Disc Grinder
100 mm (4”)
MODEL N9514B
DOUBLE
INSULATION
I N S T R U C T I O N M A N U A L
WARNING:
For your personal safety, READ and UNDERSTAND before using.
SAVE THESE INSTRUCTIONS FOR FUTURE REFERENCE.
w w w. m a k i t a t o o l s . c o m
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5. Avoid body contact with grounded sur-
faces such as pipes, radiators, ranges and
refrigerators. There is an increased risk of
electric shock if your body is grounded.
14. Use safety equipment. Always wear eye
protection. Dust mask, non-skid safety
shoes, hard hat, or hearing protection must
be used for appropriate conditions. Ordinary
eye or sun glasses are NOT eye protection.
6. Do not expose power tools to rain or wet
conditions. Water entering a power tool will
increase the risk of electric shock.
Tool Use and Care
15. Use clamps or other practical way to
secure and support the workpiece to a
stable platform. Holding the work by hand or
against your body is unstable and may lead
to loss of control.
7. Do not abuse the cord. Never use the cord
to carry the tools or pull the plug from an
outlet. Keep cord away from heat, oil,
sharp edges or moving parts. Replace
damaged cords immediately. Damaged
cords increase the risk of electric shock.
16. Do not force tool. Use the correct tool for
your application. The correct tool will do the
job better and safer at the rate for which it is
designed.
8. When operating a power tool outside, use
an outdoor extension cord marked “W-A”
or “W”. These cords are rated for outdoor
use and reduce the risk of electric shock.
17. Do not use tool if switch does not turn it
on or off. Any tool that cannot be controlled
with the switch is dangerous and must be
repaired.
Personal Safety
9. Stay alert, watch what you are doing and
use common sense when operating a
power tool. Do not use tool while tired or
under the influence of drugs, alcohol, or
medication. A moment of inattention while
operating power tools may result in serious
personal injury.
18. Disconnect the plug from the power
source before making any adjustments,
changing accessories, or storing the tool.
Such preventive safety measures reduce the
risk of starting the tool accidentally.
19. Store idle tools out of reach of children
and other untrained persons. Tools are
dangerous in the hands of untrained users.
10. Dress properly. Do not wear loose cloth-
ing or jewelry. Contain long hair. Keep
your hair, clothing, and gloves away from
moving parts. Loose clothes, jewelry, or long
hair can be caught in moving parts.
20. Maintain tools with care. Keep cutting
tools sharp and clean. Properly maintained
tools with sharp cutting edges are less likely
to bind and are easier to control.
11. Avoid accidental starting. Be sure switch
is off before plugging in. Carrying tools with
your finger on the switch or plugging in tools
that have the switch on invites accidents.
21. Check for misalignment or binding of
moving parts, breakage of parts, and any
other condition that may affect the tools
operation. If damaged, have the tool ser-
viced before using. Many accidents are
caused by poorly maintained tools.
12. Remove adjusting keys or wrenches
before turning the tool on. A wrench or a
key that is left attached to a rotating part of
the tool may result in personal injury.
22. Use only accessories that are recom-
mended by the manufacturer for your
model. Accessories that may be suitable for
one tool, may become hazardous when used
on another tool.
13. Do not overreach. Keep proper footing
and balance at all times. Proper footing and
balance enables better control of the tool in
unexpected situations.
3
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24. When servicing a tool, use only identical
replacement parts. Follow instructions in
the Maintenance section of this manual.
Use of unauthorized parts or failure to follow
Maintenance instructions may create a risk of
electric shock or injury.
SERVICE
23. Tool service must be performed only by
qualified repair personnel. Service or main-
tenance performed by unqualified personnel
could result in a risk of injury.
USE PROPER EXTENSION CORD: Make sure your extension cord is in good condition.
When using an extension cord, be sure to use one heavy enough to carry the current your
product will draw. An undersized cord will cause a drop in line voltage resulting in loss of
power and overheating. Table 1 shows the correct size to use depending on cord length and
nameplate ampere rating. If in doubt, use the next heavier gage. The smaller the gage num-
ber, the heavier the cord.
