OPERATOR'S MANUAL
8-1/4 in. (209.6 mm) Cordless
Compound Miter Saw
Model MS181
R
O
T
A
T
I
O N
4
3 1 . 6 2
3
0
.5
2
2
15
15
.5
2
2
3 0
2
.6
1
3
5
4
THANK YOU FOR BUYING A RYOBI CORDLESS COMPOUND MITER SAW.
YournewsawhasbeenengineeredandmanufacturedtoRyobi'shighstandardsfordependability, easeofoperation,
and operator safety. Properly cared for, it will give you years of rugged, trouble-free performance.
CAUTION: Carefully read through this entire operator's manual before using your new saw.
Pay close attention to the Rules for Safe Operation, Warnings, and Cautions. If you use your saw properly and only
for what it is intended, you will enjoy years of safe, reliable service.
Please fill out and return the Warranty Registration Card so we can be of future service to you.
Thank you again for buying Ryobi tools.
SAVE THIS MANUAL FOR FUTURE REFERENCE
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RULES FOR SAFE OPERATION
■
DRESS PROPERLY. Do not wear loose clothing,
gloves, neckties, rings, bracelets, or other jewelry.
They can get caught and draw you into moving
parts. Rubber gloves and nonslip footwear are
recommended when working outdoors. Also wear
protective hair covering to contain long hair.
READ ALL INSTRUCTIONS
■
KNOW YOUR POWER TOOL. Read the
operator's manual carefully. Learn the saw's
applications and limitations as well as the
specific potential hazards related to this tool.
■
GUARD AGAINST ELECTRICAL SHOCK BY
PREVENTING BODY CONTACT WITH
GROUNDED SURFACES. For example; pipes,
radiators, ranges, refrigerator enclosures.
■
ALWAYS WEAR SAFETY GLASSES WITH
SIDE SHIELDS. Everyday eyeglasses have only
impact-resistant lenses; they are NOT safety
glasses.
■
■
KEEP GUARDS IN PLACE and in good working
order.
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■
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PROTECT YOUR LUNGS. Wear a face or dust
mask if the cutting operation is dusty.
REMOVE ADJUSTING KEYS AND
PROTECT YOUR HEARING. Wear hearing
protection during extended periods of operation.
WRENCHES. Get in the habit of checking to see
that hex keys and adjusting wrenches are
removed from tool before turning on saw.
SECURE WORK. Use clamps or a vise to hold
work when practical. It's safer than using your
hand and it frees both hands to operate tool.
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■
KEEP THE WORK AREA CLEAN. Cluttered
work areas and work benches invite accidents.
DO NOT leave tools or pieces of wood on the
saw while it is in operation.
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■
DO NOT OVERREACH. Keep proper footing and
balance at all times.
DO NOT USE IN DANGEROUS ENVIRON-
MENTS. Do not use power tools near gasoline or
other flammable liquids, in damp or wet loca-
tions, or expose them to rain. Keep the work
area well lit.
MAINTAIN TOOLS WITH CARE. Keep tools
sharp and clean for better and safer perfor-
mance. Follow instructions for lubricating and
changing accessories.
■
■
DISCONNECT ALL TOOLS. When not in use,
before servicing, or when changing attachments,
blades, bits, cutters, etc., all tools should be
disconnected or battery pack removed.
■
KEEP CHILDREN AND VISITORS AWAY. All
visitors should wear safety glasses and be kept a
safe distance from work area. Do not let visitors
contact tool while operating.
AVOID ACCIDENTAL STARTING. Be sure
switch is in the locked or off position before
inserting battery pack. Carrying tools with your
finger on the switch or inserting the battery pack
into a tool with the switch on invites accidents.
■
■
■
■
MAKE WORKSHOP CHILD-PROOF with
padlocks and master switches, or by removing
starter keys.
DO NOT FORCE THE TOOL. It will do the job
better and safer at the rate for which it was
designed.
■
USE RECOMMENDED ACCESSORIES. The use
of improper accessories may cause risk of injury.
Refer to this operator's manual for recommended
accessories.
USE THE RIGHT TOOL. Do not force the tool or
attachment to do a job it was not designed for.
Don't use it for a purpose not intended.
■
■
NEVER STAND ON TOOL. Serious injury could
occur if the tool is tipped or if the blade is unin-
tentionally contacted.
USE THE PROPER EXTENSION CORD FOR
CHARGER. 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. A wire gage size
(A.W.G.) of at least 16 is recommended for an
extension cord 25 feet or less in length. If in
doubt, use the next heavier gage. The smaller
the gage number, the heavier the cord.
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 moving 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 must be properly repaired or replaced
by an authorized service center to avoid risk of
personal injury.
■
PERIODICALLY INSPECT EXTENSION
CORDS and replace if damaged.
Page 3
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RULES FOR SAFE OPERATION
■
NEVER LEAVE TOOL RUNNING UNAT-
■
NEVER START A TOOL WHEN THE BLADE IS
TENDED. REMOVE BATTERY PACK. Do not
leave tool, move workpiece or make adjustments
until it comes to a complete stop.
IN CONTACT WITH WORKPIECE. Allow motor
to come up to full speed before starting cut.
■
MAKE SURE THE MITER TABLE AND SAW
ARM (BEVEL FUNCTION) ARE LOCKED IN
POSITION BEFORE OPERATING YOUR SAW.
Lock the miter table by securely tightening the
miter lock handle. Lock the saw arm (bevel
function) by securely tightening the bevel lock
knob.
■
■
FIRMLY CLAMP OR BOLT your miter saw to a
workbench or table at approximately hip height.
USE ONLY CORRECT BLADES. Do not use
blades with incorrect size holes. Never use blade
washers or blade bolts that are defective or
incorrect. The maximum blade capacity of your
saw is 8-1/4 in. (209.6 mm).
■
NEVER USE A LENGTH STOP ON THE FREE
SCRAP END OF A CLAMPED WORKPIECE.
NEVER hold onto or bind the free scrap end of
the workpiece in any operation. If a work clamp
and length stop are used together, they must
both be installed on the same side of the saw
table to prevent the saw from catching the loose
end and kicking up.
■
■
KEEP BLADES CLEAN, SHARP AND WITH
SUFFICIENT SET. Sharp blades minimize
stalling and kickback.
DO NOT REMOVE THE SAW'S BLADE
GUARDS. Never operate the saw with any guard
or cover removed. Make sure all guards are
operating properly before each use.
■
■
NEVER cut more than one piece at a time. DO
NOT STACK more than one workpiece on the
saw table at a time.
■
KEEP HANDS AWAY FROM CUTTING AREA.
Keep hands away from blades. Do not reach
underneath work or around or under the blade
while blade is rotating. Do not attempt to remove
cut material when blade is moving.
NEVER PERFORM ANY OPERATION "FREE-
HAND". Always place the workpiece to be cut on
the miter table and position it firmly against and
parallel to the fence as a backstop. Always use
the fence.
■
■
BLADE COASTS AFTER TURN OFF.
DO NOT ABUSE CHARGER CORD. Never yank
cord to disconnect it from receptacle. Keep cord
from heat, oil, and sharp edges.
■
■
■
■
NEVER hand hold a workpiece that is too small
to be clamped. Keep hands clear of the no hands
zone.
■
■
■
INSPECT CHARGER CORD PERIODICALLY
and if damaged, have repaired at your nearest
authorized service center.
NEVER reach behind, under, or within three
inches (76 mm) of the blade and its cutting path
with your hands and fingers for any reason.
DO NOT USE TOOL IF SWITCH DOES NOT
TURN IT ON AND OFF. Have defective switches
replaced by an authorized service center.
NEVER reach to pick up a workpiece, a piece of
scrap, or anything else that is in or near the
cutting path of the blade.
KEEP TOOL DRY, CLEAN, AND FREE FROM
OIL AND GREASE. Always use a clean cloth
when cleaning. Never use brake fluids, gasoline,
petroleum-based products, or any solvents to
clean tool.
AVOID AWKWARD OPERATIONS AND HAND
POSITIONS where a sudden slip could cause
your hand to move into the blade. ALWAYS
make sure you have good balance. NEVER
operate your miter saw on the floor or in a
crouched position.
■
ALWAYS SUPPORT LONG WORKPIECES to
minimize risk of blade pinching and kickback.
Saw may slip, walk, or slide while cutting long or
heavy boards.
■
■
NEVER stand or have any part of your body in
line with the path of the saw blade.
■
■
■
■
BEFORE MAKING A CUT, BE SURE ALL
ADJUSTMENTS ARE SECURE.
ALWAYS release the power switch and allow the
saw blade to stop rotating before raising it out of
the workpiece.
AVOID CUTTING NAILS. Inspect for and
remove all nails from lumber before cutting.
■
DO NOT TURN THE MOTOR SWITCH ON AND
OFF RAPIDLY. This could cause the saw blade
to loosen and could create a hazard. Should this
ever occur, stand clear and allow the saw blade
to come to a complete stop. Disconnect your saw
from the power supply and securely retighten the
blade bolt.
ALWAYS USE A CLAMP to secure the work-
piece when possible.
NEVER TOUCH BLADE or other moving parts
during use.
Page 4
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RULES FOR SAFE OPERATION
■
■
■
REPLACEMENT PARTS. All repairs, whether
electrical or mechanical, should be made at your
nearest authorized service center.
