OPERATOR'S MANUAL
7-1/4 in. LASER CIRCULAR SAW
DOUBLE INSULATED
CSB140LZ
Your Laser Circular Saw has been engineered and manufactured to Ryobi’s high standard for dependability, ease of opera-
tion, and operator safety. When properly cared for, it will give you years of rugged, trouble-free performance.
WARNING: To reduce the risk of injury, the user must read and understand the operator's manual before using
this product.
Thank you for buying a Ryobi product.
SAVE THIS MANUAL FOR FUTURE REFERENCE
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GENERAL SAFETY RULES
n Avoid accidental starting. Be sure switch is off
WARNING:
before plugging in. Carrying tools with your finger on the
switch or plugging in tools that have the switch on invites
accidents.
Read and understand all instructions. Failure to follow
all instructions listed below, may result in electric shock,
fire and/or serious personal injury.
n Remove adjusting keys or wrenches before turning
the tool on. A wrench or a key that is left attached to a
rotating part of the tool may result in personal injury.
n Do not overreach. Keep proper footing and balance
at all times. Proper footing and balance enables better
control of the tool in unexpected situations.
n Use safety equipment. Always wear eye protection.
Dust mask, nonskid safety shoes, hard hat, or hearing
protection must be used for appropriate conditions.
n Do not wear loose clothing or jewelry. Contain long
hair. Loose clothes, jewelry, or long hair can be drawn
into air vents.
SAVE THESE INSTRUCTIONS
WORK AREA
Keep your work area clean and well lit. Cluttered
benches and dark areas invite accidents.
n Do not operate power tools in explosive atmospheres,
such as in the presence of flammable liquids, gases,
or dust. Power tools create sparks which may ignite the
dust or fumes.
n Keep bystanders, children, and visitors away while
operating a power tool. Distractions can cause you to
lose control.
n Do not use on a ladder or unstable support. Stable
footing on a solid surface enables better control of the
tool in unexpected situations.
ELECTRICAL SAFETY
n Double insulated tools are equipped with a polarized
plug (one blade is wider than the other). This 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
a polarized outlet. Do not change the plug in any way.
TOOL USE AND CARE
n Use clamps or other practical way to secure and
support the workpiece to a stable platform. Holding
the work by hand or against your body is unstable and
may lead to loss of control.
n Do not force tool. Use the correct tool for your
application. The correct tool will do the job better and
safer at the rate for which it is designed.
n Do not use tool if switch does not turn it on or off.
Any tool that cannot be controlled with the switch is
dangerous and must be repaired.
n Disconnect the plug from the power source before
making any adjustments, changing accessories, or
storing the tool. Such preventive safety measures reduce
the risk of starting the tool accidentally.
n Store idle tools out of reach of children and other
untrained persons. Tools are dangerous in the hands
of untrained users.
n Maintain tools with care. Keep cutting tools sharp
and clean. Properly maintained tools, with sharp cutting
edges are less likely to bind and are easier to control.
n Check for misalignment or binding of moving parts,
breakage of parts, and any other condition that may
affect the tools operation. If damaged, have the tool
serviced before using. Many accidents are caused by
poorly maintained tools.
n Use only accessories that are recommended by the
manufacturer for your model. Accessories that may be
suitable for one tool, may become hazardous when used
on another tool.
Double insulation
eliminates the need for the three-
wire grounded power cord and grounded power supply
system.
n Avoid body contact with grounded surfaces such as
pipes, radiators, ranges, and refrigerators. There is an
increased risk of electric shock if your body is ground-
ed.
n Don’t expose power tools to rain or wet conditions.
Water entering a power tool will increase the risk of
electric shock.
n Do not abuse the cord. Never use the cord to carry the
tools or pull the plug from an outlet. Keep cord away
from heat, oil, sharp edges, or moving parts. Replace
damaged cords immediately. Damaged cords increase
the risk of electric shock.
n When operating a power tool outside, use an outdoor
extension cord marked “W-A” or “W”. These cords
are rated for outdoor use and reduce the risk of electric
shock.
PERSONAL SAFETY
n Stay alert, watch what you are doing and use common
sense when operating a power tool. Do not use tool
while tired or under the influence of drugs, alcohol,
or medication. A moment of inattention while operating
power tools may result in serious personal injury.
n Keep the tool and its handle dry, clean and free from
oil and grease. Always use a clean cloth when clean-
ing. Never use brake fluids, gasoline, petroleum-based
products, or any strong solvents to clean your tool.
Following this rule will reduce the risk of loss of control
and deterioration of the enclosure plastic.
n Dress properly. Do not wear loose clothing or jewelry.
Contain long hair. Keep your hair, clothing, and gloves
away from moving parts. Loose clothes, jewelry, or long
hair can be caught in moving parts.
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GENERAL SAFETY RULES
n When servicing a tool, use only identical replace-
SERVICE
ment parts. Follow instructions in the Maintenance
section of this manual. Use of unauthorized parts or
failure to follow Maintenance Instructions may create a
risk of electric shock or injury.
n Tool service must be performed only by qualified
repair personnel. Service or maintenance performed by
unqualified personnel could result in a risk of injury.
