OPERATOR’S MANUAL
7-1/4 in. LASER CIRCULAR SAW
DOUBLE INSULATED
CSB141LZ
Your laser circular saw has been engineered and manufactured to our high standard for dependability, ease of operation,
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 your purchase.
SAVE THIS MANUAL FOR FUTURE REFERENCE
TABLE OF CONTENTS
n Introduction ..................................................................................................................................................................... 2
n Warranty .......................................................................................................................................................................... 2
�n General Safety Rules.................................................................................................................................................... 3-4
�n Specific Safety Rules....................................................................................................................................................4-5
�n Symbols........................................................................................................................................................................ 6-7
��n Electrical.......................................................................................................................................................................... 8
��n Features...................................................................................................................................................................... 9-10
��n Assembly.................................................................................................................................................................. 10-12
�n Operation.................................................................................................................................................................. 13-21
n Adjustments..............................................................................................................................................................22-23
�n Maintenance.................................................................................................................................................................. 23
�n Parts Ordering / Service ................................................................................................................................................ 24
INTRODUCTION
This tool has many features for making its use more pleasant and enjoyable. Safety, performance, and dependability have
been given top priority in the design of this product making it easy to maintain and operate.
WARRANTY
RYOBI® POWER TOOL - LIMITED TWO YEAR WARRANTY AND 30 DAY EXCHANGE POLICY
One World Technologies, Inc., warrants its RYOBI® power tools with the following conditions:
30-DAY EXCHANGE POLICY: During the first 30 days after date of purchase, you may either request service under this
warranty or you may exchange any RYOBI® power tool which does not work properly due to defective workmanship or
materials by returning the power tool to the dealer from which it was purchased. To receive a replacement power tool
or requested warranty service, you must present proof of purchase and return all original equipment packaged with the
original product. The replacement power tool will be covered by the limited warranty for the balance of the two year period
from the date of the original purchase.
WHAT THIS WARRANTY COVERS: This warranty covers all defects in workmanship or materials in your RYOBI® power
tool for a period of two years from the date of purchase. With the exception of batteries, power tool accessories are
warranted for ninety (90) days. Batteries are warranted for two years.
HOW TO GET SERVICE: Just return the power tool, properly packaged and postage prepaid, to an Authorized Service
Center. You can obtain the location of the Service Center nearest you by contacting a service representative at One
World Technologies, Inc., P.O. Box 1207, Anderson, SC 29622-1207, by calling 1-800-525-2579 or by logging on to
www.ryobitools.com. When you request warranty service, you must also present proof of purchase documentation, which
includes the date of purchase (for example, a bill of sale). We will repair any faulty workmanship, and either repair or replace
any defective part, at our option. We will do so without any charge to you. We will complete the work in a reasonable time,
but, in any case, within ninety (90) days or less.
WHAT’S NOT COVERED: This warranty applies only to the original purchaser at retail and may not be transferred. This
warranty only covers defects arising under normal usage and does not cover any malfunction, failure or defects resulting
from misuse, abuse, neglect, alteration, modification or repairs by other than Authorized Service Centers. One World
Technologies, Inc. makes no warranties, representations or promises as to the quality or performance of its power tools
other than those specifically stated in this warranty.
ADDITIONAL LIMITATIONS: Any implied warranties granted under state law, including warranties of merchantability or
fitness for a particular purpose, are limited to two years from the date of purchase. One World Technologies, Inc. is not
responsible for direct, indirect, or incidental damages, so the above limitations and exclusions may not apply to you. This
warranty gives you specific legal rights, and you may also have other rights which vary from state to state.
2 3
GENERAL SAFETY RULES
WARNING:
Read and understand all instructions. Failure to follow
all instructions listed below, may result in electric shock,
fire and/or serious personal injury.
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.
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.
Double insulation eliminates the need for the threewire 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 grounded.
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 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.
n Avoid accidental starting. Be sure switch is off
before plugging in. Carrying tools with your finger on the
switch or plugging in tools that have the switch on invites
accidents.
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.
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.
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.
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.
GENERAL SAFETY RULES
SERVICE
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 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 Do not reach underneath the work. The guard cannot
protect you from the blade below the work.
n Check lower guard for proper closing before each use.