■
Remove battery pack from tool or make sure
the switch is in the lock-off position before
making any adjustments, changing
accessories, storing the tool or when not in
use. Such preventive safety measures reduce
the risk of starting the tool accidentally.
When servicing use only identical Ryobi replace-
ment parts. Use of any other parts may create a
hazard or cause product damage.
■
When battery pack is not in use, keep it away
from metal objects like paper clips, coins,
keys, nails, screws, other small metal objects
as well as necklaces, chains, rings etc. that
can make a connection from one terminal to
another. Shorting the battery terminals together
may cause sparks, burns, or a fire.
NEVER USE IN AN EXPLOSIVE ATMO-
SPHERE. Normal sparking of the motor could
ignite fumes.
■
■
NEVER leave the miter saw unattended while
connected to a power source.
POLARIZED PLUGS. To reduce the risk of
electric shock, this charger has a polarized plug
(one blade is wider than the other). This charger
plug will fit in a polarized outlet only one way. If
the plug does not fit fully in the outlet, reverse
the plug. If it still does not fit, contact a qualified
electrician to install the proper outlet. Do not
change the plug in any way.
■
■
Use battery operated tool only with
specifically designated battery pack. Use of
any other batteries may create a risk of fire. Use
only the battery pack listed.
USE ONLY THE CHARGER PROVIDED WITH
YOUR BATTERY TOOL. Do not substitute any
other charger. Use of another charger could
cause batteries to explode causing possible
serious injury.
■
IF ANY PART OF THIS MITER SAW IS MISS-
ING or should break, bend, or fail in any way, or
should any electrical component fail to perform
properly, release switch trigger, remove the
battery pack and have damaged, missing, or
failed parts replaced before resuming operation.
■
DO NOT PLACE BATTERY TOOLS OR THEIR
BATTERIES NEAR FIRE OR HEAT. Batteries
vent hydrogen gas and can explode in the
presence of heat or a source of ignition, such as
a pilot light. To reduce the risk of serious
personal injury, never use any cordless product in
the presence of open flame. An exploded battery
can propel debris and chemicals. If exposed,
wash immediately with soap and water and
neutralize with lemon juice or vinegar.
■
■
DO NOT OPERATE THIS TOOL WHILE UN-
DER THE INFLUENCE OF DRUGS, ALCOHOL,
OR ANY MEDICATION.
ALWAYS STAY ALERT! Do not allow familiarity
(gained from frequent use of your saw) to cause
a careless mistake. ALWAYS REMEMBER that
a careless fraction of a second is sufficient to
inflict severe injury.
■
■
DO NOT CHARGE BATTERY TOOL IN A
DAMP OR WET LOCATION.
Your battery tool should be charged in a location
where the temperature is more than 50°F (10°C)
but less than 100°F (37°C).
■
■
STAY ALERT AND EXERCISE CONTROL.
Watch what you are doing and use common
sense. Do not operate tool when you are tired.
Do not rush.
■
Under extreme usage or temperature conditions,
battery leakage may occur. If liquid comes in
contact with your skin, wash immediately with
soap and water, then neutralize with lemon juice
or vinegar. If liquid gets in your eyes, flush them
with clean water for at least 10 minutes, then
seek immediate medical attention.
MAKE SURE THE WORK AREA HAS AMPLE
LIGHTING to see the work and that no obstruc-
tions will interfere with safe operation BEFORE
performing any work using your saw.
IMPORTANT SAFETY RULES FOR BATTERY
TOOLS
■
■
If carrying your battery tool at your side, make
sure it is not running and your finger is not on the
switch. Avoid accidental starting.
■
Battery tools do not have to be plugged into an
electrical outlet; therefore, they are always in
operating condition. Be aware of possible
hazards when not using your battery tool or
when changing accessories.
WHEN SERVICING USE ONLY IDENTICAL
RYOBI REPLACEMENT PARTS.
Page 5
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RULES FOR SAFE OPERATION
■
DO NOT OPERATE CHARGER WITH A
DAMAGED CORD OR PLUG. If damaged,
have replaced immediately by a qualified
serviceman.
IMPORTANT SAFETY INSTRUCTIONS FOR
CHARGER
■
■
■
SAVE THESE INSTRUCTIONS. This manual
contains important safety and operating
instructions for charger part number 1423701.
■
Do not operate charger if it has received a
sharp blow, been dropped, or otherwise
damaged in any way; take it to a qualified
serviceman. Following this rule will reduce the
risk of electric shock, fire, or serious personal
injury.
Before using charger, read all instructions and
cautionary markings in this manual, on charger,
and product using charger.
To reduce risk of injury, charge only nickel-
cadmium type rechargeable batteries. Other
types of batteries may burst causing personal
injury and damage.
■
■
Do not disassemble charger; take it to a
qualified serviceman when service or repair is
required. Incorrect reassembly may result in a
risk of electric shock or fire.
■
■
Do not expose charger to wet or damp
conditions.
To reduce risk of electric shock, unplug charger
from outlet before attempting any maintenance
or cleaning. Turning off controls will not reduce
this risk.
Use of an attachment not recommended or sold
by the charger manufacturer may result in a risk
of fire, electric shock, or injury to persons.
■
■
Do not use charger outdoors.
■
■
■
To reduce risk of damage to charger and cord,
pull by charger plug rather than cord when
disconnecting charger.
Disconnect charger from power supply when
not in use.
Make sure cord is located so that it will not be
stepped on, tripped over, or otherwise subjected
to damage or stress.
■
SAVE THESE INSTRUCTIONS. Refer to them
frequently and use them to instruct others who
may use this tool. If you loan someone this tool,
loan them these instructions also.
An extension cord should not be used unless
absolutely necessary. Use of improper
extension cord could result in a risk of fire and
electric shock. If extension cord must be used,
make sure:
WARNING:
Some dust created by power sanding, sawing,
grinding, drilling, and other construction activities
contains chemicals known to cause cancer, birth
defects or other reproductive harm. Some ex-
amples of these chemicals are:
a. That pins on plug of extension cord are the
same number, size and shape as those of
plug on charger.
b. That extension cord is properly wired and in
good electrical condition; and
• lead from lead-based paints,
• crystalline silica from bricks and cement and
other masonry products, and
c. That wire size is large enough for AC
ampere rating of charger as specified
below:
• arsenic and chromium from chemically-treated
lumber.
Cord Length (Feet) 25'
Cord Size (AWG) 16
50' 100'
16 16
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.
Note: AWG = American Wire Gage
WARNING:
The operation of any power tool can result in foreign objects being thrown into your
eyes, which can result in severe eye damage. Before beginning power tool operation,
always wear safety goggles or safety glasses with side shields and a full face shield
when needed. We recommend Wide Vision Safety Mask for use over eyeglasses or
standard safety glasses with side shields. Always use eye protection which is marked
to comply with ANSI Z87.1.
Page 6
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SYMBOLS
Important: Some of the following symbols may be used on your tool. Please study them and learn their meaning.
Proper interpretation of these symbols will allow you to operate the tool better and safer.
SYMBOL
NAME
DESIGNATION/EXPLANATION
Voltage
V
Volts
A
Amperes
Hertz
Current
Hz
min
Frequency (cycles per second)
Time
Minutes
Alternating Current
Direct Current
Type or a characteristic of current
Type or a characteristic of current
---
n
No Load Speed
Rotational speed, at no load
0
.../min
Revolutions or Reciprocation Per Minute
Revolutions, strokes,
surface speed, orbits etc. per minute
Safety Alert Symbol
Indicates danger, warning or caution.
It means attention!!! Your safety is
involved.
The purpose of safety symbols is to attract your attention to possible dangers. The safety symbols,
and the explanations with them, deserve your careful attention and understanding. The safety
warnings do not by themselves eliminate any danger. The instructions or warnings they give are not
substitutes for proper accident prevention measures.
SYMBOL MEANING
SAFETY ALERT SYMBOL:
Indicates danger, warning, or caution. May be used in conjunction with other symbols or
pictographs.
DANGER: Failure to obey a safety warning will result in serious injury to yourself or to others.
Always follow the safety precautions to reduce the risk of fire, electric shock and personal injury.
WARNING:Failuretoobeyasafetywarningcanresultinseriousinjurytoyourselfortoothers.
Always follow the safety precautions to reduce the risk of fire, electric shock and personal injury.
CAUTION: Failure to obey a safety warning may result in property damage or personal injury
to yourself or to others. Always follow the safety precautions to reduce the risk of fire, electric
shock and personal injury.
NOTE: Advises you of information or instructions vital to the operation or maintenance of the equipment.
Page 7
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SYMBOLS
SAFETY AND INTERNATIONAL SYMBOLS
This operator's manual describes safety and international symbols and pictographs that may appear on this
product. Read the operator's manual for complete safety, assembly, operating and maintenance, and repair
information.
MEANING
SYMBOL
•
•
Do not expose to rain or use in damp locations.
NO HANDS SYMBOL
Failure to keep your hands away from the blade will
result in serious personal injury.
SAVE THESE INSTRUCTIONS
GLOSSARY OF TERMS FOR WOODWORKING
Arbor
The shaft on which a blade or cutting tool is mounted.
Revolutions Per Minute (RPM)
The number of turns completed by a spinning object
in one minute.
