Global Machinery Company Saw COS355 User Manual

INSTRUCTION MANUAL  
355mm (14”)  
Cut Off Saw  
• Melbourne • Perth • Auckland • Hong Kong • Shanghai  
COS355  
040927 ED7 PR  
Taipei • New York • Verona • London • Paris  
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Symbols  
Dear Customer  
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 in Australia or 0800 445 721 in  
New Zealand.  
Wear hearing protection.  
Wear eye protection.  
Wear breathing protection.  
Introduction  
Conforms to relevant standards for  
electromagnetic compatibility.  
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.  
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.  
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  
Voltage:  
230–240Vac ~ 50Hz  
2200W  
3750min-1  
355mm  
120mm  
25.4mm  
100mm*  
90mm square*  
60 x 200mm*  
130mm*  
Input power:  
No load speed:  
Disc diameter:  
Flange diameter:  
Disc bore size:  
Pipe:  
Box Section:  
Rectangular Steel Tubing:  
Angle Iron:  
Solid Steel Bar:  
Insulation:  
* Cutting capacities are based on using a full size 355mm  
cutting disc that is not worn. As the disc wears the  
cutting capacity will reduce.  
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.  
35mm*  
Double insulated  
3
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7.Dress correctly. Do not wear loose clothing or jewellery.  
They can be caught in moving parts. Rubber gloves  
and non-slip footwear are recommended when working  
outdoors. If you have long hair, wear a protective hair  
covering.  
8.Use safety accessories. Safety glasses and earmuffs  
should always be worn. A face or dust mask is also  
required if the sanding operation creates dust.  
9.Do not abuse the power cord. Never pull the cord to  
disconnect the tool from the power point. Keep the cord  
away from heat, oil and sharp edges.  
10.Secure the work piece. Use clamps or a vice to hold  
the work piece. It is safer than using your hand and  
frees both hands to operate the tool.  
General safety instructions  
To use this tool properly, you must observe the safety  
regulations, the assembly instructions and the operating  
instructions to be found in this Manual. All persons who  
use and service the machine have to be acquainted with  
this Manual and must be informed about its potential  
hazards. Children and infirm people must not use this  
tool. Children should be supervised at all times if they  
are in the area in which the tool is being used. It is  
also imperative that you observe the accident prevention  
regulations in force in your area. The same applies for  
general rules of occupational health and safety.  
Warning. When using power tools, basic safety  
precautions should always be taken to reduce the risk of  
fire, electric shock and personal injury. Also, please read  
and heed the advice given in the additional important  
safety instructions.  
11.Do not overreach. Keep your footing secure and  
balanced at all times.  
12.Look after your tools. Keep tools sharp and clean for  
better and safer performance. Follow the instructions  
regarding lubrication and accessory changes. Inspect  
tool cords periodically and, if damaged, have them  
repaired by an authorised service facility. Inspect  
extension cords periodically and replace them if  
damaged. Keep tool handles dry, clean and free from  
oil and grease.  
13.Disconnect idle tools. Switch off the power and  
disconnect the plug from the power point before  
servicing, when changing accessories and when the  
tool is not in use.  
1.Keep the work area clean and tidy. Cluttered work  
areas and benches invite accidents and injury.  
2.Consider the environment in which you are working.  
Do not use power tools in damp or wet locations.  
Keep the work area well lit. Do not expose power tools  
to rain. Do not use power tools in the presence of  
flammable liquids or gases.  
3.Keep visitors away from the work area. All visitors  
and onlookers, especially children and infirm persons,  
should be kept well away from where you are working.  
Do not let others in the vicinity make contact with the  
tool or extension cord.  
14.Remove adjusting keys and wrenches. Check to see  
that keys and adjusting wrenches are removed from  
the tool before switching on.  
4.Store tools safely. When not in use, tools should be  
locked up out of reach.  
5.Do not force the tool. The tool will do the job better  
15.Avoid unintentional starting. Always check that the  
switch is in the OFF position before plugging in the  
tool to the power supply. Do not carry a plugged in  
tool with your finger on the switch.  
16.Use outdoor rated extension cords. When a tool  
is used outdoors, use only extension cords that are  
intended for outdoor use and are so marked.  
and safer working at the rate for which it was designed.  
6.Use the correct tool for the job. Do not force small  
tools or attachments to do the job best handled by a  
heavier duty tool. Never use a tool for a purpose for  
which it was not intended.  
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17. Stay alert. Watch what you are doing. Use common  
Additional safety rules for cut off saws  
WARNINGS.  
sense. Do not operate a power tool when you are tired.  
18.Check for damaged parts. Before using a tool,  
check that there are no damaged parts. If a part is  
slightly damaged, carefully determine if it will operate  
properly and perform its intended function. Check for  
alignment of moving parts, binding of moving parts,  
breakage of parts, proper mounting and any other  
conditions that may affect the operation of the tool.  
