600W
BISCUIT JOINER
BJ600
INSTRUCTION MANUAL
Code: BJ600 IM
Black
Cyan
Magenta
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Yellow
Date: 080620
Edition: 04
Op: PS
Introduction
Description of symbols
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.
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.
You will find your new tool easy and safe to operate,
and, with proper care, it will give you many years
of dependable service.
Double insulated for additional protection.
CAUTION. Carefully read through this entire Instruction
Manual before using your new GMC Power Tool. Take
special care to heed the Cautions and Warnings.
Conforms to relevant standards
for electromagnetic compatibility.
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
Nominal voltage:
230-240V ~ 50Hz
600W
11000 min-1
8mm, 10mm, 12mm, 14mm
4mm
Input power:
No load speed:
Depth of cut:
Thickness of cut:
Biscuit size:
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.
#0, #10, #20
Ø100mm 6TCT
Ø22mm
Blade size:
Bore size:
Bevel fence:
0–90º
Height of cut adjustment:
Insulation class:
Weight:
7mm to 30mm
Double insulated
2.8kg
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3. Personal safety
General safety rules
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.
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.
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.
Save these instructions.
1. Work area
a. Keep work area clean and well lit. Cluttered and dark
areas invite accidents.
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.
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.
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.
c. Keep children and bystanders away while operating a
power tool. Distractions can cause you to lose control.
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.
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.
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.
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.
c. Do not expose power tools to rain or wet conditions.
Water entering a power tool will increase the risk of
electric shock.
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.
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.
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.
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• 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.
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.
• Ensure your mains supply voltage is the same as your
tool rating plate voltage.
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.
• If possible, always use clamps or a vice to hold your work.
• Always switch off before you put the biscuit joiner down.
• Ensure that the lighting is adequate.
• Keep the area free of tripping hazards.
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.
• Do not let anyone under 18 years operate this tool.
• Only use accessory blades that are in good condition.
• Do not touch the blade after operation. It will be hot.
• Keep yours hands away from under the workpiece.
• Never use your hands to remove chips or waste close by
the blade.
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.
• Rags, cloths, cord, string and the like should never be left
around the work area.
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.
• Support the work properly.
• Periodically check that all nuts, bolts and other fixings are
properly tightened.
• When using the tool, use safety equipment including
safety glasses or shield, ear protection, and protective
clothing including safety gloves. Wear a dust mask if the
operation creates dust.
5. 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.
• 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.
Wear goggles
Additional safety rules for biscuit joiners
Wear earmuffs
• Hold tool by insulated gripping surfaces when performing an
operation where the cutting tools may contact hidden wiring
or its own cord. Contact with a “live” wire will make exposed
metal parts of the tool “live” and shock the operator.
Wear a breathing mask
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.
• Fully unwind cable drum extensions to avoid potential
overheating.
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To use this tool properly, you must observe the safety
regulations, the assembly instructions and the operating
instruction 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 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 tools construction and
design:
Damage to the lungs if an effective dust mask is not worn.
Damage to the hearing if effective ear protection is not worn.
Contents of carton
The GMC BJ600 biscuit joiner is supplied with the following
accessories as standard
• Pin wrench
• Allen key
• Dust extraction adaptor
• Dust bag
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.
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Know your product
1. On/off switch
2. Spindle lock button
3. Main handle
3
1
4
4. Secondary handle
5. Depth of cut adjustment knob
6. Main fence
11
7. Height and bevel
adjustment fence
8. Bevel scale
9. Bevel adjustment knob
10. Height scale
11. Height adjustment knob
12. Dust extraction port
13. Dust extraction adaptor
14. Dust bag
2
7
8
9
14
10
13
6
5
12
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be increased simply by adjusting the fence up or down and
carrying out several passes.
Overview
The biscuit joiner is designed for the cutting and joining
of dressed timber. It provides an accurate, effective and
convenient alternative to other means of jointing such as
dowelling and can be particularly useful for edge jointing long
boards of natural wood or manufactured sheeting.