Do not operate saw if lower guard does not move freely
and close instantly. Never clamp or tie the lower guard
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, they must be serviced before use. Lower guard
may operate sluggishly due to damaged parts, gummy
deposits, or a buildup of debris.
n Lower guard should be retracted manually only for
special cuts, such as "Pocket Cuts" and "Compound
Cuts." Raise lower guard by retracting handle. As soon
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 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. This improves the accuracy of the cut and reduces
the chance for blade binding.
n When servicing a tool, use only identical replace-
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 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 Never use damaged or incorrect blade washers
or bolts. The blade washers and bolts were specially
designed for the saw for optimum performance and safety
of operation.
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.
If the blade becomes twisted or misaligned in the cut, the
teeth 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.
Kickback is the result of tool misuse and/or incorrect operating procedures or conditions and can be avoided by taking
proper precautions, as given below:
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
complete stop. Never attempt to remove the saw from
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 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.
4 5
SPECIFIC SAFETY RULES
n Do not use dull or damaged blade. Unsharpened or
improperly set blades produce narrow kerf which causes
excessive friction, blade binding and KICKBACK.
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
existing walls or other blind areas. The protruding blade
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 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.
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 Protect your hearing. Wear hearing protection during
extended periods of operation. Following this rule will
reduce the risk of serious personal injury.
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 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
by an authorized service center. Following this rule will
reduce the risk of shock, fire, or serious injury.
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 Inspect for and remove all nails from lumber before
using this tool. 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 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 Never aim the beam at a person or object other than the
workpiece.
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 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.
SYMBOLS
Some of the following symbols may be used on this 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
V Volts
A Amperes
Hz Hertz
W Watt
min Minutes
Alternating Current
Direct Current
n
o
.../min
No Load Speed
Class II Construction
Per Minute
Wet Conditions Alert
Voltage
Current
Frequency (cycles per second)
Power
Time
Type of current
Type or a characteristic of current
Rotational speed, at no load
Double-insulated construction
Revolutions, strokes, surface speed, orbits etc., per minute
Do not expose to rain or use in damp locations.
Read The Operator’s Manual
Eye Protection
Safety Alert
No Hands Symbol
No Hands Symbol
No Hands Symbol
No Hands Symbol
Hot Surface
To reduce the risk of injury, user must read and understand
operator’s manual before using this product.
Always wear safety goggles, safety glasses with side shields, or
a full face shield when operating this product.
Precautions that involve your safety.
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.
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.
6 7
SYMBOLS
The following signal words and meanings are intended to explain the levels of risk associated with this product.
SYMBOL SIGNAL MEANING
DANGER:
WARNING:
CAUTION:
CAUTION:
Indicates an imminently hazardous situation, which, if not avoided, will
result in death or serious injury.
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
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 the nearest
AUTHORIZED SERVICE CENTER for repair. When servicing, use only identical replacement parts.
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,
safety glasses with side shields, or 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.
WARNING:
To avoid serious personal injury, do not attempt to use this
product until you read thoroughly and understand completely the operator’s manual. Save this operator’s manual
and review frequently for continuing safe operation and
instructing others who may use this product.
SAVE THESE INSTRUCTIONS
ELECTRICAL
DOUBLE INSULATION
Double insulation is a concept in safety in electric power
tools, which eliminates the need for the usual threewire 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.
WARNING:
The double insulated system is intended to protect
the user from shock resulting from a break in the tool’s
internal insulation. Observe all normal safety precautions
to avoid electrical shock.
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 replacement parts when servicing.
ELECTRICAL CONNECTION
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 the tool does
not operate when plugged into an outlet, double-check the
power supply.
EXTENSION CORDS
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
undersized 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.
When working outdoors with a tool, use an extension cord
that is designed for outside use. This type of cord is designated with “WA” on the cord’s jacket.
Before using any extension cord, inspect it for loose or
exposed wires and cut or worn insulation.
**Ampere rating (on tool data plate)
0-2.0 2.1-3.4 3.5-5.0 5.1-7.0 7.1-12.0 12.1-16.0
Cord Length Wire Size (A.W.G.)
25' 16 16 16 16 14 14
50' 16 16 16 14 14 12
100' 16 16 14 12 10 —
**Used on 12 gauge - 20 amp circuit.
NOTE: AWG = American Wire Gauge
WARNING:
Keep the extension cord clear of the working area.
Position 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
replace immediately. Never use tool with a damaged cord
since touching the damaged area could cause electrical
shock resulting in serious injury.