Bevel Cut
A cutting operation made with the blade at any angle
other than 90° to the miter table.
Saw Blade Path
The area over, under, behind, or in front of the blade.
As it applies to the workpiece, that area which will be,
or has been, cut by the blade.
Crosscut
A cutting or shaping operation made across the grain
of the workpiece.
Set
The distance that the tip of the saw blade tooth is bent
(or set) outward from the face of the blade.
Compound Miter Cut
A compound miter cut is a cut made using a miter
angle and a bevel angle at the same time.
Throat Plate
A plastic throat plate inserted in the miter table that
allows for blade clearance. This provides support near
the kerf that minimizes workpiece tear-out.
Freehand
Performing a cut without using a fence, miter gage,
fixture, work clamp, or other proper device to keep the
workpiece from twisting or moving during the cut.
Throw-Back
Throwing of a workpiece in a manner similar to a
kickback. Usually associated with a cause other than
the kerf closing, such as a workpiece not being
against the fence, being dropped into the blade, or
being placed inadvertently in contact with the blade.
Gum
A sticky, sap based residue from wood products.
Miter Cut
A cutting operation made with the blade at any angle
other than 90° to the fence.
Through Sawing
Any cutting operation where the blade extends
completely through the thickness of the workpiece.
No Hands Zone
The area between the marked lines on the left and
right side of the miter table base. This zone is
identified by no hands zone labels placed inside the
marked lines on the miter table base.
Resin
Workpiece
The item on which the cutting operation is being done.
The surfaces of a workpiece are commonly referred to
as faces, ends, and edges.
A sticky, sap based substance.
Page 8
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UNPACKING
Your Compound Miter Saw has been shipped
completely assembled except for the battery pack,
dust bag or dust guide.
■
Do not discard the packing materials until you have
carefully inspected the saw, identified all loose parts,
and satisfactorily operated your new saw.
■
Your saw has been shipped with the saw arm
locked in the down position. To release saw arm,
push down on top of saw arm and pull out the lock
pin. See Figure 7.
WARNING:
If any parts are missing, do not operate this tool
until the missing parts are replaced. Failure to do
so could result in possible serious personal injury.
■
■
Lift the saw arm by the handle. Hand pressure
should remain on the saw arm to prevent sudden
rise upon release of the lock pin.
■
■
■
Remove all loose parts from the carton. Separate
and check with the list of loose parts. See Figure 1.
Examine all parts to make sure no breakage or
damage has occurred during shipping.
Remove the packing materials from around your
saw.
If any parts are damaged or missing, do not attempt to
turn the switch on until the damaged or missing parts
are obtained and are installed correctly.
Carefully lift saw from the carton and place it on a
level work surface. Although small, this saw is
heavy. To avoid back injury, get help when
needed.
■
If any parts are damaged or missing, please
call 1-800-525-2579 for assistance.
TOOLS NEEDED
The following tools (not included) are needed for checking adjustments of your saw or for installing the blade:
17 mm COMBINATION WRENCH
10 mm COMBINATION WRENCH
PHILLIPS SCREWDRIVER
COMBINATION
SQUARE
FRAMING SQUARE
Fig. 1
Page 9
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LOOSE PARTS LIST
The following items are included with your Compound Miter Saw:
■
■
■
■
Carbide Tipped Saw Blade - 8-1/4 in. (209.6 mm)
■
■
■
■
Work clamp
Dust Bag
5 mm Hex Key
Dust Guide
Blade Wrench
6 mm Hex Key
Operator's Manual (Not Shown)
BLADE WRENCH
DUST GUIDE
6 mm HEX KEY
DUST BAG
R
O
T
I
O
N
5 mm HEX KEY
SAW BLADE
WORK CLAMP
Fig. 2
WARNING:
The use of attachments or accessories not listed can or could be hazardous and
cause serious personal injury.
Page 10
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BATTERY PACK AND CHARGING INFORMATION
LED FUNCTION OF CHARGER
See Figure 3.
GREEN LIGHT "ON"
INDICATES FULLY
CHARGED
BATTERY
CHARGER
LED WILL BE LIGHTED TO INDICATE STATUS OF
CHARGER AND BATTERY PACK:
■ Red LED lighted = Fast Charging Mode
■ Green LED lighted = Fully Charged Battery Pack
■ Yellow and Green LED Lighted = Control Charge or
possible faulty battery.
CHARGING BATTERY PACK
The battery pack for this tool has been shipped in a
low charge condition to prevent possible problems.
Therefore, you should charge it prior to use.
RED LIGHT "ON"
INDICATES FAST
CHARGING MODE
YELLOW AND GREEN LIGHTS "ON"
INDICATES CONTROL CHARGE OR
POSSIBLE FAULTY BATTERY
Note: Batteries will not reach full charge the first time
they are charged. Allow several cycles (cutting
followed by recharging) for them to fully charge.
Fig. 3
BATTERY
CHARGER
WARNING:
RISK OF ELECTRIC SHOCK. DO NOT TOUCH
UNINSULATED PORTION OF OUTPUT
CONNECTOR OR UNINSULATED BATTERY
TERMINAL.
TO CHARGE
■ Charge battery pack only with the charger pro-
vided.
■ Make sure power supply is normal house
voltage, 120 volts, 60 Hz, AC only.
■ Connect charger to power supply.
BATTERY
PACK
■ Place battery pack in charger. See Figure 4. Align
raised rib on battery pack with groove in charger.
■ Press down on battery pack to be sure contacts on
battery pack engage properly with contacts in
charger. When properly connected, red light will
turn on.
■ Normally, the yellow and green lights on the
charger will come on. This indicates charger is in
control charge mode and should switch to fast
charge mode within 5 minutes. When charger is in
fast charge mode the red light will come on. If after
a period of 15 minutes the yellow and green lights
remain on, remove the battery pack, wait 1 minute
and reinsert battery pack in charger. If the yellow
and green lights continue to remain on an addi-
tional 15 minutes, the battery pack is damaged and
will not accept charge.
■ When your battery pack becomes fully charged,
the red light will turn off and the green light will turn
on.
■ After normal usage, 1 hour of charge time is
required to be fully charged. A minimum charge
time of 1 to 1-1/2 hours is required to recharge a
completely discharged tool.
Fig. 4
■ The battery pack will become slightly warm to the
touch while charging. This is normal and does not
indicate a problem.
■ DO NOT place charger in an area of extreme heat
or cold. It will work best at normal room tempera-
ture.
IMPORTANT INFORMATION FOR RECHARG-
ING HOT BATTERIES
When using your saw continuously, the batteries in
your battery pack become hot. You should let a hot
battery pack cool down for approximately 30 minutes
before attempting to recharge.
Note: This situation occurs when continuous use of
your saw causes the batteries to become hot. It does
not occur under normal circumstances. Refer to
"Charging Battery Pack" for normal recharging of
batteries. If the charger does not charge your battery
pack under normal circumstances, return both the
battery pack and charger to your nearest Ryobi
Authorized Service Center for electrical check.
Page 11
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FEATURES
KNOW YOUR COMPOUND MITER SAW
See Figure 5.
CUTTING CAPACITIES
When the miter angle (miter table) is set at 0° and
Before attempting to use your saw, familiarize yourself
with all operating features and safety requirements.
the bevel angle is set at 0°:
Your saw will cut materials up to a maximum of
5-1/2 in. (139.7 mm) wide x 2-1/16 in. (52.4 mm)
thick.
WARNING:
When the miter angle (miter table) is set at 45° and
the bevel angle is set at 0°:
Do not allow familiarity with your saw to make you
careless. Remember that a careless fraction of a
second is sufficient to inflict severe injury.
Your saw will cut materials up to a maximum of
3-3/4 in. (95.3 mm) wide x 2-1/16 in. (52.4 mm) thick.
When the miter angle (miter table) is set at 0° and
the bevel angle is set at 45°:
8-1/4 in. (209.6 mm) BLADE
A 8-1/4 in. (209.6 mm) saw blade is included with your
compound miter saw. It will cut materials up to
2-1/16 in. (52.4 mm) thick or 5-1/2 in. (139.7 mm)
wide, depending upon the thickness of the material
and the setting at which the cut is being made.
Your saw will cut materials up to a maximum of
5-1/2 in. (139.7 mm) wide x 1-1/2 in. (38.1 mm) thick.
When the miter angle (miter table) is set at 45° and
the bevel angle is set at 45°:
Your saw will cut materials up to a maximum of
3-3/4 in. (95.3 mm) wide x 1-1/2 in. (38.1 mm) thick.
SAW ARM
CARRYING HANDLE
DUST BAG
SPINDLE LOCK
BUTTON
LOCK-OFF
BUTTON
UPPER
BLADE GUARD
2
DUST GUIDE
SWITCH
TRIGGER
R
O
T
LOWER
BLADE GUARD
BEVEL
LOCK KNOB
A
T
I
O
N
NO HANDS
ZONE LABEL
BEVEL SCALE
FENCE
5
4
3 1 . 6 2
3
0
.5
2
2
THROAT PLATE
15
15
22.5
3 0
2
.6
1
3
5
4
MITER
TABLE FRAME
MITER SCALE
MITER TABLE
"NO HANDS ZONE"
BOUNDARY LINE
Fig. 5
Page 12
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FEATURES
SPINDLE LOCK BUTTON
See Figure 8.
