CORDLESS
DRILL
443T, 243T, 183T,
GTX12100K, GTX144100K
INSTRUCTION MANUAL
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Description of symbols
Introduction
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.
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.
Wear hearing protection.
Wear eye protection.
Wear breathing protection.
Double insulated
for additional protection.
Conforms to relevant standards for
electromagnetic compatibility.
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.
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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.
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. Battery tool use and care
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.
a. Ensure the switch is in the off position before
inserting battery pack. Inserting the battery pack into
power tools that have the switch on invites accidents.
b. Recharge only with the charger specified by the
manufacturer. A charger that is suitable for one type
of battery pack may create a risk of fire when used with
another battery pack.
c. Use power tools only with specifically designated
battery packs. Use of any other battery packs may
create a risk of injury and fire.
d. When battery pack is not in use, keep it away from
other metal objects like paper clips, coins, keys, nails,
screws, or other small metal objects that can make a
connection from one terminal to another. Shorting the
battery terminals together may cause burns or a fire.
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.
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. Under abusive conditions, liquid may be ejected from
the battery; avoid contact. If contact accidentally
occurs, flush with water. If liquid contacts eyes,
additionally seek medical help. Liquid ejected from the
battery may cause irritation or burns.
6. 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.
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
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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.
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.
Additional safety instructions for drills
Wear ear protectors with impact drills.
Exposure to noise can cause hearing loss.
Use auxiliary handles supplied with the tool.
Loss of control can cause personal injury.
• If possible, always use clamps or a vice to hold your work.
• Always switch off before you put the drill down.
• Ensure that the lighting is adequate.
Children and frail 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.
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:
• Damage to the lungs if an effective dust mask is not worn.
• Damage to hearing if effective ear defenders are not worn
• Do not put pressure on the drill, such that it slows the
motor down. Allow the drill bit to cut without pressure.
You will get better results and you will be taking better
care of your tool.
• Keep the area free of tripping hazards.
• Do not let anyone under 18 years operate this tool.
• Only use accessory bits in good condition.
• Before drilling, check that there is sufficient clearance
for the drill bit under the workpiece.
• Do not touch the bit after operation. It will be very hot.
• Keep your hands away from under the workpiece.
• Never use your hands to remove sawdust, chips or
waste close by the bit.
• Rags, cloths, cord, string and the like should never be
left around the work area.
• Support the work properly.
Additional safety instructions for the charger
• Before using the charger, read all the instructions and
cautionary markings on the charger and battery pack as
well as the instructions on using the battery pack.
• Only charge your batteries indoors as the charger is
designed for indoor use only.
• DANGER. If the battery pack is cracked or damaged in
any other way, do not insert it in the charger. There is
a danger of electric shock or electrocution.
• WARNING. Do not allow any liquid to come into contact
with the charger. There is a danger of electric shock.
• To allow the battery pack to cool down after charging,
do not place it in a hot environment such as a metal
shed or open trailer left in the sun.
• If you are interrupted when operating the drill,
complete the process and switch off before looking up.
• Periodically check that all nuts, bolts and other fixings
are properly tightened.
• When using the drill, use safety equipment including
safety glasses or shield, ear defenders, and protective
clothing including safety gloves. Wear a dust mask if
the drilling operation creates dust.
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.
The tool must be used only for its prescribed purpose.
Any use other than those mentioned in this Manual will
• The charger is not intended for any use other than
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charging the exact type of rechargeable battery pack as
supplied with the charger.Any other use may result in
the risk of fire, electric shock or electrocution.
• The charger and battery packs supplied with it are
specifically designed to work together. Do not attempt
to charge the battery pack with any other charger than
the one supplied.
• Do not place any object on top of the charger as it
could cause overheating. Do not place the charger near
any heat source.
• Do not pull on the lead of the charger to disconnect it
from the power source.
• Make sure that the charger cable is positioned where
it will not be stepped on, tripped over or otherwise
subjected to damage or stress.
• Do not use an extension cord unless it is absolutely
necessary. The use of an improper extension cord could
cause the risk of fire, electric shock or electrocution.
• Do not use the charger if it has been subjected to a
heavy knock, dropped or otherwise damaged in any
way. Take the charger to an authorised service centre
for a check or repair.
• Do not disassemble the charger. Take it to an
authorised service centre when service or repair is
required. Incorrect re-assembly may result in the risk of
fire, electric shock or electrocution.
