Makita GA7020 User manual

INSTRUCTION MANUAL
WARNING:
For your personal safety, READ and UNDERSTAND before using.
SAVE THESE INSTRUCTIONS FOR FUTURE REFERENCE.
ENGLISH
Angle Grinder
MODEL GA7020/GA7020F
MODEL GA7020S/GA7020SF
MODEL GA9020/GA9020F
MODEL GA9020S/GA9020SF
006732
DOUBLE
INSULATION

2
SPECIFICATIONS
• Due to our continuing programme of research and development, the specifications herein are subject to change
without notice.
• Note: Specifications may differ from country to country.
Symbols END202-2
The following show the symbols used for the tool. Be
sure that you understand their meaning before use.
...................Read instruction manual.
...................DOUBLE INSULATION
....................Wear safety glasses.
..................Only for EU countries
Do not dispose of electric equipment
together with household waste
material!
In observance of European Directive
2002/96/EC on waste electric and
electronic equipment and its
implementation in accordance with
national law, electric equipment that
have reached the end of their life
must be collected separately and
returned to an environmentally
compatible recycling facility.
Intended use
The tool is intended for grinding, sanding and cutting of
metal and stone materials without the use of water.
Power supply
The tool should be connected only to a power supply of
the same voltage as indicated on the nameplate, and
can only be operated on single-phase AC supply. They
are double-insulated in accordance with European
Standard and can, therefore, also be used from sockets
without earth wire.
For public low-voltage distribution systems of
between 220 V and 250 V.
Switching operations of electric apparatus cause voltage
fluctuations. The operation of this device under unfavora-
ble mains conditions can have adverse effects to the
operation of other equipment. With a mains impedance
equal or less than 0.27 Ohms it can be presumed that
there will be no negative effects. The mains socket used
for this device must be protected with a fuse or protective
circuit breaker having slow tripping characteristics.
For European countries only
Noise and Vibration
The typical A-weighted noise levels are
sound pressure level: 90 dB (A)
sound power level: 103 dB (A)
– Wear ear protection. –
The typical weighted root mean square acceleration
value is not more than 2.5 m/s2.
These values have been obtained according to
EN50144.
EC-DECLARATION OF CONFORMITY
We declare under our sole responsibility that this product
is in compliance with the following standards of stand-
ardized documents, EN50144, EN55014, EN61000 in
accordance with Council Directives, 73/23/EEC, 89/336/
EEC, 98/37/EC.
Yasuhiko Kanzaki CE 2005
Director
MAKITA INTERNATIONAL EUROPE LTD.
Michigan Drive, Tongwell, Milton Keynes, Bucks MK15
8JD, ENGLAND
Responsible manufacturer:
Makita Corporation Anjo Aichi Japan
Model GA7020/GA7020F/GA7020S/GA7020SF GA9020/GA9020F/GA9020S/GA9020SF
Depressed center wheel diameter 180 mm 230 mm
Spindle thread M14 M14
No load speed (min-1)8,500 6,600
Overall length 473 mm 473 mm
Net weight 4.7 kg 4.7 kg
Safety class /II