Table 1: Minimum gage for cord
Volts
120 V
Total length of cord in feet
Ampere Rating
25 ft.
50 ft.
100 ft.
150 ft.
More Than
Not More Than
AWG
0
6
10
12
6
18
18
16
14
16
16
16
12
16
14
14
14
12
12
10
12
16
Not Recommended
SPECIFIC SAFETY RULES
USB005-3
DO NOT let comfort or familiarity with product (gained from
repeated use) replace strict adherence to grinder safety rules. If
you use this tool unsafely or incorrectly, you can suffer serious
personal injury.
1. Always use proper guard with grinding
wheel. A guard protects operator from bro-
ken wheel fragments.
its own cord. Contact with a “live” wire will
make exposed metal parts of the tool “live”
and shock the operator.
2. Accessories must be rated for at least the
speed recommended on the tool warning
label. Wheels and other accessories running
over rated speed can fly apart and cause
injury.
4. When using depressed center grinding
wheels, be sure to use only fiberglass-
reinforced wheels.
5. Always use safety glasses or goggles.
Ordinary eye or sun glasses are NOT
safety glasses.
3. Hold tool by insulated gripping surfaces
when performing an operation where the
cutting tool may contact hidden wiring or
4
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6. Check the wheel carefully for cracks or
damage before operation. Replace
14. Before using the tool on an actual work-
piece, let it run for a while. Watch for
vibration or wobbling that could indicate
poor installation or a poorly balanced
wheel.
cracked or damaged wheel immediately.
Run the tool (with guard) at no load for
about a minute, holding tool away from
others. If wheel is flawed, it will likely sep-
arate during this test.
15. Use the specified surface of the wheel to
perform the grinding.
7. Use only flanges specified for this tool.
16. Watch out for flying sparks. Hold the tool
so that sparks fly away from you and other
persons or flammable materials.
8. 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.
17. Do not leave the tool running. Operate the
tool only when hand-held.
9. NEVER use tool with wood cutting blades
or other sawblades. Such blades when
used on a grinder frequently kick and
cause loss of control leading to personal
injury.
18. Do not touch the workpiece immediately
after operation; it may be extremely hot
and could burn your skin.
19. ALWAYS wear proper apparel including
long sleeve shirts, leather gloves and
shop aprons to protect skin from contact
with hot grindings.
10. Hold the tool firmly.
11. Keep hands away from rotating parts.
12. Make sure cord is clear of wheel. Do not
wrap cord around your arm or wrist. If
control of tool is lost, cord may become
wrapped around you and cause personal
injury.
20. Use of this tool to grind or sand some
products, paints and wood could expose
user to dust containing hazardous sub-
stances. Use appropriate respiratory pro-
tection.
13. Make sure the wheel is not contacting the
workpiece before the switch is turned on.
SAVE THESE INSTRUCTIONS
WARNING:
MISUSE or failure to follow the safety rules stated in this
instruction manual may cause serious personal injury.
5
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FUNCTIONAL
DESCRIPTION
CAUTION:
•
Always be sure that the tool is switched off and
unplugged before adjusting or checking function on the
tool.
001032
Switch action
CAUTION:
1
•
Before plugging in the tool, always check to see that the
slide switch actuates properly and returns to the “OFF”
position when the rear of the slide switch is depressed.
•
Switch can be locked in “ON” position for ease of
operator comfort during extended use. Apply caution
when locking tool in “ON” position and maintain firm
grasp on tool.
1. Switch lever
To start the tool, slide the slide switch toward the “I (ON)”
position. For continuous operation, press the front of the
slide switch to lock it.
To stop the tool, press the rear of the slide switch, then slide
it toward the “O (OFF)” position.
001047
Overload protector
1
The overload protector automatically cuts out to break the
circuit and the button pops out, whenever heavy work is pro-
longed. Wait 20-30 seconds before pressing the reset button
to resume operation. The tool should be switched off when
you press the reset button, however.
1. Restart button
6
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ASSEMBLY
CAUTION:
•
Always be sure that the tool is switched off and
unplugged before carrying out any work on the tool.
001050
Installing side grip (handle)
CAUTION:
•
Always be sure that the side grip is installed securely
before operation.