SPECIFIC SAFETY RULES
n Always use blades with correct size and shape
(diamond vs. round) arbor holes. Blades that do
not match the mounting hardware of the saw will run
eccentrically, causing loss of control.
n DANGER! Keep hands away from cutting area and
blade. Keep your second hand on the auxiliary handle
or motor housing. If both hands are holding the saw,
they cannot be cut by the blade.
n Keep your body positioned to either side of the saw
blade, but not in line with the saw blade. KICKBACK
could cause the saw to jump backwards. (See “Causes
And Operator Prevention Of Kickback” later.)
n Never use damaged or incorrect blade washers
or bolts. The blade washers and bolts were specially
designedforthesawforoptimumperformanceandsafety
of operation.
n Do not reach underneath the work. The guard cannot
protect you from the blade below the work.
Causes and Operator Prevention of Kickback:
Kickback is a sudden reaction to a pinched, bound, or
misaligned saw blade, causing an uncontrolled saw to lift up
and out of the workpiece toward the operator.
When the blade is pinched or bound tightly by the kerf closing
down, the blade stalls and the motor reaction drives the unit
rapidly back toward the operator.
Ifthebladebecomestwistedormisalignedinthecut,theteeth
at the back edge of the blade can dig into the top surface of
the wood causing the blade to climb out of the kerf and jump
back toward the operator.
Kickbackistheresultoftoolmisuseand/orincorrectoperating
proceduresorconditionsandcanbeavoidedbytakingproper
precautions, as given below:
n Checklowerguardforproperclosingbeforeeachuse.
Donotoperatesawiflowerguarddoesnotmovefreely
andcloseinstantly.Neverclamportiethelowerguard
into the open position. If saw is accidentally dropped,
lower guard may be bent. Raise the lower guard with the
retracting handle. Make sure it moves freely and does
not touch the blade or any other part, in all angles and
depths of cut.
n Check the operation and condition of the lower guard
spring. If the guard and the spring are not operating
properly,theymustbeservicedbeforeuse.Lowerguard
may operate sluggishly due to damaged parts, gummy
deposits, or a buildup of debris.
n Maintain a firm grip with both hands on the saw and
position your body and arm to allow you to resist
KICKBACK forces. KICKBACK forces can be controlled
by the operator, if proper precautions are taken.
n When blade is binding, or when interrupting a cut
for any reason, release the trigger and hold the saw
motionless in the material until the blade comes to a
completestop.Neverattempttoremovethesawfrom
the work or pull the saw backward while the blade is
in motion, or KICKBACK may occur. Investigate and
take corrective actions to eliminate the cause of blade
binding.
n Lower guard should be retracted manually only for
special cuts, such as "Pocket Cuts" and "Compound
Cuts."Raiselowerguardbyretractinghandle.Assoon
as blade enters the material, lower guard must be
released. For all other sawing, the lower guard should
operate automatically.
n Always observe that the lower guard is covering the
blade before placing saw down on bench or floor. An
unprotected, coasting blade will cause the saw to walk
backwards, cutting whatever is in its path. Be aware of
the time it takes for the blade to stop after switch is
released.
n When restarting a saw in the workpiece, center the
saw blade in the kerf and check that saw teeth are
not engaged into the material. If saw blade is binding,
it may walk up or KICKBACK from the workpiece as the
saw is restarted.
n Support large panels to minimize the risk of blade
pinching and KICKBACK. Large panels tend to sag
under their own weight. Supports must be placed under
the panel on both sides, near the line of cut and near the
edge of the panel.
n NEVER hold piece being cut in your hands or across
your leg. It is important to support the work properly
to minimize body exposure, blade binding, or loss of
control.
n Hold tool by insulated gripping surfaces when
performing an operation where the cutting tool may
contact hidden wiring or its own cord. Contact with a
“live” wire will make exposed metal parts of the tool “live”
and shock the operator.
n When ripping, always use a rip fence or straight edge
guide. Thisimprovestheaccuracyofthecutandreduces
the chance for blade binding.
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SPECIFIC SAFETY RULES
n Do not use dull or damaged blade. Unsharpened or
by an authorized service center. Following this rule will
improperly set blades produce narrow kerf which causes
reduce the risk of shock, fire, or serious injury.
excessive friction, blade binding and KICKBACK.
n 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. A wire gage size (A.W.G.) of at least 12 is
recommended for an extension cord 50 feet or
less in length. A cord exceeding 100 feet is not
recommended. If in doubt, use the next heavier gage.
The smaller the gage number, the heavier the cord. An
undersized cord will cause a drop in line voltage resulting
in loss of power and overheating.
n Blade depth and bevel adjusting locking levers
must be tight and secure before making cut. If blade
adjustment shifts while cutting, it may cause binding and
KICKBACK.
n Use extra caution when making a “Pocket Cut” into
existingwallsorotherblindareas.Theprotrudingblade
may cut objects that can cause KICKBACK.
n Know your power tool. Read operator’s manual care-
fully. Learn its applications and limitations, as well
as the specific potential hazards related to this tool.