CARRYING HANDLE
See Figure 6.
A spindle lock button has been provided for locking
the spindle which keeps the blade in your saw from
rotating. Depress and hold the spindle lock button
while installing, changing, or removing the blade only.
For convenience when carrying or transporting your
miter saw from one place to another, a carrying
handle has been provided on top of the saw arm as
shown in figure 6. To transport saw, remove battery
pack, then lower the saw arm and lock it in the down
position. Lock saw arm by depressing the lock pin.
SPINDLE LOCK
BUTTON
CARRYING
HANDLE
.
Fig. 8
LOCK-OFF BUTTON
See Figure 9.
The switch trigger is equipped with a lock-off button to
reduce the possibility of accidental starting.
SAW ARM LOCKED
IN DOWN POSITION
Fig. 6
LOCK PIN
To release lock-off feature:
■
■
Depress lock-off button (1).
MITER TABLE CLAMP
See Figure 7.
While holding lock-off button pushed in, (2)
depress switch trigger.
The miter table clamp securely locks your saw at
desired miter angles.
■
Release lock-off button (3).
Note: The spring loaded button will spring back
into the lock-off position when the switch trigger is
released.
SAW ARM
UNLOCK
LOCK
LOCK-OFF
BUTTON
1
2
3
.
MITER TABLE
CLAMP (IN
LOCKED
POSITION)
SWITCH
LOCK PIN
31.62
4
5
Fig. 7
Fig. 9
Page 13
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FEATURES
Your compound miter saw should be permanently
TRIGGER LOCK
See Figure 10.
mounted to a firm supporting surface such as work-
bench. Four 3/8 in. (10 mm) bolt holes have been
provided in the saw base for this purpose. Each of the
four mounting holes should be bolted securely using
3/8 in. (10 mm) machine bolts, lock washers, and hex
nuts (not included). Bolts should be of sufficient length
to accommodate the saw base, lock washers, hex
nuts, and the thickness of the workbench. Tighten all
four bolts securely.
To prevent unauthorized use of your compound miter
saw, we suggest that you remove battery pack and
lock the switch in the off position. To lock the switch,
install a padlock through the hole in the switch trigger.
A lock with a shackle up to 13/64 in. (5.2 mm) diam-
eter may be used. When the lock is installed and
locked, the switch is inoperable. Store the padlock key
in another location.
The hole pattern for an 18-5/8 in. x 24 in. (457.2 mm x
609.6 mm) workbench is shown in Figure 11. Care-
fully check the workbench after mounting to make
sure that no movement can occur during use. If any
tipping, sliding, or walking is noted, secure the work-
bench to the floor before operating.
SWITCH TRIGGER
WARNING:
Always make sure your compound miter saw is
securely mounted to a workbench or an approved
workstand. Failure to do so could result in an
accident resulting in possible serious personal injury.
PADLOCK
5 in.
(12.7 cm)
Fig. 10
18-5/8 in.
18
(47.3 cm)
DETENT STOPS ON MITER TABLE
9-3/4”
8-5/8 in.
(21.9 cm)
Detent stops have been provided at 0°, 22-1/2°, 30°,
and 45°. The 22-1/2°, 30° and 45° detent stops have
been provided on both the left and right side of the
miter table.
7/16 in. (11 mm)
7/16” DIIA. HOLE
Dia. Hole
5 in.
(12.7 cm)
14-7/16 in.
(36.7 cm)
4-3/4 in.
3-3/4”
(12 cm)
4-3/4 in.
(12 cm)
BEVEL LOCK KNOB
24 in.
(60.96 cm)
The bevel lock knob securely locks your compound
miter saw at desired bevel angles. Positive stop
adjustment screws have been provided on each side
of the saw arm. These positive stop adjustment
screws are for making fine adjustments at 0° and 45°.
See pages 20 and 21.
Fig. 11
WARNING:
The operation of any saw can result in foreign objects
being thrown into your eyes, which can result in
severe eye damage. Before starting power tool
operation, always wear safety goggles or safety
glasses with side shields and a full face shield when
needed. We recommend wide vision safety mask for
use over eyeglasses or standard safety glasses with
side shields.
ELECTRIC BRAKE
An electric brake has been provided to quickly stop
blade rotation after the switch is released.
FENCE
The fence on your compound miter saw has been
provided to hold your workpiece securely against
when making all cuts.
SELF-RETRACTING LOWER BLADE GUARD
WARNING:
The lower blade guard is made of shock-resistant,
see-through plastic that provides protection from each
side of the blade. It retracts over the upper blade
guard as the saw is lowered into the workpiece.
Do not attempt to modify this tool or create
accessories not recommended for use with this tool.
Any such alteration or modification is misuse and
could result in a hazardous condition leading to
possible serious personal injury.
MOUNTING HOLES
See Figure 11.
Page 14
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ADJUSTMENTS
squeeze the two metal clips to open the mouth of the
bag and slide it on the exhaust port. Release the clips.
The metal ring in the bag should lock in one of the
grooves on the exhaust port. For more efficient
operation, empty dust bag when no more than half
full. This will permit better air flow through the bag.
WARNING:
To prevent accidental starting that could cause
possible serious personal injury, assemble all parts
to your saw before attaching battery pack. Battery
pack should never be attached to saw when you
are assembling parts, making adjustments,
installing or removing blades, or when not in use.
DUST BAG
As mentioned previously your saw has been factory
assembled and adjusted. The dust guide or dust bag,
battery pack and blade are the only parts that have to
be installed.
METAL CLIPS
DUST GUIDE
See Figure 12.
■
Remove battery pack from saw.
WARNING:
EXHAUST
PORT
Failure to remove battery pack from your saw
could result in accidental starting causing possible
serious personal injury.
R
O
T
A
T
I
O
N
To install the dust guide, place the end marked
INSERT over the exhaust port in the upper blade
guard. Turn the guide so that the open end is facing
down or toward the rear of the saw.
Fig. 13
WORK CLAMP
See Figure 14.
EXHAUST
PORT
■
Remove battery pack from saw.
WARNING:
Failure to remove battery pack from your saw
could result in accidental starting causing possible
serious personal injury.
To install work clamp, place the shaft of the clamp in
either hole in front of the miter table base. Rotate the
knob on the clamp to move it in or out as needed.
DUST GUIDE
R
O
T
A
T
I
O
N
Fig. 12
5
4
DUST BAG
See Figure 13.
3 1 . 6 2
3
0
22.5
15
■
Remove battery pack from saw.
15
.5
2
2
3 0
31.62
5
4
WARNING:
Failure to remove battery pack from your saw
could result in accidental starting causing possible
serious personal injury.
A dust bag is packed with your saw. It fits over the
exhaust port on the upper blade guard. To install it,
remove the dust guide from the exhaust port. Then,
KNOB
WORK CLAMP
Fig. 14
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ADJUSTMENTS
TO INSTALL BLADE
See Figures 15, 16, 17 and 18.
LOWER
BLADE GUARD
LOWER BLADE
GUARD BRACKET
DANGER:
A 8-1/4 in. (209.6 mm) blade is the maximum blade
capacity of your saw. Never use a blade that is too
thick to allow outer blade washer to engage with
the flats on the spindle. Larger blades will come in
contact with the blade guards, while thicker blades
will prevent the blade bolt from securing the blade
on the spindle. Either of these situations will result
in a serious accident and can cause serious
personal injury.
NOTCH
PHILLIPS
SCREW
■
Remove battery pack from saw.
WARNING:
Failure to remove battery pack from your saw could
result in accidental starting causing possible serious
personal injury.
BLADE BOLT
Fig. 16
LOWER
BLADE GUARD
BLADE
BOLT COVER
■
Push down on the saw arm and pull out the lock
pin to release saw arm. Raise saw arm to its full
raised position. Be cautious, saw arm is spring
loaded to raise.
■
■
Loosen the phillips screw on the blade bolt
cover until blade bolt cover can be raised.
See Figure 15.
Gently raise the lower blade guard bracket,
releasing lower blade guard from notch so that
lower blade guard and blade bolt cover can be
rotated up and back to expose the blade bolt.
See Figure 16.
BLADE BOLT COVER
PHILLIPS SCREW
PHILLIPS
SCREW
FLAT (S)
ON SPINDLE
TO
LOOSEN
INNER BLADE
WASHER WITH
DOUBLE "D" FLATS
R
O
T
A
T
I
O
N
R
O
T
A
T
I
O
N
TO
TIGHTEN
Fig. 15
BLADE
BLADE BOLT
OUTER BLADE WASHER
WITH DOUBLE "D" FLATS
Fig. 17
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ADJUSTMENTS
■
■
Depress the spindle lock button and rotate the
blade bolt until the spindle locks. See Figure 18.
TO REMOVE BLADE
See Figures 15, 16, 17, and 18.
Using the blade wrench provided, loosen and
remove the blade bolt.
■
Remove battery pack from saw.
Note: The blade bolt has left hand threads. Turn
blade bolt clockwise to loosen.
WARNING:
Failure to remove battery pack from your saw
could result in accidental starting causing possible
serious personal injury.
■
■
Remove outer blade washer. Do not remove
inner blade washer.
Wipe a drop of oil onto inner blade washer and
outer blade washer where they contact the blade.
