Makita GA4040C User manual

INSTRUCTION MANUAL
Angle Grinder
GA4040C
GA4540C
GA5040C
GA6040C
GA4041C
GA4541C
GA5041C
ENGLISH: Original instructions
DOUBLE INSULATION
Read before use.

2ENGLISH
SPECIFICATIONS
Model GA4040C GA4041C GA4540C GA4541C GA5040C GA5041C GA6040C
Wheel diameter 100 mm (4") 115 mm (4-1/2") 125 mm (5")
150 mm (6")
Max. wheel thickness 6.4 mm 7.2 mm 6.4 mm
Spindle thread M10 M14 or 5/8" (country specic)
Rated speed (n) / No load speed (n0)11,000 min-1 11,000 min-1 11,000 min-1 9,000 min-1
Overall length 303 mm 325 mm 303 mm 325 mm 303 mm 325 mm 303 mm
Net weight 2.3 kg 2.6 kg 2.5 kg 2.7 kg 2.5 kg 2.7 kg 2.6 kg
Safety class /II
• Due to our continuing program of research and development, the specications herein are subject to change with-
out notice.
• Specications may differ from country to country.
• Weight according to EPTA-Procedure 01/2003
Symbols
The following show the symbols used for the equip-
ment. 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 the European Directive,
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 and can, therefore, also be used
from sockets without earth wire.
General Power Tool Safety Warnings
WARNING Read all safety warnings and all
instructions. Failure to follow the warnings and instruc-
tions may result in electric shock, re and/or serious
injury.
Save all warnings and instruc-
tions for future reference.
The term "power tool" in the warnings refers to your
mains-operated (corded) power tool or battery-operated
(cordless) power tool.
Work area safety
1. Keep work area clean and well lit. Cluttered or
dark areas invite accidents.
2. Do not operate power tools in explosive atmo-
spheres, such as in the presence of ammable
liquids, gases or dust. Power tools create sparks
which may ignite the dust or fumes.
3. Keep children and bystanders away while
operating a power tool. Distractions can cause
you to lose control.
Electrical Safety
4. 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. Unmodied plugs and matching outlets will
reduce risk of electric shock.
5. Avoid body contact with earthed or grounded
surfaces such as pipes, radiators, ranges and
refrigerators. There is an increased risk of elec-
tric shock if your body is earthed or grounded.
6. Do not expose power tools to rain or wet con-
ditions. Water entering a power tool will increase
the risk of electric shock.
7. 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.
8. 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.
9. If operating a power tool in a damp location
is unavoidable, use a residual current device
(RCD) protected supply. Use of an RCD reduces
the risk of electric shock.
10. Use of power supply via a RCD with a rated
residual current of 30 mA or less is always
recommended.
Personal Safety
11. 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 inuence of drugs, alcohol or med-
ication. A moment of inattention while operating
power tools may result in serious personal injury.

