950W
100MM (4”)
ANGLE GRINDER
MX100MAG
INSTRUCTION MANUAL
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Introduction
Description of symbols
The rating plate on your tool may show symbols.
These represent important information about the
product or instructions on its use.
Your new GMC power tool will more than satisfy
your expectations. It has been manufactured under
stringent GMC Quality Standards to meet superior
performance criteria.
Wear hearing protection.
Wear eye protection.
Wear breathing protection.
You will find your new tool easy and safe to operate,
and, with proper care, it will give you many years
of dependable service.
Double insulated for additional protection.
CAUTION. Carefully read through this entire Instruction
Manual before using your new GMC Power Tool. Take
special care to heed the Cautions and Warnings.
Conforms to relevant standards for
electromagnetic compatibility.
Your GMC power tool has many features that will make
your job faster and easier. Safety, performance, and
dependability have been given top priority in the
development of this tool, making it easy to maintain
and operate.
Specifications
Nominal voltage:
230–240Vac ~ 50Hz
Input power:
950W
Max no load speed:
Insulation class:
Disc size:
11000min-1
Double insulated
100 mm (4”)
M10
Environmental protection
Recycle unwanted materials instead
of disposing of them as waste. All tools,
hoses and packaging should be sorted,
taken to the local recycling centre and
disposed of in an environmentally safe way.
Spindle:
Disc bore diameter:
Sound pressure level:
Weight:
16 mm
91.6 dB(A)
2 kg
3
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Personal safety
Safety instructions
• 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.
WARNING. Read and understand 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 below refers to your mains-operated (corded) power
tool or battery-operated (cordless) power tool.
Save these instructions
Work area
• Use safety equipment. Always wear eye protection.
Safety equipment such as a dust mask, non-skid
safety shoes, hard hat, or hearing protection used for
appropriate conditions will reduce personal injuries.
• Keep work area clean and well lit. Cluttered and 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.
• 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.
• Keep children and bystanders away while operating a
power tool. Distractions can cause you to lose control.
• Remove any adjusting key or wrench before turning
the tool on. A wrench or a key that is left attached to a
rotating part of the power tool may result in personal injury.
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.
• 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.
• Avoid body contact with earthed or grounded
surfaces such as pipes, radiators, ranges and refrig-
erators. There is an increased risk of electric shock if
your body is earthed or grounded.
• If devices are provided for the connection of dust
extraction and collection facilities ensure that these
are connected and properly used. Use of these
devices can reduce dust-related hazards.
• 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.
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.
• When operating a power tool outdoors, use an
outdoor extension cord suitable for outdoor use.
Use of a cord suitable for outdoor use reduces the risk
of electric shock.
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• 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.
Additional safety rules for angle grinders
• Fully unwind cable drum extensions to avoid potential
overheating.
• 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.
• 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.
• 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.
• 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.
• 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.
• 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.
• Keep cutting tools sharp and clean. Properly
maintained cutting tools with sharp cutting edges are
less likely to bind and are easier to control.
• 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.
• 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 intended could result in a
hazardous situation.
• 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.
Service
• Have your power tool serviced by a qualified repair
personnel using only identical replacement parts.
This will ensure that the safety of the power tool is
maintained.
• 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.
5
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• Always use the side 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.
Contents of carton
The GMC MX100MAG Angle Grinder is supplied with the
following accessories as standard:
• Make sure that the disc is not in contact with the work
when you start the grinder.
• Pin wrench
• Side handle
• Be careful not to damage the spindle or either of the disc
flanges. Damage to these parts could result in disc breakage.
• 100mm metal cutting disc
• Instruction manual
• Do not press the spindle lock button whilst the spindle is
turning.
Unpacking
• 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.
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.
• 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
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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 and accessories only for the applications
intended. All other applications are expressly ruled out.
1
1. Motor housing
2. Spindle lock button
3. Disc guard
2
4
5
4. Mounting points for the s
5. On/off switch
6. Side handle
7. Pin wrench
8. Outer flange
9. Disc
10. Inner flange
11. Quick release guard lever
9
11
6
3
Disc assembly showing flange requirements
Depressed disc (thicker than 4 mm)
Depressed disc (4 mm or less in thickness)
10
9
10
9
Raised inner
part facing
away from
the disc
Raised inner
part facing
the disc
8
7
8
7
7
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Setting up
Operation
Multi-position side handle
This angle grinder can be used for grinding and cutting
steel, stone or ceramic workpieces such as pipe, box
section, rectangular, 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.
