Makita GA5000 User manual

125mm(5”) MODEL GAS000
Continuous
rating
(Input)
INSTRUCTION MANUAL
Disc Grinder & Standard Equipment
Overall Power Spindle
speed length
Net weight supply cord thread
No load
@ Tool body
@ Grip
@) Depressedcenter wheel
Lock nut wrench
Specifications
278 mm 2.5 kg 2.5 m
850 W R/min. I (11”) ~ (5.51bs) 1 (8.2ft.l , 1 5/8-11UNC
~~
Manufacturer reserves the right tochange specifications of parts and accessories without notice.
Note: Specifications of parts and accessories may vary from country tocountry.

IMPORTANT SAFETY INSTRUCTIONS
WARNING: When usingelectric tools, basic safety precautions shouldalways be followed
toreduce the risk of fire, electricshock, and personal injury, includingthe following:
READ ALL INSTRUCTIONS.
1. KEEP WORK AREA CLEAN. Clutteredareas and benches invite injuries.
2. CONSIDER WORK AREA ENVIRONMENT. Don't use power tools indamp or wet
locations. Keep work area well
lit.
Don't expose power toolstorain. Don't use tool
inpresenceof flammable liquidsor gases.
3. KEEP CHILDRENAWAY. All visitors should be kept away from work area. Don't
let visitors contacttool or extensioncord.
4. STORE IDLE TOOLS. When not in use, tools should be stored indry, and highor
locked-upplace
- out of reachof children.
5. DON'T FORCE TOOL. It will do the job better and safer at the rate for which it
was intended.
6. USE RIGHT TOOL. Don't force small tool or attachmentto do the job of a heavy-
duty tool. Don't use tool for purpose not intended.
7. DRESS PROPERLY. Don't wear
loose clothing or jewelry. They can be caught in
moving parts. Rubber gloves and non-skidfootwear
are recommendedwhen working
outdoors. Wear protectivehair coveringto containlonghair.
8. USE SAFETY GLASSES. Also use face or dust mask if cutting operation is dusty.
9. DON'T ABUSE CORD. Never carry tool by cord or yank it todisconnect from re-
10. SECURE WORK. Use clampsor a vise to holdwork. It's safer than using your hand
11. DON'T OVERREACH. Keep properfooting and balance at all times.
12. MAINTAIN TOOLS WITH CARE. Keep tools sharp and clean for better and safer
performance. Follow instructionsfor lubricating and charging accessories. Inspect
tool cords periodically and
if damaged, have repaired by authorized service facility.
Keep handles dry, clean, and free from oiland grease.
13. DISCONNECT TOOLS. When not inuse, beforeservicing, and when changing acces-
sories, such
as blades, bits, cutters.
14. REMOVE ADJUSTING KEYS AND WRENCHES. Form habit of checking to see
that keys and adjustingwrenches are removedfrom tool beforeturning it on.
15. AVOID UNINTENTIONALSTARTING. Don't carry plugged-intool with finger on
switch. Be sure switch
is OFF when plugging in.
16. OUTDOOR USE EXTENTION CORDS. When tool is used outdoors, use only exten-
sion cords intendedfor use outdoorsand so marked.
17. STAY ALERT. Watch what you are doing, use common sense. Don't operate tool
when you are tired.
18. CHECK DAMAGED PARTS. Before further use of the tool, a guard or other part
that
is damaged should be carefullychecked to determinethat it will operate proper-
ly and perform its intended function. Check for alignment of moving parts, binding
of moving parts, breakage of parts, mounting, and other conditions that may affect
its operation. A guard or other part that is damagedshouldbe properly repaired or
ceptacle. Keep cordfrom heat, oil, and sharp edges.
and
it frees both hands tooperate tool.
2

replaced by an authorized service center unless otherwise indicatedelsewhere inthis
instruction manual. Have defective switches replaced
by authorized service center.
Don't
use tool ifswitch does notturn it on and off.
19. Keep guards inplace.
20. Use only grinding wheels having a maximum operating speed at least as high as "No
Load RPM" markedonthe
tool's nameplate.
21. GUARD AGAINST ELECTRIC SHOCK. Prevent body contact with grounded sur-
faces. Forexample; pipes, radiators, ranges, refrigerator enclosures.
22. REPLACEMENTPARTS. When servicing, use only identicalreplacementparts.
SAVE THESE INSTRUCTIONS.
VOLTAGE WARNING: Before connecting the tool to a power source (receptacle,outlet, etc.) be sure
the voltage supplied is the same as that specified on the nameplate of the tool. A power source with
voltagegreater thanthat specifiedfor the tool can result in
SERIOUS INJURYto the user - as well as
damage to the tool. If in doubt,
DO NOT PLUG IN THE TOOL. Using a power source with voltage
less than the nameplate rating is harmful to the motor.
How to use
Switch action
There
is a slide switch on the motor housing. Slide the button in the ON or OFF direction
as desired.
Push forward to start, the buttonwill lock inthe
"ON" position. To stop, press down on
back of the button.
Installingthe depressed center wheel
Unplugthe tool from the power source and
perform the following steps:
1. Place the inner flange on the spindle.
2. Fit the depressed center wheel over the
3. Screw the lock nutonto the spindle.
flange.
4. To tighten the wheel lock nut, lock the
shaft in place by depressing with your
index finger the pin on the lower front
of the tool
so that it cannot rotate, then
use the lock nut wrench and tighten
firmly inclockwise direction.
Lack nut
-.. .. ~
I
I
Inner flange
3

