ENGLISH: Original instructions

INSTRUCTION MANUAL

Angle Grinder
GA4030R
GA4530R
GA5030R

DOUBLE INSULATION

Read before use.

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 SPECIFICATIONS
Model: GA4030R GA4530R GA5030R
Wheel diameter 100mm (4″) 115mm (4-1/2″) 125mm (5″)
Max. wheel thickness 6.4mm
Spindle thread M10 M14 or 5/8″ (country specific)
Rated speed (n) 11,000min-1
Overall length 266mm
Net weight 1.7kg 1.8kg
Safety class /II

• Due to our continuing program of research and development, the specifications herein are subject to change
without notice.
• Specifications may differ from country to country.
• Weight according to EPTA-Procedure 01/2003

Symbols Vibration
The following show the symbols used for the equip- The vibration total value (tri-axial vector sum) deter-
ment. Be sure that you understand their meaning before mined according to EN60745:
use. Model GA4030R
Work mode: surface grinding
Read instruction manual.
Vibration emission (ah, AG) : 7.0 m/s2
2
Uncertainty (K) : 1.5 m/s
Work mode: disc sanding
Wear safety glasses.
Vibration emission (ah, DS) : 2.5 m/s2 or less
Uncertainty (K) : 1.5 m/s2
DOUBLE INSULATION Model GA4530R
Work mode: surface grinding
2
Vibration emission (ah, AG) : 7.5 m/s
2
Only for EU countries Uncertainty (K) : 1.5 m/s
Do not dispose of electric equipment Work mode: disc sanding
together with household waste material! In Vibration emission (ah, DS) : 2.5 m/s2 or less
observance of the European Directive, on
Waste Electric and Electronic Equipment
Uncertainty (K) : 1.5 m/s2
and its implementation in accordance with Model GA5030R
national law, electric equipment that have Work mode: surface grinding
reached the end of their life must be col- Vibration emission (ah, AG) : 8.5 m/s2
lected separately and returned to an envi- Uncertainty (K) : 1.5 m/s
2
ronmentally compatible recycling facility.
Work mode: disc sanding
Vibration emission (ah, DS) : 2.5 m/s2 or less
Intended use Uncertainty (K) : 1.5 m/s
2

The tool is intended for grinding, sanding and cutting of NOTE: The declared vibration emission value has
metal and stone materials without the use of water. been measured in accordance with the standard test
method and may be used for comparing one tool with
Power supply another.
NOTE: The declared vibration emission value
The tool should be connected only to a power supply of may also be used in a preliminary assessment of
the same voltage as indicated on the nameplate, and exposure.
can only be operated on single-phase AC supply. They
are double-insulated and can, therefore, also be used
from sockets without earth wire.

Noise
The typical A-weighted noise level determined accord-
ing to EN60745:
Sound pressure level (LpA) : 85 dB(A)
Sound power level (LWA) : 96 dB (A)
Uncertainty (K) : 3 dB(A)

WARNING: Wear ear protection.