Following this rule will reduce the risk of electric shock,
fire, or serious injury.
n Inspect for and remove all nails from lumber before
using this tool. Following this rule will reduce the risk of
serious personal injury.
n Always wear safety glasses. Everyday eyeglasses
have only impact-resistant lenses; they are NOT safety
glasses. Following this rule will reduce the risk of serious
personal injury.
Laser Guide Warnings:
The laser guide radiation used in the Ryobi circular saw is
Class IIIa with maximum 5mW and 650nm wavelengths.
These lasers do not normally present an optical hazard
although staring at the beam may cause flash blindness.
n Protect your lungs. Wear a face or dust mask if the
operation is dusty. Following this rule will reduce the
risk of serious personal injury.
n Avoid direct eye exposure when using the laser guide.
n The laser shall be used and maintained in accordance
with the manufacturer’s instructions.
n Protect your hearing. Wear hearing protection during
extended periods of operation. Following this rule will
reduce the risk of serious personal injury.
n Never aim the beam at a person or object other than the
workpiece.
n Inspect tool cords periodically and, if damaged, have
repaired at your nearest authorized service center.
Constantly stay aware of cord location. Following this
rule will reduce the risk of electric shock or fire.
n Always ensure the laser beam is aimed at a sturdy
workpiece without reflective surfaces. Shiny reflective
sheet metal or similar shiny materials are not suitable for
laser use.
n 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 should be properly repaired or replaced
n All repairs should be made by an authorized service
representative or the laser manufacturer.
n 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.
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 examples of these chemicals are:
• lead from lead-based paints,
• crystalline silica from bricks and cement and other masonry products, and
• arsenic and chromium from chemically-treated lumber.
Your risk from these exposures varies, depending on how often you do this type of work. To reduce your exposure to
these chemicals: work in a well ventilated area, and work with approved safety equipment, such as those dust masks
that are specially designed to filter out microscopic particles.
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SYMBOLS
Some of the following symbols may be used on this tool. Please study them and learn their meaning. Proper interpreta-
tion of these symbols will allow you to operate the tool better and safer.
SYMBOL
NAME
DESIGNATION/EXPLANATION
V
Volts
Voltage
Current
A
Hz
W
Amperes
Hertz
Watt
Frequency (cycles per second)
Power
min
Minutes
Time
Alternating Current
Type of current
Direct Current
Type or a characteristic of current
Rotational speed, at no load
n
No Load Speed
o
Class II Construction
Per Minute
Double-insulated construction
.../min
Revolutions, strokes, surface speed, orbits etc., per minute
Wet Conditions Alert
Do not expose to rain or use in damp locations.
To reduce the risk of injury, user must read and understand
operator’s manual before using this product.
Read The Operator’s Manual
Always wear safety goggles or safety glasses with side shields
and a full face shield when operating this product.
Eye Protection
Safety Alert
Precautions that involve your safety.
Failure to keep your hands away from the blade will result in
serious personal injury.
No Hands Symbol
Failure to keep your hands away from the blade will result in
serious personal injury.
No Hands Symbol
No Hands Symbol
No Hands Symbol
Hot Surface
Failure to keep your hands away from the blade will result in
serious personal injury.
Failure to keep your hands away from the blade will result in
serious personal injury.
To reduce the risk of injury or damage, avoid contact with
any hot surface.
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SYMBOLS
The following signal words and meanings are intended to explain the levels of risk associated with this
product.
SYMBOL
SIGNAL
MEANING
DANGER:
Indicates an imminently hazardous situation, which, if not avoided, will
result in death or serious injury.
WARNING:
CAUTION:
CAUTION:
Indicates a potentially hazardous situation, which, if not avoided, could
result in Death or serious injury.
Indicates a potentially hazardous situation, which, if not avoided, may
result in minor or moderate injury.
(Without Safety Alert Symbol) Indicates a situation that may result in
property damage.
SERVICE
WARNING:
Servicing requires extreme care and knowledge and should
be performed only by a qualified service technician. For
service we suggest you return the product to your nearest
AUTHORIZED SERVICE CENTER for repair. When servic-
ing, use only identical replacement parts.
To avoid serious personal injury, do not attempt to use this
product until you read thoroughly and understand com-
pletely the operator’s manual. Save this operator’s manual
and review frequently for continuing safe operation and
instructing others who may use this product.
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.
SAVE THESE INSTRUCTIONS
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ELECTRICAL
DOUBLE INSULATION
EXTENSION CORDS
Double insulation is a concept in safety in electric power
tools, which eliminates the need for the usual three-
wire grounded power cord. All exposed metal parts are
isolated from the internal metal motor components with
protecting insulation. Double insulated tools do not need
to be grounded.
When using a power tool at a considerable distance from
a power source, be sure to use an extension cord that has
the capacity to handle the current the tool will draw. An un-
dersized cord will cause a drop in line voltage, resulting in
overheating and loss of power. Use the chart to determine
the minimum wire size required in an extension cord. Only
round jacketed cords listed by Underwriter’s Laboratories
(UL) should be used.
WARNING:
When working outdoors with a tool, use an extension cord
that is designed for outside use. This type of cord is desig-
nated with “WA” on the cord’s jacket.
