Global Machinery Company Grinder AG230M User Manual

2400W  
MAGNESIUM  
230MM (9”)  
ANGLE GRINDER  
AG230M  
INSTRUCTION MANUAL  
Code: AG230M  
Date: 060412  
Black  
Cyan  
Magenta  
Yellow  
Edition: 05  
Op: DCR  
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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  
2400W  
Input power:  
No load speed:  
Insulation class:  
Disc diameter:  
Spindle:  
6000 min-1  
Double insulated  
230mm (9”)  
M14  
Disc bore diameter:  
Net weight:  
22.2mm  
6kg  
Sound pressure level:  
94.5 dB(A)  
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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.  
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.  
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.  
Save these instructions  
1. Work area  
a. Keep work area clean and well lit. Cluttered and dark  
areas invite accidents.  
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.  
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. 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.  
c. Keep children and bystanders away while  
operating a power tool. Distractions can cause you to  
lose control.  
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.  
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.  
e. Do not overreach. Keep proper footing and balance at  
all times. This enables better control of the power tool in  
unexpected situations.  
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.  
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.  
c. Do not expose power tools to rain or wet conditions.  
Water entering a power tool will increase the risk of  
electric shock.  
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.  
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.  
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.  
Additional safety rules for angle grinders  
Fully unwind cable drum extensions to avoid  
potential overheating.  
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.  
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.  
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.  
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.  
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.  
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.  
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.  
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.  
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.  
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.  
5. Service  
Never try to operate the angle grinder without the guard  
in place.  
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.  
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.  
Accessories  
The GMC AG230M 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  
Auxiliary handle  
Be careful not to damage the spindle or either of the disc  
flanges. Damage to these parts could result in  
disc breakage.  
230mm Metal grinding disc  
Instruction manual  
Do not press the spindle lock button whilst the  
spindle is turning.  
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.  
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  
6
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1. Motor housing  
9. Rotating handle  
10. Rotating handle release button  
11. Pin wrench  
Know your product  
2. Spindle lock button  
3. Disc guard  
Before using the angle grinder,  
familiarise yourself with all the  
operating features and safety  
requirements.  
4. Quick release guard lever  
12. Disc  
5: Mounting points for the  
multi-position auxiliary handle  
13. Outer flange  
Use the tool only for the applications  
intended. All other applications are  
expressly ruled out  
14. Outer flange washer –  
for flat discs  
6. On/off switch  
7. Lock-off catch  
15. Inner flange  
8. Multi-position auxiliary handle  
16. Brush-wear/overload  
LED indicator  
8
10  
10  
2
5
1
9
7
16  
6
Disc assembly showing flange requirements  
3
Flat disc  
Depressed disc  
12  
4
11  
15  
14  
13  
Spigot  
facing  
the disc  
Spigot  
facing away  
from disc  
7
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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  
Setting up  
Multi-position auxiliary handle  
D
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)  
A
2. Press the rotating handle  
release button (10) and turn  
the rotating handle (9) to suit  
the planned operation. (Fig. B)  
E
convenience and safety of  
operation.  
1. Open the quick release guard  
lever (4). (Fig. C)  
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.  
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)  
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.  
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.  
Disc guard  
WARNING. Switch off the  
C
The grinder will warn you when you are approaching  
overload by flashing the Yellow light.  
grinder and disconnect it from  
the power point.  
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.  
NOTE. Grinding operations  
normally require the angle  
grinder to be held with the  
grinding disc parallel to the plane  
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from the workpiece.  
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.  
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.  
By reducing the switch on surge it also helps prolong the life  
of the tool.  
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.  
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.  
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.  
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.  
3. Cutting and grinding discs become very hot when in use.  
Take care not to touch them until they have cooled down.  
2. Plug the cordset into the power socket.  
4. Hold the tool securely and make sure that you have full  
control at all times.  
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. During a cutting operation, maintain an angle of 30° to  
40° between the tool and the workpiece.  
F
G
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  
5. Allow the grinder to  
start and attain full speed before bringing the disc to the  
workpiece.  
H
I
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  
9
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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)  
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.  
2. Remove the outer flange (13) (Fig. J) and the used  
J
K
disc.(Fig. K)  
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.  
3. Clean the flanges (13 and 15) and check the new disc.  
4. Ensure that the non-threaded  
L
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.  
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)  
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.  
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.  
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.  
5. Fit the outer flange (13) with the raised centre section  
facing outwards as  
N
M
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.  
10  
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5. Fit the large outer flange (14) and ensure that the raised  
Disc Selection  
O
P
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.  
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.  
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.  
Q
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)  
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.  
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.  
11  
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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.  
12  
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13  
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14  
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15  
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