3ENGLISH
12. Use personal protective equipment. Always
wear eye protection. Protective equipment such
as dust mask, non-skid safety shoes, hard hat, or
hearing protection used for appropriate conditions
will reduce personal injuries.
13. Prevent unintentional starting. Ensure the
switch is in the off-position before connecting
to power source and/or battery pack, picking
up or carrying the tool. Carrying power tools with
your nger on the switch or energising power tools
that have the switch on invites accidents.
14. 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.
15. Do not overreach. Keep proper footing and
balance at all times. This enables better control
of the power tool in unexpected situations.
16. Dress properly. Do not wear loose clothing or
jewellery. Keep your hair, clothing, and gloves
away from moving parts. Loose clothes, jewel-
lery or long hair can be caught in moving parts.
17. If devices are provided for the connection of
dust extraction and collection facilities, ensure
these are connected and properly used. Use of
dust collection can reduce dust-related hazards.
Power tool use and care
18. 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.
19.
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.
20. Disconnect the plug from the power source and/or
the battery pack from the power tool before making
any adjustments, changing accessories, or storing
power tools. Such preventive safety measures reduce
the risk of starting the power tool accidentally.
21. 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.
22. 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.
23. Keep cutting tools sharp and clean. Properly
maintained cutting tools with sharp cutting edges
are less likely to bind and are easier to control.
24.
Use the power tool, accessories and tool bits etc.
in accordance with these instructions, 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.
Service
25. Have your power tool serviced by a qualied
repair person using only identical replacement
parts. This will ensure that the safety of the power
tool is maintained.
26. Follow instruction for lubricating and chang-
ing accessories.
27.
Keep handles dry, clean and free from oil and grease.
Grinder safety warnings
Safety Warnings Common for Grinding, Sanding,
Wire Brushing, or Abrasive Cutting-Off Operations:
1.
This power tool is intended to function as a
grinder, sander, wire brush or cut-off tool. Read
all safety warnings, instructions, illustrations
and specications provided with this power tool.
Failure to follow all instructions listed below may
result in electric shock, re and/or serious injury.
2. Operations such as polishing are not recom-
mended to be performed with this power tool.
Operations for which the power tool was not designed
may create a hazard and cause personal injury.
3. Do not use accessories which are not specically
designed and recommended by the tool manufac-
turer. Just because the accessory can be attached to
your power tool, it does not assure safe operation.
4. The rated speed of the accessory must be at
least equal to the maximum speed marked on
the power tool. Accessories running faster than
their rated speed can break and y apart.
5. The outside diameter and the thickness of your
accessory must be within the capacity rating
of your power tool. Incorrectly sized accessories
cannot be adequately guarded or controlled.
6.
Threaded mounting of accessories must match
the grinder spindle thread. For accessories
mounted by anges, the arbour hole of the
accessory must t the locating diameter of the
ange. Accessories that do not match the mounting
hardware of the power tool will run out of balance,
vibrate excessively and may cause loss of control.
7. Do not use a damaged accessory. Before each use
inspect the accessory such as abrasive wheels for
chips and cracks, backing pad for cracks, tear or
excess wear, wire brush for loose or cracked wires.
If power tool or accessory is dropped, inspect for
damage or install an undamaged accessory. After
inspecting and installing an accessory, position
yourself and bystanders away from the plane of the
rotating accessory and run the power tool at maxi-
mum no-load speed for one minute. Damaged acces-
sories will normally break apart during this test time.
8. Wear personal protective equipment. Depending
on application, use face shield, safety goggles or
safety glasses. As appropriate, wear dust mask,
hearing protectors, gloves and workshop apron
capable of stopping small abrasive or workpiece
fragments. The eye protection must be capable of
stopping ying debris generated by various operations.
The dust mask or respirator must be capable of ltrating
particles generated by your operation. Prolonged expo-
sure to high intensity noise may cause hearing loss.
9. Keep bystanders a safe distance away from work
area. Anyone entering the work area must wear
personal protective equipment. Fragments of
workpiece or of a broken accessory may y away and
cause injury beyond immediate area of operation.
10. Hold the power tool by insulated gripping surfaces
only, when performing an operation where the
cutting accessory may contact hidden wiring or its
own cord. Cutting accessory contacting a "live" wire
may make exposed metal parts of the power tool “live”
and could give the operator an electric shock.