2 ENGLISH
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 tools. Unmodified plugs and matching outlets will
WARNING: The vibration emission during actual reduce risk of electric shock.
use of the power tool can differ from the declared 2. Avoid body contact with earthed or grounded
emission value depending on the ways in which the surfaces such as pipes, radiators, ranges and
tool is used. refrigerators. There is an increased risk of elec-
WARNING: Be sure to identify safety measures tric shock if your body is earthed or grounded.
to protect the operator that are based on an estima- 3. Do not expose power tools to rain or wet con-
tion of exposure in the actual conditions of use (taking ditions. Water entering a power tool will increase
account of all parts of the operating cycle such as the risk of electric shock.
the times when the tool is switched off and when it is 4. Do not abuse the cord. Never use the cord for
running idle in addition to the trigger time). carrying, pulling or unplugging the power tool.
WARNING: The declared vibration emission Keep cord away from heat, oil, sharp edges
value is used for main applications of the power tool. or moving parts. Damaged or entangled cords
However if the power tool is used for other applica- increase the risk of electric shock.
tions, the vibration emission value may be different. 5. When operating a power tool outdoors, use an
extension cord suitable for outdoor use. Use of
EC Declaration of Conformity a cord suitable for outdoor use reduces the risk of
electric shock.
For European countries only 6. If operating a power tool in a damp location
Makita declares that the following Machine(s): is unavoidable, use a residual current device
Designation of Machine: Angle Grinder (RCD) protected supply. Use of an RCD reduces
Model No./ Type: GA4030R, GA4530R, GA5030R the risk of electric shock.
Conforms to the following European Directives: 7. Use of power supply via an RCD with a rated
2006/42/EC residual current of 30 mA or less is always
They are manufactured in accordance with the following recommended.
standard or standardized documents: EN60745
The technical file in accordance with 2006/42/EC is Personal Safety
available from: 1. Stay alert, watch what you are doing and use
Makita, Jan-Baptist Vinkstraat 2, 3070, Belgium common sense when operating a power tool.
2.6.2015 Do not use a power tool while you are tired or
under the influence of drugs, alcohol or med-
ication. A moment of inattention while operating
power tools may result in serious personal injury.
2. Use personal protective equipment. Always
Yasushi Fukaya wear eye protection. Protective equipment such
Director as dust mask, non-skid safety shoes, hard hat, or
Makita, Jan-Baptist Vinkstraat 2, 3070, Belgium hearing protection used for appropriate conditions
will reduce personal injuries.
General power tool safety warnings 3. Prevent unintentional starting. Ensure the
switch is in the off-position before connecting
WARNING: Read all safety warnings and to power source and/or battery pack, picking
all instructions. Failure to follow the warnings and up or carrying the tool. Carrying power tools with
instructions may result in electric shock, fire and/or your finger on the switch or energising power tools
serious injury. that have the switch on invites accidents.
4. Remove any adjusting key or wrench before
Save all warnings and instruc- turning the power tool on. A wrench or a key left
attached to a rotating part of the power tool may
tions for future reference. result in personal injury.
The term "power tool" in the warnings refers to your 5. Do not overreach. Keep proper footing and
mains-operated (corded) power tool or battery-operated balance at all times. This enables better control
(cordless) power tool. of the power tool in unexpected situations.
Work area safety 6. Dress properly. Do not wear loose clothing or
1. Keep work area clean and well lit. Cluttered or jewellery. Keep your hair, clothing, and gloves
dark areas invite accidents. away from moving parts. Loose clothes, jewel-
2. Do not operate power tools in explosive atmo- lery or long hair can be caught in moving parts.
spheres, such as in the presence of flammable 7. If devices are provided for the connection of
liquids, gases or dust. Power tools create sparks dust extraction and collection facilities, ensure
which may ignite the dust or fumes. these are connected and properly used. Use of
3. Keep children and bystanders away while dust collection can reduce dust-related hazards.
operating a power tool. Distractions can cause Power tool use and care
you to lose control. 1. Do not force the power tool. Use the correct
Electrical Safety power tool for your application. The correct
1. Power tool plugs must match the outlet. Never power tool will do the job better and safer at the
modify the plug in any way. Do not use any rate for which it was designed.