The double insulated system is intended to protect the
user from shock resulting from a break in the tool’s in-
ternal insulation. Observe all normal safety precautions
to avoid electrical shock.
Before using any extension cord, inspect it for loose or ex-
posed wires and cut or worn insulation.
**Ampere rating (on tool faceplate)
0-2.0
2.1-3.4
3.5-5.0
5.1-7.0
7.1-12.0 12.1-16.0
NOTE: Servicing of a tool with double insulation 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 authorized
service center for repair. Always use original factory replace-
ment parts when servicing.
Cord Length
Wire Size (A.W.G.)
25'
50'
16
16
16
16
16
16
16
16
14
16
14
12
14
14
10
14
12
—
100'
ELECTRICAL CONNECTION
**Used on 12 gauge - 20 amp circuit.
This tool has a precision-built electric motor. It should be
connected to a power supply that is 120 volts, 60 Hz, AC
only (normal household current). Do not operate this tool
on direct current (DC). A substantial voltage drop will cause
a loss of power and the motor will overheat. If your tool does
not operate when plugged into an outlet, double-check the
power supply.
NOTE: AWG = American Wire Gauge
WARNING:
Keep the extension cord clear of the working area. Po-
sition the cord so that it will not get caught on lumber,
tools or other obstructions while you are working with a
power tool. Failure to do so can result in serious personal
injury.
WARNING:
Check extension cords before each use. If damaged re-
place immediately. Never use tool with a damaged cord
since touching the damaged area could cause electrical
shock resulting in serious injury.
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FEATURES
PRODUCT SPECIFICATIONS
nInput............................ 120 V, 60 Hz, AC Only, 14 Amps
nNo Load Speed..............................................5500 /min.
nNet Weight.............................................. 12 lbs. (5.4 kg)
nLaser Guide ......................Class IIIa, 5mW max, 650nm
nBlade Diameter................................. 7-1/4 in. (184 mm)
nBlade Arbor.............................................5/8 in. (16 mm)
nCutting Depth at 0°............................. 2-3/8 in. (60 mm)
nCutting Depth at 45°....................... 1-13/16 in. (46 mm)
nCutting Depth at 51.5°........................ 1-5/8 in. (41 mm)
SPINDLE LOCK
BUTTON
SWITCH
LASER GUIDE
UPPER BLADE
GUARD
DEPTH
ADJUSTMENT
KNOB
BLADE
LOWER
BLADE
GUARD
BASE
DUST CHUTE
LASER GUIDE
HANDLE
LASER GUIDE
SWITCH
MOTOR
HOUSING
LOWER BLADE
GUARD HANDLE
EDGE GUIDE
KNOB
EDGE GUIDE
BEVEL
ADJUSTMENT
KNOB
Fig. 1
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FEATURES
SPINDLE LOCK
The spindle lock allows you to secure the blade when turn-
ing the blade screw.
KNOW YOUR LASER CIRCULAR SAW
See Figure 1.
Before attempting to use this product, familiarize yourself
with all operating Features and Safety Rules
NOTE: Do not run circular saw with spindle lock engaged.
EDGE GUIDE
Edge guide is used when making long or wide rip cuts with
the saw.
DUST CHUTE
To direct saw dust and chips away from the operator, a dust
chute is located on the side of the upper blade guard.
SWITCH
ERGONOMIC DESIGN
The circular saw is equipped with a pre-travel safety switch
which reduces the possibility of accidental starting. When
you depress the switch, the saw will not start until you reach
the pre-travel position. You must depress the switch fully to
activate the saw.
The design of your circular saw provides for maintaining
proper two hand control when cutting. It has been designed
to be comfortable and easy to grasp.
LASER GUIDE
The laser guide will generate a red colored line on the work
surface when turned on.
ASSEMBLY
UNPACKING
This product requires assembly.
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.
n Carefully remove the tool and any accessories from the
box. Make sure that all items listed in the packing list are
included.
n Inspect the tool carefully to make sure no breakage or
WARNING:
damage occurred during shipping.
Do not attempt to modify this tool or create accesso-
ries 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.
n Do not discard the packing material until you have care-
fully inspected and satisfactorily operated the tool.
n If any parts are damaged or missing, please call
1-800-525-2579 for assistance.
PACKING LIST
Circular Saw with laser
7-1/4 in. (184 mm) Blade
Edge guide
WARNING:
Do not connect to power supply until assembly is com-
plete. Failure to comply could result in accidental starting
and possible serious personal injury.
Dust Nozzle Kit
Wrench
WARNING:
Case
7-1/4 in. (184 mm) blade is the maximum blade capacity
of the saw. Also, never use a blade that is too thick to
allow outer blade washer to engage with the flat on the
spindle. Larger blades will come in contact with the blade
guards, while thicker blades will prevent blade screw from
securing blade on spindle. Either of these situations could
result in a serious accident.
Warranty Registration Card
Operator's Manual
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ASSEMBLY
n Depress spindle lock button.
ATTACHING BLADE
See Figures 2 - 3.
n Remove blade screw by turning it counterclockwise with
the wrench.