4ENGLISH
11. Position the cord clear of the spinning acces-
sory. If you lose control, the cord may be cut or
snagged and your hand or arm may be pulled into
the spinning accessory.
12. Never lay the power tool down until the acces-
sory has come to a complete stop. The spinning
accessory may grab the surface and pull the
power tool out of your control.
13.
Do not run the power tool while carrying it at your
side. Accidental contact with the spinning accessory could
snag your clothing, pulling the accessory into your body.
14. Regularly clean the power tool’s air vents. The
motor’s fan will draw the dust inside the housing
and excessive accumulation of powdered metal
may cause electrical hazards.
15. Do not operate the power tool near ammable
materials. Sparks could ignite these materials.
16. Do not use accessories that require liquid
coolants. Using water or other liquid coolants
may result in electrocution or shock.
Kickback and Related Warnings
Kickback is a sudden reaction to a pinched or snagged
rotating wheel, backing pad, brush or any other acces-
sory. Pinching or snagging causes rapid stalling of the
rotating accessory which in turn causes the uncon-
trolled power tool to be forced in the direction opposite
of the accessory’s rotation at the point of the binding.
For example, if an abrasive wheel is snagged or pinched
by the workpiece, the edge of the wheel that is entering
into the pinch point can dig into the surface of the material
causing the wheel to climb out or kick out. The wheel may
either jump toward or away from the operator, depending on
direction of the wheel’s movement at the point of pinching.
Abrasive wheels may also break under these conditions.
Kickback is the result of power tool misuse and/or
incorrect operating procedures or conditions and can be
avoided by taking proper precautions as given below.
1. Maintain a rm grip on the power tool and
position your body and arm to allow you to
resist kickback forces. Always use auxiliary
handle, if provided, for maximum control over
kickback or torque reaction during start-up.
The operator can control torque reactions or kick-
back forces, if proper precautions are taken.
2. Never place your hand near the rotating acces-
sory. Accessory may kickback over your hand.
3. Do not position your body in the area where
power tool will move if kickback occurs.
Kickback will propel the tool in direction opposite
to the wheel’s movement at the point of snagging.
4. Use special care when working corners, sharp
edges etc. Avoid bouncing and snagging the
accessory. Corners, sharp edges or bouncing
have a tendency to snag the rotating accessory
and cause loss of control or kickback.
5. Do not attach a saw chain woodcarving blade
or toothed saw blade. Such blades create fre-
quent kickback and loss of control.
Safety Warnings Specic for Grinding and Abrasive
Cutting-Off Operations:
1. Use only wheel types that are recommended
for your power tool and the specic guard
designed for the selected wheel. Wheels for
which the power tool was not designed cannot be
adequately guarded and are unsafe.
2.
The grinding surface of centre depressed wheels
must be mounted below the plane of the guard lip.
An improperly mounted wheel that projects through the
plane of the guard lip cannot be adequately protected.
3. The guard must be securely attached to the
power tool and positioned for maximum safety,
so the least amount of wheel is exposed towards
the operator. The guard helps to protect the opera-
tor from broken wheel fragments, accidental contact
with wheel and sparks that could ignite clothing.
4. Wheels must be used only for recommended
applications. For example: do not grind with the
side of cut-off wheel. Abrasive cut-off wheels are
intended for peripheral grinding, side forces applied
to these wheels may cause them to shatter.
5. Always use undamaged wheel anges that are of
correct size and shape for your selected wheel.
Proper wheel anges support the wheel thus reducing
the possibility of wheel breakage. Flanges for cut-off
wheels may be different from grinding wheel anges.
6. Do not use worn down wheels from larger
power tools. Wheel intended for larger power tool
is not suitable for the higher speed of a smaller
tool and may burst.
Additional Safety Warnings Specic for Abrasive
Cutting-Off Operations:
1.
Do not “jam“ the cut-off wheel or apply excessive
pressure. Do not attempt to make an excessive depth
of cut. Overstressing the wheel increases the loading and
susceptibility to twisting or binding of the wheel in the cut
and the possibility of kickback or wheel breakage.
2. Do not position your body in line with and
behind the rotating wheel. When the wheel, at
the point of operation, is moving away from your
body, the possible kickback may propel the spin-
ning wheel and the power tool directly at you.
3. When wheel is binding or when interrupting
a cut for any reason, switch off the power
tool and hold the power tool motionless until
the wheel comes to a complete stop. Never
attempt to remove the cut-off wheel from the
cut while the wheel is in motion otherwise
kickback may occur. Investigate and take correc-
tive action to eliminate the cause of wheel binding.
4.
Do not restart the cutting operation in the work-
piece. Let the wheel reach full speed and carefully
re-enter the cut. The wheel may bind, walk up or
kickback if the power tool is restarted in the workpiece.
5. Support panels or any oversized workpiece to
minimize the risk of wheel pinching and kick-
back. Large workpieces tend to sag under their
own weight. Supports must be placed under the
workpiece near the line of cut and near the edge
of the workpiece on both sides of the wheel.
6. Use extra caution when making a “pocket cut”
into existing walls or other blind areas. The
protruding wheel may cut gas or water pipes, elec-
trical wiring or objects that can cause kickback.
Safety Warnings Specic for Sanding Operations:
1. Do not use excessively oversized sanding
disc paper. Follow manufacturers recommen-
dations, when selecting sanding paper. Larger
sanding paper extending beyond the sanding
pad presents a laceration hazard and may cause
snagging, tearing of the disc or kickback.

