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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8
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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
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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.
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Abrasive disc
Wheel guard
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Lock nut 48
Depressed center wheel
(For abrasive disc)
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Lock nut wrench
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Inner flange 40
(For depressed center wheel)
Grip
Lock nut 40
(For depressed center wheel)
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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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