adapter plugs with earthed (grounded) power
3 ENGLISH
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 2. Do not use the power tool if the switch does 5. The outside diameter and the thickness of your
not turn it on and off. Any power tool that cannot accessory must be within the capacity rating
be controlled with the switch is dangerous and of your power tool. Incorrectly sized accessories
must be repaired. cannot be adequately guarded or controlled.
3. Disconnect the plug from the power source 6. Threaded mounting of accessories must
and/or the battery pack from the power tool match the grinder spindle thread. For acces-
before making any adjustments, changing sories mounted by flanges, the arbour hole of
accessories, or storing power tools. Such pre- the accessory must fit the locating diameter
ventive safety measures reduce the risk of starting of the flange. Accessories that do not match the
the power tool accidentally. mounting hardware of the power tool will run out of
4. Store idle power tools out of the reach of chil- balance, vibrate excessively and may cause loss
dren and do not allow persons unfamiliar with of control.
the power tool or these instructions to operate 7. Do not use a damaged accessory. Before each
the power tool. Power tools are dangerous in the use inspect the accessory such as abrasive
hands of untrained users. wheels for chips and cracks, backing pad for
5. Maintain power tools. Check for misalignment cracks, tear or excess wear, wire brush for
or binding of moving parts, breakage of parts loose or cracked wires. If power tool or acces-
and any other condition that may affect the sory is dropped, inspect for damage or install
power tool’s operation. If damaged, have the an undamaged accessory. After inspecting and
power tool repaired before use. Many accidents installing an accessory, position yourself and
are caused by poorly maintained power tools. bystanders away from the plane of the rotating
6. Keep cutting tools sharp and clean. Properly accessory and run the power tool at maximum
maintained cutting tools with sharp cutting edges no-load speed for one minute. Damaged acces-
are less likely to bind and are easier to control. sories will normally break apart during this test
time.
7. Use the power tool, accessories and tool bits
etc. in accordance with these instructions, tak- 8. Wear personal protective equipment.
ing into account the working conditions and Depending on application, use face shield,
the work to be performed. Use of the power tool safety goggles or safety glasses. As appro-
for operations different from those intended could priate, wear dust mask, hearing protectors,
result in a hazardous situation. gloves and workshop apron capable of stop-
ping small abrasive or workpiece fragments.
Service The eye protection must be capable of stopping
1. Have your power tool serviced by a qualified flying debris generated by various operations.
repair person using only identical replacement The dust mask or respirator must be capable of
parts. This will ensure that the safety of the power filtrating particles generated by your operation.
tool is maintained. Prolonged exposure to high intensity noise may
2. Follow instruction for lubricating and chang- cause hearing loss.
ing accessories. 9. Keep bystanders a safe distance away from
3. Keep handles dry, clean and free from oil and work area. Anyone entering the work area
grease. must wear personal protective equipment.
Fragments of workpiece or of a broken accessory
Grinder safety warnings may fly away and cause injury beyond immediate
area of operation.
Safety Warnings Common for Grinding, Sanding, 10. Hold the power tool by insulated gripping
Wire Brushing, or Abrasive Cutting-Off Operations: surfaces only, when performing an operation
1. This power tool is intended to function as a where the cutting accessory may contact hid-
grinder, sander, wire brush or cut-off tool. den wiring or its own cord. Cutting accessory
Read all safety warnings, instructions, illus- contacting a "live" wire may make exposed metal
trations and specifications provided with this parts of the power tool “live” and could give the
power tool. Failure to follow all instructions listed operator an electric shock.
below may result in electric shock, fire and/or 11. Position the cord clear of the spinning acces-
serious injury. sory. If you lose control, the cord may be cut or
2. Operations such as polishing are not rec- snagged and your hand or arm may be pulled into
ommended to be performed with this power the spinning accessory.
tool. Operations for which the power tool was not 12. Never lay the power tool down until the acces-
designed may create a hazard and cause per- sory has come to a complete stop. The spinning
sonal injury. accessory may grab the surface and pull the
3. Do not use accessories which are not specifi- power tool out of your control.