Adjusting the cutting depth
The depth of cut can be set to match the dimensions of the
particular size biscuit being used.
The numbers on the depth adjustment dial (0, 10 & 20)
coincide with the three most common biscuit sizes. The
letter ‘M’ stands for maximum depth capacity of the tool.
The 100mm TCT blade is plunged into the wood to the
required depth, which is pre-set depending on the biscuit to
be used.
The table below indicates the cutting depth for each setting.
Biscuit No.
Width
Length
Depth Setting
Depth of Cut
#0
16mm
48mm
0
8mm
#10
#20
20mm
24mm
52mm
60mm
10
20
10mm
12mm
14mm
PVA wood glue is applied and the biscuit is inserted into
the elliptical slot that is left by the blade. As the glue sets,
the water content in the glue is absorbed into and expands
the biscuit, resulting in an extremely strong joint.
Max
The width of a biscuit may vary slightly due to variances in
manufacture. The blade has been designed to allow fitment
of up to the largest biscuits in the slot cut.
Note. You must use PVA glue designed for woodworking
applications
1. To select a depth, align the
appropriate number with the
A
mark on the tool’s housing
that matches with the size
of biscuit you will be using.
Rotate the depth adjustment
dial (5) to the desired position
until it “clicks” into place (fig A).
#0 = 16mm x 48mm
#10 = 20mm x 52mm
#20 = 24mm x 60mm
#20
#10
#0
The adjustable fence allows the height and angle of the
blade to be positioned to suit different joint requirements.
The depth of cut can be set on the depth of cut control dial,
depending on the biscuit to be used. The joiner can also be
used to create a continuous groove, the width of which can
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3. Tighten the bevel adjustment
knob (9) to secure the
fence in position (fig G).
Adjusting the secondary handle
1. Using an Allen key loosen the set screw on each side of
the handle (fig B).
G
Adjusting the cutting
height
B
C
The height of the fence can be
adjusted to let you make biscuit
slots at different depths down
from the surface of the workpiece.
1. Ensure that the fence is set at 0°.
2. Position fence (7) to the desired height using the scale
(10) on the main fence as a guide (fig H).
2. Position the handle to the desired position (fig C).
3. Tighten the 2 hex screws to secure the handle in position.
I
H
Fitting the height and
bevel adjustment fence
D
1. Attach the height and bevel
adjustment fence to the main
fence by sliding it over the top
of the main fence (fig D).
3. Tighten the height adjustment knob (10) by rotating it in a
clockwise direction to secure the fence in position (fig I).
Adjusting the bevel angle
The adjustable tilt feature allows
slots to be cut on a bevelled edge.
Anti-slip rubber grips
1. Loosen the bevel adjustment knob (9) by rotating it in an
anti-clockwise direction (fig E).
Biscuit jointers tend to pull to the
right when making a cut. The
anti-slip rubber grips have been
provided to reduce this effect
and help keep the biscuit joiner
steady on the workpiece (fig J).
J
F
E
2. Move the fence to the desired angle between 0° and 90°
using the bevel scale (8) and pointer as
a guide (fig F).
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10. Ensure that the spindle lock button is released.
Changing the blade
CAUTION. Always ensure that the biscuit joiner is switched
off and unplugged from the power supply before making any
adjustments.
1. Loosen and remove the 4 screws on the base of the
biscuit joiner.
WARNING. The direction in which the blade rotates has to
be the same as the direction of the arrow marked on
the housing.
IMPORTANT. After replacing the cutting blade, check that it
runs freely by first testing if it spins by hand.
11. Replace the base plate and secure with the 4 screws.
2. Remove the base plate to reveal the blade (fig K).
12. Plug the machine into a power socket and run the
biscuit joiner under no load to check that it runs
smoothly before using it to cut any material.
K
L
Turning on and off
1. Connect the plug to the power point.
2. Push the on/off switch (1) forward and up over the
latching ramp to lock the switch on (fig O).