Follow these directions to attach the blade.
n Unplug the saw.
n Remove spring washer and outer blade washer ("D"
washer).
CAUTION:
n Lift lower blade guard.
To prevent damage to the spindle or spindle lock, always
allow motor to come to a complete stop before engaging
spindle lock.
n Remove blade.
SPINDLE
OUTER
n Depress spindle lock button.
n Remove blade screw by turning it counterclockwise with
the wrench, while keeping the lock button depressed.
n Remove spring washer and outer flange washer
WASHER
(“D”
BLADE
WASHER)
(“D” washer).
n Wipe a drop of oil onto the inner flange bushing and outer
flange washer ("D" washer) where they contact blade.
BLADE
SCREW
WARNING:
INNER
FLANGE
BUSHING
If inner flange bushing has been removed, replace it
before placing blade on spindle. Failure to do so could
cause an accident since blade will not tighten properly.
SPRING
WASHER
Fig. 2
nRetract the lower guard into the upper guard, making
sure the lower guard spring works properly, allowing the
guard to move freely.
OUTER WASHER
(“D” WASHER)
nCheck to see that the saw teeth and arrow on the saw
blade and the arrow on the lower guard are pointing in
the same direction.
NOTE: The saw teeth point upward at the front of the
saw as shown.
n Fit the saw blade inside the lower blade guard and onto
the spindle.
n Replace "D" washer.
CUPPED SIDE OF OUTSIDE OF SPRING
SPRING WASHER
WASHER
n Replace spring washer.
Fig. 3
n Depress spindle lock and replace blade screw.
n Tighten blade screw securely by turning it clockwise with
SPINDLE
the wrench.
LOCK
NOTE: Never use a blade that is too thick to allow the
"D" washer to engage with the flat on the spindle.
BUTTON
REMOVING BLADE
See Figure 4.
Follow these directions to remove the blade.
n Unplug the saw.
CAUTION:
To prevent damage to the spindle or spindle lock, always
allow motor to come to a complete stop before engaging
spindle lock.
BLADE
SCREW
WRENCH
Fig. 4
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ASSEMBLY
WARNING::
Current attachments and accessories available for use
with this tool are listed above. Do not use any attach-
ments or accessories not recommended by the manufac-
turer of this tool. The use of attachments or accessories
not recommended can result in serious personal injury.
EDGE GUIDE
Use the edge guide provided when making long or wide rip
cuts with the saw.
EDGE GUIDE
KNOB
TO ASSEMBLE EDGE GUIDE
See Figure 5.
Follow these directions to assemble the edge guide.
n Unplug the saw.
EDGE GUIDE
n Place edge guide through holes in base as shown in the
figure.
n Adjust edge guide to the width needed.
n Tighten edge guide knob securely.
Fig. 5
DUST NOZZLE KIT
See Figure 6.
Dust nozzle kit is provided with the saw. As shown in the
figure,theadapterfitsoverthedustchutewhichislocatedon
the upper blade guard.The nozzle attaches to the adapter.
NOTE: If you use the nozzle, you should always connect it
to a standard vacuum hose.
TO ATTACH DUST NOZZLE
Follow these directions to attach the dust nozzle.
n Unplug the saw.
ADAPTER
HOLE
n Lift lower blade guard.
n Orient adapter to fit into the dust chute opening on upper
blade guard.
n Secure adapter with screw provided.
DUST
CHUTE
n Align hole in nozzle with raised lip on adapter and snap
into place when using a vacuum hose.
SCREW
RAISED
LIP
NOZZLE
Fig. 6
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OPERATION
WARNING:
Do not allow familiarity with tools to make you careless.
Remember that a careless fraction of a second is suf-
ficient to inflict serious injury.
WARNING:
Always wear safety goggles or safety glasses with side
shields when operating power tools. Failure to do so
could result in objects being thrown into your eyes re-
sulting in possible serious injury.
KICKBACK - BLADE SET TOO DEEP
Fig. 7
INCORRECT
SUPPORT
WARNING:
Do not use any attachments or accessories not recom-
mended by the manufacturer of this tool. The use of at-
tachments or accessories not recommended can result
in serious personal injury.
APPLICATIONS
You may use this tool for the purposes listed below:
nCross Cutting/Rip Cutting
nBevel Cutting
nPocket Cutting
KICKBACK
See Figures 7 - 10.
Fig. 8
Kickback occurs when the blade stalls rapidly and the saw
is driven back towards you. Blade stalling is caused by any
action which pinches the blade in the wood.
DANGER:
Release switch immediately if blade binds or saw stalls.
Kickback could cause you to lose control of the saw. Loss
of control can lead to serious injury.
To guard against kickback, avoid dangerous practices such
as the following.
n Setting blade depth incorrectly.
CORRECT BLADE DEPTH SETTING = BLADE EXPOSED 1/4 in.
(6.35 mm) OR LESS ON UNDERSIDE OF WORKPIECE
n Sawing into knots or nails in workpiece.
n Twisting the blade while making a cut.
Fig. 9
n Making a cut with a dull, gummed up, or improperly set
CORRECT
SUPPORT
blade.
n Supporting the workpiece incorrectly.
n Forcing a cut.
n Cutting warped or wet lumber.
n Operating the tool incorrectly or misusing the tool.