A part that is damaged should be properly repaired  
or replaced by an authorised service facility, unless  
otherwise indicated in this Instruction Manual.  
Defective switches must be replaced by an authorised  
service facility. Do not use a tool if the switch does  
not turn the tool on and off correctly.  
Always wear eye protection.  
Do not use cutting wheels, the maximum permissible  
speed of which is below the RPM value stated on the tool.  
Check the cut off disc before mounting it into the saw.  
Strike the disc with a wooden handle whilst balancing  
the disc on your finger. Listen for the ring. If the tone  
is dull, do not use the disc. It may be cracked.  
When the disc is installed, stand to one side, out of line  
with the disc, and run the tool for at least a minute to  
make sure that it is not faulty. Always stay out of line  
of the disc when using the saw.  
Do not use a cut off disc marked with a lower RPM than  
that of the no load speed shown on the rating plate of  
the tool.  
Check that the mains voltage matches that given on the  
rating plate before plugging in the tool.  
19.Guard against electric shock. Prevent body contact  
with grounded objects such as water pipes, radiators,  
cookers and refrigerator enclosures.  
20.Use only approved parts. When servicing, use only  
identical replacement parts. Use an authorised service  
facility to fit replacement parts.  
Ensure that the work piece is held tight in the vice.  
When cutting through long material, ensure that it is  
supported properly by packing up each end to match  
the height of the vice.  
Use only good quality cut off discs as poor quality discs  
tend to glaze up which can cause unnecessary load on  
the motor and resulting damage.  
Let the disc do the cutting at a reasonable feed. If too  
much pressure is applied the motor will be overloaded  
causing the disc to slow resulting in inefficient cutting  
and possible damage to the motor.  
When operating the cut off saw, use safety equipment  
including safety goggles or shield, ear protection, dust  
mask and protective clothing including safety gloves.  
WARNING. Before connecting a tool to a power source  
(mains switch power point receptacle, outlet, etc.) be sure  
that the voltage supply is the same as that specified on  
the nameplate of the tool. A power source with a voltage  
greater than that specified for the tool can result in  
serious injury to the user, as well as damage to the tool.  
5
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If in doubt, do not plug in the tool. Using a power source  
with a voltage less than the nameplate rating is harmful  
to the motor.  
Accessories  
The GMC COS355 chop saw is supplied with the following  
accessories as standard  
The tool must be used only for its prescribed purpose.  
Any use other than those mentioned in this Manual will  
be considered a case of misuse. The user and not the  
manufacturer shall be liable for any damage or injury  
resulting from such cases of misuse. The manufacturer  
shall not be liable for any changes made to the tool nor  
for any damage resulting from such changes.  
Even when the tool is used as prescribed it is not possible  
to eliminate all residual risk factors. The following hazards  
may arise in connection with the tool’s construction  
and design:  
1. 8mm Hex key  
2. 5mm Hex key  
3. 355mm Cut off disc (fitted)  
4. Rear spark shield  
5. Rubber feet (x4)  
6. Instruction manual  
7. Receipt holder  
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.  
Contact with the disc.  
Kickback of work piece and parts of work piece.  
Disc fracture.  
Catapulting of disc pieces.  
Damage to hearing if effective earmuffs are not worn.  
1.Remove all loose parts from the carton.  
2.Remove the packing materials from around the saw.  
Harmful emissions of grinding dust when the machine  
is used in closed rooms.  
3.Carefully lift the saw from the carton and place it on a  
level work surface.  
4.The saw has been shipped with the saw arm locked in  
the down position. To release the saw arm, push down  
on the top of the saw arm and rotate the lock down  
knob in a clockwise direction.  
Do not use discs that are deformed or cracked.  
Always remove the plug from the mains socket before  
making any adjustments or maintenance, including  
changing the disc.  
Assembly  
The GMC chop saw is packed, fully assembled except for  
the rear spark shield and rubber feet.  
6
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Know your product  
1.Trigger switch  
2.Lock-off button  
3.Disc guard  
1
18  
4.Front spark shield  
5.Spark shield locking knob  
6.Cut off disc  
7.Spindle lock  
8.Rear spark shield  
9.Base  
19  
2
3
4
16  
15  
10. Rubber foot  
11. Vice lock release lever  
12. Vice handle  
13. Vice  
5
6
14. Fence  
15. Carry handle  
16. Lock down knob  
17. Depth stop  
18. 8mm Hex key  
19. 5mm Hex key  
7
17  
8
9
14  
13  
11  
16  
12  
10  
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Overview  
Adjusting the vice  
The vice can be adjusted quickly by loosening the vice lock  
release lever and pushing forward.  