cally designed and recommended by the tool 13. Do not run the power tool while carrying it at
manufacturer. Just because the accessory can your side. Accidental contact with the spinning
be attached to your power tool, it does not assure accessory could snag your clothing, pulling the
safe operation. accessory into your body.
4. The rated speed of the accessory must be at 14. Regularly clean the power tool’s air vents. The
least equal to the maximum speed marked on motor’s fan will draw the dust inside the housing
the power tool. Accessories running faster than and excessive accumulation of powdered metal
their rated speed can break and fly apart. may cause electrical hazards.
4 ENGLISH
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 15. Do not operate the power tool near flammable the side of cut-off wheel. Abrasive cut-off wheels
materials. Sparks could ignite these materials. are intended for peripheral grinding, side forces
16. Do not use accessories that require liquid applied to these wheels may cause them to
coolants. Using water or other liquid coolants shatter.
may result in electrocution or shock. 5. Always use undamaged wheel flanges that are
Kickback and Related Warnings of correct size and shape for your selected
Kickback is a sudden reaction to a pinched or snagged wheel. Proper wheel flanges support the wheel
rotating wheel, backing pad, brush or any other acces- thus reducing the possibility of wheel breakage.
sory. Pinching or snagging causes rapid stalling of the Flanges for cut-off wheels may be different from
rotating accessory which in turn causes the uncon- grinding wheel flanges.
trolled power tool to be forced in the direction opposite 6. Do not use worn down wheels from larger
of the accessory’s rotation at the point of the binding. power tools. Wheel intended for larger power tool
For example, if an abrasive wheel is snagged or is not suitable for the higher speed of a smaller
pinched by the workpiece, the edge of the wheel that is tool and may burst.
entering into the pinch point can dig into the surface of Additional Safety Warnings Specific for Abrasive
the material causing the wheel to climb out or kick out. Cutting-Off Operations:
The wheel may either jump toward or away from the 1. Do not “jam“ the cut-off wheel or apply exces-
operator, depending on direction of the wheel’s move- sive pressure. Do not attempt to make an
ment at the point of pinching. Abrasive wheels may also excessive depth of cut. Overstressing the wheel
break under these conditions. increases the loading and susceptibility to twisting
Kickback is the result of power tool misuse and/or or binding of the wheel in the cut and the possibil-
incorrect operating procedures or conditions and can be ity of kickback or wheel breakage.
avoided by taking proper precautions as given below.
2. Do not position your body in line with and
1. Maintain a firm grip on the power tool and behind the rotating wheel. When the wheel, at
position your body and arm to allow you to the point of operation, is moving away from your
resist kickback forces. Always use auxiliary body, the possible kickback may propel the spin-
handle, if provided, for maximum control over ning wheel and the power tool directly at you.
kickback or torque reaction during start-up.
3. When wheel is binding or when interrupting
The operator can control torque reactions or kick-
a cut for any reason, switch off the power
back forces, if proper precautions are taken.
tool and hold the power tool motionless until
2. Never place your hand near the rotating acces- the wheel comes to a complete stop. Never
sory. Accessory may kickback over your hand. attempt to remove the cut-off wheel from the
3. Do not position your body in the area where cut while the wheel is in motion otherwise
power tool will move if kickback occurs. kickback may occur. Investigate and take correc-
Kickback will propel the tool in direction opposite tive action to eliminate the cause of wheel binding.
to the wheel’s movement at the point of snagging. 4. Do not restart the cutting operation in the
4. Use special care when working corners, sharp workpiece. Let the wheel reach full speed and
edges etc. Avoid bouncing and snagging the carefully reenter the cut. The wheel may bind,
accessory. Corners, sharp edges or bouncing walk up or kickback if the power tool is restarted in
have a tendency to snag the rotating accessory the workpiece.
and cause loss of control or kickback. 5. Support panels or any oversized workpiece to
5. Do not attach a saw chain woodcarving blade minimize the risk of wheel pinching and kick-
or toothed saw blade. Such blades create fre- back. Large workpieces tend to sag under their
quent kickback and loss of control. own weight. Supports must be placed under the
Safety Warnings Specific for Grinding and Abrasive workpiece near the line of cut and near the edge