3
SAFETY INSTRUCTIONS ENA001-2
WARNING:
When using electric tools, basic safety precautions, including the following,
should always be followed to reduce the risk of fire, electric shock and
personal injury. Read all these instructions before operating this product
and save these instructions.
For safe operations:
1. Keep work area clean.
Cluttered areas and benches invite injuries.
2. Consider work area environment.
Do not expose power tools to rain. Do not use
power tools in damp or wet locations. Keep work
area well lit. Do not use power tools where there is
risk to cause fire or explosion.
3. Guard against electric shock.
Avoid body contact with earthed or grounded sur-
faces (e.g. pipes, radiators, ranges, refrigerators).
4. Keep children away.
Do not let visitors touch the tool or extension cord.
All visitors should be kept away from work area.
5. Store idle tools.
When not in use, tools should be stored in a dry,
high or locked up place, out of reach of children.
6. Do not force the tool.
It will do the job better and safer at the rate for which
it was intended.
7. Use the right tool.
Do not force small tools or attachments to do the job
of a heavy duty tool. Do not use tools for purposes
not intended; for example, do not use circular saws
to cut tree limbs or logs.
8. Dress properly.
Do not wear loose clothing or jewellery, they can be
caught in moving parts. Rubber gloves and non-skid
footwear are recommended when working outdoors.
Wear protecting hair covering to contain long hair.
9. Use safety glasses and hearing protection.
Also use face or dust mask if the cutting operation is
dusty.
10. Connect dust extraction equipment.
If devices are provided for the connection of dust
extraction and collection facilities ensure these are
connected and properly used.
11. Do not abuse the cord.
Never carry the tool by the cord or yank it to discon-
nect it from the socket. Keep the cord away from
heat, oil and sharp edges.
12. Secure work.
Use clamps or a vice to hold the work. It is safer
than using your hand and it frees both hands to
operate the tool.
13. Do not overreach.
Keep proper footing and balance at all times.
14. Maintain tools with care.
Keep cutting tools sharp and clean for better and
safer performance. Follow instructions for lubrica-
tion and changing accessories. Inspect tool cord
periodically and if damaged have it repaired by an
authorized service facility. Inspect extension cords
periodically and replace, if damaged. Keep handles
dry, clean and free from oil and grease.
15. Disconnect tools.
When not in use, before servicing and when chang-
ing accessories such as blades, bits and cutters.
16. Remove adjusting keys and wrenches.
Form the habit of checking to see that keys and
adjusting wrenches are removed from the tool
before turning it on.
17. Avoid unintentional starting.
Do not carry a plugged-in tool with a finger on the
switch. Ensure switch is off when plugging in.
18. Use outdoor extension leads.
When tool is used outdoors, use only extension
cords intended for outdoor use.
19. Stay alert.
Watch what you are doing. Use common sense. Do
not operate tool when you are tired.
20. Check damaged parts.
Before further use of the tool, a guard or other part
that is damaged should be carefully checked to
determine that it will operate properly and perform
its intended function. Check for alignment of moving
parts, free running of moving parts, breakage of
parts, mounting and any other conditions that may
affect its operation. A guard or other part that is
damaged should be properly repaired or replaced
by an authorized service center unless otherwise
indicated in this instruction manual. Have defective
switches replaced by an authorized service facility.
Do not use the tool if the switch does not turn it on
and off.
21. Warning.
The use of any accessory or attachment, other than
those recommended in this instruction manual or
the catalog, may present a risk of personal injury.
22. Have your tool repaired by a qualified person.
This electric tool is in accordance with the relevant
safety requirements. Repairs should only be carried
out by qualified persons using original spare parts,
otherwise this may result in considerable danger to
the user.

4
ADDITIONAL SAFETY RULES ENB031-6
1. Always use eye and ear protection. Other per-
sonal protective equipment such as dust mask,
gloves, helmet and apron should be worn.
2. Always be sure that the tool is switched off and
unplugged before carrying out any work on the
tool.
3. Keep guards in place.
4. Use only wheels with correct size and wheels
having a maximum operating speed at least as
high as the highest No Load Speed marked on
the tool’s nameplate. When using depressed
center wheels, be sure to use only fiberglass-
reinforced wheels.
5. Check the wheel carefully for cracks or damage
before operation. Replace cracked or damaged
wheel immediately.
6. Observe the instructions of the manufacturer for
correct mounting and use of wheels. Handle and
store wheels with care.
7. Do not use separate reducing bushings or adap-
tors to adapt large hole abrasive wheels.
8. Use only flanges specified for this tool.
9. Do not damage the spindle, the flange (espe-
cially the installing surface) or the lock nut.
Damage to these parts could result in wheel
breakage.
10. For tools intended to be fitted with threaded
hole wheel, ensure that the thread in the wheel
is long enough to accept the spindle length.
11. Before using the tool on an actual workpiece,
test run the tool at the highest no load speed for
at least 30 seconds in a safe position. Stop
immediately if there is any vibration or wobbling
that could indicate poor installation or a poorly
balanced wheel. Check the tool to determine the
cause.
12. Check that the workpiece is properly supported.
13. Hold the tool firmly.
14. Keep hands away from rotating parts.
15. Make sure the wheel is not contacting the work-
piece before the switch is turned on.
16. Use the specified surface of the wheel to per-
form the grinding.
17. Do not use cutting off wheel for side grinding.
18. Watch out for flying sparks. Hold the tool so that
sparks fly away from you and other persons or
flammable materials.
19. Pay attention that the wheel continues to rotate
after the tool is switched off.
20. Do not touch the workpiece immediately after
operation; it may be extremely hot and could
burn your skin.
21. Position the tool so that the power cord always
stays behind the machine during operation.
22. If working place is extremely hot and humid, or
badly polluted by conductive dust, use a short-
circuit breaker (30 mA) to assure operator
safety.
23. Do not use the tool on any materials containing
asbestos.
24. Do not use water or grinding lubricant.
25. Ensure that ventilation openings are kept clear
when working in dusty conditions. If it should
become necessary to clear dust, first discon-
nect the tool from the mains supply ( use non
metallic objects ) and avoid damaging internal
parts.
26. When use cut-off wheel, always work with the
dust collecting wheel guard required by domes-
tic regulation.
27. Cutting discs must not be subjected to any lat-
eral pressure.
SAVE THESE INSTRUCTIONS