• If you wish to charge a second battery pack, unplug
the charger from the mains supply and leave it for at
least 15 minutes. After this time you can charge a
second battery pack.
Additional safety instructions for the
battery pack
• The battery pack for this tool has been shipped in a low
charge condition.You should charge the battery pack
fully before use.
• To ensure the longest battery life and best battery
performance, always charge the battery when the air
temperature is between 18–24°C. Do not charge the
battery pack when the temperature is below 0°C, or
above 40°C. This is important. Failure to observe this
safety rule could cause serious damage to the battery
pack.
• Do not incinerate the battery pack even if it is seriously
damaged or can no longer hold a charge. The battery
pack can explode in a fire.
• Never attempt to open the battery pack for any reason.
If the plastic housing of the battery pack breaks open
or cracks, immediately discontinue its use and do not
recharge it.
• The battery pack utilizes nickel-cadmium cells.
Cadmium is considered to be a toxic material. Use an
environmentally safe disposal unit at a municipal
waste disposal centre to dispose of a damaged or worn
out battery.
• To reduce the risk of an electric shock, unplug the
charger from the power supply before attempting to
clean it. Removing the battery alone does not reduce
the risk.
• Never attempt to connect two chargers together.
• Do not store or use the tool and battery pack in
locations where the temperature may reach or exceed
104°F (40°C) such as alongside sheds or metal
structures in the summer.
• The charger is designed for use from a standard
household electrical supply (230–240 volts). Do not
attempt to connect the charger to a supply with a
different supply.
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Know your product
This drill is mainly used for drilling
in wood or metal sheet and
screwdriving. Use the tool and
accessories only for
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5
intended applications.
All other applications are
expressly ruled out.
1. Keyless chuck
2. Torque collar
1
2
3. Trigger with variable speed control
4. Forward/reverse switch
5. Side handle
4
6. Side handle clamp knob
7. Battery pack release tabs
8. Rechargeable battery pack
9. Slim line adaptor
3
10. Charger
11. LED Lights
12. Battery indicator button
13. LED Light switch
13 11 12
10
7
8
9
8
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3.Plug in the charger and switch
on. The red LED indicator will
show power to the adaptor and
that charging is
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.
taking place.
4.The battery charging time is
approximately 3–5 hours. The
red LED goes out when the
charging cycle is complete.
Turn off the charger power supply from the mains and
then remove the battery from the line adaptor.
Note: The LED will continue to come on and off
approximately every 15 minutes after the battery is fully
charged.
Fitting and removing the battery pack
To remove the battery pack from the drill firmly press the
battery release tabs (7) at either side of the battery pack,
and slide the battery backward out of the tool.
To install the battery pack, align rails, on the tool with
the tabs on the battery pack and slide the battery pack on
to the drill. Ensure the battery
To obtain the best life for the battery
pack is sitting straight on the
Never allow the drill to come to a complete stand still
before recharging. The battery should be placed on charge
whenever the battery is noticeably running down or the
drill no longer performs a task it previously performed.
Avoid conducting short charges. Make sure that the battery
is fully charged every time by allowing the charger to
complete its full charging cycle.
Avoid allowing lose items like screws or nails etc to be
stored with battery packs as these or similar items can
short battery packs and cause a fire or explosion.
foot and correctly entering the
runners. The battery should
slide fully on to the drill foot
until the battery pack “clicks”
into position.
Battery charging
Important. Before plugging in the power supply from the
charger to the slim line adaptor always ensure that the
plug is switched off at the mains.
Important. The battery will be fully charged after 3-5
hours, remove it from the charger after this time. Do not
leave a battery charging for longer than 24 hours.
1.Align and slide the slim line
adaptor (9) onto the battery
until the battery pack latches
“click” into position. Check
the adaptor is flush with the
battery and there is a firm
connection.
Always unplug the charger when not in use and store in a
dry secure place.
Avoid charging or storing your battery in temperatures
below 0ºC and above 40ºC.
Battery indicator
To activate the battery indicator
feature first pull the trigger
switch (3) then press the
battery indicator button (12),
this will display the level of
charge remaining in the battery.
There are 3 levels of charge low,
medium and high. When the
2.Connect the power supply
from the charger to the slim
line adaptor via the socket in
the rear of the adaptor housing.
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battery indicator is showing only 1 LED (low) the battery
should be removed and put on the charger.