Cutting-Off Operations: of the workpiece on both sides of the wheel.
1. Use only wheel types that are recommended 6. Use extra caution when making a “pocket cut”
for your power tool and the specific guard into existing walls or other blind areas. The
designed for the selected wheel. Wheels for protruding wheel may cut gas or water pipes, elec-
which the power tool was not designed cannot be trical wiring or objects that can cause kickback.
adequately guarded and are unsafe. Safety Warnings Specific for Sanding Operations:
2. The grinding surface of centre depressed 1. Do not use excessively oversized sanding
wheels must be mounted below the plane of disc paper. Follow manufacturers recommen-
the guard lip. An improperly mounted wheel that dations, when selecting sanding paper. Larger
projects through the plane of the guard lip cannot sanding paper extending beyond the sanding
be adequately protected. pad presents a laceration hazard and may cause
3. The guard must be securely attached to the snagging, tearing of the disc or kickback.
power tool and positioned for maximum safety, Safety Warnings Specific for Wire Brushing
so the least amount of wheel is exposed Operations:
towards the operator. The guard helps to protect
1. Be aware that wire bristles are thrown by the
the operator from broken wheel fragments, acci-
brush even during ordinary operation. Do not
dental contact with wheel and sparks that could
overstress the wires by applying excessive
ignite clothing.
load to the brush. The wire bristles can easily
4. Wheels must be used only for recommended penetrate light clothing and/or skin.
applications. For example: do not grind with
5 ENGLISH
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 2. If the use of a guard is recommended for wire
brushing, do not allow any interference of the WARNING: DO NOT let comfort or familiarity
wire wheel or brush with the guard. Wire wheel with product (gained from repeated use) replace
or brush may expand in diameter due to work load strict adherence to safety rules for the subject
and centrifugal forces. product. MISUSE or failure to follow the safety
rules stated in this instruction manual may cause
Additional Safety Warnings:
serious personal injury.
1. When using depressed centre grinding wheels,
be sure to use only fiberglass-reinforced
wheels.
2. NEVER USE Stone Cup type wheels with this
grinder. This grinder is not designed for these FUNCTIONAL
types of wheels and the use of such a product
may result in serious personal injury. DESCRIPTION
3. Be careful not to damage the spindle, the
flange (especially the installing surface) or the CAUTION: Always be sure that the tool is
lock nut. Damage to these parts could result in switched off and unplugged before adjusting or
wheel breakage. checking function on the tool.
4. Make sure the wheel is not contacting the
workpiece before the switch is turned on. Shaft lock
5. Before using the tool on an actual workpiece,
let it run for a while. Watch for vibration or Press the shaft lock to prevent spindle rotation when
wobbling that could indicate poor installation installing or removing accessories.
or a poorly balanced wheel.
6. Use the specified surface of the wheel to per-
form the grinding. 1
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 flanges specified for this tool.
12. For tools intended to be fitted with threaded ► 1
 . Shaft lock
hole wheel, ensure that the thread in the wheel
is long enough to accept the spindle length. NOTICE: Never actuate the shaft lock when the
13. Check that the workpiece is properly spindle is moving. The tool may be damaged.
supported.
14. Pay attention that the wheel continues to Switch action
rotate after the tool is switched off.
15. If working place is extremely hot and humid, CAUTION: Before plugging in the tool, always
or badly polluted by conductive dust, use a check to see that the slide switch actuates prop-
short-circuit breaker (30 mA) to assure opera- erly and returns to the "OFF" position when the
tor safety. rear of the slide switch is depressed.
16. Do not use the tool on any materials contain-
ing asbestos. CAUTION: Switch can be locked in "ON" posi-
tion for ease of operator comfort during extended
17. When use cut-off wheel, always work with
use. Apply caution when locking tool in "ON"
the dust collecting wheel guard required by
position and maintain firm grasp on tool.
domestic regulation.
18. Cutting discs must not be subjected to any To start the tool, slide the slide switch toward the “I
lateral pressure. (ON)” position by pushing the rear of the slide switch.
19. Do not use cloth work gloves during operation. For continuous operation, press the front of the slide
Fibers from cloth gloves may enter the tool, which switch to lock it
causes tool breakage. To stop the tool, press the rear of the slide switch, then
slide it toward the “O (OFF)” position.
SAVE THESE INSTRUCTIONS.

