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Black
Cyan
Magenta
Yellow
Code: AG230M
Date:
060412 Edition: 05 Op: DCR
2400W
MAGNESIUM
230MM (9”)
ANGLE GRINDER
AG230M
INSTRUCTION MANUAL
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Contents
Warranty 2
Introduction 3
Environmental protection 3
Description of symbols 3
Specifications 3
General safety rules 4
Additional safety rules for angle grinders 5
Accessories 6
Unpacking 6
Know your product 7
Setting up 8
Disc guard 8
Operation 8
Holding and guiding the tool 9
Replacing a disc 9
Disc Selection 11
LED brush-wear indicator 11
Lubrication 11
Power cord maintenance 12
Cleaning 12
General inspection 12
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Description of symbols
The rating plate on your tool may show symbols.
These represent important information about the
product or instructions on its use.
Wear hearing protection.
Wear eye protection.
Wear breathing protection.
Double insulated for additional protection.
Conforms to relevant standards
for electromagnetic compatibility.
Specifications
Nominal voltage: 230–240V ~ 50 Hz
Input power: 2400W
No load speed: 6000 min
-1
Insulation class: Double insulated
Disc diameter: 230mm (9”)
Spindle: M14
Disc bore diameter: 22.2mm
Net weight: 6kg
Sound pressure level: 94.5 dB(A)
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General safety rules
WARNING. Read all instructions. Failure to follow all
instructions listed below may result in electric shock,
fire and/or serious injury. The term “power tool” in all of
the warnings listed below refers to your mains operated
(corded) power tool or battery operated (cordless)
power tool.
Save these instructions
1. Work area
a. Keep work area clean and well lit.
Cluttered and 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 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, 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. 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.
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 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
have the switch on invites accidents.
d. 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.
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
extraction and collection facilities, ensure these are
connected and properly used.
Use of these devices
can reduce dust related hazards.
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 at the rate for which it was designed.
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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 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 are dangerous 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. Many 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 a
hazardous situation.
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.
Additional safety rules for angle grinders
• Fully unwind cable drum extensions to avoid
potential overheating.
• When an extension cable is required, you must ensure
that it has the right ampere rating for your power tool and
is in safe electrical condition.
• Always switch off before you put the angle grinder down.
• Do not let anyone under 18 years operate this tool.
• Rags, cloths, cord, string and the like should never be left
around the work area.
• If you are interrupted when operating the tool, complete
the process and switch off before looking up.
• Periodically check that all nuts, bolts and other fixings are
properly tightened.
• Check the disc before mounting it into the angle
grinder. Check by striking it with a wooden handle whilst
balancing the disc on your finger. Listen for the ring and
do not use if dull, as the disc may be cracked.
• When the disc is installed, run it for at least one minute to
ensure that it does not have a fault. It is always advisable
to stay out of the line of the disc when testing or when
using the tool.
• Do not use a disc marked with a lower RPM than that of
the no load speed shown on the rating plate.
• Use discs only of the prescribed diameter.
• Do not use the angle grinder for buffing or polishing under
any circumstances.
• Never try to operate the angle grinder without the guard
in place.
• Do not secure the angle grinder in a vice or work bench
and use it as a static grinder. It can lead to serious injury.
• Never apply excessive pressure to the disc. It might
shatter causing personal injury.
• Ensure the work piece to be ground or cut, is held tight in
the vice or other clamping system.
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• Always use the auxiliary handle and ensure a good grip
on the grinder housing with one hand and the handle with
the other hand before proceeding with any work.
• Make sure that the disc is not in contact with the work
when you start the grinder.
• Be careful not to damage the spindle or either of the disc
flanges. Damage to these parts could result in
disc breakage.
• Do not press the spindle lock button whilst the
spindle is turning.
• Only use good quality grinding and cut off discs. Cheap
poor quality discs tend to glaze up which loads the
motor and can damage it. Use discs for their designated
purpose only. For instance, do not use cutting discs for
grinding or metal wheels on masonry.
• Watch out for flying sparks. Hold the tool at an angle of
approximately 15º to 30º to the work piece surface.
• Let the disc do the grinding or cutting at a reasonable
feed, as overloading will occur if too much pressure is
applied and the disc slows resulting in inefficient cutting
and possible damage to the motor.
• When using the grinder, use safety equipment including
safety goggles or shield, ear protection, dust mask and
protective clothing including safety gloves.
ALWAYS WEAR EYE PROTECTION
Wear goggles
Wear hearing protection
Wear a breathing mask
Accessories
The GMC AG230M Angle Grinder is supplied with the
following accessories as standard:
• Pin wrench
• Auxiliary handle
• 230mm Metal grinding disc
• Instruction manual
Unpacking
Due to modern mass production techniques, it is unlikely
that your GMC Power Tool is faulty or that a part is missing.
If you find anything wrong, do not operate the tool until the
parts have been replaced or the fault has been rectified.
Failure to do so could result in serious personal injury.
.
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Know your product
Before using the angle grinder,
familiarise yourself with all the
operating features and safety
requirements.