■
Loosen the phillips screw on the blade bolt
cover until blade bolt cover can be raised.
See Figures 15, 16, and 17.
WARNING:
■
Gently raise the lower blade guard bracket,
releasing lower blade guard from notch so that
lower blade guard and blade bolt cover can be
rotated up and back to expose the blade bolt.
See Figure 16.
If inner blade washer has been removed, replace it
before placing blade on spindle. Failure to do so
could cause an accident since blade will not tighten
properly.
■
■
Depress the spindle lock button and rotate the
blade bolt until the spindle locks. See Figure 18.
■
Fit saw blade inside lower blade guard and onto
spindle. The blade teeth point downward at the
front of saw as shown in figure 17.
Using the blade wrench provided, loosen and
remove the blade bolt.
Note: The blade bolt has left hand threads. Turn
blade bolt clockwise to loosen.
CAUTION:
Always install the blade with the blade teeth and
the arrow printed on the side of the blade pointing
down at the front of the saw. The direction of blade
rotation is also stamped with an arrow on the upper
blade guard.
■
Remove outer blade washer. The blade can now
be removed.
Your compound miter saw has been adjusted at the
factory for making very accurate cuts. However, some
of the components might have been bumped out of
alignment during shipping. Also, over a period of time,
readjustment will probably become necessary due to
wear. After unpacking your saw, check the following
adjustments before you begin using saw. Make any
readjustments that are necessary and periodically
check the parts alignment to make sure that your saw
is cutting accurately.
■
Replace outer blade washer. The double "D" flats
on the blade washers align with the flats on the
spindle.
■
Depress spindle lock button and replace blade bolt.
Note: The blade bolt has left hand threads. Turn
blade bolt counterclockwise to tighten.
■
■
■
■
Using the blade wrench provided, tighten blade
bolt securely.
Remove the blade wrench and store it in a safe
place for future use.
SPINDLE LOCK
BUTTON
Replace the lower blade guard and blade bolt
cover.
Retighten phillips screw securing blade bolt cover.
Tighten screw securely. See Figure 17.
.
WARNING:
To prevent damage to the spindle lock, always
allow motor to come to a complete stop before
engaging spindle lock. Make sure the spindle lock
button is not engaged before attaching battery
pack.
Fig. 18
Page 17
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ADJUSTMENTS
Note: Many of the illustrations in this manual show
■
If the edge of the framing square and the throat
plate in the miter table are not parallel as shown
in figures 20 and 21, adjustments are needed.
only portions of your compound miter saw. This is
intentional so that we can clearly show points being
made in the illustrations. Never operate your saw
without all guards securely in place and in good
operating condition.
FENCE
FRAMING
SQUARE
SQUARING THE MITER TABLE
TO THE FENCE
See Figures 19 – 22.
■
Remove battery pack from saw.
WARNING:
4
5
5
4
31.62
2
.6
1
3
Failure to remove battery pack from your saw
could result in accidental starting causing possible
serious personal injury.
3
0
3
0
22.5
22.5
1
5
MITER TABLE
THROAT PLATE
■
Push down on the saw arm and pull out the lock
pin to release the saw arm.
VIEW OF MITER TABLE NOT SQUARE WITH
FENCE, ADJUSTMENTS ARE REQUIRED
■
■
■
Raise saw arm to its full raised position.
Lift the miter table clamp.
Fig. 20
FENCE
FRAMING
SQUARE
Rotate the miter table until the pointer is posi-
tioned at 0°.
■
■
Push the miter table clamp back down.
Lay a framing square flat on the miter table. Place
one leg of the square against the fence. Place the
other leg of the square beside the throat plate in
the miter table. The edge of the square and the
throat plate in the miter table should be parallel as
shown in figure 19.
4
5
5
4
31.62
2
.6
1
3
3
0
3
0
22.5
22.5
1
5
MITER
TABLE CLAMP
FENCE
FRAMING
SQUARE
MITER TABLE
THROAT PLATE
VIEW OF MITER TABLE NOT SQUARE WITH
FENCE, ADJUSTMENTS ARE REQUIRED
Fig. 21
4
5
5
4
31.62
2
.6
1
3
3
0
3
0
22.5
1
5
THROAT PLATE
MITER TABLE
VIEW OF MITER TABLE SQUARE WITH
FENCE AND CORRECTLY ADJUSTED
Fig. 19
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ADJUSTMENTS
■
The edge of the square and the saw blade should
be parallel as shown in figure 23.
■
Using a 6 mm hex key, loosen the socket head
screws securing the fence. See Figure 22. Adjust
the fence left or right until the framing square and
throat plate are parallel.
6 mm SOCKET
HEAD SCREW(S)
FENCE
5
5
4
31.62
30
.5
22
5
1
45
0
31
.6
3
0
2
15
22.5
BLADE
4
5
5
FRAMING SQUARE
MITER TABLE
31.6
31.6
30
30
2
2
.5
.5
2
2
15
15
VIEW OF BLADE
SQUARE WITH FENCE
0
Fig. 23
FENCE
Fig. 22
■
If the front or back edge of the saw blade angles
away from the square as shown in figures 24 and
25, adjustments are needed.
■
Retighten the screws securely and recheck the
fence-to-table alignment.
SQUARING THE SAW BLADE TO THE FENCE
See Figures 23 – 26.
■
Remove battery pack from saw.
FENCE
WARNING:
Failure to remove battery pack from your saw
could result in accidental starting causing possible
serious personal injury.
5
45
31.62
30
.5
2
2
15
■
Pull the saw arm all the way down and engage
the lock pin to hold the saw arm in transport
position.
4
5
0
31.62
3
0
15
22.5
BLADE
FRAMING SQUARE
■
■
Lift the miter table clamp.
MITER TABLE
Rotate the miter table until the pointer is posi-
tioned at 0°.
VIEW OF BLADE NOT SQUARE WITH
FENCE, ADJUSTMENTS ARE REQUIRED
■
■
Push the miter table clamp back down.
Lay a framing square flat on the miter table. Place
one leg of the square against the fence. Slide the
other leg of the square against the flat part of saw
blade.
Fig. 24
Note: Make sure that the square contacts the flat
part of the saw blade, not the blade teeth.
Page 19
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ADJUSTMENTS
SQUARING THE BLADE TO THE
MITER TABLE
See Figures 27 – 31.
FENCE
■
Remove battery pack from saw.
WARNING:
Failure to remove battery pack from your saw
could result in accidental starting causing possible
serious personal injury.
5
45
31.62
30
5
.
2
2
15
45
0
■
Pull the saw arm all the way down and engage
the lock pin to hold the saw arm in transport
position.
31.62
3
0
15
22.5
BLADE
FRAMING SQUARE
■
■
Lift up the miter table clamp.
MITER TABLE
Rotate the miter table until the pointer is posi-
tioned at 0°.
VIEW OF BLADE NOT SQUARE WITH
FENCE, ADJUSTMENTS ARE REQUIRED
■
■
Push the miter table clamp back down.
Fig. 25
Loosen bevel lock knob and set saw arm at 0°
bevel (blade set 90° to miter table). Tighten bevel
lock knob.
■
Using the 6 mm hex key provided, loosen the
socket head screws that secure the mounting
bracket to the miter table. See Figure 26.
■
Place a combination square against the miter
table and the flat part of saw blade.
Note: Make sure that the square contacts the flat
part of the saw blade, not the blade teeth.
■
■
Rotate the blade by hand and check the blade-to-
table alignment at several points.
The edge of the square and the saw blade should
be parallel as shown in figure 27.
R
O
T
A
T
I
O
N
6 mm SOCKET
HEAD SCREW(S)
FENCE
15
22.5
0
3
2
.6
1
3
5
6 mm
HEX KEY
MOUNTING
BRACKET
MITER TABLE
5
45
2
.6
1
3
30
.5
2
2
15
Fig. 26
45
0
31.62
30
15
22.5
BLADE
■
■
Rotate the mounting bracket left or right until the
saw blade is parallel with the square.
MITER TABLE
COMBINATION
SQUARE
Retighten the screws securely and recheck the
blade-to-fence alignment.
VIEW OF BLADE SQUARE
WITH MITER TABLE
Fig. 27
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ADJUSTMENTS
■
If the top or bottom of the saw blade angles away
from the square as shown in figures 28 and 29,
adjustments are needed.
■
Using a 10 mm wrench or adjustable wrench,
loosen the lock nut securing positive stop adjust-
ment screw. Also loosen bevel lock knob.
■
Adjust positive stop adjustment screw to bring
saw blade into alignment with the square.
See Figure 30.
MITER TABLE
FENCE
POSITIVE STOP
ADJUSTMENT SCREW
5
5
4
2
6
.
1
3
3
30
0
22.5
1 5
15
FOR 0° ANGLES
45
0
31.62
3
0
15
22.5
BLADE
MITER TABLE
COMBINATION
SQUARE
VIEW OF BLADE NOT SQUARE WITH MITER
TABLE, ADJUSTMENTS ARE REQUIRED
LOCK NUT(S)
Fig. 28
POSITIVE
STOP ADJUSTMENT
SCREW FOR 45° ANGLES
FENCE
Fig. 30
■
Retighten bevel lock knob. Next, retighten lock nut
securing the positive stop adjustment screw.