6 ENGLISH
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 1 Installing or removing wheel guard
(For depressed center wheel, flap
disc, flex wheel, wire wheel brush
/ abrasive cut-off wheel, diamond
wheel)

WARNING: When using a depressed center

wheel, flap disc, flex wheel or wire wheel brush,
the wheel guard must be fitted on the tool so that
the closed side of the guard always points toward
the operator.
► 1
 . Slide switch 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.
Unintentional restart proof
(In some European countries, when using a diamond
The tool does not start with the switch being lock-on wheel, the ordinary guard can be used. Follow the
even when the tool is plugged. regulations in your country.)
To cancel the unintentional restart proof, return the slide
switch to "O(OFF)" position. For tool with locking screw type
NOTE: Wait more than one second before restarting wheel guard
the tool when unintentional restart proof functions.
Mount the wheel guard with the protrusions on the
NOTE: When the tool is overloaded and the tool wheel guard band aligned with the notches on the bear-
temperature reaches a certain level, the tool may ing box. Then rotate the wheel guard to such an angle
automatically stop. In this situation, let the cool before that it can protect the operator according to work. Be
turning on the tool again. sure to tighten the screw securely.
To remove wheel guard, follow the installation proce-
dure in reverse.
Soft start feature
Soft start feature reduces starting reaction.

ASSEMBLY
CAUTION: Always be sure that the tool is
switched off and unplugged before carrying out 1
any work on the tool.
2
Installing side grip (handle) 3

► 1
 . Wheel guard 2. Bearing box 3. Screw
CAUTION: Always be sure that the side grip is
installed securely before operation.

Screw the side grip securely on the position of the tool For tool with clamp lever type wheel
as shown in the figure. guard
Loosen the screw, and then pull the lever in the direc-
tion of the arrow. 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 to such
an angle that it can protect the operator according to
work.

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 1

2
1 3 4
3

2
4
► 1
 . Wheel guard 2. Bearing box 3. Screw 4. Lever ► 1
 . Lock nut 2. Depressed center wheel 3. Inner
flange 4. Mounting part
Pull the lever in direction of the arrow. Then tighten the
wheel guard with fastening the screw. Be sure to tighten To tighten the lock nut, press the shaft lock firmly so
the screw securely. The setting angle of the wheel that the spindle cannot revolve, then use the lock nut
guard can be adjusted with the lever. wrench and securely tighten clockwise.

2
1 1

► 1
 . Screw 2. Lever ► 1
 . Lock nut wrench 2. Shaft lock

To remove wheel guard, follow the installation proce- To remove the wheel, follow the installation procedure
dure in reverse. in reverse.

Installing or removing depressed Super flange

center wheel or flap disc Optional accessory
Optional accessory Only for tools with M14 spindle thread.
Models with the letter F are standard-equipped with
WARNING: When using a depressed center Super flange. Only 1/3 of efforts needed to undo lock
wheel or flap disc, the wheel guard must be fitted nut, compared with conventional type.
on the tool so that the closed side of the guard
always points toward the operator. Installing or removing flex wheel
CAUTION: Make sure that the mounting part Optional accessory
of the inner flange fits into the inner diameter of
the depressed center wheel / flap disc perfectly. WARNING: Always use supplied guard when
Mounting the inner flange on the wrong side may flex wheel is on tool. Wheel can shatter during use
result in the dangerous vibration. and guard helps to reduce chances of personal injury.

Mount the inner flange onto the spindle.