To lessen the chance of kickback, follow these safety
practices.
n Keep the blade at the correct depth setting. The depth
setting should not exceed 1/4 in. (6.35 mm) below the
material being cut.
Fig. 10
n Inspect the workpiece for knots or nails before cutting.
Never saw into a knot or nail.
13
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OPERATION
n Make straight cuts. Always use a straight edge guide
when rip cutting. This helps prevent twisting the blade.
n Use clean, sharp, and properly set blades. Never make
cuts with dull blades.
n Support the workpiece properly before beginning a cut.
n Use steady, even pressure when making a cut. Never
force a cut.
n Do not cut warped or wet lumber.
n Hold the saw firmly with both hands and keep your body
in a balanced position so as to resist the forces if kickback
should occur.
WARNING:
LOWER BLADE GUARD
IS IN UP POSITION
WHEN MAKING A CUT
When using the saw, always stay alert and exercise con-
trol. Do not remove the saw from the workpiece while the
blade is moving.
Fig. 11
SAW BLADES
STARTING/STOPPING THE SAW
The best of saw blades will not cut efficiently if they are not
kept clean, sharp, and properly set. Using a dull blade will
place a heavy load on the saw and increase the danger of
kickback. Keep extra blades on hand, so that sharp blades
are always available.
See Figure 12.
To start the saw: Depress the switch trigger.
Always let the blade reach full speed, then guide the saw
into the workpiece.
Gum and wood pitch hardened on blades will slow the saw
down. Remove saw blade from the saw and use gum and
pitch remover, hot water, or kerosene to remove these ac-
cumulations. DO NOT USE GASOLINE.
WARNING:
The blade coming in contact with the workpiece before
it reaches full speed could cause the saw to “kickback”
towards you resulting in serious injury.
BLADE GUARD SYSTEM
See Figure 11.
The lower blade guard attached to your circular saw is there
for your protection and safety. Do not alter it for any reason.
If it becomes damaged, do not operate the saw until you
have the guard repaired or replaced. Always leave guard in
operating position when using the saw.
To stop the saw: Release the switch trigger.
After you release the switch trigger, allow the blade to
come to a complete stop. Do not remove the saw from
the workpiece while the blade is moving.
DANGER:
When sawing through work, lower blade guard does not
cover blade on the underside of work. Since blade is
exposed on underside of work, keep hands and fingers
away from cutting area. Any part of your body coming in
contact with moving blade will result in serious injury.
SWITCH
CAUTION:
Never use saw when guard is not operating correctly.
Check the guard for correct operation before each use.
The guard is operating correctly when it moves freely and
readily returns to the closed position. If you drop the saw,
check the lower blade guard and bumper for damage at
all depth settings before reuse.
Fig. 12
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OPERATION
n Locate depth of cut scale on back of upper blade
USING THE LASER GUIDE
See Figure 13.
guard.
n Hold base flat against the workpiece and raise or lower
saw until the indicator mark on bracket aligns with notch
on blade guard.
WARNING:
Do not stare into the laser beam or turn the laser on
when the tool is not in use. Failure to do so could result
in possible serious personal injury.The laser unit comes
from the factory already installed and aligned. If the laser
becomes misaligned after time refer to the "adjustments"
section.
n Tighten depth adjustment knob securely.
LASER GUIDE
SWITCH
ON(I)/OFF(O)
nMark the line to be cut on the workpiece.
nAdjust the depth and angle of the cut as needed.
nSwitch on ( I ) the laser beam.
nPlug the tool into a power supply and start the motor.
NOTE: Do not touch the blade to the workpiece until the
saw has reached maximum speed.
nSlowly push the saw forward into the workpiece.
NOTE: Keep the laser beam on the marked line on the
workpiece for precision cutting.
nOnce the cut is complete, allow the saw to come to a
complete stop before turning off the laser.
nUnplug the saw.
ADJUSTING BLADE DEPTH
See Figure 14.
Always keep correct blade depth setting. The correct blade
depth setting for all cuts should not exceed 1/4 in. (6.35 mm)
below the material being cut. More blade depth will increase
the chance of kickback and cause the cut to be rough. For
more depth of cut accuracy, a scale is located on the upper
blade guard.
Follow these directions to adjust the blade depth.
Fig. 13
n Unplug the saw.
DEPTH OF CUT
SCALE
WARNING:
Failure to unplug the tool could result in accidental start-
ing causing serious injury.
n Loosen depth adjustment knob.
n Determine the desired depth of cut.
BASE
DEPTH
ADJUSTMENT
KNOB
Fig. 14
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OPERATION
OPERATING THE SAW
See Figures 15 - 17.
It is important to understand the correct method for operat-
ing the saw. Refer to the figures in this section to learn the
correct and incorrect ways for handling the saw.
WARNING:
To make sawing easier and safer, always maintain proper
control of the saw. Loss of control could cause an ac-
cident resulting in possible serious injury.
DANGER:
When lifting the saw from the workpiece, the blade is
exposed on the underside of the saw until the lower blade
guard closes. Make sure the lower blade guard is closed
before setting the saw down.