3. Whilst holding the spindle lock button (2) rotate the blade
by hand until the blade locks in place (fig L).
O
P
4. Whilst depressing the spindle lock button, turn the blade
flange anti-clockwise using the pin wrench provided
(fig M).
N
M
3. Once cutting is finished, pull in and release the on/off
switch (1) to stop the motor (fig P).
WARNING. The blade continues to turn for a few seconds
even though the switch is turned off. Keep your hands well
away from the moving blade.
5. Remove the outer blade flange (fig N).
6. Remove the blade from the inner flange.
7. Clean the blade flanges thoroughly before mounting the
new blade. Wipe a drop of oil onto the inner and outer
flange where they will touch the blade.
8. Mount the new blade onto the spindle and against the
inner flange.
9. Replace the outer flange and tighten.
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To cut the biscuit slot, the body
of the joiner is moved toward the
material. By utilising the various
features of the tool you can
create a wide range of different
types of joints.
Direction of Plunge
Centre line of
work and machine
Dust extraction
CAUTION. Always ensure that the biscuit joiner is switched
off and unplugged from the power supply before making any
adjustments or connecting accessories.
1. Fit the dust extraction adaptor (13) to the port (12) when
connecting the tool to a dust extraction system (fig Q).
Crescent
shape cut
Always make a reference line
to line up the machine with the
centre of the material to be
Q
R
plunged to ensure accurate biscuit placement.
Operation – Making a cut
1. Mark the all the opposing boards at the point at which
you intend on making a cut. Clamp the material to a
suitable work surface prior to making any cuts.
2. Adjust the height of the fence as required for
the application.
2. The dust bag (14) can be connected to the adaptor (fig R).
Operation overview
A biscuit joiner is ideal for making a variety of strong
and accurate joints, the most common are:
3. Adjust the bevel angle of the fence as required
for the application.
4. Line up the cutting guide located centre to the front of the
fence with the cutting line on the workpiece and place the
biscuit joiner against the workpiece.
Edge to Edge
Mitre Joints
5. Turn on the biscuit joiner using the on/off switch.
6. Whilst holding the rear handle push the biscuit joiner
forward so that the blade plunges into the workpiece.
7. Allow the return spring to retract the blade from the slot
and then switch off. Repeat this process for each marked
point along the workpiece.
Butt Joints
T Joints
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11. When all slots have been cut, clean the edge and slots
of any remaining sawdust.
Making an edge to edge joint
12. Place the biscuits into position and fit the matching
timber pieces together.
13. Clamp the boards and wipe clean any excess glue and
leave to set as per the glues specifications.
NOTE: It is possible that thick pieces of timber may
require two biscuits at each location, one at a height
of about 1/3rd the thickness of the wood, and the other
at about 2/3rd the thickness.
Centreline Mark(s)
1. Position the 2 pieces together and draw a reference mark
at 90º to the centre point of each proposed joint location.
Space the joints about 4 inches apart.
Making a mitre joint
2. Set the cutting depth to suit the biscuits you are using.
Generally, #20 biscuits suit most applications. If you are
using stock that is 482.6mm thick or less, you will need
smaller biscuits.
3. Adjust the height of the fence as required. Typically this
is centre to the material thickness. There is a red marker
on the side of the machine to indicate where the blades
extends out from.
1. Slots for a mitre joint can be cut with the workpiece
secured flat on the bench and the fence tilted to the
required angle.
4. Place the cutting guide at the centre point of each
slot in turn and press the fence against the edge
of the workpiece.
2. Position the 2 pieces together and draw a reference mark
at the centre point of each proposed joint location.
5. Switch on the biscuit joiner and plunge the blade forward
to make the cut.
3. Place the cutting guide at the centre point of each slot
in turn and press the fence against the edge of the
workpiece.
6. Allow the return spring to retract the blade from the slot
and then switch off.
7. To cut a slot in the edge of the matching workpiece,
place this piece on a flat surface and place the biscuit
joiner against the edge.