Screw the side grip securely on the position of the tool as
shown in the figure.
001069
Installing or removing depressed center grinding
wheel/Multi-disc
1
2
3
WARNING:
•
Always use supplied guard when depressed center
grinding wheel/Multi-disc is on tool. Wheel can shatter
during use and guard helps to reduce chances of
personal injury.
1. Lock nut
Screw the inner flange onto the spindle. Make sure that the
recessed side of the inner flange is placed next to the wheel.
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 the inner flange and screw the lock nut onto the
spindle.
2. Depressed center wheel
3. Inner flange
001081
1
2
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 clockwise.
To remove the wheel, follow the installation procedure in
reverse.
1. Lock nut wrench
2. Wrench
3. Tighten
7
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001093
Installing or removing flex wheel
(optional accessory)
1
2
WARNING:
3
4
•
Always use supplied guard when flex wheel is on tool.
Wheel can shatter during use and guard helps to reduce
chances of personal injury.
Follow instructions for depressed center grinding wheel/
Multi-disc but also use plastic pad over wheel. See order of
assembly on accessories page in this manual.
1. Lock nut
2. Flexible grinding wheel
3. Pad
4. Inner flange
001081
1
2
1. Lock nut wrench
2. Wrench
3. Tighten
001104
Installing or removing abrasive disc
(optional accessory)
1
2
3
NOTE:
•
Use sander accessories specified in this manual. These
must be purchased separately.
Mount the rubber pad onto the spindle. Fit the disc on the
rubber pad 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 clockwise.
1. Lock nut
2. Abrasive disc
3. Rubber pad
001081
To remove the disc, follow the installation procedure in
reverse.
1
2
1. Lock nut wrench
2. Wrench
3. Tighten
8
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OPERATION
001119
WARNING:
•
It should never be necessary to force the tool. The
weight of the tool applies adequate pressure. Forcing
and excessive pressure could cause dangerous wheel
breakage.
15˚
•
•
•
ALWAYS replace wheel if tool is dropped while grinding.
NEVER bang or hit grinding disc or wheel onto work.
A
B
Avoid bouncing and snagging the wheel, especially
when working corners, sharp edges etc. This can cause
loss of control and kickback.
•
NEVER use tool with wood cutting blades and other
sawblades. Such blades when used on a grinder
frequently kick and cause loss of control leading to
personal injury.
CAUTION:
•
After operation, always switch off the tool and wait until
the wheel has come to a complete stop before putting
the tool down.
ALWAYS hold the tool firmly with one hand on housing and
the other on the side handle. Turn the tool on and then apply
the wheel or disc to the workpiece.
In general, keep the edge of the wheel or disc at an angle of
about 15 degrees to the workpiece surface.
During the break-in period with a new wheel, do not work the
grinder in the B direction or it will cut into the workpiece.
Once the edge of the wheel has been rounded off by use, the
wheel may be worked in both A and B direction.
001133
Operation with wire cup brush
(optional accessory)
1
CAUTION:
•
•
Check operation of brush by running tool with no load,
insuring that no one is in front of or in line with brush.
Do not use brush that is damaged, or which is out of
balance. Use of damaged brush could increase potential
for injury from contact with broken brush wires.
1. Wire cup brush
Unplug tool and place it upside down allowing easy access
to spindle. Remove any accessories on spindle. Thread wire
9
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cup brush onto spindle and tighten with supplied wrench.
When using brush, avoid applying too much pressure which
causes over bending of wires, leading to premature break-
age.
001190
Operation with wire wheel brush
(optional accessory)
1
CAUTION:
•
•
Check operation of wire wheel brush by running tool with
no load, insuring that no one is in front of or in line with
the wire wheel brush.
Do not use wire wheel brush that is damaged, or which
is out of balance. Use of damaged wire wheel brush
could increase potential for injury from contact with
broken wires.
1. Wire wheel brush
•
ALWAYS use guard with wire wheel brushes, assuring
diameter of wheel fits inside guard. Wheel can shatter
during use and guard helps to reduce chances of
personal injury.