5ENGLISH
Safety Warnings Specic for Wire Brushing Operations:
1. Be aware that wire bristles are thrown by the
brush even during ordinary operation. Do not
overstress the wires by applying excessive
load to the brush. The wire bristles can easily
penetrate light clothing and/or skin.
2. If the use of a guard is recommended for wire
brushing, do not allow any interference of the
wire wheel or brush with the guard. Wire wheel
or brush may expand in diameter due to work load
and centrifugal forces.
Additional Safety Warnings:
1.
When using depressed centre grinding wheels,
be sure to use only berglass-reinforced wheels.
2. NEVER USE Stone Cup type wheels with this
grinder. This grinder is not designed for these
types of wheels and the use of such a product
may result in serious personal injury.
3. Be careful not to damage the spindle, the
ange (especially the installing surface) or the
lock nut. Damage to these parts could result in
wheel breakage.
4. Make sure the wheel is not contacting the
workpiece before the switch is turned on.
5. Before using the tool on an actual workpiece,
let it run for a while. Watch for vibration or
wobbling that could indicate poor installation
or a poorly balanced wheel.
6. Use the specied surface of the wheel to per-
form the grinding.
7. Do not leave the tool running. Operate the tool
only when hand-held.
8. Do not touch the workpiece immediately after
operation; it may be extremely hot and could
burn your skin.
9. Observe the instructions of the manufacturer
for correct mounting and use of wheels.
Handle and store wheels with care.
10. Do not use separate reducing bushings or
adaptors to adapt large hole abrasive wheels.
11. Use only anges specied for this tool.
12. For tools intended to be tted with threaded
hole wheel, ensure that the thread in the wheel
is long enough to accept the spindle length.
13.
Check that the workpiece is properly supported.
14. Pay attention that the wheel continues to
rotate after the tool is switched off.
15. If working place is extremely hot and humid,
or badly polluted by conductive dust, use a
short-circuit breaker (30 mA) to assure opera-
tor safety.
16. Do not use the tool on any materials contain-
ing asbestos.
17. When use cut-off wheel, always work with
the dust collecting wheel guard required by
domestic regulation.
18. Cutting discs must not be subjected to any
lateral pressure.
19. Do not use cloth work gloves during operation.
Fibers from cloth gloves may enter the tool, which
causes tool breakage.
SAVE THESE INSTRUCTIONS.
WARNING: DO NOT let comfort or familiarity
with product (gained from repeated use) replace
strict adherence to safety rules for the subject
product. MISUSE or failure to follow the safety
rules stated in this instruction manual may cause
serious personal injury.
FUNCTIONAL
DESCRIPTION
CAUTION:
• Always be sure that the tool is switched off and
unplugged before adjusting or checking function
on the tool.
Shaft lock
1
► 1. 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
1
► 1. Slide switch

6ENGLISH
CAUTION:
• Before plugging in the tool, always check to
see that the slide switch actuates properly and
returns to the "OFF" position when the rear of
the slide switch is depressed.
• Switch can be locked in "ON" position for ease
of operator comfort during extended use. Apply
caution when locking tool in "ON" position and
maintain rm grasp on tool.
To start the tool, slide the slide switch toward the "I
(ON)" position by pushing the rear of the slide switch.
For continuous operation, press the front of the slide
switch to lock it.
To stop the tool, press the rear of the slide switch, then
slide it toward the "O (OFF)" position.
Indication lamp
1
► 1. Indication lamp (speed adjusting dial)
The indication lamp lights up green when the tool is
plugged. If the indication lamp does not light up, the
mains cord or the controller may be defective. The indi-
cation lamp is lit but the tool does not start even if the
tool is switched on, the carbon brushes may be worn
out, or the controller, the motor or the ON/OFF switch
may be defective.
Unintentional restart proof
The tool does not start with the switch being lock-on
even when the tool is plugged.
At this time, the indication lamp ickers red and shows
the unintentional restart proof device is on function.
To cancel the unintentional restart proof, return the slide
switch to "O(OFF)" position.
Speed adjusting dial
1
► 1. Speed adjusting dial
The rotating speed can be changed by turning the
speed adjusting dial to a given number setting from 1
to 5.
Higher speed is obtained when the dial is turned in the
direction of number 5. And lower speed is obtained
when it is turned in the direction of number 1.
Refer to the below table for the relationship between
the number settings on the dial and the approximate
rotating speed.
For Model GA4040C, GA4540C, GA5040C, GA4041C,
GA4541C, GA5041C
Number min-1 (R.P.M.)
1 2,800
2 4,000
3 6,000
4 8,000
5 11,000
For Model GA6040C
Number min-1 (R.P.M.)
1 4,000
2 5,000
3 6,000
4 7,000
5 9,000
CAUTION:
• If the tool is operated continuously at low
speeds for a long time, the motor will get over-
loaded and heated up.
• The speed adjusting dial can be turned only as
far as 5 and back to 1. Do not force it past 5 or
1, or the speed adjusting function may no longer
work.
Electronic function
The tools equipped with electronic function are easy to
operate because of the following features.
Constant speed control
Constant speed control provides ne nish by keeping
the rotating speed constant under the loaded condition.
Soft start feature
Soft start feature suppresses starting shock.