Make sure to fit the dented part of the inner flange onto
the straight part at the bottom of the spindle.
Fit the depressed center wheel / flap disc on the inner
flange and screw the lock nut onto the spindle.

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 1 OPERATION
2
WARNING: It should never be necessary to
3 force the tool. The weight of the tool applies ade-
quate pressure. Forcing and excessive pressure
4 could cause dangerous wheel breakage.
WARNING: ALWAYS replace wheel if tool is
dropped while grinding.
WARNING: NEVER bang or hit grinding disc
or wheel onto work.
WARNING: Avoid bouncing and snagging
► 1
 . Lock nut 2. Flex wheel 3. Back up pad 4. Inner the wheel, especially when working corners,
flange sharp edges etc. This can cause loss of control and
kickback.
Follow instructions for depressed center wheel but also WARNING: NEVER use tool with wood cutting
use back up pad over wheel. See order of assembly on blades and other saw blades. Such blades when
accessories page in this manual. used on a grinder frequently kick and cause loss of
control leading to personal injury.
Installing or removing abrasive disc
CAUTION: Never switch on the tool when it
Optional accessory
is in contact with the workpiece, it may cause an
injury to operator.
1
CAUTION: Always wear safety goggles or a
2 face shield during operation.
CAUTION: After operation, always switch off
3 the tool and wait until the wheel has come to a
complete stop before putting the tool down.
CAUTION: ALWAYS hold the tool firmly with
one hand on housing and the other on the side
handle.

Grinding and sanding operation

► 1
 . Sanding lock nut 2. Abrasive disc 3. Rubber pad

1. Mount the rubber pad onto the spindle.

2. Fit the disc on the rubber pad and screw the sand-
ing lock nut onto the spindle.
3. Hold the spindle with the shaft lock, and securely
tighten the sanding lock nut clockwise with the lock nut
wrench.
To remove the disc, follow the installation procedure in
reverse.
NOTE: Use sander accessories specified in this man-
ual. These must be purchased separately.

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 forward direction or it may cut into
the workpiece. Once the edge of the wheel has been
rounded off by use, the wheel may be worked in both
forward and backward direction.

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 Operation with abrasive cut-off / For 100 mm (4″) model
diamond wheel When installing the abrasive cut-off wheel:

Optional accessory
1 1
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. 2 3
(In some European countries, when using a diamond
wheel, the ordinary guard can be used. Follow the
regulations in your country.)
WARNING: NEVER use cut-off wheel for side 16 mm (5/8″) 16 mm (5/8″)
grinding. 4 4
WARNING: 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 ► 1
 . Lock nut 2. Abrasive cut-off wheel (Thinner than
or binding of the wheel in the cut and the possibility 4mm (5/32")) 3. Abrasive cut-off wheel (4mm (5/32")
of kickback, wheel breakage and overheating of the or thicker) 4. Inner flange
motor may occur.
When installing the diamond wheel:
WARNING: Do not start the cutting operation
in the workpiece. Let the wheel reach full speed
and carefully enter into the cut moving the tool 1 1
forward over the workpiece surface. The wheel
may bind, walk up or kickback if the power tool is
started in the workpiece. 2 3
WARNING: During cutting operations, never
change the angle of the wheel. Placing side pres-
sure on the cut-off wheel (as in grinding) will cause
the wheel to crack and break, causing serious per-
sonal injury. 4
4
WARNING: A diamond wheel shall be oper-
ated perpendicular to the material being cut.