Screw the side handle (6) into the
most suitable mounting port (4)
(left side or right side) to suit the
application. Ensure that the handle
is fully screwed in place and firm.
Disc guard
WARNING. Switch off the grinder and disconnect it from
the power point.
Before starting the grinder first
ensure that the disc, disc guard
and tool are in good condition.
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 main
handle positions to suit the task on hand. It can make a
considerable difference to the levels of convenience and
safety of operation.
Position the guard (3) as described in the disc guard section
so that it will deflect hot sparks away from the operator.
Switching on and off
1. Plug the power cord into the power point.
2. Start the tool by pushing
the on/off trigger switch (5)
forward up and over the
latching ramp to lock the
switch on.
1. Open the quick release guard lever (11).
3. Hold the grinder firmly while
it is switched on and only
apply gentle pressure to the
workpiece. Little more than the
weight of the tool should be
applied to give the best and
most efficient material removal.
Forcing and excessive
2. Position the lug on the inside of the central guard ring in
the vertical slot in the spindle cover and press the guard
onto the spindle cover.
pressure can cause dangerous
disc fracture or damage to
the tool. Hold the grinder at
30º
15º
3. Twist the guard to the appropriate position for either
grinding or cutting.
approximately 15° to 30º to the
work and move slowly.
4. Lock the guard in position with the quick release
guard lever.
4. Once the grinding or cutting is finished, push the back
section of the on/off switch (5) to stop the grinder.
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WARNING. Avoid flying sparks and ensure they do not hit
any inflammable materials, as they are very hot and could
cause personal injury or a fire.
NOTE. Depending on whether the disc has a flat inner
section or a depressed inner section, proceed as follows.
6. For discs with a flat inner
section, screw on the outer
flange (8) with the protruding
spigot section facing away
from the disc.
WARNING. The disc continues to turn for a few seconds
even though the switch is turned off. Keep your hands well
away from the moving disc.
Replacing a disc
CAUTION. Switch off the grinder and disconnect it from
the power point.
7. For discs with a depressed
inner section, screw on
the outer flange with the
protruding spigot section
facing the disc so that it
locates in the hole in the disc.
1. Turn the angle grinder on to its back and press the
spindle lock button (2) and rotate the spindle until it locks.
8. Hand tighten the outer flange
until the disc is secure.
9. Press the spindle lock button
and tighten the flange with the
wrench.
10. Turn the new disc by hand,
ensuring that it is tightly
2. Insert the pins of the wrench (7) into the holes in the
outer flange (8) and remove it and the old disc.
secured and that it rotates fully
and does not wobble unduly.
NOTE. Do not remove the inner flange (10).
11. Run the angle grinder under
no load for at least one
WARNING. Do not use a disc marked with a lower RPM than
that of the Max no load speed shown on the rating plate.
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.
3. Clean the flanges and check the new disc.
4. Holding the angle grinder with the spindle facing
upwards, check that the inner flange is on the spindle
and correctly located. The two machined flat sections
must face the angle grinder and locate in the appropriate
position on the spindle.
CAUTION. Do not use excessive force to clamp the disc.
It could crack it and cause failure during use.
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.
5. Place the disc onto the spindle
with the label facing the angle
grinder. The hole in the disc
should locate onto the spindle
and fit firmly into the spigot
section of the inner flange.
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Lubrication
The grease in the gearbox will require replacement after
extensive use of the tool. Please go to a qualified service
agent to perform this service.
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, particularly
the outer flange. They may vibrate loose over time.
10
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11
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GMC customer assist
If your product needs repairing, replacing,
technical service or you simply need help or advice,
please contact us on our Customer Assist Line
1300 880 001 (Australia) or 0800 445 721 (New Zealand).
For prompt service we suggest you log your service request
access to the Internet, please contact our service department
on 1300 880 001 (Australia) or 0800 445 721 (New Zealand).
7am –7pm, 7days a week (AEST).
Please note that if repair or replacement is required,
you must provide a valid original purchase receipt.
You will need the following details at hand to log your service request;
Personal details: First & Last name, address, pick up address,
contact phone numbers, email address
Product details: Product number, date of purchase, retailer bought from,
State & postcode, receipt number, reason for the request,
copy of official purchase receipt
Attach your purchase receipt and save with this Manual for future reference.
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