INSTRUCTION MANUAL
1400W
13mm Hammer Drill
• Melbourne • Perth • Auckland • Hong Kong • Shanghai
HD1400K
• Taipei • New York • Verona • London • Paris
040413 HD1400K ED5
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Description of 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.
Double insulated
for additional 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.
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.
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:
230–240V ~ 50Hz
1400W
0-2800 min-1
0-33000 min-1
13mm
Input power:
No load speed:
Number of impacts:
Chuck size:
Maximum drilling capacity:
Wood:
Steel:
Masonry:
32mm
13mm
16mm
Net weight:
3.4kg
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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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.
• 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.
• 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.
• 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.
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
• 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.
• Keep children and bystanders away while operating a
power tool. Distractions can cause you to
lose control.
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.
• 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.
• 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.
• 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.
• 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.
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.
• 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.
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• 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.
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.
• 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.
• 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.
• 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.
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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.
Additional safety rules for drills
• Wear ear protectors with impact drills.
Exposure to noise can cause hearing loss.
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.
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 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.
• 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.
• 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.
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:
• 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.
• 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.
• Damage to the lungs if an effective dust mask is not
worn.
• Damage to hearing if effective ear defenders are not
worn
• 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.
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Know your product
1. 13mm Single sleeve keyless metal chuck
2. Over-moulded auxiliary handle
3. Depth gauge
4. Drilling/hammer mode selector
5. Lock-on button
6. Forward/Reverse switch
7. Variable speed trigger switch
8. Speed dial
9
4
9. Spindle lock button
10. Metal gear box cover
3
6
1
5
7
10
8
2
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Unpacking
Installing and removing bits
CAUTION. Always ensure that the drill is switched off and
plug is removed from the power point before making any
adjustments.
1. The drill features a keyless chuck (1) and spindle lock
button (9) for greater convenience of use.
2. To insert a drill bit or other
accessory, press the spindle
lock button (9) with one
hand and use your other
hand to rotate the chuck
(1) anti-clockwise. Rotate it
sufficiently for the chuck to
open far enough to accept
the bit or accessory.
3. Fully insert the bit or accessory into the chuck (1) and
tighten securely by rotating the chuck clockwise with
one hand whilst holding the spindle lock button (9)
pressed with the other hand.
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.
Auxiliary handle and depth gauge
1. Turn the auxiliary handle (2)
anti-clockwise to loosen the
collar and slip it over the chuck
onto the drill.
2. Insert the depth gauge (3)
in the hole at the top of the
handle (2).
3. The auxiliary handle (2) can
swivel 360° for the most
comfortable position and
easiest operation.
4. The depth gauge (3) helps keep
an accurate depth when drilling
holes to a set depth.
5. To change the position of the
depth gauge (3), turn the
handle (2) grip anti-clockwise
until the depth gauge is loose
enough to slide through the
hole.
WARNING. Do not attempt to tighten the chuck by
gripping the front part and turning the drill on. Damage
to the tool and personal injury may result. Be sure to
tighten the chuck with the spindle lock button held
pressed to achieve maximum tightness.
6. Set the depth, checking the
depth with a steel rule for
most accurate measurement
and then turn the handle grip
clockwise to tighten both the
depth stop and the auxiliary
handle in the
required position.
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Operation
Starting and stopping
Operational controls
1. Ensure that the tool is in
good condition.
2. Plug the cordset into the
mains socket.
3. Depress the trigger switch (7)
to start the drill and release the
trigger when you wish to stop.
4. Press the lock-on button (5)
whilst the trigger is depressed
if you require continuous
operation.
To disengage the lock-on switch,
press the trigger then release it.
Reversing the direction of rotation
1. The forward/reverse switch (6)
protrudes from one side of the
drill to the other.
2. The arrow head symbol on each
side of the switch indicates the
direction of drilling when the
switch is pushed from that side.
The forward direction is selected
when the arrow head symbol
points to the front of the drill.
The reverse direction is selected
when the arrow head symbol
points to the rear of the drill.
CAUTION. Any attempt to reverse
the direction of rotation whilst
the drill is turning is likely to
permanently damage the motor, gearing or both.
Variable speed
trigger switch
1. You can adjust the speed of
the drill between zero and
maximum by varying the
pressure on the trigger. The
harder you press
Drilling/hammer mode selector
You can use the drill for both hammer action and normal
drilling.
1. Use the drilling/hammer mode
selector (4) to select hammer or
drill action. The type of drilling
selected is indicated by the
on the trigger the faster the drill
will operate.
symbol on each side of the drill.
2. Push the selector to for
hammer action.
3. Push the selector to for
drill action.
CAUTION. Change the mode of action only when the drill
has come to a complete standstill.
