Makita Grinder 9520NB User Manual

Angle Grinder  
100 mm 9520NB  
115 mm 9521NB  
125 mm 9522NB  
DOUBLE  
INSULATION  
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Explanation of general view  
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2
3
4
5
Wheel guard  
Bearing box  
Screw  
Lock nut  
Depressed center wheel  
6
Inner flange  
Spindle  
Lock nut wrench  
Shaft lock  
10 Switch lever  
11 Limit mark  
12 Brush holder cap  
13 Screwdriver  
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13. Don’t overreach  
Keep proper footing and balance at all times.  
14. Maintain tools with care  
SAFETY INSTRUCTIONS  
Warning! When using electric tools, basic safety  
precautions should always be followed to reduce  
the risk of fire, electric shock and personal injury,  
including the following.  
Read all these instructions before attempting to  
operate this product and save these instructions.  
Keep tools sharp and clean for better and safer  
performance. Follow instructions for lubricating  
and changing accessories. Inspect tool cords  
periodically and, if damaged, have repaired by  
authorized service facility. Inspect extension cords  
periodically and replace if damaged. Keep  
handles dry, clean and free from oil and grease.  
15. Disconnect tools  
For safe operation:  
1. Keep work area clean  
Cluttered areas and benches invite injuries.  
2. Consider work area environment  
Don’t expose power tools to rain. Don’t use power  
tools in damp or wet locations. Keep work area  
well lit. Don’t use power tools in presence of  
flammable liquids or gases.  
3. Guard against electric shock  
Prevent body contact with grounded surfaces  
(e.g. pipes, radiators, ranges, refrigerators).  
4. Keep children away  
When not in use, before servicing, and when  
changing accessories such as blades, bits and  
cutters.  
16. Remove adjusting keys and wrenches  
Form the habit of checking to see that keys and  
adjusting wrenches are removed from tool before  
turning it on.  
17. Avoid unintentional starting  
Don’t carry plugged-in tool with finger on switch.  
Be sure switch is off when plugging in.  
18. Outdoor use extension cords  
When tool is used outdoors, use only extension  
cords intended for use outdoors and so marked.  
19. Stay alert  
Watch what you are doing. Use common sense.  
Do not operate tool when you are tired.  
20. Check damaged parts  
Do not let visitors contact tool or extension cord.  
All visitors should be kept away from work area.  
5. Store idle tools  
When not in use, tools should be stored in dry,  
high, or locked-up place, out of the reach of  
children.  
6. Don’t force tool  
It will do the job better and safer at the rate for  
which it was intended.  
7. Use right tool  
Don’t force small tools or attachments to do the  
job of a heavy duty tool. Don’t use tools for  
purposes not intended; for example, don’t use  
circular saw for cutting tree limbs or logs.  
8. Dress properly  
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 mov-  
ing parts, binding of moving parts, breakage of  
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 service center unless  
otherwise indicated elsewhere in this instruction  
manual. Have defective switches replaced by and  
authorized service center. Do not use tool if switch  
does not turn it on and off.  
Do not wear loose clothing or jewelry. 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.  
9. Use safety glasses and hearing protection  
Also use face or dust mask if cutting operation is  
dusty.  
10. Connect dust extraction equipment  
If devices are provided for the connection of dust  
extraction and collection facilities, ensure these  
are connected and properly used.  
11. Don’t abuse cord  
21. Warning  
The use of any other accessory or attachment  
other than recommended in this operating instruc-  
tion or the catalog may present a risk of personal  
injury.  
22. Have your tool repaired by an expert  
This electric appliance is in accordance with the  
relevant safety rules. Repairing of electric appli-  
ances may be carried out only by experts other-  
wise it may cause considerable danger for the  
user.  
Never carry tool by cord or yank it to disconnect it  
from receptacle. Keep cord from heat, oil and  
sharp edges.  
12. 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.  
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24. Do not use water or grinding lubricant.  
SAVE THESE INSTRUCTIONS.  
ADDITIONAL SAFETY RULES  
1. Always wear safety goggles and ear protec-  
tors during operation.  
ENB038-3  
2. Always be sure that the tool is switched off  
and unplugged before carrying out any work  
on the tool.  
OPERATING INSTRUCTIONS  
Installing the wheel guard (Fig. 1 & 2)  
Important:  
3. Keep guards in place.  
4. Use only wheels with correct size and wheels  
having a maximum operating speed at least as  
high as the highest No Load Speed marked on  
the tool’s nameplate. When using depressed  
center wheels, be sure to use only fiberglass-  
reinforced wheels.  
5. Check the wheel carefully for cracks or dam-  
age before operation. Replace cracked or  
damaged wheel immediately.  
Always be sure that the tool is switched off and  
unplugged before installing or removing the wheel  
guard.  
Mount the wheel guard with the tab on the wheel  
guard band aligned with the notch on the bearing box.  
Then rotate the wheel guard 180° clockwise (for  
9520NB) or counterclockwise (for 9521NB and  
9522NB). Be sure to tighten the screw securely.  
Side grip (auxiliary handle) (Fig. 3)  
6. Observe the instructions of the manufacturer  
for correct mounting and use of wheels.  
Handle and store wheels with care.  
7. Do not use separate reducing bushings or  
adaptors to adapt large hole abrasive wheels.  