Recheck blade-to-table alignment.
5
45
Note: The above procedure can be used to check
blade squareness of the saw blade to the miter
table at both 0° and 45° angles.
31.62
30
22.5
15
45
0
31.6
2
30
15
22.5
BLADE
MITER TABLE
COMBINATION
SQUARE
VIEW OF BLADE NOT SQUARE WITH MITER
TABLE, ADJUSTMENTS ARE REQUIRED
Fig. 29
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ADJUSTMENTS
■
Use the 5 mm hex key provided to adjust the
PIVOT ADJUSTMENTS
Note: These adjustments were made at the factory
and normally do not require readjustment.
depth stop adjustment screw. The saw blade is
lowered by turning the screw counterclockwise
and raised by turning the screw clockwise.
TRAVEL PIVOT ADJUSTMENT
■
The saw arm should rise completely to the up
position by itself.
DEPTH STOP
ADJUSTMENT
SCREW
■
If the saw arm does not raise by itself or if there is
play in the pivot joints, have saw repaired at your
nearest RYOBI AUTHORIZED SERVICE CEN-
TER.
HEX NUT
3 0
BEVEL PIVOT ADJUSTMENT
1
5
■
Your compound miter saw should bevel easily by
loosening bevel lock knob and tilting saw arm to
the left.
■
If movement is tight or if there is play in the pivot,
have saw repaired at your nearest RYOBI
AUTHORIZED SERVICE CENTER.
BEVEL
LOCK KNOB
DEPTH STOP
MITER TABLE
The depth stop limits the blade's downward travel. It
allows the blade to go below the miter table enough to
maintain full cutting capacities. The depth stop
positions the blade 1/4 in. (6.4 mm) from the miter
table support.
Fig. 31
■
■
Lower the blade into the throat plate of the miter
table. Check blade clearance and maximum
cutting distance (distance from fence where blade
enters) to front of miter table slot.
Note: The miter table support is located inside miter
table.
The depth stop is factory set to provide maximum
cutting capacity for the 8-1/4 in. (209.6 mm) saw
blade provided with your saw. Therefore, the saw
blade provided should never need adjustments.
Readjust if necessary.
WARNING:
However, when the diameter of the blade has been
reduced due to sharpening, it may be necessary to
adjust the depth stop to provide maximum cutting
capacity. Also, when a new blade is installed, it is
necessary to check the clearance of the blade to the
miter table support before starting the saw. Make
adjustments if needed.
Do not install battery pack or start your compound
miter saw without checking for any interference
with the blade. If the blade strikes any part of the
table or frame, serious injury or damage to the saw
could result.
■
Tighten the hex nut with a 17 mm wrench or
adjustable wrench.
DEPTH STOP ADJUSTMENTS
See Figure 31.
■
To prevent the depth stop adjustment screw from
turning while tightening the hex nut, carefully hold
it with the hex key while tightening the hex nut.
■
Remove battery pack from saw.
WARNING:
Failure to remove battery pack from your saw
could result in accidental starting causing possible
serious personal injury.
■
To adjust the depth stop use a 17 mm wrench or
adjustable wrench and loosen the hex nut at the
rear of the miter saw arm.
Page 22
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OPERATION
TO REMOVE BATTERY PACK
See Figure 32.
WARNING:
Always wear safety goggles or safety glasses with
side shields when operating tools. Failure to do so
could result in objects being thrown into your eyes,
resulting in possible serious injury.
■
Locate latches on each side of battery pack and
depress to release battery pack from your saw.
■
Remove battery pack from your saw.
APPLICATIONS
(Use only for the purposes listed below)
After all parts have been assembled properly and
adjustments have been made to saw, battery pack
can now be attached to saw.
■
■
Cross cutting wood and plastic.
Cross cutting miters, joints, etc. for picture frames,
moldings, door casings, and fine joinery.
TO INSTALL BATTERY PACK
See Figure 32.
Note: The carbide tipped blade provided is fine for
most wood cutting operations. For fine joinery cuts or
cutting plastic, use one of the accessory blades
available from your Ryobi dealer.
■
Place battery pack in your saw. Align raised rib on
battery pack with groove inside saw.
DEPRESS LATCHES TO
RELEASE BATTERY PACK
LATCHES
WARNING:
Before starting any cutting operation, clamp or bolt
your compound miter saw to a workbench. Never
operate your miter saw on the floor or in a
crouched position. Failure to heed this warning can
result in serious personal injury.
WARNING:
Do not attempt to operate this tool until you have
read thoroughly and understand completely all
instructions, safety rules, etc. contained in this
manual. Failure to comply can result in accidents
involving fire, electric shock, or serious personal
injury. Save operator's manual and review
frequently for continuing safe operation, and
instructing others who may use this tool.
BATTERY
PACK
Fig. 32
■
Make sure the latches on each side of your battery
pack snap in place and battery pack is secured in
saw before beginning operation.
CAUTION:
When placing battery pack in your saw, be sure
raised rib on battery pack aligns with groove inside
saw and latches snap into place properly. Improper
assembly of battery pack can cause damage to
internal components.
WARNING:
Remove battery pack from tool when not in use,
changing blades, or making adjustments.
Page 23
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OPERATION
CUTTING WITH YOUR COMPOUND
MITER SAW
Note: You can quickly locate 0°, 22-1/2° left or
right, 30° left or right, and 45° left or right on the
scale. The miter table can be seated in one of the
detent stop notches, located in the miter table
frame.
WARNING:
When using a work clamp or C-clamp to secure
your workpiece, clamp workpiece on one side of
the blade only. The workpiece must remain free on
one side of the blade to prevent the blade from
binding in workpiece. The workpiece binding the
blade will cause motor stalling and kickback. This
situation could cause an accident resulting in
possible serious personal injury.
WARNING:
To avoid serious personal injury, always push the
miter table clamp back down before making a cut.
Failure to do so could result in movement of the
miter table while making a cut.
■
Place the workpiece flat on the miter table with
one edge securely against the fence. If the board
is warped, place the convex side against the
fence. If the concave edge of a board is placed
against the fence, the board could collapse on the
blade at the end of the cut, jamming the blade.
See Figures 40 and 41.
CROSSCUTTING
See Figure 33.
A crosscut is made by cutting across the grain of the
workpiece. A 90° crosscut is made with the miter table
set at the zero degree position. Miter crosscuts are
made with the miter table set at some angle other
than zero.
■
When cutting long pieces of lumber or molding,
support the opposite end of the stock with a roller
stand or with a work surface level with the saw
table.
■
■
Align cutting line on the workpiece with the edge
of saw blade.
Grasp the stock firmly with one hand and secure
it against the fence. Use the work clamp or a C-
clamp to secure the workpiece when possible.
See Figure 33.
R
O
T
A
T
I
O
N
WARNING:
To avoid serious personal injury, keep your hands
outside the no hands zone; at least 3 in. (8 cm)
from blade. Never perform any cutting operation
freehand (without holding workpiece against the
fence). The blade could grab the workpiece if it
slips or twists.
5
4
2
6
.
1
3
3
0
.
5
2
2
5
1
15
.5
2
2
3 0
31.62
5
4
■
Before turning on the saw, perform a dry run of the
cutting operation just to make sure that no
problems will occur when the cut is made.
■
Grasp the saw handle firmly, depress the lock-off
button, then squeeze the switch trigger. Allow
several seconds for the blade to reach maximum
speed.
WORK CLAMP
90°
CROSSCUT
Fig. 33
■
■
Slowly lower the blade into and through the
workpiece. See Figure 33.
TO CROSSCUT WITH YOUR MITER SAW:
Release the switch trigger and allow the saw
blade to stop rotating before raising the blade out
of workpiece.
■
Pull out the lock pin and lift saw arm to its full
height.
■
■
Lift the miter table clamp.
Rotate the miter table until the pointer aligns with
the desired angle on the miter scale.
■
Push the miter table clamp back down.
Page 24
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OPERATION
blade at the end of the cut, jamming the blade.
See Figures 40 and 41.
BEVEL CUT
See Figures 34 and 35.
■
When cutting long pieces of lumber or molding,
support the overhanging end(s) of the stock with a
roller stand or with a work surface level with the
saw table.
A bevel cut is made by cutting across the grain of the
workpiece with the blade angled to the fence and
miter table. A bevel cut is made with the miter table
set at the zero degree position and the blade set at an
angle between 0° and 45°.
■
■
Align the cutting line on the workpiece with the
edge of saw blade.
INDICATOR
POINT
Grasp the stock firmly with one hand and secure it
against the fence. Use the work clamp or a C-
clamp to secure the workpiece when possible.
See Figure 35.
3 0
1 5
BEVEL CUT
SCALE
BEVEL
LOCK KNOB
MOUNTING
BRACKET
Fig. 34
5
4
3
1
.
6
2
0
3
2
2
.
5
15
TO BEVEL CUT WITH YOUR MITER SAW:
5
1
5
22
2.5
3 0
2
31
1.66
4 5
■
Pull out the lock pin and lift saw arm to its full
height.
■
■
Lift the miter table clamp.
C-CLAMP
Fig. 35
Rotate the miter table until the pointer aligns with
zero on the miter scale.
■
Push the miter table clamp back down.
WARNING:
Note: You can quickly locate zero on the scale.