8 9
PRODUCT SPECIFICATIONS
FEATURES
n Blade Diameter ................................................. 7-1/4 in.
n Blade Arbor...........................................................5/8 in.
n Cutting Depth at 0°........................................... 2-3/8 in.
n Cutting Depth at 45°..................................... 1-13/16 in.
n Cutting Depth at 51.5°...................................... 1-5/8 in.
SWITCH
DEPTH
ADJUSTMENT
KNOB
n Input............................ 120 V, 60 Hz, AC Only, 14 Amps
n No Load Speed.............................................5,500 /min.
n Net Weight........................................................... 11 lbs.
n Laser Guide ....................Class IIIa, <5mW max, 650nm
SPINDLE LOCK BUTTON
UPPER BLADE
GUARD
BLADE
LOWER BLADE
GUARD HANDLE
REAR LASER
GUIDE
EDGE GUIDE
HANDLE
DUST CHUTE
LOWER
BLADE
GUARD
BASE
LASER GUIDE
BUTTON
FRONT LASER
GUIDE
EDGE GUIDE
KNOB
BEVEL ADJUSTMENT
KNOB
Fig. 1
FEATURES
KNOW YOUR LASER CIRCULAR SAW
See Figure 1.
Before attempting to use this product, familiarize yourself
with all operating features and safety rules.
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.
EDGE GUIDE
The edge guide is used when making long or wide rip cuts
with the saw.
ERGONOMIC DESIGN
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.
ASSEMBLY
UNPACKING
This product requires assembly.
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
damage occurred during shipping.
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 Lasers
7-1/4 in. Blade
Edge Guide
Dust Nozzle Kit
Wrench
Case
Operator’s Manual
LASER GUIDES
The laser guides will generate a red laser beam on the work
surface in front of and behind the saw when turned on.
SWITCH
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.
SPINDLE LOCK
The spindle lock allows you to secure the blade when turning the blade screw.
NOTE: Do not run circular saw with spindle lock engaged.
WARNING:
If any parts are damaged or missing do not operate this
tool until the damaged or missing parts are replaced.
Failure to heed this warning could result in 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.
WARNING:
Do not connect to power supply until assembly is
complete. Failure to comply could result in accidental
starting and possible serious personal injury.
10 11
ASSEMBLY
WARNING:
A 7-1/4 in. 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.
CAUTION:
To prevent damage to the spindle or spindle lock, always
allow motor to come to a complete stop before engaging
spindle lock.
ATTACHING BLADE
See Figures 2 - 3.
n Unplug the saw.
n Depress spindle lock button.
n Remove blade screw by turning it counterclockwise
with the wrench, while keeping the spindle lock button
depressed.
n Remove spring washer and outer blade washer
(“D” washer).
n Wipe a drop of oil onto the inner flange bushing and outer
blade washer (“D” washer) where they contact blade.
BLADE GUARD
HANDLE
SPRING
WASHER
BLADE
SCREW
OUTER BLADE
WASHER
(“D” WASHER)
OUTER BLADE WASHER
CUPPED SIDE OF
SPRING WASHER
SPINDLE
(“D” WASHER)
INNER
FLANGE
BUSHING
BLADE
OUTSIDE OF SPRING
WASHER
Fig. 2
Fig. 3
WARNING:
If inner flange bushing has been removed, replace it before placing blade on spindle. Failure to do so will prevent
blade from tightening properly and could result in serious
personal injury.
n Retract the lower blade guard into the upper blade guard
using the lower blade guard handle. Make sure the lower
guard spring works properly, allowing the guard to move
freely.
n Check 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.
n Replace spring washer with cupped side against
“D” washer.
n Depress spindle lock button and replace blade screw.
n Tighten blade screw securely by turning it clockwise with
the wrench.
NOTE: Never use a blade that is too thick to allow the
“D” washer to engage with the flat on the spindle.
ASSEMBLY
REMOVING BLADE
See Figure 4.
n Unplug the saw.
n Depress spindle lock button.
n Remove blade screw by turning it counterclockwise with
the wrench.
n Rem ove sprin g washer an d outer blade wa sher
(“D” washer).
n Lift lower blade guard.
n Remove blade.
EDGE GUIDE
See Figure 5.
Use the edge guide when making long or wide rip cuts with
the saw.
n Unplug the saw.
n Place edge guide through holes in base.
n Adjust edge guide to the width needed.
n Tighten edge guide knob securely.
