Makita GA4590 User manual

GA4590
GA4591
GA4592
GA5090
GA5091
GA5092
EN Angle Grinder INSTRUCTION MANUAL 8
FR Meuleuse d’Angle MANUEL D’INSTRUCTIONS 21
DE Winkelschleifer BETRIEBSANLEITUNG 35
IT Smerigliatrice angolare ISTRUZIONI PER L’USO 49
NL Haakse slijpmachine GEBRUIKSAANWIJZING 63
ES Esmeriladora Angular MANUAL DE
INSTRUCCIONES 77
PT Esmerilhadeira Angular MANUAL DE INSTRUÇÕ ES 91
DA Vinkelsliber BRUGSANVISNING 105
EL Γωνιακός λειαντήρας ΕΓΕΙΙΔΙ ΔΗΓΙΝ 118
TR Taşlama Maknası KULLANMA KILAVUZU 132

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8ENGLISH
ENGLISH (Original instructions)
SPECIFICATIONS
Model: GA4590 GA4591 GA4592 GA5090 GA5091 GA5092
A p p l i c a b l e g r i n d i n g w h e e l M a x . w h e e l d i a m e t e r 115 m m 125 m m
M a x . w h e e l t h i c k n e s s 7.2 m m
Applicable cut-o󰀨 wheel M a x . w h e e l d i a m e t e r 115 m m 125 m m
M a x . w h e e l t h i c k n e s s 3 .2 m m
A p p l i c a b l e w i r e w h e e l b r u s h M a x . w h e e l d i a m e t e r 115 m m 125 m m
M a x . w h e e l t h i c k n e s s 20 m m
S p i n d l e t h r e a d M1 or 5/8(country specic)
M a x . s p i n d l e l e n g t h 23 m m
No load speed (n0) / Rated speed (n) 11, 500 m i n -1
O v e r a l l l e n g t h 3 26 m m 3 4 9 m m 3 26 m m 3 4 9 m m 3 26 m m
N e t w e i g h t 2.6 -
3 .8 k g
2.8 -
4 .0 k g
2.6 - 3 .8 k g 2.8 -
4 .0 k g
2.6 -
3 .8 k g
Safety class / II
Due to our continuing program of research and development, the specications herein are subject to change
w i t h o u t n o t i c e .
Specications may di󰀨er from country to country.
The weight may di󰀨er depending on the attachment(s). The lightest and heaviest combination, according to
EP T A -P r o c e d u r e 01/ 2014 , a r e s h o w n i n t h e t a b l e .
Symbols
The followings show the symbols which may be used
for the equipment. Be sure that you understand their
m e a n i n g b e f o r e u s e .
Read instruction manual.
Wear safety glasses.
Always operate with two hands.
Do not use the wheel guard for cut-o󰀨
operations.
DO U B L E IN S U L A T IO N
Only for EU countries
Du e t o t h e p r e s e n c e o f h a z a r d o u s c o m p o -
n e n t s i n t h e e q u i p m e n t , u s e d e l e c t r i c a l a n d
electronic equipment may have a negative
i m p a c t o n t h e e n v i r o n m e n t a n d h u m a n
health.
Do n o t d i s p o s e o f e l e c t r i c a l a n d e l e c t r o n i c
a p p l i a n c e s w i t h h o u s e h o l d w a s t e !
In a c c o r d a n c e w i t h t h e Eu r o p e a n Di r e c t i v e
o n w a s t e e l e c t r i c a l a n d e l e c t r o n i c e q u i p -
m e n t a n d i t s a d a p t a t i o n t o n a t i o n a l l a w ,
u s e d e l e c t r i c a l a n d e l e c t r o n i c e q u i p m e n t
should be collected separately and
d e l i v e r e d t o a s e p a r a t e c o l l e c t i o n p o i n t
f o r m u n i c i p a l w a s t e , o p e r a t i n g i n a c c o r -
d a n c e w i t h t h e e n v i r o n m e n t a l p r o t e c t i o n
r e g u l a t i o n s .
This is indicated by the symbol of the
c r o s s e d -o u t w h e e l e d b i n p l a c e d o n t h e
equipm ent.
Intended use
T h e t o o l i s i n t e n d e d f o r g r i n d i n g , s a n d i n g , w i r e b r u s h -
i n g , h o l e c u t t i n g a n d c u t t i n g o f m e t a l a n d s t o n e m a t e r i -
a l s w i t h o u t t h e u s e o f w a t e r .
Pow er supply
The tool should be connected only to a power supply of
t h e s a m e v o l t a g e a s i n d i c a t e d o n t h e n a m e p l a t e , a n d
can only be operated on single-phase AC supply. They
a r e d o u b l e -i n s u l a t e d a n d c a n , t h e r e f o r e , a l s o b e u s e d
f r o m s o c k e t s w i t h o u t e a r t h w i r e .

9ENGLISH
Noise
The typical A-weighted noise level determined according to EN81--:
Model Sound pressure
level (LpA) : (dB(A))
Sound pow er level
(LWA) : (dB(A))
Uncertainty (K) :
(dB(A))
G A 4 590 93 101 3
G A 4 591 90 98 3
G A 4 592 93 101 3
G A 5090 93 101 3
G A 5091 90 98 3
G A 5092 93 101 3
NOTE: The declared noise emission value(s) has been measured in accordance with a standard test method and
may be used for comparing one tool with another.
NOTE: The declared noise emission value(s) may also be used in a preliminary assessment of exposure.
WARNING: Wear ear protection.
WARNING: The noise emission during actual use of the power tool can di󰀨er from the declared al-
ue(s) depending on the w ays in w hich the tool is used especially w hat kind of w orkpiece is processed.
WARNING: Be sure to identify safety measures to protect the operator that are based on an estimation
of exposure in the actual conditions of use (taking account of all parts of the operating cycle such as the
times when the tool is switched o󰀨 and when it is running idle in addition to the trigger time.
WARNING: Grinding thin sheets of metal or other easily vibrating structures w ith a large surface can
result in a total noise emission much higher (up to 15 dB) than the declared noise emission values.
Set heay exible damping mats or such to those workpieces to preent them from emitting sound.
Take the increased noise emission into consideration for both the risk assessment of noise exposure and
selecting adequate hearing protection.
Vibration
The vibration total value (tri-axial vector sum) determined according to EN81--:
Work mode: surface grinding w ith normal side grip
Model Vibration emission (ah, AG) : (m/s2) Uncertainty (K) : (m/s2)
G A 4 590 4 .7 1.5
G A 4 591 5.4 1.5
G A 4 592 4 .7 1.5
G A 5090 7.9 1.5
G A 5091 7.4 1.5
G A 5092 7.9 1.5
Work mode: surface grinding w ith anti vibration side grip
Model Vibration emission (ah, AG) : (m/s2) Uncertainty (K) : (m/s2)
G A 4 590 4 .9 1.5
G A 4 591 5.2 1.5
G A 4 592 4 .9 1.5
G A 5090 8.8 1.5
G A 5091 8.7 1.5
G A 5092 8.8 1.5