Fig. 15
To make the best possible cut, follow these helpful hints.
n Hold the saw firmly with both hands.
n Avoid placing your hand on the workpiece while making
a cut.
n Support the workpiece so that the cut is always on your
right.
n Support the workpiece near the cut.
n Clamp the workpiece securely so that the workpiece will
not move during the cut.
n Avoid placing the saw on the part of the workpiece that
will fall off when the cut is made.
n Place the workpiece with the “good” side down.
n Draw a guideline along the desired line of cut before
beginning your cut.
n Keep the cord away from the cutting area. Always place
the cord to prevent it from hanging up on the workpiece
while making a cut.
Fig. 16
DANGER:
If the cord hangs up on the workpiece during a cut, re-
lease the switch trigger immediately. Unplug the saw and
reposition the cord to prevent it from hanging up again.
DANGER:
Using a saw with a damaged cord could result in serious
injury or death. If the cord has been damaged, have it
replaced before using the saw again.
Fig. 17
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OPERATION
CROSS CUTTING/RIP CUTTING
See Figure 18.
TOP VIEW OF SAW
When making a cross cut or rip cut, align the line of cut
with the outer blade guide notch on the base as shown in
the figure.
Since blade thicknesses vary, always make a trial cut in scrap
material along a guideline to determine how much, if any, you
must offset the guideline to produce an accurate cut.
BLADE GUIDE
NOTCH
NOTE: The distance from the line of cut to the guideline is
the amount you should offset the guide.
TO RIP CUT WITHOUT EDGE GUIDE
See Figure 19.
Use a guide when making long or wide rip cuts with the
saw.
GUIDELINE
Fig. 18
Follow these directions to rip cut.
n Secure the workpiece.
n Clamp a straight edge to the workpiece using
C-clamps.
n Saw along the straight edge to achieve a straight rip
cut.
STRAIGHT
EDGE
NOTE: Do not bind the blade in the cut.
TO RIP CUT WITH EDGE GUIDE
See Figure 19.
GUIDELINE
Follow these directions to use the edge guide.
n Secure the workpiece.
n Position the face of the edge guide firmly against the
edge of workpiece.
n Guide the saw along the edge to achieve a straight rip
C-CLAMPS
cut.
NOTE: The guiding edge of the workpiece must be straight
for your cut to be straight. Use caution to prevent the
blade from binding in the cut.
WORKPIECE
WORKPIECE
GUIDELINE
EDGE GUIDE
Fig. 19
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OPERATION
BEVEL CUTTING
See Figures 20 - 21.
MOTOR
HOUSING
To make the best possible cut, follow these helpful hints.
n Align the line of cut with the inner blade guide notch on
the base when making 45° bevel cuts.
n Make a trial cut in scrap material along a guideline to
determine how much you should offset the guideline on
the cutting material.
n Adjust the angle of the cut to any desired setting between
zero and 51.5°. Refer to “TO ADJUST BEVEL SETTING”
next.
BEVEL SCALE
TO ADJUST BEVEL SETTING
See Figure 20.
Follow these directions to adjust the bevel setting.
n Unplug your circular saw.
WARNING:
BEVEL
ADJUSTMENT
KNOB
Failure to unplug the tool could result in accidental start-
ing causing serious injury.
BLADE GUIDE NOTCH
Fig. 20
n Loosen bevel adjustment knob.
n Raise motor housing end of saw until you reach desired
angle setting on bevel scale.
n Tighten bevel adjustment knob securely.
WARNING:
Attempting a bevel cut without having the bevel ad-
justment knob securely tightened can result in serious
injury.
TO BEVEL CUT
See Figure 21.
Follow these directions to bevel cut.
n Hold the saw firmly with both hands as shown.
n Rest the front edge of the base on the workpiece.
n Start the saw and let the blade reach full speed.
n Guide the saw into the workpiece and make the cut.
Fig. 21
n Release the trigger and allow the blade to come to a
complete stop.
n Lift the saw from the workpiece.
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OPERATION
POSITIVE 0° BEVEL STOP
See Figure 22.
The saw has a positive 0° bevel stop that has been factory
adjusted to assure 0° angle of the saw blade when making
90° cuts.
TO CHECK POSITIVE 0° BEVEL STOP
Follow these directions to check the positive 0° bevel
stop.
BEVEL
ADJUSTMENT KNOB
n Unplug your circular saw.
WARNING:
CARPENTER’S
SQUARE
Failure to unplug the tool could result in accidental start-
ing causing serious injury.
n Place the saw in an upside down position on a work-
bench.
n Check the squareness of the saw blade to the base of
the saw using a carpenter’s square.
TO ADJUST POSITIVE 0° BEVEL STOP
Follow these directions to adjust the positive 0° bevel
stop.
n Unplug your circular saw.
WARNING:
SETSCREW
Failure to unplug the tool could result in accidental start-
ing causing serious injury.
n Loosen bevel adjustment knob.
n Turn setscrew with hex key and adjust base until it is
square with the saw blade.
Fig. 22
n Tighten bevel adjustment knob securely.