1.Place your workpiece in  
between the fence and vice.  
2.Lift the vice lock release lever  
and push the vice forward.  
The cut off saw is used for cutting steel such as pipe,  
box section, rectangular, angle iron and steel bars.  
The saw can cut at angles from 0° to 45° left and  
right, it features a two position fence that permits an  
extended cutting range. The quick release vice allows fast  
adjustment whilst the lock-off button prevents accidental  
operation.  
3.Once the vice hits the  
workpiece move the vice lock  
release lever back down.  
Attaching the rubber feet  
1. Tilt the saw onto its side.  
2. Take the rubber feet and  
insert 1 rubber foot into the  
matching slots on the base  
of the saw.  
3. Ensure the rubber feet are  
fully inserted into the slots.  
4.Rotate the vice handle in a  
clockwise direction to secure  
the workpiece in position.  
5. To remove an object from  
the vice, rotate the vice  
handle in an anti-clockwise  
direction until the vice jaws  
are loose. The work piece  
4. Repeat for the other side  
and place the chop saw back on its base.  
can now be removed, the  
vice lock release lever can  
Attaching the rear spark shield  
also be lifted to slide the vice back quickly.  
Note. The vice lock release lever cannot be lifted until the  
vice jaws are loose.  
1.Loosen and remove the hex bolt, flat washer and star  
washer at the back of the saw using the 5mm hex key  
supplied.  
Adjusting the cutting angle  
1.To change the cutting angle loosen the 2 hex screws  
securing the fence using the 8mm hex key supplied.  
2.Move the rear fence to the desired angle using the scale  
as a guide.  
2.Place the flat washer over the hex bolt and then fit  
the hex bolt through the spark deflector, place the star  
washer over the hex bolt so it is in between the spark  
deflector and the cut off saw. Place the spark shield in  
the correct position and tighten the hex bolt.  
3.Tighten the hex bolt to secure the spark shield in position.  
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3.Tighten the 2 hex bolts to secure the fence in position.  
CAUTION. Only perform miter cuts when the fence is set  
at the most forward position.  
Note. For accurate cuts, test the cutting angle on some  
similar scrap material and adjust the angle to suit your  
requirements. The scale is only a guide.  
4.When you release the trigger switch, the machine  
turns off and the lock-off button re-engages to prevent  
accidental operation.  
Warning. The cutting disc will continue to run down for a  
short period of time after the trigger swich has been released.  
Replacing a cut off disc  
Adjusting the fence  
1.The original spacing between the vice and the fence is  
175mm.  
2.When cutting wider materials the rear fence will need  
to be adjusted to the rear most position. When cutting  
narrow work pieces the fence should be positioned in  
the most forward position.  
CAUTION. Always ensure that the saw is switched off  
and unplugged from the power supply before installing or  
removing a disc.  
1.Loosen and remove the spark shield locking knob.  
2.Swing the front spark shield downwards and pull out  
from the upper disc guard to reveal the cutting disc bolt  
and flange.  
3.To adjust the fence loosen and remove the two hex bolts  
securing the fence using the 8mm hex key supplied.  
4.Move the fence backwards or forwards to one of the  
other two fixing positions.  
5. Tighten the 2 hex bolts to secure the fence in position.  
3.Push the spindle lock lever to the right and rotate the  
disc until the spindle lock engages.  
4.Whilst holding the spindle lock lever use the 8mm hex  
key supplied to remove the disc bolt. Note that the bolt  
unscrews in an anti-clockwise direction.  
5.Remove the disc lock bolt, washer, outer flange, blotter  
and cut off disc.  
CAUTION. Narrow work pieces may not be secured safely  
when using the two wider interval settings.  
Turning on and off  
1.Plug the cordset into the  
mains socket.  
2.Push the lock-off button and  
pull the trigger to start the tool.  
3.To stop the tool release the  
trigger switch  
9
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6.Clean any grinding dust from  
the inner flange and, after  
checking that it is in good  
condition, mount a new disc  
between two paper blotters.  
The rear blotter should be  
mounted onto the inner  
flange and the front blotter  
is the printed surface on the  
front of the disc.  
7.Replace the outer flange, washer and lock bolt. Tighten  
the bolt in a clockwise direction.  
8.Turn the new disc by hand, ensuring that it rotates fully  
and does not wobble unduly.  
FULLY upright position, there is only one threaded hole  
exposed. Replace the spark shield locking screw fully in this  
hole. Operate the spark guard up and down to ensure it is  
correctly located prior to turning the cut off saw on.  