The miter table can be seated in one of the built-in
detent stops, located in the miter table frame.
To avoid serious personal injury, always keep your
hands outside the no hands zone; at least 3 in.
(8 cm) from blade. Never perform any cutting
operation freehand (without holding workpiece
against the fence). The blade could grab the
workpiece if it slips or twists.
WARNING:
To avoid serious personal injury, always push the
miter table clamp back down before making a cut.
Failure to do so could result in movement of the
miter table while making a cut.
■
Before turning on the saw, perform a dry run of
the cutting operation just to make sure that no
problems will occur when the cut is made.
■
Loosen the bevel lock knob and move the saw
arm to the left to the desired bevel angle.
■
Grasp the saw handle firmly, depress the lock-off
button, then squeeze the switch trigger. Allow
several seconds for the blade to reach maximum
speed.
■
■
■
Bevel angles can be set from 0° to 45°.
Align the indicator point with the desired angle.
Once the saw arm has been set at the desired
angle, securely tighten the bevel lock knob.
■
■
Slowly lower the blade into and through the
workpiece. See Figure 35.
■
Place the workpiece flat on the miter table with
one edge securely against the fence. If the board
is warped, place the convex side against the
fence. If the concave edge of a board is placed
against the fence, the board could collapse on the
Release the switch trigger and allow the saw
blade to stop rotating before raising the blade out
of workpiece. Wait until the electric brake stops
blade from turning before removing the workpiece
from miter table.
Page 25
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OPERATION
COMPOUND MITER CUT
See Figures 36 and 37.
TO MAKE A COMPOUND CUT WITH YOUR
MITER SAW:
A compound miter cut is a cut made using a miter
angle and a bevel angle at the same time. This type of
cut is used to make picture frames, cut molding, make
boxes with sloping sides, and for certain roof framing
cuts.
■
■
■
Pull out the lock pin and lift saw arm to its full height.
Lift the miter table clamp.
Rotate the miter table until the pointer aligns with
the desired angle on the miter scale.
■
Push the miter table clamp back down.
To make this type of cut the miter table must be
rotated to the correct angle and the saw arm must be
tilted to the correct bevel angle. Care should always
be taken when making compound miter setups due to
the interaction of the two angle settings.
Note: You can quickly locate 0°, 22-1/2° left or
right, 30° left or right, and 45° left or right on the
scale. The miter table can be seated in one of the
detent stop notches, located in the miter table
frame.
Adjustments of miter and bevel settings are interde-
pendent with one another. Each time you adjust the
miter setting you change the effect of the bevel
setting. Also, each time you adjust the bevel setting
you change the effect of the miter setting.
WARNING:
To avoid serious personal injury, always push the
miter table clamp back down before making a cut.
Failure to do so could result in movement of the miter
table while making a cut.
It may take several settings to obtain the desired cut.
The first angle setting should be checked after setting
the second angle, since adjusting the second angle
affects the first.
■
Loosen the bevel lock knob and move the saw
arm to the left to the desired bevel angle.
Once the two correct settings for a particular cut have
been obtained, always make a test cut in scrap
material before making a finish cut in good material.
■
■
■
Bevel angles can be set from 0° to 45°.
Align the indicator point with the desired angle.
Once the saw arm has been set at the desired
angle, securely tighten the bevel lock knob.
■
■
Recheck miter angle setting. Make a test cut in
scrap material.
Place the workpiece flat on the miter table with
one edge securely against the fence. If the board
is warped, place the convex side against the
fence. If the concave edge of a board is placed
against the fence, the board could collapse on the
blade at the end of the cut, jamming the blade.
See Figures 41 and 42.
■
When cutting long pieces of lumber or molding,
support the opposite end of the stock with a roller
stand or with a work surface level with the saw
table.
3
0
22.5
1
5
■
■
Align the cutting line on the workpiece with the
edge of saw blade.
0
1
5
22.5
3
0
31.62
4
5
Grasp the stock firmly with one hand and secure it
against the fence. Use the work clamp or a C-
clamp to secure the workpiece when possible.
See Figure 36.
WARNING
To avoid serious personal injury, always keep your
hands outside the no hands zone; at least 3 in.
(8 cm) from blade. Never perform any cutting
operation freehand (without holding workpiece
against the fence). The blade could grab the
workpiece if it slips or twists.
Fig. 36
COMPOUND MITER CUT
C-CLAMP
Page 26
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OPERATION
■
■
Before turning on the saw, perform a dry run of the
cutting operation just to make sure that no problems
will occur when the cut is made.
Grasp the saw handle firmly, depress the lock-off
button, then squeeze the switch trigger. Allow sev-
eralsecondsforthebladetoreachmaximumspeed.
Slowly lower the blade into and through the
workpiece. See Figures 36 and 37.
SUPPORT LONG WORKPIECES
See Figure 38.
Long workpieces need extra supports. Supports
should be placed along the workpiece so it does not
sag. The support should let the workpiece lay flat on
the base of the saw and work table during the cutting
operation. Use the work clamp or a C-clamp to secure
the workpiece.
■
■
Release the switch trigger and allow the saw blade
to stop rotating before raising the blade out of
workpiece.
WARNING:
To avoid serious personal injury, always keep your
hands outside the no hands zone; at least 3 in.
(8 cm) from blade. Never perform any cutting
operation freehand (without holding workpiece
against the fence). The blade could grab the
workpiece if it slips or twists.
0
3
1
5
0
1
5
22.5
0
3
4
5
LONG WORKPIECE
5
4
1
.
6
2
3
3
0
2
2
.
5
15
45° X 45° COMPOUND
MITER CUT
15
.5
22
Fig. 37
0
3
62
31
1.6
4 5
WORKPIECE
SUPPORTS
Fig. 38
Page 27
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OPERATION
CUTTING COMPOUND MITERS
To aid in making the correct settings, the compound angle setting chart below has been provided. Since com-
pound cuts are the most difficult to accurately obtain, trial cuts should be made in scrap material, and much
thought and planning made, prior to making your required cut.
NUMBER OF SIDES
PITCH
OF SIDE
4
5
6
7
8
9
10
M- 30.00°
B- 0.00°
M- 45.00° M- 36.00°
B- 0.00° B- 0.00°
M- 22.50°
B- 0.00°
M- 25.71°
B- 0.00°
M- 20.00° M- 18.00°
B- 0.00° B- 0.00°
0°
5°
M- 22.42°
B- 1.91°
M- 17.94°
B- 1.54°
M- 44.89°
B- 3.53°
M- 35.90° M- 29.91° M- 25.63°
B- 2.94° B- 2.50° B- 2.17°
M- 19.93°
B- 1.71°
M- 19.72°
B- 3.40°
M- 44.56° M- 35.58°
B- 7.05° B- 5.86°
M- 29.62° M- 25.37° M- 22.19°
B- 4.98° B- 4.32° B- 3.81°
M- 17.74°
B- 3.08°
10°
15°
20°
25°
30°
35°
40°
45°
50°
55°
60°
65°
70°
M- 44.01° M- 35.06° M- 29.15°
B- 10.55° B- 8.75° B- 7.44°
M- 21.81° M- 19.37° M- 17.42°
B- 5.68° B- 5.08° B- 4.59°
M- 24.95°
B- 6.45°
M- 28.48°
B- 9.85°
M- 34.32°
B- 11.60°
M- 24.35° M- 21.27° M- 18.88° M- 16.98°
B- 8.53° B- 7.52° B- 6.72° B- 6.07°
M- 43.22°
B- 14.00°
M- 42.19° M- 33.36° M- 27.62° M- 23.56° M- 20.58° M- 18.26°
B- 17.39° B- 14.38° B- 12.20° B- 10.57° B- 9.31° B- 8.31°
M- 16.41°
B- 7.50°
M- 40.89° M- 32.18° M- 26.57° M- 22.64° M- 19.73° M- 17.50°
B- 20.70° B- 17.09° B- 14.48° B- 12.53° B- 11.03° B- 9.85°
M- 15.72°
B- 8.89°
M- 39.32°
B- 23.93°
M- 25.31°
B- 16.67°
M- 16.60°
B- 11.31°
M- 30.76°
B- 19.70°
M- 21.53° M- 18.74°
B- 14.41° B- 12.68°
M- 14.90°
B- 10.21°
M- 37.45° M- 29.10°
B- 27.03° B- 22.20°
M- 20.25° M- 17.60° M- 15.58°
B- 16.19° B- 14.24° B- 12.70°
M- 23.86°
B- 18.75°
M- 13.98°
B- 11.46°
M- 35.26°
B- 30.00°
M- 22.21°
B- 20.70°
M- 14.43°
B- 14.00°
M- 27.19°
B- 24.56°
M- 18.80° M- 16.32°
B- 17.87° B- 15.70°
M- 12.94°
B- 12.62°
M- 32.73°
B- 32.80°
M- 20.36°
B- 22.52°
M- 13.17°
B- 15.19°
M- 25.03°
B- 26.76°
M- 17.20° M- 14.91°
B- 19.41° B- 17.05°
M- 11.80°
B- 13.69°
M- 18.32°
B- 24.18°
M- 11.79°
B- 16.27°
M- 29.84° M- 22.62°
B- 35.40° B- 28.78°
M- 15.44° M- 13.36°
B- 20.82° B- 18.27°
M- 10.56°
B- 14.66°
M- 19.96°
B- 30.60°
M- 13.54° M- 11.70° M- 10.31°
B- 22.07° B- 19.35° B- 17.23°
M- 26.57°
B- 37.76°
M- 16.10°
B- 25.66°
M- 9.23°
B- 15.52°
M- 13.71°
B- 26.95°
M- 7.82°
B -16.26°
M- 22.91° M- 17.07°
B- 39.86° B- 32.19°
M- 11.50° M- 9.93° M- 8.74°
B- 23.16° B- 20.29° B- 18.06°
M- 18.88° M- 13.95° M- 11.17° M- 9.35° M- 8.06° M- 7.10°
B- 41.64° B- 33.53° B- 28.02° B- 24.06° B- 21.08° B- 18.75°
M- 6.34°
B- 16.88°
M- 14.51° M- 10.65°
B- 43.08° B- 34.59°
M- 7.10° M- 6.12° M- 5.38°
B- 24.78° B- 21.69° B- 19.29°
M- 8.50°
B- 28.88°
M- 4.81°
B- 17.37°
75°
80°
85°
90°
M- 5.73°
B- 29.50°
M- 9.85° M- 7.19°
B- 44.14° B- 35.37°
M- 4.78° M- 4.11° M- 3.62° M- 3.23°
B- 25.30° B- 22.14° B- 19.68° B- 17.72°
M- 4.98°
B- 44.78°
M- 3.62°
B- 35.84°
M- 2.40° M- 2.07° M- 1.82°
B- 25.61° B- 22.41° B- 19.92°
M- 2.88°
B- 29.87°
M- 1.62°
B- 17.93°
M- 0.00° M- 0.00° M- 0.00° M- 0.00° M- 0.00° M- 0.00°
B- 36.00° B- 30.00° B- 25.71° B- 22.50° B- 20.00° B- 18.00°
M- 0.00°
B- 45.00°
Each B (Bevel) and M (Miter) Setting is Given to the Closet 0.005°.
