BOSCH GPO 14 CE Professional 240V Electric Polisher Instruction Manual

: June 5, 2024
: Bosch

GPO 14 CE Professional 240V Electric Polisher

Robert Bosch Power Tools GmbH
70538 Stuttgart
GERMANY
www.bosch-pt.com
1 609 92A 6KA (2021.07) O / 216

ginder

Manual original

Safety Instructions

General Power Tool Safety Warnings
WARNING Read all safety warnings and all instructions.
Failure to follow the 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

▶ Keep work area clean and well lit. Cluttered or dark areas invite accidents.
▶ 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.
▶ Keep children and bystanders away while operating a power tool. Distractions can cause you to lose control.

Electrical safety

▶ 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.
▶ Avoid body contact with earthed or grounded surfaces, such as pipes, radiators, ranges and refrigerators. There is an increased risk of electric shock if your body is earthed or grounded.
▶ Do not expose power tools to rain or wet conditions. Water entering a power tool will increase the risk of electric shock.
▶ 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. Damaged or entangled cords increase the risk of electric shock.
▶ 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..
▶ If operating a power tool in a damp location is unavoidable, use a residual current device (RCD) protected supply. Use of an RCD reduces the risk of electric shock.

Personal safety

▶ 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.
▶ 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.
▶ 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 energizing power tools that have the switch on invites accidents.
▶ 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.
▶ Do not overreach. Keep proper footing and balance at
all times. This enables better control of the power tool in
unexpected situations.
▶ 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.
▶ If devices are provided for the connection of dust extraction
and collection facilities, ensure these are connected
and properly used. Use of dust collection can reduce
dust-related hazards.

Power tool use and care

▶ 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.
▶ 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.
▶ 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.
▶ 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.
▶ Maintain power tools. Check for misalignment or binding
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.
▶ Keep cutting tools sharp and clean. Properly maintained
cutting tools with sharp cutting edges are less
likely to bind and are easier to control.
▶ 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 performed.
Use of the power tool for operations different
from those intended could result in a hazardous situation.

Service

▶ 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 Instructions for Polisher
Safety Warnings common for Sanding, Wire Brushing or
Polishing

▶ This power tool is intended to function as a sander,
wire brush or polisher. 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.
▶ Operations such as grinding or cutting-off 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.
▶ Do not use accessories which are not specifically designed
and recommended by the tool manufacturer.
Just because the accessory can be attached to your
power tool, it does not assure safe operation.
▶ 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.
▶ The outside diameter and the thickness of your accessory
must be within the capacity rating of your
power tool. Incorrectly sized accessories cannot be adequately
guarded or controlled.
▶ 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.
▶ Do not use a damaged accessory. Before each use inspect
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.
▶ 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.
▶ 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 immediate area of operation.
▶ Hold the power tool by insulated gripping surfaces
only, when performing an operation where the cutting
accessory may contact hidden wiring or its own cord.
Cutting accessory contacting a “live” wire may make exposed
metal parts of the power tool “live” and could give
the operator an electric shock.
▶ Position the cord clear of the spinning accessory. If
you lose control, the cord may be cut or snagged and your
hand or arm may be pulled into the spinning accessory.
▶ 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.
▶ 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.
▶ 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.
▶ Do not operate the power tool near flammable materials.
Sparks could ignite these materials.
▶ Do not use accessories that require liquid coolants.
Using water or other liquid coolants may result in electrocution
or shock.

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 accessory
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.
▶ 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 reactions
or kickback forces, if proper precautions are taken.
▶ Never place your hand near the rotating accessory.
Accessory may kickback over your hand.
▶ 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.
▶ 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.
▶ 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 Sanding operations
▶ Do not use excessively oversized sanding disc paper.
Follow manufacturers recommendations, when selecting
sanding paper. Larger sanding paper extending beyond
the sanding pad presents a laceration hazard and
may cause snagging, tearing of the disc, or kickback.

Safety Warnings specific for Polishing operations

▶ Do not allow any loose portion of the polishing bonnet
or its attachment strings to spin freely. Tuck away or
trim any loose attachment strings. Loose and spinning
attachment strings can entangle your fingers or snag on
the workpiece.

Safety Warnings specific for Wire Brushing operations

▶ 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.
▶ If the use of a guard is recommended for wire brushing,
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.

Additional safety information

Wear safety goggles.