Note. Ensure that the depth  
stop is adjusted to the correct  
height before commencing  
operation. The adjustable depth  
stop is threaded into the base  
of the machine at the rear. By  
raising and lowering the depth  
stop bolt with the 5mm hex  
key the travel of the cut off  
wheel can be controlled. This feature is particularly useful  
to prevent contact with the work bench surface when a  
new disc is fitted or increase disc travel as the abrasive  
disc wears. The depth stop should be checked and adjusted  
everytime a new disc is fitted.  
9. Replace the front spark shield by locating the centre  
pivot section of the spark shield into the raised centre  
section of the upper disc guard.  
Note. You need to locate the  
small tab of the spark guard on  
the inside of the wheel guard.  
You may need to push this into  
position over the head of the  
disc locking bolt. The two parts  
will only locate together when  
the spark guard is in the down  
position with approximately  
Operation  
1.Make all adjustments including  
setting the vice, fence position  
and fence angle.  
2.Ensure that the work piece is  
fully secured before starting  
any cutting.  
Note. Ensure you are wearing  
the appropriate safety gear  
including eye protection and hearing protection.  
3.Check that the disc, guard and tool are in good condition.  
4.Plug the cordset into the mains socket.  
5.Push the lock-off button and pull the trigger to start the  
tool.  
6.Bring the disc down onto the workpiece and allow it to  
cut its way through the workpiece without undue force.  
7.Once the cut is finished, raise the arm to clear the disc  
from the work piece, release the trigger and the cut off  
saw will stop. Please note that the disc will continue to  
80mm of the wheel at the bottom exposed. After locating  
centrally, lift the spark guard FULLY, ensuring the two parts  
rotate correctly and do not detach. With the guard in the  
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turn for a few revolutions even though the saw is switched  
off. Keep your hands well away from the moving disc.  
long length cut for the next section. The longer the  
length of cut, the more chance of the cutting disc  
glazing and motor overload.  
Note. As the disc wears the cutting capacity will decrease  
and the depth stop knob may need to be adjusted.  
Some helpful tips when using the chop saw  
Disc selection. The cutting disc must match the material  
to be cut. There are a wide variety of cutting discs  
and careful selection will assist in the correct and safe  
operation of the saw. For example, select a masonry  
cutting disc for bricks and tiles, a bar cutting disc for  
cutting solid metal section and a metal stud cutting disc  
for cutting steel sections. General purpose metal cutting  
discs are also available but where possible it is better to  
use the correct cutting disc for the task being performed.  
Maintenance  
WARNING. Always ensure that the tool is switched off and  
the plug is removed from the power point before making  
and adjustments or maintenance procedures.  
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.  
Abrasive cutting discs wear. The cutting discs wear so as  
to constantly expose to the material being cut clean and  
sharp cutting edges. This is normal for this type of cutter.  
Cleaning  
During the cutting operation apply a constant and even  
pressure to the cutting arm. The disc should be constantly  
cutting, and sufficient pressure needs to be applied to keep  
the cutting action going. If insufficient pressure is applied,  
the wheel has a tendency to clog, and the cutting edges  
of the disc become blunt and the cutting process reduces  
considerably. This is called glazing of the wheel and is due  
to the incorrect cutting disc for the material being cut, or  
the cutting rate being too slow.  
Do not overload the saw. The saw should run during  
the cutting operation at close to full speed. Too much  
pressure being applied to the tool will slow the motor  
and can cause motor failure.  
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 soft brush or a rag.  
3.Re-lubricate all moving parts at regular intervals.  
4.Never use caustic agents to clean plastic parts.  
5. Remove the metal that may have built up around the  
guard and spark deflector.  
CAUTION. Do not use cleaning agents to clean the plastic  
parts of the saw. A mild detergent on a damp cloth is  
recommended.  
General inspection  
Too much pressure being applied to the tool can also  
cause the cutting disc to cut on an angle. Ensure the  
beginning of the cut is a gradual start and apply the  
firm and constant pressure as the cut gets deeper.  
Regularly check that all the fixing screws are tight. They  
may vibrate loose over time.  
When cutting sections, always try and cut the sections  
so as the actual cutting length is as short as possible  
through the section. For example, angle iron has two  
sections to be cut. If the material is cut where both  
sections are cut at once, it is better for the cutting  
action than trying to cut on thin section and then a  
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Carefully read the entire Instruction Manual  
before using this 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  
Before returning this product for a  
Warranty Claim or any other reason  
Please Call 1300 880 001 (Australia)  
or 0800 445 721 (New Zealand)  
change specifications without notice. Note:  
Specifications may differ from country to country.  
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.  
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  
our products.  
You are welcome to use this phone-in service to  
make suggestions or give comments about any  
GMC product.  
45–55 South Centre Road  
Melbourne Airport  
Victoria, Australia 3045  
Tel: (03) 8346 1100 Fax: (03) 8346 1200  
Save this Manual for future reference.  
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