Global Machinery Company Grinder AG125MAG User Manual

1200W  
125MM (5”)  
ANGLE GRINDER  
AG125MAG  
INSTRUCTION MANUAL  
050922 ED4 JJ  
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Dear Customer  
Description of symbols  
The rating plate on your tool may show symbols. These  
represent important information about the product or instructions  
on its use.  
If you require any help with your product, whether it  
is a Warranty claim, spare part or user information, please  
phone our Help Line for an immediate response. Phone  
1300 880 001 inAustralia or 0800 445 721 in New Zealand.  
Wear hearing protection.  
Wear eye protection.  
Wear breathing protection.  
Introduction  
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.  
Double insulated for additional protection.  
Conforms to relevant standards for  
electromagnetic compatibility.  
You will find your new tool easy and safe to operate, and, with  
proper care, it will give you many years of dependable service.  
CAUTION. Carefully read through this entire Instruction  
Manual before using your new GMC Power Tool.  
Take special care to heed the Cautions and Warnings.  
Specifications  
Nominal voltage:  
230–240Vac ~ 50Hz  
1200W  
4000 - 10,500min-1  
Double insulated  
125mm  
Input power:  
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.  
Variable speed:  
Insulation class:  
Disc size:  
Spindle:  
M14  
Environmental protection  
Disc bore diameter:  
Sound pressure level:  
Weight:  
22.2mm  
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.  
95 dB(A)  
2.7kg  
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. Amoment 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.  
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.  
Save these instructions  
Work area  
Keep work area clean and well lit. Cluttered and dark areas  
invite accidents.  
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.  
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.  
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.  
Keep children and bystanders away while operating a  
power tool. Distractions can cause you to lose control.  
Electrical safety  
Do not overreach. Keep proper footing and balance at  
all times. This enables better control of the power tool in  
unexpected situations.  
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.  
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 refrigerators. 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.  
Power tool use and care  
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.  
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.  
4
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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.  
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.  
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.  
Service  
Use discs only of the prescribed diameter.  
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.  
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.  
5
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Always use the front 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 GMCAG125MAGAngle 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.  
125mm 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  
6
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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 ex
2
7
13  
1. On/off switch  
6
8
2. Power lock-on button  
3. Spindle lock button  
4. Disc guard  
5. Front handle  
3
6. Mounting points for  
the handle  
1
7. LED Overload  
protection system  
8. Motor housing  
9. Pin wrench  
10. Outer flange  
11. Disc  
14  
4
12. Inner flange  
5
13. Variable speed dial  
with soft start  
14. Quick release guard lever  
Disc assembly showing flange requirements  
Depressed disc (thicker than 4mm)  
Depressed disc (4mm or less in thickness)  
12  
12  
11  
11  
Raised inner  
part facing  
away from  
the disc  
Raised inner  
part facing  
the disc  
10  
9
10  
9
7
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Setting up  
Operation  
Multi-position front 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  
Screw the front handle (5) into the  
most suitable mounting port (6)  
(left side or right side) to suit the  
application. Ensure that the handle  
is fully screwed in place and firm.  
attempt to grind wood or a soft  
metal such as lead. The material  
will quickly “fill” the disc and render  
it useless.  
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 slimline 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 (4) 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 depressing the on/off trigger switch (1).  
Release the trigger to stop the tool.  
3. If you press the lock on button  
(2) while the trigger switch is  
depressed, the switch is kept in  
the operating position. To release  
the lock on button, press and  
release the trigger switch.  
1. Open the quick release guard lever (14).  
4. 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  
pressure can cause dangerous  
disc fracture or damage to  
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.  
3. Twist the guard to the  
appropriate position for either  
grinding or cutting.  
the tool. Hold the grinder at  
approximately 15° to 30º to the  
work and move slowly.  
4. Lock the guard in position with  
the quick release guard lever.  
8
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5. Once the grinding or cutting  
is finished, pull in and release  
the on/off switch (1) to stop the  
grinder.  
2. Use your finger or thumb to turn  
the dial forwards to increase  
the speed and backwards to  
decrease it.  
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.  
3. Position “1” denotes the lowest  
speed. Position “6” denotes the  
highest speed.  
30º  
15º  
NOTE. Using the correct speed for  
the job increases the life of 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.  
Variable 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  
to the selected speed. The soft start feature eliminates any “kick”  
when the grinder is switched on. In conventional grinders without  
soft start the switch is heated up instantly thus reducing the life  
expectancy. The soft start feature ensures a longer life for the  
tool.  
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.  
1. The LED Overload protection system will alert you when it is  
overloading.  
Replacing a disc  
CAUTION. Switch off the grinder and disconnect it from the  
power point.  
2. The grinder will warn you when  
you are approaching overload by  
flashing the Yellow light  
1. Turn the angle grinder on to its back and press the spindle  
lock button (3) and rotate the spindle until it locks.  
3. 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.  
4. When this occurs, wait a brief moment then restart the  
grinder, however, take additional care not to press on the tool  
too much.  
Variable speed  
The variable speed feature of this grinder enhances the grinding  
performance and saves the disc from undue wear.  
2. Insert the pins of the wrench (9) into the holes in the outer  
flange (10) and remove it and the old disc.  
NOTE. Do not remove the inner flange (12).  
1. The variable speed dial (13) is used to program the speed of  
the disc. The speed should be adapted to the material being  
grinded.  
9
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WARNING. Do not use a disc marked with a lower RPM than  
that of the Max no load speed shown on the rating plate.  
CAUTION. Do not use excessive force to clamp the disc. It could  
crack it and cause failure during use.  
3. Clean the flanges and check the new 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.  
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.  
Lubrication  
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.  
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.  
NOTE. Depending on whether the disc has a flat inner section or  
a depressed inner section, proceed as follows.  
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.  
6. For discs with a flat inner section,  
screw on the outer flange (10)  
with the protruding spigot section  
facing away from the disc.  
Cleaning  
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. 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.  
8. Hand tighten the outer flange until  
the disc is secure.  
CAUTION. Do not use cleaning agents to clean the plastic parts  
of the tool. Amild detergent on a damp cloth is recommended.  
Water must never come into contact with the tool.  
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 secured  
and that it rotates fully and does  
not wobble unduly.  
General inspection  
Regularly check that all the fixing screws are tight, particularly the  
outer flange. They may vibrate loose over time.  
11. Run the angle grinder  
under 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.  
10  
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11  
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Carefully read the entire Instruction Manual  
before using this product.  
Before returning this product for a Warranty Claim or any other reason  
Please Call 1300 880 001 (Australia) or 0800 445 721 (New Zealand)  
When you make your call, please have the following information at hand:  
GMC Product Type GMC Product Code  
A GMC Service Engineer will take your call and, in most cases, will be able to  
solve your problem over the phone.  
You are welcome to use this phone-in service to make suggestions or give  
comments about any GMC product.  
With continuing product development changes may have occurred which render  
the product received slightly different to that shown in this instruction manual.  
The manufacturer reserves the right to change specifications without notice.  
Note: Specifications may differ from country to country.  
Helpline 1300 880 001 (Australia) or 0800 445 721 (New Zealand)  
The GMC 777 Helpline operates from 7am to 7pm, 7 days a week (EST). This allows you to contact  
GMC directly with any queries and technical questions you have regarding products.  
Save this Manual for future reference  
GMC Head Office:  
45-55 South Centre Road, Melbourne Airport, Victoria, Australia 3045  
Telephone (03) 8346 1100 Fax (03) 8346 1200  
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