Makita N9501B User manual

Disc Grinder
No load speed
IRPM)
10,000
100 mm (4”) MODEL N9501B
Overall length Net weight Spindle thread
260 mm (10-1/4”) 1.8 kg 14 Ibs) MlOx 1.25
INSTRUCTION MANUAL
DOUBLE
INSULATION
* Manufacturer reserves the right to change specifications without notice.
Note: Specifications may differ from country to country.

I M PORTANT
SAFETY INSTRUCTIONS
(For All Tools)
WARNING: WHEN USING ELECTRIC TOOLS, BASIC SAFE-
TY PRECAUTIONS SHOULD ALWAYS BE FOLLOWED
TO
SONAL INJURY, INCLUDING THE FOLLOWING:
REDUCE THE RISK OF FIRE, ELECTRIC SHOCK, AND PER-
READ ALL INSTRUCTIONS.
1.
2.
3.
4.
5.
6.
7.
8.
9.
IO.
11.
12.
2
KEEP WORK AREA CLEAN. Cluttered areas and benches invite injuries.
CONSIDER WORK AREA ENVIRONMENT. Don't use power tools in damp
or wet locations. Keep work area well
lit. Don't expose power tools torain.
Don't use tool
in presence of flammable liquids or gases.
KEEP CHILDREN AWAY. All visitors should be kept away from work area.
Don't let visitors contact tool or extension cord.
STORE IDLETOOLS. When notinuse, tools should be stored indry, and high
or locked-up place
- out of reach of children.
DON'T FORCETOOL.
It will do thejob better and safer at the rate for which
it was intended.
USE RIGHT TOOL. Don't force small tool or attachment to do the job of a
heavy-duty tool. Don't use tool for purpose not intended.
DRESS PROPERLY. Don't wear loose clothing orjewelry. They can be caught
in moving parts. Rubber gloves and non-skid footwear are recommended
when working outdoors. Wear protective hair covering to contain long hair.
USE SAFETY GLASSES. Also use face or dust mask
if cutting operation is
dusty.
DON'T ABUSE CORD. Never carry tool by cord or yank
it todisconnect from
receptacle. Keep cord from heat, oil, and sharp edges.
SECURE WORK. Use clamps or a vise to hold work. It's safer than using
your hand and
it frees both hands to operate tool.
DON'T OVERREACH. Keep proper footing and balance at all times.
MAINTAIN TOOLS WITH CARE. Keep tools sharp and clean for better and
safer performance. Follow instructions for lubricating and changing acces-
sories. Inspecttool cords periodicallyand
if damaged, have repairedby autho-
rized service facility. Inspect extension cords periodically and replace if
damaged. Keep handles dry, clean, and free from oil and grease.

13. DISCONNECTTOOLS. When not in use, beforeservicing, and when chang-
ing accessories, such as blades, bits, cutters.
14. REMOVE ADJUSTING KEYS AND WRENCHES. Form habit of checking to
see that keys andadjusting wrenches are removedfrom tool beforeturning
it on.
15. AVOID UNINTENTIONAL STARTING.Don't carry plugged-intool with finger
on switch. Be sure switch is OFF when plugging
in.
16. OUTDOOR USE EXTENSION CORDS. When tool is usedoutdoors, use only
extension cords intended for use outdoors and
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 carefully checked to determine that
it will
operate properly and perform its intended function. Check for alignment of
movingparts, bindingof movingparts, breakageof parts, mounting, and any
other conditions that may affect its operation. A guard or other part that
is damaged should be properly repaired or replaced by an authorized serv-
ice center unless otherwise indicated elsewhere
in this instruction manual.
Have defective switches replaced by authorized service center. Don't use
tool if switch does not turn
it on and off.
19. GUARD AGAINST ELECTRIC SHOCK. Prevent body contact with grounded
surfaces. For example; pipes, radiators, ranges, refrigerator enclosures.
20. REPLACEMENTPARTS. When servicing, useonly identicalreplacement parts.
VOLTAGE WARNING: Before connectingthe tool toa 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 voltage greater than that specified
for the tool can result
in SERIOUS INJURY to 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.
3