5
FUNCTIONAL
DESCRIPTION CAUTION:
• Always be sure that the tool is switched off and unplugged before
adjusting or checking function on the tool.
Shaft lock
CAUTION:
• Never actuate the shaft lock when the spindle is moving. The tool may be
damaged.
Press the shaft lock to prevent spindle rotation when installing or removing
accessories.
Switch action
CAUTION:
• Before plugging in the tool, always check to see that the switch trigger
actuates properly and returns to the “OFF” position when released.
For tool with the lock-on switch
To start the tool, simply pull the switch trigger (in the B direction). Release the
switch trigger to stop. For continuous operation, pull the switch trigger (in the B
direction) and then push in the lock lever (in the A direction). To stop the tool
from the locked position, pull the switch trigger fully (in the B direction), then
release it.
For tool with the lock-off switch
To prevent the switch trigger from accidentally pulled, a lock lever is provided.
To start the tool, push in the lock lever (in the A direction) and then pull the
switch trigger (in the B direction). Release the switch trigger to stop.
For tool with the lock on and lock-off switch
To prevent the switch trigger from accidentally pulled, a lock lever is provided.
To start the tool, push in the lock lever (in the A direction) and then pull the
switch trigger (in the B direction). Release the switch trigger to stop.
For continuous operation, push in the lock lever (in the A direction), pull the
switch trigger (in the B direction) and then push the lock lever (in the A direc-
tion) further in.
To stop the tool from the locked position, pull the switch trigger fully (in the B
direction), then release it.
NOTE:
Models GA7020S, GA9020S, GA7020SF and GA9020SF begin to run slowly
when they are turned on. This soft start feature assures smoother operation
and less operator fatigue.
1. Shaft lock
1
006733
1. Switch trigger
2. Lock lever
1
2
A
B
006734

6
ASSEMBLY CAUTION:
•Always be sure that the tool is switched off and unplugged before
carrying out any work on the tool.
Installing side grip (handle)
CAUTION:
•Always be sure that the side grip is installed securely before operation.
Screw the side grip securely on the position of the tool as shown in the figure.
Installing or removing wheel guard
CAUTION:
•The wheel guard must be fitted on the tool so that the closed side of the
guard always points toward the operator.
Mount the wheel guard with the protrusion on the wheel guard band aligned
with the notch on the bearing box. Then rotate the wheel guard around 180
degrees counterclockwise. Be sure to tighten the screw securely.
To remove wheel guard, follow the installation procedure in reverse.
Installing or removing depressed center grinding
wheel/Multi-disc (accessory)
Mount the inner flange onto the spindle. Fit the wheel/disc on the inner flange
and screw the lock nut onto the spindle.
006735
1. Wheel guard
2. Screw
3. Bearing box
1
2
3
006736
1. Lock nut
2. Depressed center wheel
3. Super flange
4. Inner flange
1
2
3
4
006746