10 ENGLISH
Work mode: disc sanding w ith normal side grip
Model Vibration emission (ah, DS) : (m/s2) Uncertainty (K) : (m/s2)
G A 4 590 3 .6 1.5
G A 4 591 3 .2 1.5
G A 4 592 3 .6 1.5
G A 5090 2.7 1.5
G A 5091 2.7 1.5
G A 5092 2.7 1.5
Work mode: disc sanding w ith anti vibration side grip
Model Vibration emission (ah, DS) : (m/s2) Uncertainty (K) : (m/s2)
G A 4 590 3 .5 1.5
G A 4 591 2.9 1.5
G A 4 592 3 .5 1.5
G A 5090 2.8 1.5
G A 5091 3 .0 1.5
G A 5092 2.8 1.5
NOTE: The declared vibration total value(s) has been measured in accordance with a standard test method and
may be used for comparing one tool with another.
NOTE: The declared vibration total value(s) may also be used in a preliminary assessment of exposure.
WARNING: The ibration emission during actual use of the power tool can di󰀨er from the declared
value(s) depending on the w ays in w hich the tool is used especially w hat kind of w orkpiece is processed.
WARNING: Be sure to identify safety measures to protect the operator that are based on an estimation
of exposure in the actual conditions of use (taking account of all parts of the operating cycle such as the
times when the tool is switched o󰀨 and when it is running idle in addition to the trigger time.
WARNING: T h e d e c l a r e d v i b r a t i o n e m i s s i o n v a l u e i s u s e d f o r m a i n a p p l i c a t i o n s o f t h e p o w e r t o o l . H o w e v e r i f
the power tool is used for other applications, the vibration emission value may be di󰀨erent.
EC Declaration of Conformity
For European countries only
The EC declaration of conformity is included as Annex A
t o t h i s i n s t r u c t i o n m a n u a l .
SAFETY WARNINGS
General pow er tool safety w arnings
WARNING: Read all safety w arnings, instruc-
tions, illustrations and specications proided
w ith this pow er tool. F a i l u r e t o f o l l o w a l l i n s t r u c t i o n s
listed below may result in electric shock, re and/or
serious injury.
Save all w arnings 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.
Grinder safety w arnings
Safety w arnings common for grinding, sanding,
wire brushing, or cutting-o󰀨 operations:
1. This pow er tool is intended to function as a
grinder, sander, w ire brush, hole cutter or cut-
o󰀨 tool. Read all safety warnings, instructions,
illustrations and specications proided with
this pow er tool. F a i l u r e t o f o l l o w a l l i n s t r u c t i o n s
listed below may result in electric shock, re and/
or serious injury.
2. Operations such as polishing are not to be
performed w ith this pow er tool. O p e r a t i o n s f o r
which the power tool was not designed may create
a hazard and cause personal injury.
3 . Do not convert this pow er tool to operate in
a way which is not specically designed and
specied by the tool manufacturer. S u c h a c o n -
version may result in a loss of control and cause
serious personal injury.
4 . Do not use accessories w hich are not spe-
cically designed and specied by the tool
manufacturer. Just because the accessory can
be attached to your power tool, it does not assure
s a f e o p e r a t i o n .
5. The rated speed of the accessory must be at
least equal to the maximum speed marked on
the pow er tool. A c c e s s o r i e s r u n n i n g f a s t e r t h a n
their rated speed can break and y apart.