ADDITIONAL SAFETY RULES
1. Keep guards in place.
2. Useonly wheels havinga maximumoperatingspeed at leastas highas "No
Load RPM" marked onthe tool's nameplate. When using depressed center
wheels, be sure to use only fiberglass-reinforced wheels.
3. Check the wheel carefully for cracks or damage before operation. Replace
cracked or damaged wheel immediately.
4. Use only flanges specified for this tool.
5. Be careful not to damage the spindle, the flange (especially the installing
surface) or the lock nut. Damage to these parts could result
in wheel
breakage.
6. Hold the tool firmly.
7. Keep hands away from rotating parts.
8. Make sure the wheel is not contactingthe workpiece before the switch is
turned on.
9. Before using the tool on an actual workpiece, let it run for a while. Watch
for vibration or wobbling that could indicate poor installation or a poorly
balanced wheel.
IO. Use the specified surface of the wheel to perform the grinding.
11. Watch out for flying sparks. Hold the tool so that sparks fly away from you
12. Do not leave the tool running. Operate the tool only when hand-held.
13. Do not touchthe workpiece immediately after operation; it may beextremely
and other persons or flammable materials.
hot and could burn your skin.
SAVE THESE INSTRUCTIONS.
4

Installing side grip (auxiliary handle)
71
Installing or removingdepressed center wheel
CAUTION:
Always be sure that the tool
is switched off and unpluggedbefore installing or removing
the wheel.
Screw the inner flange onto the spindle.
Hold the spindle with the wrench
so that
it cannot revolve, then use the lock nut
wrench to secure the inner flange. Fit the
wheel on over the inner flange and screw
the lock nut onto the spindle.
To tighten the lock nut, hold the spindle
with the wrench
so that it cannot revolve,
then use the lock nut wrench and securely
tighten dockwise.
Lock nut
Inner flange
I
I
To removethe wheel, follow the installation procedure in reverse.
5

Switch action
Slide the slide switch forward to start, and
the switch will lock in the "ON" position.
To stop, lightly depress the rear of the
switch, and
it will return to the "OFF"
position.
CAUTION:
Before plugging in the tool, always check
to
see that the switch actuates properly
and returns to the
"OFF" Position when
depressed.
Operation
Hold the tool firmly. Turn the tool on and
then apply the wheel or disc
to the work-
piece.
In general, keep the edge
of the wheel or
disc
at an angle of about 15" to the work-
piece surface.
During the break-in period with
a new
wheel, do not work the grinder in the B
direction or
it will cut into the workpiece.
Once the edge
of the wheel has been
rounded off by use, the wheel may be
worked in bothA and Bdirections.
Slide switch
1
WARNING :
0 If should never be necessary to force the tool. The weight of the tool applies adequate
pressure. Forcingand excessive pressure could cause dangerouswheel breakage.
0 Continued use of a worn-out wheel may result in wheel explosionand serious personal
injury. Depressed center wheel should not be used after
it has been worn down to
75 mm (3") in diameter. Use of the wheel after this point is unsafe and it should be re-
moved from service and rendered unusable
by intentional destruction.
6

Installing the abrasive disc
(Optional accessory for Model 9501821
1. For disc sanding, assemble tool as seen
at right. (Remove the wheel cover on
tool.)
2. When installingthe abrasivedisc, gripthe
spindle (shaft)withthe wrench, put on
therubber pad, theabrasivedisc and lock
nut, thentightenthelock nuttothe right
(clockwise).
Operation
1. In general, keep the edge of the abrasive
disc at an angle of about
10' - 15' in
relation to the workpiece surface.
(grade) for the right
job.
2. Choosean abrasivedisc withtherightgrit
Rubber pad
Inner flange
Lock
nut wrench
+I
Installing abrasive cut-off wheel (Optional accessory)
WARNING:
When using anabrasive cut-off wheel, besuretouseonlythespecial wheel guard, special
inner flange and special lock nut designed for use with cut-off wheels.
Readandthoroughly understandthe instruction manualofthespecial wheel guardtoinstall
the abrasive cut-off wheel.
7

MAINTENANCE
CAUTION :
Always be sure that the tool is switched off and unpluggedbefore attempting to perform
inspectionor maintenance.
same time. Use
only identical carbon
brushes.
Replacing carbon brushes
Remove and check the carbon brushes
Limit mark
regularly. Replacewhen they wear downto
the limit mark. Keep the carbon brushes
clean and free to slip in the holders. Both
carbon brushes should be replaced at the
Use
a screwdriver to remove the brush
brushes, insert the new ones and secure
'
holder caps. Take out the worn carbon
Brush holder cap
the brush holder caps.
To maintain product SAFETY and RELlABlLITY, repairs, any other maintenance or
adjustment should be performed by Makita Authorized or Factory Service Centers,
always using Makita replacement parts.
8