8. Use only flanges specified for this tool.  
9. Do not damage the spindle, the flange (espe-  
cially the installing surface) or the lock nut.  
Damage to these parts could result in wheel  
breakage.  
10. For tools intended to be fitted with threaded  
hole wheel, ensure that the thread in the wheel  
is long enough to accept the spindle length.  
11. Before using the tool on an actual workpiece,  
test run the tool at the highest no load speed  
for at least 30 seconds in a safe position. Stop  
immediately if there is any vibration or wob-  
bling that could indicate poor installation or a  
poorly balanced wheel. Check the tool to  
determine the cause.  
For 9521NB and 9522NB only  
For your own safety, always use the side grip. The  
side grip can be installed on either side of the tool.  
Installing or removing the depressed center  
wheel (Fig. 4 & 5)  
Important:  
Always be sure that the tool is switched off and  
unplugged before installing or removing the wheel.  
Mount the inner flange onto the spindle. Fit the wheel  
on over the inner flange and screw the lock nut onto  
the spindle. Press the shaft lock to prevent spindle  
rotation, then use the lock nut wrench to tighten the  
lock nut securely.  
Warning:  
Only actuate the shaft lock when the spindle is not  
moving.  
12. Check that the workpiece is properly sup- Switching ON and OFF (Fig. 6)  
ported.  
13. Hold the tool firmly.  
CAUTION:  
Before plugging in the tool, always check to see that  
14. Keep hands away from rotating parts.  
15. Make sure the wheel is not contacting the  
workpiece before the switch is turned on.  
16. Use the specified surface of the wheel to  
perform the grinding.  
17. Do not use cutting off wheel for side grinding.  
18. Watch out for flying sparks. Hold the tool so  
that sparks fly away from you and other per-  
sons or flammable materials.  
19. Pay attention that the wheel continues to  
rotate after the tool is switched off.  
20. Do not touch the workpiece immediately after  
operation; it may be extremely hot and could  
burn your skin.  
the switch actuates properly and returns to the ‘‘OFF’’  
position when the rear of the switch lever is  
depressed.  
To switch on, depress the rear of the switch lever and  
push it forward. The depress the front of the switch  
lever to lock it.  
To switch off, depress the rear of the switch lever.  
Operation (Fig. 7)  
Keep the edge of the wheel or disc at an angle of  
about 15° – 30° to the workpiece surface. During the  
break-in period with a new wheel, do not work the tool  
in the B direction. 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 directions.  
21. Position the tool so that the power cord  
always stays behind the tool during operation.  
22. If working place is extremely hot and humid, or  
WARNING:  
badly polluted by conductive dust, use  
short-circuit breaker (30 mA) to assure opera-  
tor safety.  
a
It should never be necessary to force the tool. The  
weight of the tool applies adequate pressure. Forc-  
ing and excessive pressure could cause dangerous  
wheel breakage.  
23. Do not use the tool on any materials contain-  
ing asbestos.  
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Continued use of a worn-out wheel may result in  
wheel explosion and serious personal injury.  
Depressed center wheel should not be used after it  
has been worn down to 75 mm for Model 9520NB or  
90 mm for Models 9521NB and 9522NB in diam-  
eter.  
MAINTENANCE  
CAUTION:  
Always be sure that the tool is switched off and  
unplugged before carrying out any work on the tool.  
Replacement of carbon brushes (Fig. 8 & 9)  
Whenever carbon brushes must be replaced, they cut  
out the tool automatically. When this occurs, replace  
both carbon brushes at the same time. Use only  
identical carbon brushes.  
To maintain product safety and reliability, repairs,  
maintenance or adjustment should be carried out by a  
Makita Authorized Service Center.  
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. The accessories or  
attachments should be used only in the proper and intended manner.  
Abrasive disc  
Wheel guard  
Lock nut 48  
Depressed center wheel  
(For abrasive disc)  
Lock nut wrench  
Inner flange 40  
(For depressed center wheel)  
Grip  
Lock nut 40  
(For depressed center wheel)  
Rubber pad  
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UK only  
DOUBLE INSULATION  
THE ADDITIONAL COMMENT OF ELECTRICAL CONNECTION  
The tool is double insulated for safety, no earth connection is required.  
CAUTION:  
The tool must be connected to a plug having a rated current greater than that of tool.  
The rated voltage and current appear on the name plate.  
IMPORTANT: The wires in the mains lead are coloured in accordance with the following code.  
NOTE:  
As the colours of the mains lead of the tool may not correspond with the coloured markings  
identifying the terminals in your plug, proceed as follows:  
THE WIRE WHICH IS COLOURED BLUE MUST BE CONNECTED TO THE TERMINAL  
WHICH IS MARKED WITH THE LETTER ``N'' OR COLOURED BLACK. THE WIRE WHICH IS  
COLOURED BROWN MUST BE CONNECTED TO THE TERMINAL WHICH IS MARKED WITH  
THE LETTER ``L'' OR COLOURED RED.  
CAUTION:  
Neither wire is to be connected to earth terminal which is marked with the letter ``E'' or symbol  
`` ''.  
FOR 110 VOLT TOOL, USE PLUGS TO BS4343.  
Made in Japan  
883893-224  
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