▶ 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
explosion. Penetrating a water line causes property damage
or may cause an electric shock.
▶ Release the On/Off switch and set it to the off position
when the power supply is interrupted, e. g., in case of
a power failure or when the mains plug is pulled. This
prevents uncontrolled restarting.
Products sold in GB only:
Your product is fitted with an BS 1363/A approved electric
plug with internal fuse (ASTA approved to BS 1362).
If the plug is not suitable for your socket outlets, it should be
cut off and an appropriate plug fitted in its place by an authorized
customer service agent. The replacement plug
should have the same fuse rating as the original plug.
shock hazard and should never be inserted into a mains
socket elsewhere.
▶ Secure the workpiece. A workpiece clamped with
clamping devices or in a vice is held more secure than by
hand.

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 polishing and brushing metal
and coated surfaces as well as for polishing stone without
the use of water.

Product Features

The numbering of the product features refers to the diagram
of the power tool on the graphics page.
(1) Fastening screw for bow handle
(2) Bow handle (insulated gripping surface)
(3) Spindle lock button
(4) Speed preselection thumbwheel
(5) On/off switch
(6) Grinding spindle
(7) Auxiliary handle (insulated gripping surface)a)
(8) Clamping bolta)
(9) Clamping flangea)
(10) Buffing wheela)
(11) Clamping nuta)
(12) Spacer discsa)
(13) Polishing disca)
(14) Round nuta)
(15) Lambswool bonnet for polishing disca)
(16) Polishing spongea)
(17) Lambswool bonnet for polishing spongea)
(18) Rubber sanding pada)
(19) Sanding sheeta)
(20) Felt polishing disca)
(21) Cup brusha)
(22) Handle (insulated gripping surface)
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.

Technical Data

Polisher GPO 14 CE
Article number 3 601 C89 0..
Rated power input W 1400
Power output W 800
Rated speed min-1 3000
Speed adjustment range min-1 750–3000
Max. sanding pad diameter mm 180
Grinding spindle thread M 14
Max. spindle length mm 21
Weight according to EPTA-Procedure
01:2014
kg 2.5
Protection class / II

The specifications apply to a rated voltage [U] of 230 V. These specifications
may vary at different voltages and in country-specific models.
For a rated voltage [U] of 110 V, the rated power input is
1250 W.
Noise/Vibration Information
Noise emission values determined according to
EN 60745-2-3.
Typically the A-weighted noise level of the power tool are: 91
dB(A); sound power level 102 dB(A). Uncertainty K = 3 dB.
Wear hearing protection!
Vibration total values ah (triax vector sum) and uncertainty K
determined according to EN 60745-2-3:
Polishing:
ah = 6.0 m/s2, K = 1.5 m/s2
Disc sanding:
ah = 4.5 m/s2, K = 1.5 m/s2
The vibration level given in these instructions has been
measured in accordance with a standardised measuring procedure
and may be used to compare power tools. It can also
be used for a preliminary estimation of exposure to vibration.
The stated vibration level applies to the main applications of
the power tool. However, if the power tool is used for different
applications, with different application tools or poorly
maintained, the vibration level may differ. This can significantly
increase the exposure to vibration over the total working
period.
To estimate the exposure to vibration accurately, the times
when the tool is switched off or when it is running but not actually
being used should also be taken into account. This can
significantly reduce the exposure to vibration over the total
working period.
Implement additional safety measures to protect the operator
from the effects of vibration, such as servicing the
power tool and application tools, keeping the hands warm,
and organizing workflows correctly.

Fitting

Fitting Protective Equipment

▶ Pull the plug out of the socket before carrying out any
work on the power tool.
▶ Do not operate your power tool without the auxiliary
handle (7) or bow handle (2).
Side handle
Screw the side handle (7) on the left or right of the machine
head depending on how your are working.

Bow handle

Attach the bow handle (2) to the machine head as shown in
the figure.
Fitting the abrasive tools
▶ Pull the plug out of the socket before carrying out any
work on the power tool.
Clean the grinding spindle (6) and all parts to be mounted.
Lock the grinding spindle with the spindle lock button (3)
before clamping and releasing the abrasive tools.
▶ Do not press the spindle lock button while the grinding
spindle is moving. The power tool may become damaged
if you do this.
See the graphics page for fitting instructions.