1 ► 1
 . Lock nut 2. Diamond wheel (Thinner than 4mm
(5/32″)) 3. Diamond wheel (4mm (5/32″) or thicker)
4. Inner flange
2

3 For 115 mm (4 - 1/2″) / 125 mm (5″)

4
model
When installing the abrasive cut-off wheel:

1 1

2 3
► 1
 . Lock nut 2. Abrasive cut-off wheel / diamond
wheel 3. Inner flange 4. Wheel guard for abrasive
cut-off wheel / diamond wheel

As for the installation, follow the instructions for

depressed center wheel. 4 4
The direction for mounting the lock nut and the
inner flange varies by wheel type and thickness.
Refer to the following figures.
► 1
 . Lock nut 2. Abrasive cut-off wheel (Thinner than
4mm (5/32")) 3. Abrasive cut-off wheel (4mm (5/32")
or thicker) 4. Inner flange

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 When installing the diamond wheel:
Operation with wire wheel brush
1 1 Optional accessory

CAUTION: Check operation of wire wheel

2 3 brush by running tool with no load, insuring that
no one is in front of or in line with the wire wheel
brush.
CAUTION: Do not use wire wheel brush that
is damaged, or which is out of balance. Use of
4 4 damaged wire wheel brush could increase potential
for injury from contact with broken wires.
CAUTION: ALWAYS use guard with wire
wheel brushes, assuring diameter of wheel fits
► 1
 . Lock nut 2. Diamond wheel (Thinner than 4mm inside guard. Wheel can shatter during use and
(5/32″)) 3. Diamond wheel (4mm (5/32″) or thicker) guard helps to reduce chances of personal injury.
4. Inner flange

Operation with wire cup brush 1

Optional accessory

CAUTION: Check operation of brush by run-

ning tool with no load, insuring that no one is in
front of or in line with brush.
CAUTION: 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
 . Wire wheel brush

Unplug tool and place it upside down allowing easy

1 access to spindle.
Remove any accessories on spindle. Thread wire wheel
brush onto spindle and tighten with the wrenches.
NOTICE: Avoid applying too much pressure
which causes over bending of wires when
using wire wheel brush. It may lead to premature
breakage.

► 1
 . Wire cup brush MAINTENANCE
Unplug tool and place it upside down allowing easy CAUTION: Always be sure that the tool is
access to spindle. switched off and unplugged before attempting to
Remove any accessories on spindle. Thread wire cup perform inspection or maintenance.
brush onto spindle and tighten with supplied wrench.
NOTICE: Avoid applying too much pressure NOTICE: Never use gasoline, benzine, thinner,
which causes over bending of wires when using alcohol or the like. Discoloration, deformation or
brush. It may lead to premature breakage. cracks may result.

Air vent cleaning

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.

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 1

► 1
 . Exhaust vent 2. Inhalation vent

To maintain product SAFETY and RELIABILITY,

repairs, any other maintenance or adjustment should
be performed by Makita Authorized or Factory Service
Centers, always using Makita replacement parts.

OPTIONAL ACCESSORIES
CAUTION: These accessories or attachments are recommended for use with your Makita tool spec-
ified 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.

2 2 8 2 12 13

3 3 9 11 3
6 10
4 14
7 5
5
5

- 100 mm (4″) model 115 mm (4-1/2″) model 125 mm (5″) model

1 Grip 36
2 Wheel Guard (for grinding wheel)
3 Inner flange Inner flange / Super flange
4 Depressed center wheel / Flap disc
5 Lock nut
6 Back up pad
7 Flex wheel

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 - 100 mm (4″) model 115 mm (4-1/2″) model 125 mm (5″) model
8 Rubber pad 76 Rubber pad 100 Rubber pad 115
9 Abrasive disc
10 Sanding lock nut
11 Wire wheel brush
12 Wire cup brush
13 Wheel Guard (for cut-off wheel) *1
14 Abrasive cut-off wheel / Diamond wheel
- Lock nut wrench

NOTE: *1 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.
NOTE: Some items in the list may be included in the tool package as standard accessories. They may differ from
country to country.

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 14
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 15
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 Makita Jan-Baptist Vinkstraat 2, 3070, Belgium
Makita Corporation Anjo, Aichi, Japan
885462-227
EN
www.makita.com 20150731

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