4. Switch on the biscuit joiner and plunge the blade forward
to make the cut.
5. Allow the return spring to retract the blade from the slot
and then switch off.
8. Again line up the centre point of each slot and make the cuts.
9. Once all the slots are cut insert a biscuit into each joint
and dry assemble the workpieces to ensure everything
lines up and fits.
6. Once all the slots are cut insert a biscuit into each joint
and dry assemble the workpieces to ensure everything
lines up and fits.
10. Insert a water-based glue along the adjoining edges and
in to the slots.
7. Insert a water-based glue into the slots.
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8. When all slots have been cut, clean the edge and slots of
any remaining sawdust.
3. Cut the slots into the workpiece that will become the
vertical board.
9. Place the biscuits into position and fit the matching timber
pieces together.
4. Cut the slots into the workpiece that will become the
horizontal board
10. Clamp the boards and wipe clean any excess glue and
leave to set as per the glues specifications.
5. Once all the slots are cut insert a biscuit into each joint
and dry assemble the workpieces to ensure everything
lines up and fits.
Making a corner joint
1. Set the 2 pieces together and
6. Insert a water-based glue into the slots.
7. When all slots have been cut, clean the edge and slots of
any remaining sawdust.
draw the joint centres on the
outside face and end.
C e n t r e l i n e
m a r k ( s )
8. Place the biscuits into position and fit the matching timber
pieces together.
2. Cut the slots into the end
B i s c u i t s l o t
piece.
9. Clamp the boards and wipe clean any excess glue and
leave to set as per the glues specifications.
3. Cut the slots in the face piece.
4. Once all the slots are cut
insert a biscuit into each joint
and dry assemble the workpieces to ensure everything
lines up and fits.
Maintenance
All the bearings are sealed ball bearings, lubricated for life,
and require no maintenance.
5. Insert a water-based glue into the slots.
Regularly check that all the fixing screws are tight.
They may vibrate loose over time.
6. When all slots have been cut, clean the edge and slots of
any remaining sawdust.
Power cord maintenance
7. Place the biscuits into position and fit the matching timber
pieces together.
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.
8. Clamp the boards and wipe clean any excess glue and
leave to set as per the glues specifications.
Cleaning
Making a T-joint
1. Keep the tool’s air vents unclogged and clean at all times.
1. Place the 2 pieces to be joined on a level bench.
2. Remove dust and dirt regularly. Cleaning is best done
with a rag. Wear safety goggles or an eye shield and
gloves whist cleaning.
2. Mark the centreline for each biscuit.
3. Keep all moving parts free of built up sawdust and other
foreign matter.
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.
Clamp.
To cut end slots in
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Trouble shooting
WARNING!
Turn the on/off switch to the off position and unplug the tool
from the power supply before performing trouble shooting procedures.
Trouble
Problem
Suggested remedy
Biscuit joiner
will not start
Power cord not plugged in
Power fault, fuse or circuit breaker tripped
Cord damaged
Ensure that the cord is connected to the power supply
Check the power supply
Use qualified electrical repairer to repair or replace
Use qualified electrical repairer to repair or replace
Use qualified electrical repairer to repair or replace the motor
Use extension cord heavy enough to carry the current
Burned out switch
Faulty motor
Blade does not Extension cord too long or undersized
reach full speed
Tool is overheating
Turn off the tool and let it cool down to room
temperature. Inspect and clean the ventilation slots
Biscuit does
not fit into slot
Incorrect biscuit being used
Check to see that the biscuit is the same size as
the slot cut. ie. use a #10 biscuit for a #10 slot.
Poor cutting
Accessory blunted
Loose parts
Replace with new biscuit joiner blade
Vibration or
abnormal noise
Check to see that all levers are secure including bevel
adjustment knob and height adjustment knob
Blade vibrating
Ensure that the blade flange is securely tightened
Use qualified electrical repairer to repair or replace
Moving parts excessively worn
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GMC customer assist
If your product needs repairing 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 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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