COMPOUND-ANGLE SETTINGS FOR POPULAR STRUCTURES
Page 28
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OPERATION
CUTTING CROWN MOLDING
LAYING MOLDING FLAT ON THE
MITER TABLE
See Figure 39.
Your compound miter saw does an excellent job of
cutting crown molding. In general, compound miter
saws do a better job of cutting crown molding than
any other tool made.
To use this method for accurately cutting crown
molding for a 90° inside or outside corner, lay the
molding with its broad back surface flat on the miter
table and against the fence.
In order to fit properly, crown molding must be com-
pound mitered with extreme accuracy.
When setting the bevel and miter angles for com-
pound miters, remember that the settings are interde-
pendent; changing one angle changes the other angle
as well.
The two contact surfaces on a piece of crown molding
that fit flat against the ceiling and the wall of a room
are at angles that, when added together, equal
exactly 90°. Most crown molding has a top rear angle
(the section that fits flat against the ceiling) of 52° and
a bottom rear angle (the section that fits flat against
the wall) of 38°.
Keep in mind that the angles for crown moldings are
very precise and difficult to set. Since it is very easy
for these angles to shift, all settings should first be
tested on scrap molding. Also, most walls do not have
angles of exactly 90°, therefore, you will need to fine
tune your settings.
52°
CEILING
38°
W
A
L
L
INSIDE
CORNER
OUTSIDE
CORNER
FENCE
FENCE
BOTTOM EDGE AGAINST FENCE =
RIGHT SIDE, INSIDE CORNER
LEFT SIDE, OUTSIDE CORNER
TOP EDGE AGAINST FENCE =
LEFT SIDE, INSIDE CORNER
RIGHT SIDE, OUTSIDE CORNER
MITER TABLE
MITER TABLE
CROWN MOLDING FLAT ON MITER TABLE
Fig. 39
Page 29
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OPERATION
When cutting crown molding by this method the bevel
angle should be set at 33.85°. The miter angle should
be set at 31.62° either right or left, depending on the
desired cut for the application. See the chart below for
correct angle settings and correct positioning of crown
molding on miter table.
The settings in the chart below can be used for cutting
All Standard (U.S.) crown molding with 52° and 38°
angles. The crown molding is placed flat on the miter
table using the compound features of your miter saw.
4
5
5
5
4
3
1
.6
.6
1
3
30
0
3
22.5
.5
2
2
15
5
1
0
Bevel
Angle
RIGHT
Fig. 40
Type of Cut
Setting
If the warped material is positioned the wrong way as
shown in figure 41, it will pinch the blade near the
completion of the cut.
Left side, inside corner
1. Top edge of molding against fence
2. Miter table set right 31.62°
3. Save left end of cut
33.85°
33.85°
33.85°
33.85°
Right side, inside corner
1. Bottom edge of molding against fence
2. Miter table set left 31.62°
3. Save left end of cut
Left side, outside corner
1. Bottom edge of molding against fence
2. Miter table set left 31.62°
3. Save right end of cut
4
5
5
5
4
Right side, outside corner
1. Top edge of molding against fence
2. Miter table set right 31.62°
3. Save right end of cut
3
1
.6
.6
1
3
3
0
30
2
2
.5
.5
22
1
5
15
0
WRONG
Fig. 41
CUTTING WARPED MATERIAL
See Figures 40 and 41.
When cutting warped material, always make sure it is
positioned on the miter table with the convex side
against the fence as shown in figure 40.
WARNING:
To avoid a kickback and to avoid serious personal
injury, never position the concave edge of bowed
or warped material against the fence.
Page 30
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MAINTENANCE
Do not abuse power tools. Abusive practices can
damage tool as well as workpiece.
WARNING:
When servicing, use only identical Ryobi
replacement parts. Use of any other part may
create a hazard, cause product damage or create
a risk of serious personal injury.
WARNING:
Do not attempt to modify this tool or create
accessories not recommended for use with this
tool. Any such alteration or modification is misuse
and could result in a hazardous condition leading
to possible serious personal injury.
Avoid using solvents when cleaning plastic parts.
Most plastics are susceptible to damage from various
types of commercial solvents and may be damaged
by their use. Use clean cloths to remove dirt, dust, oil,
grease, etc.
IMPORTANT
Servicing requires extreme care and knowledge of the
system and should be performed only by a qualified
service technician. For service we suggest you return
the tool to your nearest RYOBI AUTHORIZED
SERVICE CENTER for repair. Always use original
factory replacement parts when servicing.
WARNING:
Do not at any time let brake fluids, gasoline,
petroleum-based products, penetrating oils, etc.
come in contact with plastic parts. They contain
chemicals that can damage, weaken or destroy
plastic and create a risk of serious personal injury.
To preserve natural resources, please
recycle or dispose of batteries
properly.
BATTERIES
The battery pack for this saw is equipped with 15
nickel-cadmium rechargeable battery cells. Length of
service from each charging will depend on the type of
work you are doing.
This product contains nickel-
cadmium batteries. Local, state or
federal laws may prohibit disposal of
nickel-cadmium batteries in ordinary
trash.
The battery cells have been designed to provide
maximum trouble free life. However, like all batteries,
they will eventually wear out. Do not disassemble
battery pack and attempt to replace the battery cells.
Handling of these batteries, especially when wearing
rings and jewelry, could result in a serious burn and
possible explosion.
Consult your local waste authority for information
regarding available recycling and/or disposal options.
BATTERY PACK REMOVAL AND
PREPARATION FOR RECYCLING
To obtain the longest possible battery life, we suggest
the following:
WARNING:
■
■
■
Store and charge your battery pack in a cool area.
Temperatures above or below normal room
temperature will shorten battery life.
Upon removal, cover the battery pack's terminals
with heavy duty adhesive tape. Do not attempt to
destroy or disassemble battery pack or remove any
of its components. Nickel-cadmium batteries must
be recycled or disposed of properly. Also, never
touch both terminals with metal objects and/or
body parts as short circuit may result. Keep away
from children. Failure to comply with these
Never store battery pack in a discharged
condition. Recharge them immediately after they
are discharged.
All batteries gradually lose their charge. The
higher the temperature the quicker they lose their
charge. If you store your tool for long periods of
time without using it, recharge the batteries every
month or two. This practice will prolong battery
life.
warnings could result in fire and/or serious injury.
Page 31
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OPERATOR'S MANUAL
8-1/4 in. (209.6 mm) Cordless
Compound Miter Saw
Model MS181
• SERVICE
Now that you have purchased your tool, should a need ever exist for repair parts or
service, simply contact your nearest Ryobi Authorized Service Center. Be sure to
provide all pertinent facts when you call or visit. Please call 1-800-525-2579 for your
nearest Ryobi Authorized Service Center. You can also check our web site at
• MODEL NO. AND SERIAL NO.
The model number of this tool will be found on a plate attached to the motor housing.
Please record the serial number in the space provided below.
• HOW TO ORDER REPAIR PARTS
WHEN ORDERING REPAIR PARTS,
ALWAYS GIVE THE FOLLOWING INFORMATION:
MS181
• MODEL NUMBER
• SERIAL NUMBER
RYOBI TECHNOLOGIES, INC.
1428 Pearman Dairy Road Anderson, SC 29622
Post Office Box 1207 Anderson, SC 29622-1207
Phone 1-800-525-2579
983000-075
6-03
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