Use the tool only for the applications
intended. All other applications are
expressly ruled out
1. Motor housing
2. Spindle lock button
3. Disc guard
4. Quick release guard lever
5: Mounting points for the
multi-position auxiliary handle
6. On/off switch
7. Lock-off catch
8. Multi-position auxiliary handle
9. Rotating handle
10. Rotating handle release button
11. Pin wrench
12. Disc
13. Outer flange
14. Outer flange washer –
for flat discs
15. Inner flange
16. Brush-wear/overload
LED indicator
2
1
5
3
4
9
10
12
8
13
14
15
11
Disc assembly showing flange requirements
Flat disc Depressed disc
Spigot
facing
the disc
Spigot
facing away
from disc
16
7
6
10
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B
Setting up
Multi-position auxiliary handle
1. Screw the multi-position
auxiliary handle (8) into the
most suitable mounting point
(5) (top, left side or right side)
to suit the planned operation.
(Fig. A)
2. Press the rotating handle
release button (10) and turn
the rotating handle (9) to suit
the planned operation. (Fig. B)
NOTE. The rear handle (9) can
be rotated to the left or right. It
must be “locked” into one of the
three preset positions: central,
90° to the left or 90° to the
right. It must not be used at any
position in between these three
preset positions as it might rotate
during use and create a hazard.
NOTE. Grinding operations normally require the angle
grinder to be held with the grinding disc at an angle of 20°
to 30° between the tool and the plane of the workpiece
whilst cutting operations normally require the angle grinder
to held with the cutting disc at right angles to the workpiece.
Take the time to find the best combination of auxiliary
handle and rotating handle positions to suit the task on
hand. It can make a considerable difference to the levels
of convenience and safety of operation.
Disc guard
WARNING. Switch off the
grinder and disconnect it from
the power point.
NOTE. Grinding operations
normally require the angle
grinder to be held with the
grinding disc parallel to the plane
of the workpiece whilst cutting
operations normally require the
angle grinder to be held with
the cutting disc at right angles
to the workpiece. Take the time
to find the best combination of
front handle and slimline handle
positions to suit the task on hand.
It can make a considerable
difference to the levels of
convenience and safety of
operation.
1. Open the quick release guard
lever (4). (Fig. C)
2. Position the two lugs on the
inside of the central guard
ring in the vertical slot in the
spindle cover and press the
guard onto the spindle cover. (Fig. D)
3. Twist the guard to the appropriate position for either
grinding or cutting. (Fig. E)
4. Lock the guard in position with the quick release guard
lever. (Fig. C)
Operation
LED Overload protection system
Overloading the tool means the tool is being leaned on
excessively during use, slowing down the speed of the tool.
As a result of the motor slowing down, the internal fan does
not work to its full capacity.
The LED Overload protection system (16) will alert you
when it is overloading.
The grinder will warn you when you are approaching
overload by flashing the Yellow light.
If you continue to ignore the yellow light or do not see it,
the red light will come on and the grinder will immediately
come to a stop. When this occurs, wait a brief moment
then restart the grinder, however, take additional care not to
press on the tool too much.
A
C
D
E
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Single speed with soft start
This grinder is fitted with soft start technology. This feature
operates when you start the tool by slowly increasing the
power, significantly reducing any “kick” when the grinder is
switched on reducing the strain on the user.
By reducing the switch on surge it also helps prolong the life
of the tool.
Switching on and off
This angle grinder can be used for grinding and cutting
steel, stone or ceramic workpieces such as pipe, box
sections, angle iron, steel bar, house bricks and tiles. Do
not attempt to grind wood or a soft metal such as lead. The
material will quickly “fill” the disc and render it useless.
1. Before starting the grinder, put on safety glasses and
check to make sure that the disc, guard and the tool are
in good condition and correctly fitted.
2. Plug the cordset into the power socket.
3. Hold the tool firmly in anticipation of the start up torque.
4. Push the lock-off catch (7) forward (Fig. F) and pull on
the on/off switch (6). (Fig. G)
5. Allow the grinder to
start and attain full speed before bringing the disc to the
workpiece.
6. To prevent a new grinding disc from digging into the
workpiece, first draw the grinder across the workpiece
towards the operator. Once the leading edge of the disc
is slightly worn down, grinding can be conducted in either
direction.
7. Once the grinding or cutting is finished, remove the disc
from the workpiece.
8. Release the on/off switch (6) to stop the grinder.
NOTE. The disc continues to turn for a few seconds even
though the switch is turned off. Keep hands well away from
the moving disc.
WARNING. Do not immerse the disc into any type of
lubricant including water. This angle grinder is designed as
a dry grinder/cutter. Failure to observe this warning could
result in a fatal shock.
Holding and guiding the tool
1. Always clamp the workpiece.
2. Do not overload the tool so that the disc slows down. Let
the tool do the work rather than applying pressure. The
weight of the tool alone provides sufficient pressure.
3. Cutting and grinding discs become very hot when in use.
Take care not to touch them until they have cooled down.
4. Hold the tool securely and make sure that you have full
control at all times.
5. During a cutting operation, maintain an angle of 30° to
40° between the tool and the workpiece.