7ENGLISH
Overload protector
When the load on the tool exceeds admissible levels,
power to the motor is reduced to protect the motor from
overheating. When the load returns to admissible lev-
els, the tool will operate as normal.
Mechanical brake
For Model GA4041C, GA4541C, GA5041C
Mechanical brake is activated after the tool is switched
off.
The brake does not work when the power supply is shut
down with the switch still on.
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 gure.
Installing or removing wheel guard
(For depressed center wheel, ap
disc, ex wheel, wire wheel brush
/ abrasive cut-off wheel, diamond
wheel)
WARNING:
• When using a depressed center wheel, ap
disc, ex wheel or wire wheel brush, the wheel
guard must be tted on the tool so that the
closed side of the guard always points toward
the operator.
• When using an abrasive cut-off / diamond
wheel, be sure to use only the special wheel
guard designed for use with cut-off wheels.
For tool with locking screw type
wheel guard
1
23
► 1. Wheel guard 2. Bearing box 3. Screw
Mount the wheel guard with the protrusions on the
wheel guard band aligned with the notches on the bear-
ing box. Then rotate the wheel guard around 180° coun-
terclockwise. Be sure to tighten the screw securely.
To remove wheel guard, follow the installation proce-
dure in reverse.
For tool with clamp lever type wheel
guard
1
2
3
4
► 1. Wheel guard 2. Bearing box 3. Screw 4. Lever
Pull the lever in the direction of the arrow after loosen-
ing the screw. Mount the wheel guard with the protru-
sions on the wheel guard band aligned with the notches
on the bearing box. Then rotate the wheel guard around
180°.
1
2
► 1. Screw 2. Lever

8ENGLISH
Tighten the wheel guard with fastening the screw after
pulling lever in the direction of the arrow. The setting
angle of the wheel guard can be adjusted with the lever.
To remove wheel guard, follow the installation proce-
dure in reverse.
Installing or removing depressed
center wheel or ap disc (optional
accessory)
WARNING:
• When using a depressed center wheel or ap
disc, the wheel guard must be tted on the tool
so that the closed side of the guard always
points toward the operator.
1
2
3
► 1. Lock nut 2. Depressed center wheel 3. Inner
ange
Mount the inner ange onto the spindle. Fit the wheel/
disc on the inner ange and screw the lock nut onto the
spindle.
1
2
► 1. Lock nut wrench 2. Shaft lock
To tighten the lock nut, press the shaft lock rmly 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.
Super ange (Optional accessory)
Models with the letter F are standard-equipped with
Super ange. Only 1/3 of efforts needed to undo lock
nut, compared with conventional type.
CAUTION:
• Do not use super ange for models equipped
with the mechanical brake. Otherwise it may
loosen when the brake is activated.
Installing or removing Ezynut
(optional accessory)
CAUTION:
• Do not use Ezynut with Super Flange or angle
grinder with "F" on the end of the model No.
Those anges are so thick that the entire thread
cannot be retained by the spindle.
1
2
4
3
► 1. Ezynut 2. Abrasive wheel 3. Inner ange
4. Spindle
Mount inner ange, abrasive wheel and Ezynut onto the
spindle so that Makita Logo on Ezynut faces outside.
1
► 1. Shaft lock
Press shaft lock rmly and tighten Ezynut by turning the
abrasive wheel clockwise as far as it turns.
Turn the outside ring of Ezynut counterclockwise to
loosen.