Buffing wheel

Firmly screw the clamping bolt (8) onto the grinding
spindle (6) and tighten it with an open-ended spanner at the
spanner flat. Slide the clamping flange (9) and the buffing
wheel (10) onto the clamping bolt (8). Screw on the clamping
nut (11) and tighten it with the two-pin spanner.
Polishing disc
Slide the two spacer discs (12) and the polishing disc (13)
onto the grinding spindle (6). Screw on the round nut (14)
and tighten it with the two-pin spanner. Pull the lambswool
bonnet (15) over the polishing disc (13) and tighten the
fastening cords.

Polishing sponge

Firmly screw the polishing sponge (16) onto the grinding
spindle (6). The lambswool bonnet (17) can be pulled over
the polishing sponge (16).
Rubber sanding pad
Slide the rubber sanding pad (18) onto the grinding spindle
(6).
Screw on the round nut (14) and tighten with the two-pin
spanner.
Press the sanding sheet (19) firmly onto the underside of
the rubber sanding pad (18).
Felt polishing disc
Firmly screw the felt polishing disc (20) onto the grinding
spindle (6).

Cup brush/disc brush
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.
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 rotational/
circumferential speed on the label of the abrasive
tool.

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 materials
to be worked.
▶ Avoid dust accumulation at the workplace. Dust can
easily ignite.

Operation

Start-Up

▶ 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.
▶ Products that are only sold in AUS and NZ: Use a residual
current device (RCD) with a nominal residual current
of 30 mA or less.
When operating the power tool using a mobile generator that
does not have sufficient reserve capacity or an adequate
voltage control system with inrush current boost converter,
loss of performance or atypical behavior may occur upon
switch-on.
Please check the suitability of the power generator you are
using, particularly with regard to the mains voltage and frequency.

Switching on/off

To start the power tool, push the on/off switch (5) forward
and then press it down.
To lock the on/off switch (5) in position, push the on/off
switch (5) further forward.
To switch off the power tool, release the on/off switch (5);
or, if the switch is locked, briefly press the on/off switch (5)
and then release it.
▶ 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.

Speed preselection

You can preselect the required speed using the thumbwheel
for speed preselection (4), even during operation. The required
speed depends on the material and the working conditions;
it can be ascertained through practical tests.
Thumbwheel position No-load speed (min-1)
1 750
2 1200
3 1600
4 2000
5 2400
6 3000
▶ 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.

Constant Electronic control

The Constant Electronic keeps the speed at no load and under
load virtually consistent, guaranteeing uniform performance.
Working advice
▶ Pull the plug out of the socket before carrying out any
work on the power tool.
▶ Clamp the workpiece if it is not secure under its own
weight.
▶ Do not load the power tool so heavily that it comes to a
stop.
▶ 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.
▶ For sanding soft materials such as plaster or paint, it is
best to use a rubber sanding pad (18) with sanding
sheet (19). Cup brushes (21) and disc brushes are suitable
for removing rust.

Polishing

For polishing weathered lacquers and redressing scratches
(e.g. acrylic glass), the power tool can be fitted with an appropriate
polishing tool, e.g. lambswool bonnet, polishing
felt or polishing sponge (accessory).
Select a low speed for polishing (level 1–2) to prevent the
surface from overheating.
Apply the polish to an area slightly smaller than the area
which you intend to polish. Using the appropriate polishing
tool, work in the polish using side-to-side or circular motions
and applying moderate pressure.
Do not allow the polish to dry out on the surface; this may
damage the surface. Do not expose the surface which you intend
to polish to direct sunlight. Clean the polishing tools
regularly to ensure good polishing results. Wash the polishing
tools with mild detergent and warm water; do not use
thinning agents.

Maintenance and Service

Maintenance and Cleaning

▶ Pull the plug out of the socket before carrying out any
work on the power tool.
▶ To ensure safe and efficient operation, always keep
the power tool and the ventilation slots clean.
▶ In extreme conditions, always use a dust extractor if
possible. Blow out ventilation slots frequently and install
a residual current device (RCD) upstream. When
machining metals, conductive dust can settle inside the
power tool, which can affect its protective insulation.
Store and handle the accessories carefully.
In order to avoid safety hazards, if the power supply cord
needs to be replaced, this must be done by Bosch or by an
after-sales service centre that is authorised to repair Bosch
power tools.
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.
Great Britain
Robert Bosch Ltd. (B.S.C.)
P.O. Box 98
Broadwater Park
North Orbital Road
Denham Uxbridge