SPINDLE
LOCK BUTTON
BLADE
SCREW
WRENCH
Fig. 4
DUST NOZZLE KIT
See Figure 6.
The dust nozzle kit directs saw dust away from the operator.
The adaptor fits over the dust chute which is located on the
upper blade guard. The nozzle attaches to the adaptor.
NOTE: If you use the nozzle, you should always connect it
to a standard vacuum hose.
n Unplug the saw.
n Lift lower blade guard.
n Orient adaptor to fit into the dust chute opening on upper
blade guard.
n Secure adaptor with screw provided.
n Align hole in nozzle with raised lip on adaptor and snap
into place when using a vacuum hose.
EDGE GUIDE
NOZZLE
EDGE GUIDE
KNOB
Fig. 5
DUST CHUTE
OPENING
RAISED LIP
ADAPTOR
SCREW
HOLE
Fig. 6
12 13
OPERATION
No more than 1/4 inch
WARNING:
Do not allow familiarity with tools to make you careless. Remember that a careless fraction of a second is
sufficient 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
resulting in possible serious injury.
WARNING:
Do not use any attachments or accessories not
recommended by the manufacturer of this tool. The use
of attachments or accessories not recommended can
result in serious personal injury.
KICKBACK - BLADE SET TOO DEEP
Fig. 7
INCORRECT SUPPORT
APPLICATIONS
You may use this tool for the purposes listed below:
n Cross cutting/rip cutting
n Bevel cutting
n Pocket cutting
KICKBACK
See Figures 7 - 9.
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
n Sawing into knots or nails in workpiece
n Twisting the blade while making a cut
n Making a cut with a dull, gummed up, or improperly set
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
Fig. 8
CORRECT SUPPORT
Fig. 9
OPERATION
No more than 1/4 inch
To lessen the chance of kickback:
n Keep the blade at the correct depth setting. The depth
set ting should not exceed 1/4 in. (6.35 mm) be low the
material being cut.
n Inspect the workpiece for knots or nails before cut ting.
Never saw into a knot or nail.
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. Nev er
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.
LOWER BLADE GUARD IS IN UP POSITION
WHEN MAKING A CUT
Fig. 10
WARNING:
When using the saw, always stay alert and exercise control. Do not remove the saw from the workpiece while the
blade is moving.
SAW BLADES
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.
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.
BLADE GUARD SYSTEM
See Figure 10.
The lower blade guard attached to the 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.
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.
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.
14 15
OPERATION
STARTING/STOPPING THE SAW
See Figure 11.
To start the saw: Depress the switch trigger.
Always let the blade reach full speed, then guide the saw
into the workpiece.
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.
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.
WARNING:
Failure to unplug the tool could result in accidental starting causing serious injury.
SWITCH
Fig. 11
DEPTH OF CUT
SCALE
ADJUSTING BLADE DEPTH
See Figure 12.
Always keep correct blade depth setting. The correct blade
depth setting for all cuts should not exceed 1/4 in. 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.
To adjust the blade depth:
n Unplug the saw.
n Loosen depth adjustment knob.
n Determine the desired depth of cut.
n Locate depth of cut scale on back of upper blade
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.
n Tighten depth adjustment knob securely.
BASE
DEPTH ADJUSTMENT
KNOB
Fig. 12
OPERATION
OPERATING THE SAW
See Figures 13 - 15.
It is important to understand the correct method for operating 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 accident 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.
To make the best possible cut:
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. 13
Fig. 14
DANGER:
If the cord hangs up on the workpiece during a cut, release 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. 15
16 17
OPERATION
USING THE LASER GUIDES
See Figure 16.
WARNING:
Do not stare into the laser beams or turn the lasers on
when the tool is not in use. Failure to heed this warning
could result in possible serious personal injury.
The laser guides will generate a red colored laser beam
on the work surface in front of and behind the saw when
turned on. The front laser aids in following the line of cut
when cutting the workpiece. The rear laser aids in aligning
plunge cuts and following the kerf when exiting the
workpiece.
NOTE: The laser units come from the factory already installed
and aligned. If the lasers become misaligned after time, refer
to the Adjustments section later in this manual.
n Mark the line to be cut on the workpiece.
n Adjust the depth and angle of the cut as needed.
n Plug the tool into a power supply and press the laser
guide button to activate the laser.
n Start the motor.