Speed adjustment
1. You can change the maximum
speed setting by turning the speed
dial (8) located on the trigger
switch (7). To increase the speed
turn the dial so that the thickest
part of the line is above the arrow
on the trigger, as shown in Fig. 1.
Fig. 1
NOTE. Hammer action drilling should only be preformed in
the forward direction.
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Chuck replacement
Chuck removal
Always wear eye protection.
Tighten the chuck around the shorter end of a hex key
(not supplied) of 5mm or greater size. Using a wooden
mallet or similar object, strike the longer end in the
clockwise direction. This will loosen the screw inside the
chuck.
Hints for use
Note. When drilling into masonry the drilling rate is fast
and burnout of the tip will occur if the drill bit is not
constantly cleared.
• Use only correctly sharpened drill bits, which are
suitable for the material being drilled.
• To drill hard materials, firm pressure is required on
the power tool. However, excessive pressure does not
improve performance and places unnecessary pressure
on the tool and its bit.
• When screw driving always use a pilot hole and set the
speed dial to low. Press firmly on the screw head and
pull the trigger gradually increasing the speed. It is
always wiser to test the screw driving on a scrap piece
of the same material you are using.
• Larger diameter holes in hard wood, steel and concrete
have to be drilled at slower speeds. However, the motor
must not be struggling with the operation. If the motor
is struggling DO NOT continue working, pull the drill
clear of the workpiece and run it on fast speed for a
minute or so allowing the motor time to cool down
before you continue with the task. If the job is too
hard for the drill do not continue otherwise you could
permanently damage the motor.
1. Open chuck jaws fully.
2. Insert a phillips head screwdriver into front of chuck
between jaws to engage screw head.
Remove screw by turning clockwise.
3. Place the hex key in chuck and
tighten. Using a wooden mallet or
similar object, strike key sharply in
the anti-clockwise direction. This
will loosen the chuck so that it can
be unscrewed by hand.
Chuck installation
1. Screw the chuck on by
hand as far as it will
go and insert screw (LH
thread).
2. Tighten the chuck around
the shorter end of a
• Concrete drilling should be carried out on the highest
speed.
DO NOT overload motor when drilling concrete.
DO NOT use too much pressure as the hammer action
relies on the drill bit being able to move back and forward
in the hole being drilled.
Always clear the flutes of the drill bit by removing it from
the hole regularly.
1/4”or large hex key
(not supplied) strike the
longer end in the clockwise direction with a wooden
mallet.
3. Remove the hex key and open the jaws fully. Tighten
the screw in the centre of the chuck firmly.
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Wood Drilling
• For maximum performance, use high speed steel bits for
wood drilling.
• Move drilling/hammer mode selector to drilling mode
• Secure the workpiece to prevent it from turning when
drilling.
• Begin drilling at a very low speed to prevent the bit
from slipping off the starting point. Increase the speed
as the drill bit bites into the material.
Masonry drilling
• For maximum performance use tungsten carbide-tipped
masonry impact bits when drilling holes in brick, tile,
concrete, etc.
• Move drilling/hammer mode selector to hammer mode
• Apply light pressure and medium speed for best results
in brick.
.
.
• Apply additional pressure and high speed for hard
materials such as concrete.
• When drilling through holes, place a block of wood
behind the workpiece to prevent ragged or splintered
edges on the back side of the hole.
• Do not lock the trigger in the ‘on’ position when the
drill may need to be stopped suddenly.
• When drilling in tile, practice on a scrap piece to
determine the best speed and pressure.
Cleaning
1. Keep your machine and its cord clean. The outside of
the machine can be cleaned using a damp soft cloth
with a mild detergent if required.
Metal drilling
• For maximum performance, use high speed steel bits for
metal or steel drilling.
2. Some maintenance products and solvents may damage
the plastic parts; these include products containing
benzene, trichloroethylene, chloride and ammonia.
• Move drilling/hammer mode selector to drilling mode
.
3. Excessive sparking generally indicates the presence
of dirt in the motor or abnormal wear on the carbon
brushes.
4. Take special care to keep the ventilation inlets/outlets
free from obstruction; cleaning with a soft brush
followed by a compressed air jet will usually be
sufficient to ensure acceptable internal cleanliness.
5. Wear eye protection when carrying out cleaning.
CAUTION. Do not use cleaning agents to clean the plastic
parts of the drill.
• Use a centre punch to mark the hole location on
the workpiece.
• Begin drilling at a very low speed to prevent the bit
from slipping off the starting point.
• Maintain a speed and pressure which allows cutting
without overheating the bit. Applying too much
pressure will:
Overheat the drill
Wear the bearings
Bend or burn bits
Produce off-centre or irregular shaped holes
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.
• When drilling large holes in metal it is recommended to
drill with a small bit at first, then finish with a larger
bit. Also, lubricate the bit with oil to improve drilling
action and increase bit life.
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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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