7
Super flange
Models GA7020F,GA7020SF,GA9020F and 9020SF are standard-equipped
with a super flange. Only 1/3 of efforts needed to undo lock nut, compared with
conventional type.
For Australia and New Zealand
Mount the inner flange onto the spindle. Fit the wheel/disc on the inner flange
and screw the lock nut with its protrusion facing downward (facing toward the
wheel).
To tighten the lock nut, press the shaft lock firmly so that the spindle cannot
revolve, then use the lock nut wrench and securely tighten clockwise.
To remove the wheel, follow the installation procedure in reverse.
Installing or removing cut-off wheel
For Australia and New Zealand
Mount the inner flange onto the spindle. Fit the cut-off wheel on over the inner
flange.
Mount the outer flange on the wheel and screw the lock nut with its protrusion
facing downward (facing toward the wheel).
To tighten the lock nut, press the shaft lock firmly so that the spindle cannot
revolve, then use the lock nut wrench and securely tighten clockwise.
To remove the wheel, follow the installation procedure in reverse.
1. Lock nut
2. Depressed center wheel
3. Inner flange
45 1
2
102
3
006747
1. Lock nut wrench
2. Shaft lock
1
2
006738
1. Lock nut
2. Outer flange 78
3. Cut-off wheel
4. Inner flange 78
5. Dust collecting wheel guard
1
2
3
4
45
78
78
5
006748

8
OPERATION WARNING:
•It should never be necessary to force the tool. The weight of the tool
applies adequate pressure. Forcing and excessive pressure could cause
dangerous wheel breakage.
•ALWAYS replace wheel if tool is dropped while grinding.
•NEVER bang or hit grinding disc or wheel onto work.
•Avoid bouncing and snagging the wheel, especially when working
corners, sharp edges etc. This can cause loss of control and kickback.
•NEVER use tool with wood cutting blades and other sawblades. Such
blades when used on a grinder frequently kick and cause loss of control
leading to personal injury.
CAUTION:
•Never switch on the tool when it is in contact with the workpiece, it may
cause an injury to operator.
•Always wear safety goggles or a face shield during operation.
•After operation, always switch off the tool and wait until the wheel has
come to a complete stop before putting the tool down.
Grinding and sanding operation
ALWAYS hold the tool firmly with one hand on rear handle and the other on the
side handle. Turn the tool on and then apply the wheel or disc to the work-
piece.
In general, keep the edge of the wheel or disc at an angle of about 15 degrees
to the workpiece surface.
During the break-in period with a new wheel, do not work the grinder in the B
direction or it will cut into the workpiece. Once the edge of the wheel has been
rounded off by use, the wheel may be worked in both A and B direction.
MAINTENANCE
CAUTION:
•Always be sure that the tool is switched off and unplugged before
attempting to perform inspection or maintenance.
The tool and its air vents have to be kept clean. Regularly clean the tool’s air
vents or whenever the vents start to become obstructed.
AB
15
006741
1. Exhaust vent
2. Inhalation vent
1
2
006744

9
Replacing carbon brushes
When the resin insulating tip inside the carbon brush is exposed to contact the
commutator, it will automatically shut off the motor. When this occurs, both car-
bon brushes should be replaced. Keep the carbon brushes clean and free to
slip in the holders. Both carbon brushes should be replaced at the same time.
Use only identical carbon brushes.
Use a screwdriver to remove the brush holder caps. Take out the worn carbon
brushes, insert the new ones and secure the brush holder caps.
To maintain product SAFETY and RELIABILITY, repairs, any other mainte-
nance or adjustment should be performed by Makita Authorized Service Cent-
ers, always using Makita replacement parts.
ACCESSORIES
CAUTION:
•These accessories or attachments are recommended for use with your Makita tool specified in this manual. The
use of any other accessories or attachments might present a risk of injury to persons. Only use accessory or
attachment for its stated purpose.
If you need any assistance for more details regarding these accessories, ask your local Makita Service Center.
1. Commutator
2. Insulating tip
3. Carbon brush
1
2
3
001146
1. Brush holder cap
2. Screwdriver
12
006745
•Wheel guard (Wheel cover)
•Inner flange
•Depressed center wheels
•Lock nut (For depressed center wheel)
•Rubber pad
•Abrasive discs
•Lock nut (For abrasive disc)
•Lock nut wrench
•Cut-off wheels
•Inner flange (For cut-off wheel)
•Outer flange (For cut-off wheel)
•Wire cup brush
•Side grip
•Dust collecting wheel guard

Memo
10

Memo
11

Makita Corporation Anjo, Aichi, Japan
884635-229