Unplug tool and place it upside down allowing easy access
to spindle. Remove any accessories on spindle. Thread wire
wheel brush onto spindle and tighten with the wrenches.
When using wire wheel brush, avoid applying too much pres-
sure which causes over bending of wires, leading to prema-
ture breakage.
MAINTENANCE
CAUTION:
001158
•
Always be sure that the tool is switched off and
unplugged before attempting to perform inspection or
maintenance.
1
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.
2
To maintain product SAFETY and RELIABILITY, repairs, car-
bon brush inspection and replacement, any other mainte-
nance or adjustment should be performed by Makita
Authorized or Factory Service Centers, always using Makita
replacement parts.
1. Exhaust vent
2. Inhalation vent
10
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ACCESSORIES
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. Only use accessory
or attachment for its stated purpose.
Your tool is supplied with a guard for use with a
depressed center grinding wheel, multi-disc, flex wheel
and wire wheel brush. If you decide to use your Makita
grinder with approved accessories which you purchase
from your Makita distributor or factory service center, be
sure to obtain and use all necessary fasteners and
guards as recommended in this manual. Your failure to
do so could result in personal injury to you and others.
If you need any assistance for more details regarding these
accessories, ask your local Makita service center.
11
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001178
2
1
3
4
5
3
9
3
13
4
7
10
11
12
6
8
6
N9514B
Grip 36
1
2
Grip holder
Wheel guard
Inner flange 35
3
4
5
100 mm (4”) Depressed centerwheel/Multi-disc
Lock nut 10-35
6
7
Plastic pad
8
100 mm (4”) Flex wheel
Rubber pad
9
10
11
12
13
14
15
Abrasive disc
Sanding lock nut 30
Wire wheel brush
Wire cup brush
Wrench 14
Lock nut Wrench 20
12
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First-Class
Postage
Required
Post Office will
not deliver
without proper
postage.
Makita U.S.A., Inc.
14930 Northam Street
La Mirada, CA 90638-5753
Fold
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MAIL THIS PORTION
Your answers to the following questions are appreciated.
1.This product was purchased from:
3. How did you learn about this product:
Home Center
Other (
)
Magazine
Radio
Hardware/Lumber Store
Tool Distributor
From Dealer
Newspaper
Store Display
Catalog
Exhibition
From Friend
Previous Usage
Other (
Industrial Supply
Construction Supply
)
2. Use of the product is intended for:
4. Most favored points are:
Construction Trade
Industrial Maintenance
Home Maintenance
Hobby
Design
Repair Service
Durability
Power
Features
Size
Price
Other (
)
Other (
)
Makita Brand
5. Any comments:
DATE PURCHASED
MONTH
MODEL NO.
DAY
YEAR
SERIAL NO.
STATUS
SEX
Married Single
M
F
INTL.
LAST NAME / COMPANY NAME
STREET ADRESS
CITY
AREA
CODE
STATE
ZIP CODE
PHONE
40-49
Under 19
20-29
30-39
50-60
Over 60
AGE:
BE SURE TO COMPLETE THE CUSTOMER’S PORTION OF THIS FORM AND RETAIN FOR YOUR RECORDS.
Please return this portion by facsimile or mail.