Drilling uses the forward mode. The reverse mode is
intended for the removal of screws.
LED Work area light
Adjustable torque
The drill has 3 LED lights (11)
to illuminate the work area and
improve vision when drilling in
areas with insufficient light.
This drill is equipped with 20
torque settings plus one drill
setting which are controlled
by the torque collar (2). By
rotating the collar behind the
chuck, it is possible to adjust
the torque.
To turn the LED lights on and
off depress the LED light switch
(13).
This will allow better control
when using the drill as a
Using the drill
Use the forward/reverse switch (4) to select the direction
of rotation, then pull the trigger (3). This trigger switch is
an electronic variable speed control which enables the user
to vary the speed continuously. The speed varies according
to how far the trigger switch is depressed, the further it is
depressed the faster the chuck will rotate and the lighter it
is depressed, the slower it will rotate.
screwdriver as it prevents over-tightening of the screws.
For drilling, always use the use the Drill position by
aligning the Drill symbol with the triangular indicator on
the front face of the drill near the torque collar.
For setting the torque position, select a low setting on
the torque collar and align the selected symbol with
the triangular indicator on the top of the drill. Increase
gradually to set the correct torque. It is better to use a
scrap piece of material if possible to set the torque.
To stop the drill, release the trigger switch.
Inserting and removing bits
This drill has a keyless chuck, which means that a chuck
key is not needed to secure a bit in the drill.
1.Open the chuck by holding
the rear section of the chuck
firm and rotating the front
section in a anti-clockwise
direction, sufficiently enough
to allow the drill bit required
to fully enter the jaws of the
chuck.
Note. You can only change the direction of rotation of the
drill using the forward/reverse
switch when the trigger is NOT
depressed.
Forward/reverse switch
2.Ensure the drill bit is fully
inserted, so that the chuck
This switch (4) will allow you
to change the direction of
the motor while the trigger
switch is not depressed.
jaws grip the straight section of the bit.
3.Holding the rear section of the chuck firmly, rotate the
front section of the chuck clock-wise until the jaws
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tighten on the drill bit. The front section of the chuck
needs to be tightened firmly to ensure the drill bit is
held securely.
Drilling masonry
• This drill is not designed for drilling masonry. Purchase
or hire a Hammer drill.
4.To remove the drill bit, hold the rear section of the
chuck firmly and rotate sharply the front section of the
chuck in a anti-clockwise direction, sufficiently enough
to allow the drill bit to be removed.
Drilling wood
• Clamp a piece of scrap wood to the back of your work to
prevent splintering.
All drilling operations
• Mark off the centre of the hole using a centre punch
or nail.
• Don’t force the drill, let it work at its own pace
• Keep the drill bit sharp.
• Reduce pressure, as the drill is about to break through
the item being drilled.
Adjustable side handle
1.Turn the side handle clamp
knob (6) anti-clockwise
to loosen the collar fully and
slip it over the chuck (1) onto
the drill.
2.Adjust the position of the
side handle (5) to suit the
application and tighten the
side handle clamp knob (6)
to secure it in place.
Chuck replacement
The chucks of reversible drills are always fixed by a screw
with a left-hand thread. The screw, which is located in the
centre of the chuck, must be removed before the chuck can
be removed. To remove the screw, turn it in a clockwise
direction. The chuck can now be removed by unscrewing it
anti-clockwise. If you have trouble removing the chuck take
the drill to your nearest authorised service centre for chuck
replacement.
Drilling
Drilling metals
• Always clamp sheet metal.
• Support thin metal with a block of wood to avoid
distorting it.
• Use a punch to mark the centre of the hole.
Caution. Always ensure that the drill is switched off
and the battery pack is removed before making any
adjustments.
• Use a suitable lubricant for the material you are
working on,
Maintenance
USE:
FOR:
• Store the tools, instruction manual and where necessary
the accessories in the original packaging. In this way
you will always have all the information and parts ready
to hand.
Oil
Steel
Turpentine or paraffin
Do not lubricate
Aluminium
Brass, copper or cast iron
• Do not throw used batteries into fire or water. There is
a danger of explosion! Please hand in non-working or
used batteries, or tools with built-in batteries, to the
environmentally-safe disposal unit at a municipal waste-
disposal centre, or to your dealer.
Drilling plastics and plastic coated chipboard
• Use high speed drill bits
• See drilling wood below
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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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