11 ENGLISH
6 . The outside diameter and the thickness of your
accessory must be w ithin the capacity rating
of your pow er tool. Incorrectly sized accessories
cannot be adequately guarded or controlled.
7.
The dimensions of the accessory mounting must
t the dimensions of the mounting hardware of the
pow er tool. A c c e s s o r i e s t h a t d o n o t m a t c h t h e m o u n t -
i n g h a r d w a r e o f t h e p o w e r t o o l w i l l r u n o u t o f b a l a n c e ,
vibrate excessively and may cause loss of control.
8. Do not use a damaged accessory. Before each use
inspect the accessory such as abrasive w heels for
chips and cracks, backing pad for cracks, tear or
excess w ear, w ire brush for loose or cracked w ires.
If pow er tool or accessory is dropped, inspect for
damage or install an undamaged accessory. After
inspecting and installing an accessory, position
yourself and bystanders aw ay from the plane of the
rotating accessory and run the pow er tool at maxi-
mum no-load speed for one minute. Da m a g e d a c c e s -
sories will normally break apart during this test time.
9. Wear personal protective equipment.
Depending on application, use face shield,
safety goggles or safety glasses. As appro-
priate, w ear dust mask, hearing protectors,
gloves and w orkshop apron capable of stop-
ping small abrasive or w orkpiece fragments.
The eye protection must be capable of stopping
ying debris generated by various applications.
T h e d u s t m a s k o r r e s p i r a t o r m u s t b e c a p a b l e
of ltrating particles generated by the particular
application. Prolonged exposure to high intensity
noise may cause hearing loss.
10.
Keep bystanders a safe distance aw ay from w ork
area. Anyone entering the w ork area must w ear
personal protective equipment. F r a g m e n t s o f
workpiece or of a broken accessory may y away and
cause injury beyond immediate area of operation.
11. Hold the pow er tool by insulated gripping
surfaces only, w hen performing an operation
w here the cutting accessory may contact hid-
den w iring or its ow n cord. Cutting accessory
contacting a live wire may make exposed metal
p a r t s o f t h e p o w e r t o o l " l i v e " a n d c o u l d g i v e t h e
o p e r a t o r a n e l e c t r i c s h o c k .
12. 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.
13 . Never lay the pow er tool dow n until the acces-
sory has come to a complete stop. T h e s p i n n i n g
accessory may grab the surface and pull the
power tool out of your control.
14 . Do not run the pow er tool w hile carrying it at
your side. A c c i d e n t a l c o n t a c t w i t h t h e s p i n n i n g
accessory could snag your clothing, pulling the
accessory into your body.
15. Regularly clean the pow er tool’s air vents. T h e
m o t o r ’ s f a n w i l l d r a w t h e d u s t i n s i d e t h e h o u s i n g
a n d e x c e s s i v e a c c u m u l a t i o n o f p o w d e r e d m e t a l
may cause electrical hazards.
16 . Do not operate the power tool near ammable
materials. S p a r k s c o u l d i g n i t e t h e s e m a t e r i a l s .
17. Do not use accessories that require liquid
coolants. U s i n g w a t e r o r o t h e r l i q u i d c o o l a n t s
may result in electrocution or shock.
Kickback and related w arnings:
K i c k b a c k i s a s u d d e n r e a c t i o n t o a p i n c h e d o r s n a g g e d
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-
t r o l l e d p o w e r t o o l t o b e f o r c e d i n t h e d i r e c t i o n o p p o s i t e
of the accessory’s rotation at the point of the binding.
F o r e x a m p l e , i f a n a b r a s i v e w h e e l i s s n a g g e d o r
pinched by the workpiece, the edge of the wheel that is
e n t e r i n g i n t o t h e p i n c h p o i n t c a n d i g i n t o t h e s u r f a c e o f
t h e m a t e r i a l c a u s i n g t h e w h e e l t o c l i m b o u t o r k i c k o u t .
The wheel may either jump toward or away from the
o p e r a t o r , d e p e n d i n g o n d i r e c t i o n o f t h e w h e e l ’ s m o v e -
ment at the point of pinching. Abrasive wheels may also
b r e a k u n d e r t h e s e c o n d i t i o n s .
K i c k b a c k i s t h e r e s u l t o f p o w e r t o o l m i s u s e a n d / o r
i n c o r r e c t o p e r a t i n g p r o c e d u r e s o r c o n d i t i o n s a n d c a n b e
avoided by taking proper precautions as given below.
1.
Maintain a rm grip with both hands on the
pow er tool and position your body and arms
to allow you to resist kickback forces. Alw ays
use auxiliary handle, if provided, for maximum
control over kickback or torque reaction during
start-up. T h e o p e r a t o r c a n c o n t r o l t o r q u e r e a c t i o n s
o r k i c k b a c k f o r c e s , i f p r o p e r p r e c a u t i o n s a r e t a k e n .
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 w here
pow er tool w ill move if kickback occurs.
K i c k b a c k w i l l p r o p e l t h e t o o l i n d i r e c t i o n o p p o s i t e
t o t h e w h e e l ’ s m o v e m e n t a t t h e p o i n t o f s n a g g i n g .
4 . Use special care w hen w orking corners, sharp
edges, etc. Avoid bouncing and snagging the
accessory. Corners, sharp edges or bouncing
have a tendency to snag the rotating accessory
a n d c a u s e l o s s o f c o n t r o l o r k i c k b a c k .
5. Do not attach a saw chain w oodcarving blade,
segmented diamond w heel w ith a peripheral
gap greater than 10 mm or toothed saw blade.
S u c h b l a d e s c r e a t e f r e q u e n t k i c k b a c k a n d l o s s o f
c o n t r o l .
Safety warnings specic for grinding and cut-
ting-o󰀨 operations:
1. Use only wheel types that are specied
for your power tool and the specic guard
designed for the selected w heel. W h e e l s f o r
w h i c h t h e p o w e r t o o l w a s n o t d e s i g n e d c a n n o t b e
adequately guarded and are unsafe.
2. The grinding surface of centre depressed
w heels 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
pow er tool and positioned for maximum safety,
so the least amount of w heel is exposed tow ards
the operator. T h e g u a r d h e l p s t o p r o t e c t t h e o p e r a -
t o r f r o m b r o k e n w h e e l f r a g m e n t s , a c c i d e n t a l c o n t a c t
w i t h w h e e l a n d s p a r k s t h a t c o u l d i g n i t e c l o t h i n g .
4 . Wheels must be used only for specied appli-
cations. For example: do not grind w ith the
side of cut-o󰀨 wheel. Abrasive cut-o󰀨 wheels
a r e i n t e n d e d f o r p e r i p h e r a l g r i n d i n g , s i d e f o r c e s
applied to these wheels may cause them to
s h a t t e r .

12 ENGLISH
5.
Always use undamaged wheel anges that are of
correct size and shape for your selected w heel.
Proper wheel anges support the wheel thus reducing
the possibility of wheel breakage. Flanges for cut-o󰀨
wheels may be di󰀨erent from grinding wheel anges.
6 . Do not use w orn dow n w heels from larger
pow er tools. A w h e e l i n t e n d e d f o r l a r g e r p o w e r
t o o l i s n o t s u i t a b l e f o r t h e h i g h e r s p e e d o f a
smaller tool and may burst.
7. When using dual purpose w heels alw ays use
the correct guard for the application being
performed. Failure to use the correct guard may
n o t p r o v i d e t h e d e s i r e d l e v e l o f g u a r d i n g , w h i c h
could lead to serious injury.
Additional safety warnings specic for cutting-o󰀨
operations:
1. Do not jam the cut-o󰀨 wheel or apply exces-
sive pressure. Do not attempt to make an
excessive depth of cut. O v e r s t r e s s i n g t h e w h e e l
increases the loading and susceptibility to twisting
o r b i n d i n g o f t h e w h e e l i n t h e c u t a n d t h e p o s s i b i l -
ity of kickback or wheel breakage.
2. Do not position your body in line w ith and
behind the rotating w heel. W h e n t h e w h e e l , a t
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 the w heel is binding or w hen interrupt-
ing a cut for any reason, switch o󰀨 the power
tool and hold it motionless until the w heel
comes to a complete stop. Never attempt to
remoe the cut-o󰀨 wheel from the cut while
the w heel is in motion otherw ise kickback may
occur. In v e s t i g a t e a n d t a k e c o r r e c t i v e a c t i o n t o
e l i m i n a t e t h e c a u s e o f w h e e l b i n d i n g .
4 .
Do not restart the cutting operation in the w ork-
piece. Let the w heel reach full speed and carefully
re-enter the cut. The wheel may bind, walk up or
k i c k b a c k i f t h e p o w e r t o o l i s r e s t a r t e d i n t h e w o r k p i e c e .
5. Support panels or any oversized w orkpiece to
minimize the risk of w heel pinching and kick-
back. L a r g e w o r k p i e c e s t e n d t o s a g u n d e r t h e i r
o w n w e i g h t . S u p p o r t s m u s t b e p l a c e d u n d e r t h e
w o r k p i e c e n e a r t h e l i n e o f c u t a n d n e a r t h e e d g e
o f t h e w o r k p i e c e o n b o t h s i d e s o f t h e w h e e l .
6 . Use extra caution w hen making a “ pocket cut”
into existing w alls or other blind areas. T h e
protruding wheel may cut gas or water pipes, elec-
trical wiring or objects that can cause kickback.
7. Do not attempt to do curved cutting.
O v e r s t r e s s i n g t h e w h e e l i n c r e a s e s t h e l o a d i n g a n d
susceptibility to twisting or binding of the wheel
in the cut and the possibility of kickback or wheel
breakage, which can lead to serious injury.
8. Before using a segmented diamond w heel,
make sure that the diamond w heel has the
peripheral gap betw een segments of 10 mm or
less, only w ith a negative rake angle.
Safety warnings specic for sanding operations:
1. Use proper sized sanding disc paper. Follow
manufacturers recommendations, w hen
selecting sanding paper. Largersanding paper
extending too far beyond the sanding pad pres-
ents a laceration hazard and may cause snagging,
t e a r i n g o f t h e d i s c o r k i c k b a c k .
Safety warnings specic for wire brushing
operations:
1. Be aw are that w ire bristles are throw n by the
brush even during ordinary operation. Do not
overstress the w ires by applying excessive
load to the brush. The wire bristles can easily
p e n e t r a t e l i g h t c l o t h i n g a n d / o r s k i n .
2. If the use of a guard is specied for wire
brushing, do not allow any interference of the
w ire w heel or brush w ith the guard. W i r e w h e e l
or brush may expand in diameter due to work load
a n d c e n t r i f u g a l f o r c e s .
Additional Safety Warnings:
1. When using depressed centre grinding w heels,
be sure to use only berglass-reinforced
w heels.
2. NEVER USE Stone Cup type w heels w ith this
grinder. T h i s g r i n d e r i s n o t d e s i g n e d f o r t h e s e
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
w heel breakage.
4 . Make sure the w heel is not contacting the
w orkpiece before the sw itch is turned on.
5. Before using the tool on an actual w orkpiece,
let it run for a w hile. Watch for vibration or
w obbling that could indicate poor installation
or a poorly balanced w heel.
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 w hen hand-held.
8. Do not touch the w orkpiece immediately after
operation; it may be extremely hot and could
burn your skin.
9. Do not touch accessories immediately after
operation; it may be extremely hot and could
burn your skin.
10. Observe the instructions of the manufacturer
for correct mounting and use of w heels.
Handle and store w heels w ith care.
11. Do not use separate reducing bushings or
adaptors to adapt large hole abrasive w heels.
12. Use only anges specied for this tool.
13 . or tools intended to be tted with threaded
hole w heel, ensure that the thread in the w heel
is long enough to accept the spindle length.
14 .
Check that the w orkpiece is properly supported.
15. Pay attention that the w heel continues to
rotate after the tool is switched o󰀨.
16 . If w orking place is extremely hot and humid,
or badly polluted by conductive dust, use a
short-circuit breaker (30 mA) to assure opera-
tor safety.
17. Do not use the tool on any materials contain-
ing asbestos.
18. When use cut-o󰀨 wheel, always work with
the dust collecting w heel guard if required by
domestic regulation.
19. Cutting discs must not be subjected to any
lateral pressure.

