Makita Grinder N9514B User Manual

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  
 
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
 
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 livewire 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
 
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
 
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 ONposition for ease of  
operator comfort during extended use. Apply caution  
when locking tool in ONposition 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
 
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
 
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
 
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
 
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 tools 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  
 
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  
 
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  
 
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  
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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 CUSTOMERS 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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FACTORY SERVICE CENTERS  
1-800-4-MAKITA  
RETAIN THIS PORTION FOR YOUR RECORDS  
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Duluth, GA 30096  
(770) 476-8911  
4129 S. 84th St.  
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La Mirada, CA 90638-5753  
(714) 522-8088  
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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  
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Mt. Prospect, IL 60056-6011  
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(916) 482-5197  
MARYLAND  
TEXAS  
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San Diego, CA 92111  
(858) 278-4471  
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12801 Stemmons Fwy Ste. 809  
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232 Providence Hwy.  
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(781) 461-9754  
NEWYORK  
4917 Genessee Street  
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(716) 685-9503  
3453 IH-35 North, Ste. 101  
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11839 E. 51st Ave.  
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6427 Penn Ave. South  
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OREGON  
828 19th Avenue, N.W.  
Portland, OR 97209  
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WISCONSIN  
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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  
 
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  
Makitas 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  
MERCHANTABILITYAND 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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