9ENGLISH
12
► 1. Arrow 2. Notch
NOTE:
• Ezynut can be loosened by hand as long as
the arrow points the notch. Otherwise a lock
nut wrench is required to loosen it. Insert one
pin of the wrench into a hole and turn Ezynut
counterclockwise.
Installing or removing ex wheel
(optional accessory)
WARNING:
• Always use supplied guard when ex wheel is
on tool. Wheel can shatter during use and guard
helps to reduce chances of personal injury.
1
2
3
4
► 1. Lock nut 2. Flex wheel 3. Plastic pad 4. Inner
ange
Follow instructions for depressed center wheel but also
use plastic pad over wheel. See order of assembly on
accessories page in this manual.
Installing or removing abrasive disc
(optional accessory)
NOTE:
• Use sander accessories specied in this man-
ual. These must be purchased separately.
1
2
3
► 1. Sanding lock nut 2. Abrasive disc 3. Rubber pad
Mount the rubber pad onto the spindle. Fit the disc on
the rubber pad and screw the sanding lock nut onto the
spindle. To tighten the sanding lock nut, press the shaft
lock rmly so that the spindle cannot revolve, then use
the lock nut wrench and securely tighten clockwise.
To remove the disc, follow the installation procedure in
reverse.
Installing or removing dust cover
attachment (Optional accessory)
WARNING:
• Always be sure that the tool is switched off
and unplugged before installing or removing
the dust cover attachment. Failure to do so
causes damage to the tool or a personal injury.
There are four pieces of dust cover attachment and
each is used in one of different positions.
12
3
4
► 1. Marking A 2. Marking B 3. Marking C
4. Marking D

10 ENGLISH
Set the dust cover attachment so that the marking (A, B,
C or D) places as shown. Snap its pins in the vents.
Dust cover attachment can be removed by hand.
NOTE:
• Clean out the dust cover attachment when it is
clogged with dust or foreign matters. Continuing
operation with a clogged dust cover attachment
will damage the tool.
OPERATION
WARNING:
• It should never be necessary to force the tool.
The weight of the tool applies adequate pres-
sure. 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, espe-
cially when working corners, sharp edges etc.
This can cause loss of control and kickback.
• NEVER use tool with wood cutting blades and
other saw blades. 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
A
B
ALWAYS hold the tool rmly with one hand on housing
and the other on the side handle. Turn the tool on and
then apply the wheel or disc to the workpiece.
In general, keep the edge of the wheel or disc at an
angle of about 15° 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.
Operation with abrasive cut-off /
diamond wheel (optional accessory)
1
2
3
4
► 1. Lock nut 2. Abrasive cut-off wheel/diamond wheel
3. Inner ange 4. Wheel guard for abrasive cut-off
wheel/diamond wheel
The direction for mounting the lock nut and the inner
ange varies by wheel thickness. Refer to the table
below.

11 ENGLISH
Abrasive cut-off wheel Diamond wheel
Thickness: Less than 4 mm (5/32") Thickness: 4 mm (5/32") or more
16 mm (5/8") 20 mm (13/16")
22.23 mm (7/8")
Abrasive cut-off wheel Diamond wheel
Thickness: Less than 4 mm (5/32") Thickness: 4 mm (5/32") or more
Thickness: Less than 4 mm (5/32") Thickness: 4 mm (5/32") or more Thickness: Less than 4 mm (5/32") Thickness: 4 mm (5/32") or more
22.23 mm (7/8") 22.23 mm (7/8") 22.23 mm (7/8")
16 mm (5/8")
20 mm (13/16")
1
2
3
1
4
3
100 mm (4") model
115 mm (4 - 1/2") / 125 mm (5") / 150 mm (6") model
1
2
3
1
4
3
Lock nut Abrasive cut-off wheel Inner flange Diamond wheel1. 2.3.4.
Lock nut Abrasive cut-off wheel Inner flange Diamond wheel1. 2.3.4.
WARNING:
• When using an abrasive cut-off / diamond
wheel, be sure to use only the special wheel
guard designed for use with cut-off wheels. (In
some European countries, when using a dia-
mond wheel, the ordinary guard can be used.
Follow the regulations in your country.)
• NEVER use cut-off wheel for side grinding.
• Do not "jam" the wheel or apply excessive
pressure. Do not attempt to make an excessive
depth of cut. Overstressing the wheel increases
the loading and susceptibility to twisting or
binding of the wheel in the cut and the possibility
of kickback, wheel breakage and overheating of
the motor may occur.
• Do not start the cutting operation in the work-
piece. Let the wheel reach full speed and care-
fully enter into the cut moving the tool forward
over the workpiece surface. The wheel may
bind, walk up or kickback if the power tool is
started in the workpiece.
• During cutting operations, never change the
angle of the wheel. Placing side pressure on
the cut-off wheel (as in grinding) will cause the
wheel to crack and break, causing serious per-
sonal injury.
• A diamond wheel shall be operated perpendicu-
lar to the material being cut.
Operation with wire cup brush
(optional accessory)
CAUTION:
• Check operation of brush by running tool with no
load, insuring that no one is in front of or in line
with brush.
• Do not use brush that is damaged, or which is
out of balance. Use of damaged brush could
increase potential for injury from contact with
broken brush wires.
1
► 1. Wire cup brush

