following connectivity functions are available
for the power tool:
– Registration and personalisation
– Status check, output of warning messages
– General information and settings
– Management
Read the corresponding operating instructions for informa-
tion about the Bluetooth® Low Energy ModuleGCY42.
The connection of the power tool with the app must be con-
firmed by pressing the speed preselection button (27) on
the user interface (4). The app requests this when connecting.
Practical advice
u With the Bluetooth® Low Energy Module GCY 42, the
power tool is equipped with a radio interface. Local
operating restrictions, e.g. in aircraft or hospitals,
must be observed.
u In areas where the Bluetooth® wireless technology is
not allowed to be used, the Bluetooth® Low Energy
Module GCY42 and the button cell must be removed.
u Exercise caution when cutting slots in structural walls;
see the "Information on structural design" section.
u Clamp the workpiece if it is not secure under its own
become too hot or discolour and that grooves are not
formed.
Flap disc
The flap disc (accessory) enables you to machine curved
surfaces and profiles.
Flap discs have a considerably longer service life, lower
noise levels and lower sanding temperatures than conventional grinding discs.
Cutting metal
u Always use the protective guard for cutting (15) when
cutting bonded abrasives.
When carrying out abrasive cutting, use a moderate feed
that is suited to the material being machined. Do not exert
pressure on the cutting disc and do not tilt or swing the
power tool.
Do not attempt to reduce the speed of a cutting disc coming
to a stop by applying pressure from the side.
The power tool must always
work in an up-grinding motion. Otherwise there is a
risk that it will be pushed
uncontrolled out of the cut.
For best results when cutting profiles and rectangular
tubing, start at the smallest
cross section.
weight.
u Do not load the power tool so heavily that it comes to a
stop.
u If the power tool has been subjected to a heavy load,
continue to run it at no-load for several minutes to
cool down the accessory.
u Do not use the power tool with a cut-off stand.
u Do not touch grinding and cutting discs until they have
cooled down. The discs can become very hot while working.
If the power tool becomes electrostatically charged, the
built-in electronics will switch the power tool off. Press the
on/off switch (5) again to restart the power tool.
Rough grinding
u Never use cutting discs for rough grinding.
The best rough grinding results are achieved with a set angle
of 30° to 40°. Move the power tool back and forth with moderate pressure. This will ensure that the workpiece does not
Cutting stone
u Provide sufficient dust extraction when cutting stone.
u Wear a dust mask.
u The power tool may be used only for dry cutting/grind-
ing.
For best results when cutting stone, use a diamond cutting
disc.
When cutting especially hard materials such as concrete
with a high pebble content, the diamond cutting disc can
overheat and become damaged as a result. This is clearly indicated by circular sparking, rotating with the diamond cutting disc.
If this happens, stop cutting and allow the diamond cutting
disc to cool down by running the power tool for a short time
at maximum speed with no load.
Working noticeably slower and with circular sparking indicate that the diamond cutting disc that has become dull. You
Bosch Power Tools1 609 92A 5RK | (07.10.2020)
16 | 中文
can resharpen the disc by briefly cutting into abrasive material (e.g. lime-sand brick).
Information on structural design
Slots in load-bearing walls are subject to DIN 1053 part 1 or
country-specific regulations. These regulations must be observed under all circumstances. Seek advice from the responsible structural engineer, architect or construction supervisor before starting work.
Recommendations for optimal handling of the battery
Protect the battery against moisture and water.
Only store the battery only within a temperature range of -20
to 50 °C. Do not leave the battery in your car in the summer,
for example.
Occasionally clean the ventilation slots on the battery using a
soft brush that is clean and dry.
A significantly reduced operating time after charging indicates that the battery has deteriorated and must be replaced.
Follow the instructions on correct disposal.
Maintenance and Service
Maintenance and Cleaning
u Remove the battery from the power tool before carry-
ing out work on the power tool (e.g. maintenance,
changing tool, etc.). The battery should also be removed for transport and storage. There is risk of injury
from unintentionally pressing the on/off switch.
u To ensure safe and efficient operation, always keep
the power tool and the ventilation slots clean.
Store and handle the accessories carefully.
After-Sales Service and Application Service
Our after-sales service responds to your questions concerning maintenance and repair of your product as well as spare
parts. You can find explosion drawings and information on
spare parts at: www.bosch-pt.com
The Bosch product use advice team will be happy to help you
with any questions about our products and their accessories.
In all correspondence and spare parts orders, please always
include the 10‑digit article number given on the nameplate
of the product.
Malaysia
Robert Bosch Sdn. Bhd.(220975-V) PT/SMY
No. 8A, Jalan 13/6
46200 Petaling Jaya
Selangor
Tel.: (03) 79663194
Toll-Free: 1800 880188
Fax: (03) 79583838
E-Mail: kiathoe.chong@my.bosch.com
www.bosch-pt.com.my
You can find further service addresses at:
www.bosch-pt.com/serviceaddresses
Transport
The contained lithium-ion batteries are subject to the Dangerous Goods Legislation requirements. The batteries are
suitable for road-transport by the user without further restrictions.
When shipping by third parties (e.g.: by air transport or forwarding agency), special requirements on packaging and labelling must be observed. For preparation of the item being
shipped, consulting an expert for hazardous material is required.
Dispatch battery packs only when the housing is undamaged. Tape or mask off open contacts and pack up the battery in such a manner that it cannot move around in the
packaging. Please also observe the possibility of more detailed national regulations.
Disposal
Power tools, rechargeable batteries, accessories and packaging should be sorted for environmental-friendly recycling.
Do not dispose of power tools and batteries/rechargeable batteries into household waste!
Battery packs/batteries:
Li-ion:
Please observe the notes in the section on transport (see
"Transport", page16).
A) 测量转速根据EN60745-2-3标准
B) 在20–25摄氏度下带18伏8.0安培小时的充电电池ProCORE测得,并与充电电池的充电量以及设备的工作温度有关
C) 视所使用的充电电池而定
D) 温度<0 摄氏度时功率受限
E) 移动终端设备必须可与
F) 根据外部条件包括所用接收设备的不同,覆盖范围会有很大差别。在封闭的室内以及由于金属障碍物(如墙壁、台架、