13 ENGLISH
20. Do not use cloth w ork gloves during operation.
Fibers from cloth gloves may enter the tool, which
c a u s e s t o o l b r e a k a g e .
21. Before operation, make sure that there is no
buried object such as electric pipe, w ater pipe
or gas pipe in the w orkpiece. Otherwise, it may
c a u s e a n e l e c t r i c s h o c k , e l e c t r i c a l l e a k a g e o r g a s
l e a k .
22. If a blotter is attached to the w heel, do not
remove it. The diameter of the blotter must be
larger than the lock nut, outer ange, and inner
ange.
23 . Before installing a grinding w heel, alw ays
check that the blotter part does not have any
abnormalities such as chips or cracks.
24 . Tighten the lock nut properly. O v e r t i g h t e n i n g
the wheel can cause breakage and insu󰀩cient
tightening can cause uttering.
SAVE THESE INSTRUCTIONS.
WARNING: DO NOT let comfort or familiarity
w ith 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: Alw ays be sure that the tool is
switched o󰀨 and unplugged before adjusting or
checking function on the tool.
Tool protection system
The tool is equipped with a tool protection system. This
system automatically reduces or cuts o󰀨 power to the
motor to extend tool life. The tool will automatically
r e d u c e p o w e r o r s t o p d u r i n g o p e r a t i o n i f t h e t o o l i s
placed under one of the following conditions:
Overload protection
W h e n t h e t o o l i s o p e r a t e d i n a m a n n e r t h a t c a u s e s i t
to draw an abnormally high current, the tool reduces
power automatically without any indication. In this
s i t u a t i o n , r e m o v e t h e c a u s e o f t h e o v e r l o a d s o t h a t t h e
r o t a t i o n s p e e d r e c o v e r e d .
Overheat protection

W h e n t h e t o o l i s o v e r h e a t e d , t h e t o o l s t o p s a u t o m a t -
ically and the indication lamp blinks in red. In this
s i t u a t i o n , l e t t h e t o o l c o o l d o w n . Y o u c a n t u r n t h e t o o l
o n a g a i n a f t e r t h e l a m p c h a n g e s t h e c o l o r f r o m r e d t o
green.
Indication lamp
 Fig.1: 1. In d i c a t i o n l a m p
T h e i n d i c a t i o n l a m p l i g h t s u p g r e e n w h e n t h e t o o l i s
plugged.
If t h e i n d i c a t i o n l a m p b l i n k s i n r e d , t h e o v e r h e a t p r o -
tection, Active Feedback sensing Technology, or the
a c c i d e n t a l r e -s t a r t p r e v e n t i v e f u n c t i o n s t o p s o p e r a t i o n .
In this situation, switch o󰀨 the tool. Then, turn the tool
o n t o r e s t a r t .
If the indication lamp lights up in red after switch o󰀨 the
t o o l , t h e t o o l i s o v e r h e a t e d . In t h i s s i t u a t i o n , c o o l d o w n
t h e t o o l a n d w a i t u n t i l t h e i n d i c a t i o n l a m p l i g h t s u p i n
green.
Speed adjusting dial
Only for model GA4590 / GA4591 / GA5090 / GA5091
CAUTION: If the tool is operated continuously
at low speeds for a long time, the motor w ill get
overloaded and heated up.
CAUTION: 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 w ork.
The rotating speed can be changed by turning the
speed adjusting dial to a given number setting from 1 to
5. H i g h e r s p e e d i s o b t a i n e d w h e n t h e d i a l i s t u r n e d i n
t h e d i r e c t i o n o f n u m b e r 5. A n d l o w e r s p e e d i s o b t a i n e d
when it is turned in the direction of number 1. Refer to
t h e b e l o w t a b l e f o r t h e r e l a t i o n s h i p b e t w e e n t h e n u m b e r
s e t t i n g s o n t h e d i a l a n d t h e a p p r o x i m a t e r o t a t i n g s p e e d .
Number Rated speed
12, 800 m i n -1 (/min)
24 , 500 m i n -1 (/min)
36 , 500 m i n -1 (/min)
48, 000 m i n -1 (/min)
511, 500 m i n -1 (/min)
 Fig.2: 1. Speed adjusting dial
Shaft lock
WARNING: Never actuate the shaft lock w hen
the spindle is moving. It may cause serious injury or
t h e t o o l d a m a g e .
P r e s s t h e s h a f t l o c k t o p r e v e n t s p i n d l e r o t a t i o n w h e n
i n s t a l l i n g o r r e m o v i n g a c c e s s o r i e s .
 Fig.3: 1. S h a f t l o c k