Facsimile No: (714) 522-8133
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Paste
Paste
Paste
Paste
Paste
Paste
Paste
Paste
FACTORY SERVICE CENTERS
1-800-4-MAKITA
RETAIN THIS PORTION FOR YOUR RECORDS
ARIZONA
FLORIDA
MISSOURI
PENNSYLVANIA
1704 Babcock Blvd.
Pittsburgh, PA 15209
(412) 822-7370
3707 E. Broadway Rd., Ste. 6
Phoenix, AZ 85040
(602) 437-2850
750 East Sample Road
Pompano Beach, FL 33064
(954) 781-6333
9876 Watson Road
St. Louis, MO 63126-2221
(314) 909-9889
CALIFORNIA
GEORGIA
NEBRASKA
PUERTO RICO
41850 Christy St.
Fremont, CA 94538-5107
(510) 657-9881
4680 River Green Parkway NW
Duluth, GA 30096
(770) 476-8911
4129 S. 84th St.
Omaha, NE 68127
(402) 597-2925
200 Guayama St.
Hato Rey, PR 00917
(787) 250-8776
14930 Northam St.
La Mirada, CA 90638-5753
(714) 522-8088
ILLINOIS
NEVADA
3375 S. Decatur Blvd.
Suites. 22 - 24
Las Vegas, NV 89102
(702) 368-4277
TENNESSEE
1120 Elm Hill P.
Suile 170 Nashville, TN 372
(615) 248-3321
1450 Feehanville Dr.
Mt. Prospect, IL 60056-6011
(847) 297-3100
1970 Fulton Avenue
Sacramento, CA 95825
(916) 482-5197
MARYLAND
TEXAS
7674 Clairemont Mesa Blvd.
San Diego, CA 92111
(858) 278-4471
7397 Washington Boulevard,
Suite 104 Elkridge, MD 21075
(410) 796-4401
NEW JERSEY
12801 Stemmons Fwy Ste. 809
Farmers Branch, TX 75234
(972) 243-1150
251 Herrod Blvd.
Dayton, NJ 08810-1539
(609) 655-1212
16735 Saticoy St., Ste. 105
Van Nuys, CA 91406
(818) 782-2440
12701 Directors Dr.
Stafford, TX 77477-3701
(281) 565-8665
MASSACHUSETTS
232 Providence Hwy.
Westwood, MA 02090
(781) 461-9754
NEWYORK
4917 Genessee Street
Cheektowaga, NY 14225
(716) 685-9503
3453 IH-35 North, Ste. 101
San Antonio, TX 78219
(210) 228-0676
COLORADO
11839 E. 51st Ave.
Denver, CO 80239-2709
(303) 371-2850
MINNESOTA
6427 Penn Ave. South
Richfield, MN 55423
(612) 869-5199
OREGON
828 19th Avenue, N.W.
Portland, OR 97209
(503) 222-1823
WISCONSIN
Lincoln Plaza Shopping Ctr.
2245 S. 108th St. West Allis, WI
53227
(414) 541-4776
CUSTOMER’S RECORD
Date Purchased
When you need service: Send
complete tool (prepaid) to one
of the Makita Factory Service
Centers listed, or to an Authorized
Makita Service Center. Be sure
to attach a letter to the outside of
the carton detailing the problem
with your tool.
Dealer’s Name & Address
Model No.
Serial No.
15
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WARNING
Some dust created by power sanding, sawing, grinding, drilling, and other
construction activities contains chemicals known to the State of California
to cause cancer, birth defects or other reproductive harm. Some examples
of these chemicals are:
• lead from lead-based paints,
• crystalline silica from bricks and cement and other masonry products, and
• arsenic and chromium from chemically-treated lumber.
Your risk from these exposures varies, depending on how often you do this
type of work. To reduce your exposure to these chemicals: work in a well
ventilated area, and work with approved safety equipment, such as those
dust masks that are specially designed to filter out microscopic particles.
MAKITA LIMITED ONE YEAR WARRANTY
Warranty Policy
Every Makita tool is thoroughly inspected and tested before leaving the 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 Service Centers. 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:
• repairs have been made or attempted by others:
• repairs are required because of normal wear and tear:
• the tool has been abused, misused or improperly maintained:
• alterations have been made to the tool.
IN NO EVENT SHALL MAKITA BE LIABLE FOR ANY INDIRECT, INCIDENTAL OR CONSEQUENTIAL
DAMAGES FROM THE SALE OR USE OF THE PRODUCT. THIS DISCLAIMER APPLIES BOTH DURING
AND AFTER THE TERM OF THIS WARRANTY.
MAKITA DISCLAIMS LIABILITY FOR ANY IMPLIED WARRANTIES, INCLUDING IMPLIED WARRANTIES OF
“MERCHANTABILITY” AND “FITNESS FOR A SPECIFIC PURPOSE,” AFTER THE ONE YEAR TERM OF THIS
WARRANTY.
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 limitation may not apply to you.
Makita Corporation of America
2650 Buford Hwy., Buford, GA 30518
883623E994
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