NOTE: Do not touch the blade to the workpiece until the
saw has reached maximum speed.
n Slowly push the saw forward into the workpiece.
NOTE: Keep the laser beam on the marked line on the
workpiece for precision cutting.
n Once the cut is complete, allow the saw to come to a
complete stop before turning off the laser.
n Unplug the saw.
LASER GUIDE
BUTTON
Fig. 16
LENGTH OF CUT SCALE
See Figure 17.
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. 17
OPERATION
CROSS CUTTING/RIP CUTTING
See Figures 18 - 20.
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.
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.
n Secure the workpiece.
n Clam p a straight edge t o th e workpiece usi ng
C-clamps.
n Saw along the straight edge to achieve a straight rip
cut.
NOTE: Do not bind the blade in the cut.
TO RIP CUT WITH EDGE GUIDE
See Figure 20.
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
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.
STRAIGHT
EDGE
C-CLAMPS
TOP VIEW OF SAW
GUIDELINE
BLADE GUIDE
NOTCH
Fig. 18
GUIDELINE
WORKPIECE
Fig. 19
WORKPIECE
GUIDELINE
EDGE GUIDE
Fig. 20
18 19
OPERATION
BEVEL CUTTING
See Figures 21 - 22.
To make the best possible cut:
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°.
TO ADJUST BEVEL SETTING
See Figure 21.
n Unplug the circular saw.
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 adjustment knob securely tightened can result in serious
injury.
BLADE GUIDE NOTCH
MOTOR
HOUSING
BEVEL SCALE
BEVEL ADJUSTMENT
KNOB
Fig. 21
TO BEVEL CUT
See Figure 22.
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.
n Release the trigger and allow the blade to come to a
complete stop.
n Lift the saw from the workpiece.
Fig. 22
OPERATION
POSITIVE 0° BEVEL STOP
See Figure 23.
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
n Unplug the circular saw.
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 combination square.
TO ADJUST POSITIVE 0° BEVEL STOP
n Unplug the circular saw.
n Loosen bevel adjustment knob.
n Turn set screw with hex key and adjust base until it is
square with the saw blade.
n Tighten bevel adjustment knob securely.
WARNING:
BEVEL ADJUSTMENT
KNOB
COMBINATION
SQUARE
Attempting a bevel cut without having the bevel adjustment knob securely tightened can result in serious
injury.
SET SCREW
Fig. 23
20 21
OPERATION
POCKET CUTTING
See Figures 24 - 25.
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.
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.
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.
LOWER BLADE
GUARD
POCKET
CUT
LOWER BLADE
GUARD HANDLE
Fig. 24
WARNING:
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.
n Release the trigger and allow the blade to come to a
complete stop.
n Lift the saw from the workpiece.
n Clear corners out with a hand saw or sabre saw.
WARNING:
Never tie the lower blade guard in a raised position. Leaving the blade exposed could lead to serious injury.
Fig. 25
ADJUSTMENTS
WARNING:
Before performing any adjustment, remove blade from
saw. Failure to do so could result in possible serious
personal injury.
WARNING:
DO NOT point the laser at yourself or others. Class IIIa
lasers will burn the retinas and could cause serious injury
to the eyes.
WARNING:
Use of controls or adjustments or performance other
than those specified herein could result in hazardous
radiation exposure.
ADJUSTING THE LASERS
See Figures 26 - 29.
Two adjusting screws move the laser beams laterally from
left to right. The rear laser can be realigned by adjusting the
screw located in the back of the upper blade guard. The
front laser can be realigned by adjusting the screw located
above the front of the upper blade guard.
The laser beams can also be realigned in a rotational
direction by adjusting the laser barrels.
NOTE: Draw a pencil line on a scrap workpiece parallel to
the long edge of the base as a straight line guide to aid in
the adjusting process.
To adjust the front laser laterally:
n Remove the blade.
n Plug in the saw.
n Turn laser on.
n Rest the front of the base on scrap workpiece.
n Adjust screw as necessary.
n Since blade thicknesses vary, always make a trial cut in
scrap workpiece to ensure an accurate cut.
n Check for proper alignment.
n Repeat as necessary until laser is aligned.