14 ENGLISH
Sw itch action
CAUTION: Before plugging in the tool, alw ays
check to see that the slide sw itch actuates prop-
erly and returns to the " OFF" position w hen the
rear end of the slide sw itch is depressed.
CAUTION: Sw itch can be locked in the " ON"
position for ease of operator comfort during
extended use. Apply caution w hen locking tool in
the ON position and maintain rm grasp on tool.
T o s t a r t t h e t o o l , p r e s s d o w n t h e r e a r e n d o f t h e s l i d e
switch and then slide it toward the I (ON) position.
F o r c o n t i n u o u s o p e r a t i o n , p r e s s d o w n t h e f r o n t e n d o f
t h e s l i d e s w i t c h t o l o c k i t .
 Fig.4: 1. S l i d e s w i t c h
T o s t o p t h e t o o l , p r e s s d o w n t h e r e a r e n d o f t h e s l i d e
switch so that it returns to the O (OFF) position.
 Fig.5: 1. S l i d e s w i t c h
Electronic function
Active Feedback sensing Technology
CAUTION: Hold the tool rmly until the rota-
tion stops.
The tool electronically detects situations where the
wheel or accessory may be at risk to be bound. In such
situation, the tool automatically shuts o󰀨 the power to
prevent further rotation of the spindle (this does not
prevent kickback).
A t t h i s t i m e , t h e i n d i c a t i o n l a m p b l i n k s i n r e d a n d s h o w s
the Active Feedback sensing Technology is working.
To restart the tool, switch o󰀨 the tool rst, remove the
c a u s e o f s u d d e n d r o p i n t h e r o t a t i o n s p e e d , a n d t h e n
t u r n t h e t o o l o n .
Accidental re-start preventive
function
W h e n p l u g g i n g i n t h e t o o l w h i l e t h e s w i t c h i s O N , t h e
t o o l d o e s n o t s t a r t .
A t t h i s t i m e , t h e i n d i c a t i o n l a m p b l i n k s i n r e d a n d s h o w s
t h a t t h e a c c i d e n t a l r e -s t a r t p r e v e n t i v e f u n c t i o n w o r k s .
To start the tool, turn o󰀨 the switch, and turn it on again.
Constant speed control
Possible to get ne nish, because the rotating speed is
k e p t c o n s t a n t e v e n u n d e r t h e l o a d e d c o n d i t i o n .
Soft start feature
S o f t s t a r t f e a t u r e r e d u c e s s t a r t i n g r e a c t i o n .
Mechanical brake
Only for model GA4591 / GA5091
M e c h a n i c a l b r a k e i s a c t i v a t e d a f t e r t h e t o o l i s s w i t c h e d
o󰀨.
The brake does not work when the power supply is shut
d o w n w i t h t h e s w i t c h s t i l l o n .
ASSEMBLY
CAUTION: Alw ays be sure that the tool is
switched o󰀨 and unplugged before carrying out
any w ork on the tool.
Installing side grip (handle)
CAUTION: Alw ays 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.
 Fig.6
Installing or removing w heel guard
WARNING: When using a depressed center w heel,
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 alw ays points tow ard the operator.
WARNING: Make sure that the w heel guard is
securely locked by the lock lever w ith one of the
holes on the w heel guard.
WARNING: When using an abrasie cut-o󰀨
/ diamond w heel, be sure to use only the special
wheel guard designed for use with cut-o󰀨 wheels.
or depressed center wheel, ap disc,
ex wheel, wire wheel brush / abrasie
cut-o󰀨 wheel, diamond wheel
1. W h i l e p u s h i n g t h e l o c k l e v e r , m o u n t t h e w h e e l
g u a r d w i t h t h e p r o t r u s i o n s o n t h e w h e e l g u a r d a l i g n e d
w i t h t h e n o t c h e s o n t h e b e a r i n g b o x .
 Fig.7: 1. L o c k l e v e r 2. N o t c h 3. P r o t r u s i o n
2.
W h i l e p u s h i n g t h e l o c k l e v e r t o w a r d A , h o l d d o w n
the portions B of the wheel guard as shown in the gure.
 Fig.8: 1. W h e e l g u a r d 2. H o l e
NOTE: P u s h d o w n t h e w h e e l g u a r d s t r a i g h t .
Otherwise, you cannot secure the wheel guard.
3. W h i l e p u s h i n g t h e l o c k l e v e r t o w a r d A , r o t a t e t h e w h e e l
guard toward C, and then, change the angle of the wheel
g u a r d a c c o r d i n g t o t h e w o r k s o t h a t t h e o p e r a t o r c a n b e p r o -
t e c t e d . A l i g n t h e l o c k l e v e r w i t h o n e o f t h e h o l e s i n t h e w h e e l
g u a r d , a n d t h e n r e l e a s e t h e l o c k l e v e r t o l o c k t h e w h e e l g u a r d .
 Fig.9: 1. W h e e l g u a r d 2. H o l e
T o r e m o v e w h e e l g u a r d , f o l l o w t h e i n s t a l l a t i o n p r o c e -
d u r e i n r e v e r s e .
Clip-on cutting w heel guard attachment
Optional accessory
NOTE: For cutting-o󰀨 operations, a clip-on cutting
w h e e l g u a r d a t t a c h m e n t c a n b e u s e d w i t h t h e w h e e l
guard (for grinding wheel).
N o t a v a i l a b l e i n s o m e c o u n t r i e s .
 Fig.10