12 ENGLISH
Unplug tool and place it upside down allowing easy
access to spindle. Remove any accessories on spindle.
Thread wire cup brush onto spindle and tighten with
supplied wrench. When using brush, avoid applying too
much pressure which causes over bending of wires,
leading to premature breakage.
Operation with wire wheel brush
(optional accessory)
CAUTION:
• Check operation of wire wheel brush by running
tool with no load, insuring that no one is in front
of or in line with the wire wheel brush.
• Do not use wire wheel brush that is damaged,
or which is out of balance. Use of damaged wire
wheel brush could increase potential for injury
from contact with broken wires.
• ALWAYS use guard with wire wheel brushes,
assuring diameter of wheel ts inside guard.
Wheel can shatter during use and guard helps
to reduce chances of personal injury.
1
► 1. Wire wheel brush
Unplug tool and place it upside down allowing easy
access to spindle. Remove any accessories on spindle.
Thread wire wheel brush onto spindle and tighten with
the wrenches.
When using wire wheel brush, avoid applying too much
pressure which causes over bending of wires, leading
to premature breakage.
MAINTENANCE
CAUTION:
• Always be sure that the tool is switched off and
unplugged before attempting to perform inspec-
tion or maintenance.
• Never use gasoline, benzine, thinner, alcohol
or the like. Discoloration, deformation or cracks
may result.
1
2
► 1. Exhaust vent 2. Inhalation vent
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.
To maintain product SAFETY and RELIABILITY,
repairs, carbon brush inspection and replacement, any
other maintenance or adjustment should be performed
by Makita Authorized Service Centers, always using
Makita replacement parts.
OPTIONAL
ACCESSORIES
CAUTION:
• These accessories or attachments are recom-
mended for use with your Makita tool specied
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 regard-
ing these accessories, ask your local Makita Service
Center.
• Dust cover attachment

13 ENGLISH
2
5
22
11
12
4
3
5
6
7
8
9
10
1
13
3
14
5
3
1
2
3
4
5
6
7
8
9
10
11
12
13
14
-
100 mm (4") model 125 mm (5") model 150 mm (6") model
Grip 36
Wheel Guard (for grinding wheel)
Plastic pad
Flex wheel
Rubber pad 76
Abrasive disc
Wire wheel brush
Plastic pad Plastic pad
Flex wheel Flex wheel
Rubber pad 100 Rubber pad 115 Rubber pad 125
Wire cup brush
Abrasive cut-off wheel/Diamond wheel
Note:
Inner flange Inner flange
Super flange *1
Inner flange
Super flange *1
Inner flange
Super flange *1
Depressed center wheel/Flap disc
Lock nut Lock nut
Ezy nut *2
Lock nut
Ezy nut *2
Lock nut
Ezy nut *2
Sanding lock nut
Wheel Guard (for cut-off wheel) *3
*2 Do not use Super flange and Ezynut together
.
Lock nut wrench
-
-
*3 In some European countries, when using a diamond wheel, the ordinary guard can be used instead of the
special guard covering the both side of the wheel. Follow the regulations in your country.
*1 Do not use Super flange with a grinder equipped with a brake function.
115 mm (4-1/2") model
NOTE:
• Some items in the list may be included in the
tool package as standard accessories. They
may differ from country to country.

14

15

Makita Corporation
www.makita.com
885106D3
EN
20160805