To adjust the rear laser laterally:
n Remove the blade, dust nozzle, and dust nozzle adaptor
if installed.
n Plug in the saw.
n Turn laser on.
n Rest the back of the base on scrap workpiece.
n Adjust screw as necessary.
n Since blade thicknesses vary, always make a trial cut in
scrap workpiece to ensure an accurate cut.
n Check for proper alignment.
n Repeat as necessary until laser is aligned.
FRONT LASER
ADJUSTING SCREW
Fig. 26
REMOVE DUST NOZZLE
AND ADAPTOR
SCREW
Fig. 27
LASER BARREL
Fig. 28
22 23
ADJUSTMENTS
RYLD
Complies with 21CFR parts 1040.10 and 1040.11
RYLD
Conforme aux parties 1040,10 et 1040,11 de 21CFR
Potencia máx. <5mW
Long. de onda: 650 nm
Aparato láser Clase IIIa
Radiación láser, evite el
contacto ocular directo.
Rayonnement laser –
éviter l’exposition
Puissance max. <5 mW
Longueur d’onde : 650 nm
Produit laser de classe IIIa
RYLD
PELIGRO
Complies with 21CFR parts 1040.10
and 1040.11
RYLD
Comple con la norma 21CFR partes
1040.10 y 1040.11
RYLD
Conforme aux parties 1040,10 et
1040,11 de 21CFR
Rayonnement
laser
lorsqu’ouvert,
ÉVITER
L’EXPOSITION
Cetteouverture
produit un
rayonnement
laser.
éviter lecontact
oculairedirect.
PELIGRO
EVITE
EXPONERSE
abierto, evite la
exposición
directa de
losojos.
Radiaciónláser
cuandoestá
Esta abertura
emite radiación
láser.
PELIGRO
EVITE
EXPONERSE
abierto, evite la
exposición
directa de
losojos.
Radiaciónláser
cuandoestá
Esta abertura
emite radiación
láser.
Rayonnement
laser
lors qu’ouvert,
ÉVITER
L’EXPOSITION
Cetteouverture
produit un
rayonnement
laser.
éviter lecontact
oculairedirect.
To adjust the lasers in a rotational direction:
n Remove the blade.
n Plug in the saw.
n Rest the back of the base on scrap workpiece.
n Insert a flathead screwdriver into the laser barrel slot.
n Turn laser on.
NOTE: DO NOT look directly into the laser beam.
n Turn the barrel left or right as necessary.
n Since blade thicknesses vary, always make a trial cut in
scrap workpiece to ensure an accurate cut.
n Check for proper alignment.
n Repeat as necessary until laser is aligned.
WARNING:
Use of controls or adjustments or performance of procedures other than those specified herein could result in
hazardous radiation exposure.
WARNING:
When servicing, use only iden ti cal replacement parts.
Use of any other parts may create a hazard or cause
product damage.
WARNING:
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.
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.
MAINTENANCE
Do not at any time let brake fluids, gasoline, petroleumbased products, penetrating oils, etc., come in contact
with plastic parts. Chemicals can damage, weaken or
destroy plastic which may result in serious personal
injury.
Electric tools used on fiberglass material, wall board, spack ling
compounds, or plaster are subject to ac cel er at ed wear and
possible premature failure be cause the fi ber glass chips and
grindings are highly abrasive to bearings, brushes, com mu ta tors, etc. Consequently, we do not recommended us ing this
tool for extended work on these types of materials. How ev er,
if you do work with any of these materials, it is extremely
important to clean the tool using com pressed 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
normal operating conditions. Therefore, no further lubrication is required.
WARNING:
Fig. 29
OPERATOR’S MANUAL
7-1/4 in. LASER CIRCULAR SAW
DOUBLE INSULATED
CSB141LZ
• SERVICE
Now that you have purchased your tool, should a need ever exist for repair parts or service,
simply contact your nearest Authorized Service Center. Be sure to provide all pertinent
facts when you call or visit. Please call 1-800-525-2579 for your nearest Authorized
Service Center. You can also check our web site at www.ryobitools.com for a 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:
• MODEL NUMBER
• SERIAL NUMBER
Ryobi® is a registered trademark of Ryobi® Limited used under license.
RYOBI TECHNOLOGIES, INC.
1428 Pearman Dairy Road, Anderson, SC 29625
Post Office Box 1207, Anderson, SC 29622-1207
CSB141LZ
Phone 1-800-525-2579
www.ryobitools.com
983000-827
9-05 (REV:00)
24
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