15 ENGLISH
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
alw ays points tow ard the operator.
WARNING: Make sure that the mounting part
of the inner ange ts into the inner diameter of
the depressed center wheel / ap disc perfectly.
Mounting the inner ange on the wrong side may
r e s u l t i n t h e d a n g e r o u s v i b r a t i o n .
Mount the inner ange onto the spindle.
Make sure to t the dented part of the inner ange onto
t h e s t r a i g h t p a r t a t t h e b o t t o m o f t h e s p i n d l e .
Fit the depressed center wheel / ap disc on the inner
ange and screw the lock nut onto the spindle.
 Fig.11: 1. L o c k n u t 2. De p r e s s e d c e n t e r w h e e l
3. Inner ange 4. M o u n t i n g p a r t
To tighten the lock nut, press the shaft lock rmly so
t h a t t h e s p i n d l e c a n n o t r e v o l v e , t h e n u s e t h e l o c k n u t
wrench and securely tighten clockwise.
 Fig.12: 1. L o c k n u t w r e n c h 2. S h a f t l o c k
T o r e m o v e t h e w h e e l , f o l l o w t h e i n s t a l l a t i o n p r o c e d u r e
i n r e v e r s e .
Installing or remoing ex wheel
Optional accessory
WARNING: Alw ays use supplied guard w hen
ex wheel is on the tool. W h e e l c a n s h a t t e r d u r i n g
u s e a n d g u a r d h e l p s t o r e d u c e c h a n c e s o f p e r s o n a l
injury.
 Fig.13: 1. L o c k n u t 2. F l e x w h e e l 3. B a c k u p p a d
4. Inner ange
F o l l o w i n s t r u c t i o n s f o r d e p r e s s e d c e n t e r w h e e l b u t a l s o
u s e b a c k u p p a d o v e r w h e e l .
Installing or removing abrasive disc
Optional accessory
 Fig.14: 1. S a n d i n g l o c k n u t 2. A b r a s i v e d i s c
3. Rubber pad
1. M o u n t t h e r u b b e r p a d o n t o t h e s p i n d l e .
2. F i t t h e d i s c o n t h e r u b b e r p a d a n d s c r e w t h e s a n d -
i n g l o c k n u t o n t o t h e s p i n d l e .
3. Hold the spindle with the shaft lock, and securely
t i g h t e n t h e s a n d i n g l o c k n u t c l o c k w i s e w i t h t h e l o c k n u t
w r e n c h .
T o r e m o v e t h e d i s c , f o l l o w t h e i n s t a l l a t i o n p r o c e d u r e i n
r e v e r s e .
NOTE: Use sander accessories specied in this man-
ual. These must be purchased separately.
Super ange
Optional accessory
Only for model GA4590 / GA4592 / GA5090 / GA5092
Super ange is a special accessory for model which is
N O T e q u i p p e d w i t h a b r a k e f u n c t i o n .
Only 1/ of e󰀨orts needed to undo lock nut, compared
with conventional type.
Installing or removing Ezynut
Optional accessory
Only for tools with M14 spindle thread.
CAUTION: Do not use Ezynut w ith Super
lange. Those anges are so thick that the entire
thread cannot be retained by the spindle.
Mount inner ange, abrasive wheel and Ezynut onto the
spindle so that Makita Logo on Ezynut faces outside.
 Fig.15: 1. Ezynut 2. A b r a s i v e w h e e l 3. Inner ange
4. S p i n d l e
Press shaft lock rmly and tighten Ezynut by turning the
a b r a s i v e w h e e l c l o c k w i s e a s f a r a s i t t u r n s .
 Fig.16: 1. S h a f t l o c k
To loosen the Ezynut, turn the outside ring of Ezynut
c o u n t e r c l o c k w i s e .
NOTE: Ezynut can be loosened by hand as long
a s t h e a r r o w p o i n t s t h e n o t c h . O t h e r w i s e a l o c k n u t
w r e n c h i s r e q u i r e d t o l o o s e n i t . In s e r t o n e p i n o f t h e
wrench into a hole and turn Ezynut counterclockwise.
 Fig.17: 1. A r r o w 2. N o t c h
 Fig.18
Installing abrasie cut-o󰀨 / diamond
w heel
Optional accessory
WARNING: When using an abrasie cut-o󰀨
/ diamond w heel, be sure to use only the special
wheel guard designed for use with cut-o󰀨 wheels.
WARNING: NEVER use cut-o󰀨 wheel for side
grinding.
 Fig.19: 1. L o c k n u t 2. Abrasive cut-o󰀨 wheel / dia-
m o n d w h e e l 3. Inner ange 4. W h e e l g u a r d
for abrasive cut-o󰀨 wheel / diamond wheel
A s f o r t h e i n s t a l l a t i o n , f o l l o w t h e i n s t r u c t i o n s f o r
d e p r e s s e d c e n t e r w h e e l .
T h e d i r e c t i o n f o r m o u n t i n g t h e l o c k n u t a n d t h e i n n e r
ange varies by wheel type and thickness.
Refer to the following gures.
When installing the abrasie cut-o󰀨 wheel:
 Fig.20: 1. L o c k n u t 2. Abrasive cut-o󰀨 wheel
(Thinner than  mm (5/)) 3. A b r a s i v e c u t -
o󰀨 wheel ( mm (5/) or thicker) 4. In n e r
ange
When installing the diamond w heel:
 Fig.21: 1. L o c k n u t 2. Diamond wheel (Thinner than
 mm (5/)) 3. Diamond wheel ( mm
(5/) or thicker) 4. Inner ange