ACCESORI ES
CAUTION:
These accessories or attachments are recommended for use with your Makita tool specified in this
manual.
The use of any other accessories or attachments might present a risk of injury to persons.
The accessoriesor attachments should be usedonly in the proper and intended manner.
Part No. I Size imml
@Wheel cover
Part
No. 342554-4
Grit
@ Depressed center wheels
742038~0A
Part No.
40
741405211
742038-00
742038-OC
742038-00
Size lmm)
100 x 4 x 16
14" x 3/16' x 5/8")
60
80
100
100
x 13 x 16
14'' x 112'' x 518"l
@ Lock nut 10-35
Part No. 224545-6
@ Inner flange 35
Part No. 224291-1
@ Multi-disc
9

@ Abrasive discs
Part No.
724104-110
0 Locknut 10-30
(For abrasive disc)
Part No. 224501-6
size Imm) ~rlt
per pkg For use
,,.!",",;,',5: $.., 36 10 For masonry and concrete.
742040-A-5
Diameter
4"
Grit Qty. per pkg.
t;ht---
3
0 Cut-off wheel
@ Wire cup brush 75
Part No. 743201-4
@ Wire bevel brush 85
Part No. 743203-0
@) Grip holder @Wheel guard assembly
(For cut-off
wheel)
Part No. 122363-5
Part No. 164329-9
724107-510 I ,,..~~,~~,xx',",,.., I 46 1
10 I For steel and cast iron
0 Grip 26 0 Steel carrying case Wrench 14
Part No. 273485-5 Part No. 181717-5 Part No. 781007-2
'L.
0 Lock nut wrench 20
Part No. 782401-1
10

Feb.-20-'92 US
100 mm (4')
DISC GRINDER
Model N9501B
Note: The switch and other part configurations
may differ from country to country.
11

1 4 Pan Head Screw M4x20 IWith Washer)
2 1
Gear Housing
3 1 Ball Bearing 6WOLLB
4 2 Pan Head Screw M5x14 lWnh Washer)
5 1
Bearing Retainer 35
6 1 Fan 60
7 1 ARMATURE ASSEMBLY
8 2 Pan Head Screw M4x70 lWith Warherl
9 1 FIELD ASSEMBLY
lWith
Item 6. 7. 14 & 161
10 1 Motor Housing
13 1 Switch
Holder
14 1 Insulation Washer
15 1
Rubber Pin 4
16 1 Ball
Bearing 627LLB
17 1 Switch
Lever
16 2 Carbon Brush
19 2 Brush Holder
Cap
21 1 Strain Relief
22 2 Pan Head Screw M4x14 IWith Warherl
23 1
Pan Head Screw M3xB lW8th Washerl
24 2
Pan Head Screw M4x6 IWith Washerl
25 1 Set Plate
26 1 Switch
27
2 Pan Head Screw M4x16 lWi1h Washer)
MAKITA LIMITED ONE YEAR WARRANTY
26 1 Cord Guard
29 1 Name Plate
31 1 Rearcover
32 1 Cord
33 2 Pan Head Screw M4x60
35 1
Spiral Bevel Gear 15
36 1 Woodruff
Key 3
37 1
Retaining Ring S-10
36 1 Spiral Bevel Gear 35
39 3
Pan Head Screw M4x14 lWith Washerl
40 1 Bearing Retainer 40
41 1 Ball Bearing 6201DOW
42 1 Flat Washer 12
44 1
Woodruff Key 3
45 1 Spindle
46 A.R. Shim
47 1
Bearing BOX
46 3
Pan Head Screw M5x16 IWith Washerl
49 1 Wheel Cover
50 3 Pan Head Screw M5x16 (With Washerl
51 1
Inner Flange 35
52 1 Lock Nut 10-35
53
1 Grip Holder
406 1 Grip 26
Warranty Policy
Every Makita tool is thoroughly inspected and tested before leavingthe factory. It is warranted to
be free of defects from workmanship and materials for the period of ONE YEAR from the date of
original purchase. Should any trouble develop during this one-year period, return 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:
e repairs have been made or attempted by others:
repairs are required because of normal wear and tear:
e The tool has been abused, misused or improperly maintained;
e alterationshave 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 THISWARRANTY.
MAKITA DISCLAIMS LIABILITY FOR ANY IMPLIED WARRANTIES, INCLUDING IMPLIED
WARRANTIES OF “MERCHANTABILITY” AND “FITNESS FOR A SPECIFIC PURPOSE,”
AFTER THE ONE-YEARTERM OFTHISWARRANTY.
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 onhow long an implied warranty
lasts, so the above Limitation may not apply to you.
Makita Corporation
3-11 -8, Sumiyoshi-cho,
Anjo, Aichi
446 Japan
8632258061 PRINTED IN JAPAN
1992 - 4 - N