Operation
0 In general, keep the edge of-thedepressed
center wheel
at an angle of about 15O in
relation tothe workpiece surface.
.During the break-in period with a new
grinding wheel, do not work the grinder
in the B direction or
it will cut into the
material. Once the edge of the wheel has
been rounded off by use, the wheel may
be worked inboth A and Bdirections.
.Check for cracks inthe depressed center wheel and for loose or missingscrews.
.Always use the guard.
It can preventan accident if a wheel should ever break.
0 Choose a wheel grit interms of the workpiece material.
.Before usingthe disc grinder onan actualworkpiece,
let it simply runfor several minutes
first. Watch for flutter that might be.caused by poor installation or
a poorly balanced
wheel.
.Bring
the depressed center wheel intogentle contact with the work surface. Do not bear
down
as this will slow the wheel revolution, make for a poor finish, and the loadon the
motor will cause unduewear.
Grip
The grip can be installedon either side of the tool, whichever is convenient.
(Change the cap screw onthe right side to the left, if usingthe grip on the right side).
Maintenance
Carbon brushes
Replace carbon brushes when they wear
down to about
6 mm (1/4") or sparking
will occur. Both brushesshould be changed
at the same time.
4

Optional accessories
CAUTION:The use of any other accessories not specified in this manual might be hazardous.
Size Imm)
125x6~ 22
(5") (1/4") (7/8fe)
0 Depressedcenter wheels
Wheels
Grit Part
No. per pkg
24 741407-8 1
0 Lock nut (For abrasive disc)
120 742076-8
0 Abrasive discs (1 0 per pkg)
Dia. 125 mm (5")
Grit I Part No
24 I 742072-6
30 I 742073-4
50 I 742074-2
80 I 742075-0
Size
I Part NO. I Spindle thread
5/8-48
1 224517-1 I 518"
0 Rubber pad
Part No.
74301 5- 1
Size
5

I 125mm(5") DISC GRINDER
Model GA5000
,=7\ -/A
[, - .'\Y\ I
0-
6

'iiM DESCRIPTION ':EM &!ib DESCRIPTION
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
4
1
1
1
1
1
1
1
1
1
1
1
1
2
4
2
1
1
2
2
4
1
1
2
1
1
2
1
1
P H Screw M4x25 (With Washer)
Cap Screw M12x12
RetainingRing S-8
Spiral Bevel Gear 13
0 Ring 26
Ball Bearing 6WOLB
Woodruff Key 3
RetainingRing R-26
Fan 70
ARMATURE ASSEMBLY
(Assembled Items9 - 11 1
Ball Bearing 608LB
Plats
FIELD ASSEMBLY
(WithGarter Spring x 21
Insulation Warher
H Nut M4
H Bolt M4x70 (WithWarherl
Rubber Pin 4
Motor Housing
(WithBrush Holder x 21
Carbon Brush
Brush Holder Cap
Rivet 0-5
Name Plate
Rear Cover
P H Screw M5x70 [With Warherl
CordGuard
COR0 ASSEMBLY
IArsembled Cord. Plug & Cord Guard)
P H Screw M4x14 (WithWasher1
Stram Relief
Switch Holder
MACHINE
31
32
33
34
35
36
31
38
39
40
41
42
43
44
45
46
47
48
49
50
51
2
1
1
1
1
1
1
1
1
1
4
1
1
1
1
1
1
1
1
1
1
P H Screw M4x14 (WithWarherl
Comprerrion Spring 6
Double Pole Switch
StopRing E-2 3
Switch Rod
Woodruff Key 3
Swltch Lever
Lock Nut
Inner Flange
Wheel Cover
P H Screw M4x16 (WithWasher)
Bearing Box
S Washer 5
P H Screw M5x16
Spindle
F Washer 12
Ball Bearing 6201LB
RetainingRing R-32
Spiral Bevel Gear 40
Retamng Ring s-12
Gear Housing
KCESSORIES
400 1 DepressedCenter Wheel 125-24
401 I 1 I Grip 37
7

MAKITA LIMITED ONE YEAR WARRANTY
Warranty Policy
Every Makita tool is thoroughly inspected and tested before leavingthe factory. It is warranted to
be free of defects from workmanshipand materials for the period of ONE YEAR from the date of
original purchase. Should any trouble develop during this one-year period, retum the COMPLETE
tool, freight prepaid, to one of Makita's Factory or Authorized ServiceCenters. If inspection shows
the trouble is caused by defective workmanship or material, Makita will repair (or at our option,
replace) without charge.
This Warranty does not apply where:
a repairs have been made or attempted by others:
a there is evidence of normal wear and tear;
a The tool has been abused, misused or improperly maintained ;
a alterations have been made to the tool.
IN NO EVENT SHALL MAKITA BE LIABLE FOR ANY INDIRECT, INCIDENTAL OR CON-
SEQUENTIAL DAMAGES FROM THE SALEOR USE
OF THE PRODUCT. THIS DISCLAIMER
APPLIESBOTH DURING AND AFTER THE TERM
OF THIS WARRANTY.
MAKITA DISCLAIMS LIABILITY FOR
ANY IMPLIED WARRANTIES, INCLUDING 1MPLlED
WARRANTlES
OF "MERCHANTABILITY" AND "FITNESS FOR A SPECIFIC PURPOSE,"
This Warranty gives you specific legal rights, and you may also have other rights which vary from
state to state. Some states do not allow the exclusion or limitation
of incidental or consequential
damages,
so the above limitation or exclusion may not apply to you. Some states do not allow
Limitation on how long an implied warranty lasts,
so the above Iimitation may not apply to you.
AFTER THE ONE-YEAR TERM OF THIS WARRANTY.
muKizuFlrrtkrr Wm&6,Ltd.
11-8,3-chome, Sumiyorhi-cho.Anjo, Aichi 446, Japan
883306-061
PRINTED IN JAPAN
1982 - 12 -N