6. During grinding, maintain an angle of 20° to 30° between
the tool and the workpiece.
Replacing a disc
CAUTION. Switch off the grinder and disconnect it from the
power point.
Depressed Disc
1. To remove the disc, press and hold the spindle lock
button (2) (Fig. H) and rotate the disc by hand until the
F
G
H I
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spindle lock engages and locks the spindle. Use the pin
wrench (11) to unscrew the outer flange (13). Note that
this flange unscrews anticlockwise. (Fig. I)
2. Remove the outer flange (13) (Fig. J) and the used
disc.(Fig. K)
3. Clean the flanges (13 and 15) and check the new disc.
4. Ensure that the non-threaded
inner flange (15) is on the
spindle and located correctly.
The two machined flat
sections on the inner flange
(15) must face the angle
grinder and locate in the
matching positions on the
spindle. (Fig. L)
Fit the new disc, ensuring that
the disc is correctly located on the inner flange.
NOTE. Make sure that you select the correct disc for the
planned application, i.e. fit a metal grinding disc for cutting
metal, a masonry grinding disc for grinding masonry, a
cutting disc for cutting, etc.
5. Fit the outer flange (13) with the raised centre section
facing outwards as
shown in the picture below.
(Figs. M and N)
IMPORTANT. The depressed centre disc must be correctly
located on the inner flange. Refer to the assembly drawing
below.
6. Turn the new disc by hand, ensuring that it is tight in
the flanges and that it rotates fully and does not wobble
unduly.
7. Run the angle grinder no load for at least one minute
to ensure the new disc is in good condition. Make sure
you are wearing all the safety gear and that you face the
grinder away from you.
Flat Disc
1. To remove the disc, press and hold the spindle lock
button (2) and rotate the disc by hand until the spindle
lock engages and locks the spindle. Use the pin wrench
(11) to unscrew the outer flange (13). Note that this flange
unscrews anticlockwise.
2. Remove the outer flange (13) and the used disc.
3. Clean the flanges (13 and 15) and check the new disc.
4. Ensure that the non-threaded inner flange (15) is on
the spindle and located correctly. The two machined
flat sections on the inner flange (15) must face the
angle grinder and locate in the matching positions on
the spindle. Fit the new disc, ensuring that the disc is
correctly located on the inner flange.
NOTE. Make sure that you select the correct disc for the
planned application, i.e. fit a metal grinding disc for cutting
metal, a masonry grinding disc for grinding masonry, a
cutting disc for cutting, etc.
J K
L
N
M
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5. Fit the large outer flange (14) and ensure that the raised
portion is pressing against the disc. (Fig. O) Then fit
the outer flange (13) making sure that the raised centre
section is pointing towards the disc. (Fig. P)
IMPORTANT. The raised centre portion of the flange nut
MUST BE correctly positioned as it locates the grinder/
cutting wheel. Refer to the assembly drawing below.
6. Turn the new disc by hand, ensuring that it is tight
in the flanges and that it rotates fully and does not
wobble unduly.
7. Run the angle grinder no load for at least one minute
to ensure the new disc is in good condition. Make sure
you are wearing all the safety gear and that you face the
grinder away from you.
Disc Selection
Grinding Discs – 230mm x 22.2mm bore x 6mm.
Generally used on steel and high grade steel, also available
for stone, concrete and aerated concrete.
Cutting Discs – 230mm x 22.2mm bore x 3mm.
Generally used on steel, high grade steel and stainless steel
also available for stone, concrete and aerated concrete.
Diamond Blade Disc – 230mm x 22.2mm bore x 2.2mm.
These types of discs are generally used in masonry cutting
applications. The are suited for cutting concrete, tiles,
marble, granite and sand stone.
LED brush-wear indicator
The LED Brush-wear indicator (16) provides early warning
that the carbon brushes within the tool require replacement.
When the carbon brushes are worn down, it will result in
a current drop creating inefficient motor power which can
result in costly repair.
The LED Brush-wear indicator
warns the user when a green
light appears on the LED display.
The carbon brushes must be
replaced soon. When the carbon
brushes are replaced, the next
time the tool is used the green
light will not appear. (Fig. Q)
CAUTION. The carbon brushes should be replaced by a
qualified technician at an authorised service centre.
Lubrication
The grease in the gearbox will require replacement after
extensive use of the tool. Please refer to an authorised
service agent to provide this service.
O P
Q
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Power cord maintenance
If the supply cord needs replacing, the task must be carried
out by the manufacturer, the manufacturer’s agent, or an
authorised service centre in order to avoid a safety hazard.
Cleaning
1. Keep the tool’s air vents unclogged and clean at all times.
2. Remove dust and dirt regularly. Cleaning is best done
with a rag. Wear safety goggles or an eye shield and
gloves whist cleaning.
3. Re-lubricate all moving parts at regular intervals.
4. Never use caustic agents to clean plastic parts.
CAUTION. Do not use cleaning agents to clean the
plastic parts of the tool. A mild detergent on a damp cloth
is recommended. Water must never come into contact
with the tool.
General inspection
Regularly check that all the fixing screws are tight. They
may vibrate loose over time.
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