WARNING:
Attempting a bevel cut without having the bevel ad-
justment knob securely tightened can result in serious
injury.
LENGTH OF CUT SCALE
See Figure 23.
The saw is equipped with a length of cut scale on its base. It
is parallel with the saw blade and you can use it to measure
the distance into the material the blade cuts.
NOTE: Six inches is the maximum length of cut that you can
measure. Also, it is accurate only when the depth of cut is
set at full maximum depth.
LENGTH OF CUT
SCALE
Fig. 23
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OPERATION
n Release the trigger and allow the blade to come to a
POCKET CUTTING
See Figure 24.
complete stop.
n Lift the saw from the workpiece.
n Clear corners out with a hand saw or sabre saw.
WARNING:
Always adjust bevel setting to zero before making a
pocket cut. Attempting a pocket cut at any other setting
can result in loss of control of the saw possibly causing
serious injury.
WARNING:
Never tie the lower blade guard in a raised position. Leav-
ing the blade exposed could lead to serious injury.
Follow these directions to pocket cut.
n Adjust the bevel setting to zero.
n Set the blade to the correct blade depth setting.
n Swing the lower blade guard up using the lower blade
guard handle.
LOWER
BLADE
GUARD
NOTE: Always raise the lower blade guard with the handle
to avoid serious injury.
n Hold the lower blade guard by the handle.
n Rest the front of the base flat against the workpiece with
the rear of the handle raised so the blade does not touch
the workpiece.
n Start the saw and let the blade reach full speed.
n Guide the saw into the workpiece and make the cut.
WARNING:
LOWER BLADE
POCKET
CUT
Always cut in a forward direction when pocket cutting.
Cutting in the reverse direction could cause the saw to
climb up on the workpiece and back toward you.
GUARD HANDLE
Fig. 24
ADJUSTMENTS
nOnce alignment is achieved tighten the screw.
nReplace the laser cover.
WARNING:
Before performing any adjustment, make sure the tool
is unplugged from the power supply and the switch is in
the OFF ( O ) position. Failure to heed this warning could
result in serious personal injury.
nCheck for proper alignment.
nRepeat as necessary until laser is aligned.
LASER
COVER
ADJUSTING THE LASER
See Figure 25.
SCREW
nUnplug your circular saw.
nMake sure laser is turned off.
nRemove the laser cover by lifting it off its base.
nTurn laser on.
nLoosen the screw inside laser.
nRest the front of the base on scrap workpiece.
nAdjustthelaserbeamwiththemarkonthescrapworkpiece
by loosening the screw to the laser aperture and slowly
moving laser guide left or right.
nSince blade thicknesses vary, always make a trial cut in
scrap workpiece to ensure an accurate cut.
Fig. 25
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MAINTENANCE
REPLACING LASER GUIDE BATTERIES
See Figure 26.
WARNING:
When servicing use only identical Ryobi replacement
parts. Use of any other parts may create a hazard or
cause product damage.
nUnplug the saw.
nMake sure laser is turned off.
nRemove the laser cover by lifting it off its base.
nRemove both AAA batteries.
WARNING:
nInstall the two AAA batteries aligning the positives (+)
with positives (+) and the negatives (-) with negatives (-)
as shown on the inside base of laser.
Always wear safety goggles or safety glasses with side
shields during power tool operation or when blowing dust.
If operation is dusty, also wear a dust mask.
nReplace the laser cover.
nTurn on laser.
GENERAL MAINTENANCE
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.
CAUTION:
Use of controls or adjustments or performance other
than those specified herein may result in hazardous
radiation exposure.
WARNING:
Do not at any time let brake fluids, gasoline, petroleum-
based products, penetrating oils, etc., come in contact
with plastic parts. Chemicals can damage, weaken or de-
stroy plastic which may result in serious personal injury.
Electric tools used on fiberglass material, wallboard, spack-
ling compounds, or plaster are subject to accelerated wear
and possible premature failure because the fiberglass chips
and grindings are highly abrasive to bearings, brushes, com-
mutators, etc. Consequently, we do not recommended using
this tool for extended work on these types of materials. How-
ever, if you do work with any of these materials, it is extremely
important to clean the tool using compressed air.
LUBRICATION
All of the bearings in this tool are lubricated with a sufficient
amount of high grade lubricant for the life of the unit under
normaloperatingconditions.Therefore,nofurtherlubrication
is required.
Fig. 26
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NOTES
22
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NOTES
23
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OPERATOR'S MANUAL
7-1/4 in. LASER CIRCULAR SAW
DOUBLE INSULATED
CSB140LZ
• 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
complete list of Authorized Service Centers.
• 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 model number and serial number in the space provided below.
• HOW TO ORDER REPAIR PARTS
WHEN ORDERING REPAIR PARTS,
ALWAYS GIVE THE FOLLOWING INFORMATION:
CSB140LZ
• MODEL NUMBER
• SERIAL NUMBER
RYOBI TECHNOLOGIES, INC.
1428 Pearman Dairy Road Anderson, SC 29625
Post Office Box 1207, Anderson, SC 29622-1207
Phone 1-800-525-2579
983000-474
4-04
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