16 ENGLISH
Installing w ire cup brush
Optional accessory
CAUTION: Do not use brush that is damaged,
or w hich is out of balance. U s e o f d a m a g e d b r u s h
could increase potential for injury from contact with
b r o k e n b r u s h w i r e s .
Place the tool upside down to allow easy access to the
s p i n d l e .
Remove any accessories on spindle. Thread wire cup
b r u s h o n t o s p i n d l e a n d t i g h t e n w i t h s u p p l i e d w r e n c h .
 Fig.22: 1. W i r e c u p b r u s h
Installing w ire w heel brush
Optional accessory
CAUTION: Do not use w ire w heel brush that
is damaged, or w hich is out of balance. U s e o f
d a m a g e d w i r e w h e e l b r u s h c o u l d i n c r e a s e p o t e n t i a l
for injury from contact with broken wires.
CAUTION: ALWAYS use guard w ith w ire
wheel brushes, assuring diameter of wheel ts
inside guard. W h e e l c a n s h a t t e r d u r i n g u s e a n d
guard helps to reduce chances of personal injury.
Place the tool upside down to allow easy access to the
s p i n d l e .
Remove any accessories on spindle. Thread wire wheel
b r u s h o n t o s p i n d l e a n d t i g h t e n w i t h t h e w r e n c h e s .
 Fig.23: 1. W i r e w h e e l b r u s h
Installing hole cutter
Optional accessory
Place the tool upside down to allow easy access to the
s p i n d l e .
Remove any accessories on the spindle. Thread the
h o l e c u t t e r o n t o t h e s p i n d l e , a n d t i g h t e n i t w i t h t h e s u p -
p l i e d w r e n c h .
 Fig.24: 1. H o l e c u t t e r
Installing dust collecting w heel
guard for grinding
Optional accessory
With optional accessories, you can use this tool for
p l a n i n g c o n c r e t e s u r f a c e .
CAUTION: Dust collecting w heel guard for
grinding is only for use in planing concrete sur-
face w ith a cup-type diamond w heel. Do not use
this guard w ith any other cutting accessory or for
any other purpose.
CAUTION: Before operation, make sure that
a vacuum cleaner is connected to the tool and
turned on.
P l a c e t h e t o o l u p s i d e d o w n a n d i n s t a l l t h e d u s t c o l l e c t -
i n g w h e e l g u a r d .
Mount the inner ange onto the spindle.
Fit the cup-type diamond wheel on the inner ange and
t i g h t e n t h e l o c k n u t o n t o t h e s p i n d l e .
 Fig.25: 1. L o c k n u t 2. Cup-type diamond wheel
3. Hubbed cup-type diamond wheel 4. In n e r
ange 5. Du s t c o l l e c t i n g w h e e l g u a r d
6. B e a r i n g b o x
NOTE: F o r i n f o r m a t i o n h o w t o i n s t a l l t h e d u s t c o l -
l e c t i n g w h e e l g u a r d , r e f e r t o t h e m a n u a l o f t h e d u s t
c o l l e c t i n g w h e e l g u a r d .
Installing dust collecting w heel
guard for cutting-o󰀨
Optional accessory
With optional accessories, you can use this tool for
c u t t i n g s t o n e m a t e r i a l s .
 Fig.26
NOTE: F o r i n f o r m a t i o n h o w t o i n s t a l l t h e d u s t c o l -
l e c t i n g w h e e l g u a r d , r e f e r t o t h e m a n u a l o f t h e d u s t
c o l l e c t i n g w h e e l g u a r d .
Connecting a vacuum cleaner
Optional accessory
WARNING: Never vacuum metal particles
created by grinding/cutting/sanding operation.
Metal particles created by such operation are so hot
that they ignite dust and the lter inside the vacuum
c l e a n e r .
To avoid dusty environment caused by masonry cut-
t i n g , u s e a d u s t c o l l e c t i n g w h e e l g u a r d a n d a v a c u u m
c l e a n e r .
Refer to the instruction manual attached to the dust
c o l l e c t i n g w h e e l g u a r d f o r a s s e m b l i n g a n d u s i n g i t .
 Fig.27: 1. Du s t c o l l e c t i n g w h e e l g u a r d 2. H o s e o f
t h e v a c u u m c l e a n e r
Installing or removing dust cover
attachment
Optional accessory
CAUTION: Alw ays be sure that the tool is
switched o󰀨 and unplugged before installing or
removing the dust cover attachment. F a i l u r e t o d o
so causes damage to the tool or a personal injury.
Install the dust cover attachment to each specied
p o s i t i o n .
F o r d e t a i l s , r e f e r t o t h e i n s t r u c t i o n m a n u a l o f t h e d u s t
c o v e r a t t a c h m e n t .
NOTICE: Clean out the dust cover attachment
w hen it is clogged w ith dust or foreign matters.
Continuing operation with a clogged dust cover
a t t a c h m e n t w i l l d a m a g e t h e t o o l .

17 ENGLISH
OPERATION
WARNING: It should never be necessary to
force the tool. T h e w e i g h t o f t h e t o o l a p p l i e s a d e -
q u a t e p r e s s u r e . F o r c i n g a n d e x c e s s i v e p r e s s u r e
c o u l d c a u s e d a n g e r o u s w h e e l b r e a k a g e .
WARNING: ALWAYS replace w heel if tool is
dropped w hile grinding.
WARNING: NEVER hit the w orkpiece w ith the
w heel.
WARNING: Avoid bouncing and snagging
the w heel, especially w hen w orking corners,
sharp edges etc. T h i s c a n c a u s e l o s s o f c o n t r o l a n d
k i c k b a c k .
WARNING: NEVER use tool w ith w ood cutting
blades and other saw blades. S u c h b l a d e s w h e n
used on a grinder frequently kick and cause loss of
control leading to personal injury.
WARNING: Continued use of a w orn-out
w heel may result in w heel explosion and serious
personal injury.
CAUTION: Never sw itch on the tool w hen it
is in contact w ith the w orkpiece, it may cause an
injury to operator.
CAUTION: Alw ays w ear safety goggles or a
face shield during operation.
CAUTION: After operation, always switch o󰀨
the tool and w ait until the w heel has come to a
complete stop before putting the tool dow n.
CAUTION: ALWAYS hold the tool rmly with
one hand on housing and the other on the side
grip (handle).
NOTE: A d u a l p u r p o s e w h e e l c a n b e u s e d f o r b o t h
grinding and cutting-o󰀨 operations.
Refer to the Operation with wheel/disc for grinding
o p e r a t i o n , a n d r e f e r t o t h e " O p e r a t i o n w i t h a b r a s i v e
cut-o󰀨 / diamond wheel for cutting-o󰀨 operation.
Operation w ith w heel/disc
 Fig.28
Turn the tool on and then apply the wheel or disc to the
w o r k p i e c e .
In g e n e r a l , k e e p t h e e d g e o f t h e w h e e l o r d i s c a t a n
a n g l e o f a b o u t 15° t o t h e w o r k p i e c e s u r f a c e .
Du r i n g t h e b r e a k -i n p e r i o d w i t h a n e w w h e e l , d o n o t
work the grinder in forward direction or it may cut into
t h e w o r k p i e c e . O n c e t h e e d g e o f t h e w h e e l h a s b e e n
rounded o󰀨 by use, the wheel may be worked in both
f o r w a r d a n d b a c k w a r d d i r e c t i o n .
Operation with abrasie cut-o󰀨 /
diamond w heel
Optional accessory
WARNING: Do not " jam" the w heel or apply
excessive pressure. Do not attempt to make an
excessive depth of cut. O v e r s t r e s s i n g t h e w h e e l
increases the loading and susceptibility to twisting
or binding of the wheel in the cut and the possibility
o f k i c k b a c k , w h e e l b r e a k a g e a n d o v e r h e a t i n g o f t h e
motor may occur.
WARNING: Do not start the cutting operation
in the w orkpiece. Let the w heel reach full speed
and carefully enter into the cut moving the tool
forw ard over the w orkpiece surface. T h e w h e e l
may bind, walk up or kickback if the power tool is
s t a r t e d i n t h e w o r k p i e c e .
WARNING: During cutting operations, never
change the angle of the w heel. P l a c i n g s i d e p r e s -
sure on the cut-o󰀨 wheel (as in grinding) will cause
t h e w h e e l t o c r a c k a n d b r e a k , c a u s i n g s e r i o u s p e r -
sonal injury.
WARNING: A diamond w heel shall be oper-
ated perpendicular to the material being cut.
Usage example: operation with abrasie cut-o󰀨
w heel
 Fig.29
Usage example: operation w ith diamond w heel
 Fig.30
Operation w ith w ire cup brush
Optional accessory
CAUTION: Check operation of brush by run-
ning tool w ith no load, insuring that no one is in
front of or in line w ith brush.
Usage example: operation w ith w ire cup brush
 Fig.31
NOTICE: Avoid applying too much pressure
w hich causes over bending of w ires w hen using
brush. It may lead to premature breakage.
Operation w ith w ire w heel brush
Optional accessory
CAUTION: Check operation of w ire w heel
brush by running tool w ith no load, insuring that
no one is in front of or in line w ith the w ire w heel
brush.
Usage example: operation w ith w ire w heel brush
 Fig.32
NOTICE: Avoid applying too much pressure
w hich causes over bending of w ires w hen
using w ire w heel brush. It may lead to premature
breakage.

18 ENGLISH
Operation w ith hole cutter
Optional accessory
CAUTION: Check operation of the hole cutter
by running the tool w ith no load, insuring that no
one is in front of the hole cutter.
NOTICE: Do not tilt the tool during operation. It
may lead to premature breakage.
Usage example: operation w ith hole cutter
 Fig.33
MAINTENANCE
CAUTION: Alw ays be sure that the tool is
switched o󰀨 and unplugged before attempting to
perform inspection or maintenance.
NOTICE: Never use gasoline, benzine, thinner,
alcohol or the like. Discoloration, deformation or
cracks may result.
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.
Air vent cleaning
T h e t o o l a n d i t s a i r v e n t s h a v e t o b e k e p t c l e a n .
Regularly clean the tools air vents or whenever the
v e n t s s t a r t t o b e c o m e o b s t r u c t e d .
 Fig.34: 1. Ex h a u s t v e n t 2. In h a l a t i o n v e n t

19 ENGLISH
COMBINATION OF APPLICATIONS AND
ACCESSORIES
Optional accessory
CAUTION: Using the tool w ith incorrect guards can cause risks as follow s.
•When using a cut-o󰀨 wheel guard for facial grinding, the wheel guard may interfere with the work-
piece causing poor control.
•When using a grinding wheel guard for cutting-o󰀨 operations with bonded abrasie wheels and dia-
mond w heels, there is an increased risk of exposure to rotating w heels, emitted sparks and particles,
as w ell as exposure to w heel fragments in the event of w heel burst.
•When using a cut-o󰀨 wheel guard or grinding wheel guard for facial operations with cup-type dia-
mond w heels, the w heel guard may interfere w ith the w orkpiece causing poor control.
•When using a cut-o󰀨 wheel guard or grinding wheel guard with a wheel-type wire brush with a thick-
ness greater than the maximum thickness as specied in SPECIICATIONS, the wires may catch on
the guard leading to breaking of w ires.
•Use of dust collecting wheel guards for cutting-o󰀨 and facial operations in concrete or masonry
reduces a risk of exposure to dust.
•When using dual purpose combined grinding and cutting-o󰀨 abrasie ange mounted wheels, only
use a cut-o󰀨 wheel guard.
 Fig.35
Only for model GA4590 / GA4592 / GA5090 / GA5092
-Application  mm 4-/2 model 2 mm  model
1 - S i d e g r i p
2 - Wheel Guard (for grinding wheel)
3 - Inner ange / Super ange 1
4G r i n d i n g / S a n d i n g De p r e s s e d c e n t e r w h e e l / F l a p d i s c
5 - L o c k n u t
6 - Ezynut 1
7 - B a c k u p p a d
8G r i n d i n g / S a n d i n g F l e x w h e e l
9 - Rubber pad 1 Rubber pad 115
10 S a n d i n g A b r a s i v e d i s c
11 -S a n d i n g l o c k n u t
12 W i r e b r u s h i n g W i r e w h e e l b r u s h
13 W i r e b r u s h i n g W i r e c u p b r u s h
14 H o l e c u t t i n g H o l e c u t t e r
15 -Wheel Guard (for cut-o󰀨 wheel)
16 Cutting-o󰀨 Abrasive cut-o󰀨 wheel / Diamond wheel
17 Grinding / Cutting-o󰀨 Du a l p u r p o s e w h e e l
18 -Clip-on cutting wheel guard attachment 
19 -Dust collecting wheel guard for cutting-o󰀨
20 Cutting-o󰀨 Di a m o n d w h e e l
21 -Du s t c o l l e c t i n g w h e e l g u a r d f o r g r i n d i n g
22 G r i n d i n g Cup-type diamond wheel
- - L o c k n u t w r e n c h
- - Du s t c o v e r a t t a c h m e n t

20 ENGLISH
Only for model GA4591 / GA5091
-Application  mm 4-/2 model 2 mm  model
1 - S i d e g r i p
2 - Wheel Guard (for grinding wheel)
3 - Inner ange
4G r i n d i n g / S a n d i n g De p r e s s e d c e n t e r w h e e l / F l a p d i s c
5 - L o c k n u t
6 - Ezynut 1
7 - B a c k u p p a d
8G r i n d i n g / S a n d i n g F l e x w h e e l
9 - Rubber pad 1 Rubber pad 115
10 S a n d i n g A b r a s i v e d i s c
11 -S a n d i n g l o c k n u t
12 W i r e b r u s h i n g W i r e w h e e l b r u s h
13 W i r e b r u s h i n g W i r e c u p b r u s h
14 H o l e c u t t i n g H o l e c u t t e r
15 -Wheel Guard (for cut-o󰀨 wheel)
16 Cutting-o󰀨 Abrasive cut-o󰀨 wheel / Diamond wheel
17 Grinding / Cutting-o󰀨 Du a l p u r p o s e w h e e l
18 -Clip-on cutting wheel guard attachment 
19 -Dust collecting wheel guard for cutting-o󰀨
20 Cutting-o󰀨 Di a m o n d w h e e l
21 -Du s t c o l l e c t i n g w h e e l g u a r d f o r g r i n d i n g
22 G r i n d i n g Cup-type diamond wheel
- - L o c k n u t w r e n c h
- - Du s t c o v e r a t t a c h m e n t
NOTE: 1 Do not use Super ange and Ezynut together.
NOTE:  Only for tools with M1 spindle thread.
NOTE:  Clip-on cutting wheel guard attachment is not available in some countries. For more details, refer to the
i n s t r u c t i o n m a n u a l o f t h e c l i p -o n c u t t i n g w h e e l g u a r d a t t a c h m e n t .
NOTE: Do not use Super ange with a grinder equipped with a brake function.
OPTIONAL
ACCESSORIES
CAUTION: These accessories or attachments
are recommended for use w ith your Makita tool
specied in this manual. The use of any other
a c c e s s o r i e s o r a t t a c h m e n t s m i g h t p r e s e n t a r i s k o f
injury to persons. Only use accessory or attachment
f o r i t s s t a t e d p u r p o s e .
If you need any assistance for more details regard-
ing these accessories, ask your local Makita Service
Center.
Accessories listed in COMBINATION OF
APPLICATIONS AND ACCESSORIES
NOTE: Some items in the list may be included in the
tool package as standard accessories. They may
di󰀨er from country to country.