Ryobi TR31 User manual

THANK YOU FOR BUYING A RYOBI LAMINATE TRIMMER.
Your new trimmer has been engineered and manufactured to Ryobi’s high standard for dependability, ease of operation, and
operator safety. Properly cared for, it will give you years of rugged, trouble-free performance.
CAUTION: Carefully read through this entire owner’s manual before using your new trimmer.
Pay close attention to the Rules for Safe Operation, Warnings, and Cautions. If you use your trimmer properly and only for
what it is intended, you will enjoy years of safe, reliable service.
Thank you again for buying Ryobi tools.
OPERATOR’S MANUAL
LAMINATE TRIMMER - MODEL TR31
DOUBLE INSULATED
SAVE THIS MANUAL FOR FUTURE REFERENCE
SPECIFICATIONS:
Maximum Cutter Diameter 1-3/8 in. (34.9 mm)
Collet 1/4 in. (6.4 mm)
Horsepower 3/4
Rating 120 volts, 60 Hz AC only, 3.8 amperes
No Load Speed 23,000 RPM
Power Cord 10 ft. (3 m)
Net Weight 3.0 lbs. (1.4 kg.)

Page 2
TABLE OF CONTENTS
1. Introduction............................................................................................................................1
2. Typical Application.................................................................................................................2
3. Rules For Safe Operation...................................................................................................3-5
4. Unpacking .............................................................................................................................6
5. Features .............................................................................................................................6-7
6. Adjustments........................................................................................................................7-8
7. Operation..........................................................................................................................9-11
8. Helpful Hints ......................................................................................................................12
9. Accessories ................................................................................ ..................................12-14
10. Maintenance........................................................................................................................15
TYPICAL APPLICATION
Fig. 1

Page 3
RULES FOR SAFE OPERATION
DOUBLE INSULATION
YourRyobipower toolisdouble insulated.Doubleinsulation
isa conceptin safety,inelectricpowertools,which eliminates
the need for the usual three-wire grounded power cord. All
exposed metal parts are isolated from internal metal motor
componentswith protectinginsulation. Doubleinsulatedtools
do not need to be grounded.
IMPORTANT
Servicing of a tool with double insulation requires extreme
careandknowledge ofthesystem andshouldbe performed
onlyby aqualified servicetechnician. Forservice wesuggest
you return the tool to your nearest RYOBI AUTHORIZED
SERVICE CENTER for repair. When servicing use only
identical Ryobi replacement parts.
The purpose of safety symbols is to attract your attention to possible dangers. The safety symbols, and the
explanations with them, deserve your careful attention and understanding. The safety warnings do not by
themselveseliminate anydanger. Theinstructions or warningsthey giveare not substitutesfor properaccident
prevention measures.
SYMBOL MEANING
SAFETY ALERT SYMBOL:
Indicates danger, warning, or caution. May be used in conjunction with other symbols or pictographs.
DANGER:Failureto obeya safetywarning willresultin seriousinjury toyourselfor toothers. Alwaysfollow
the safety precautions to reduce the risk of fire, electric shock and personal injury.
WARNING:Failuretoobeyasafetywarningcanresultinseriousinjurytoyourselfortoothers.Alwaysfollow
the safety precautions to reduce the risk of fire, electric shock and personal injury.
CAUTION:Failure to obey a safety warning may result in property damage or personal injury to yourself or
to others. Always follow the safety precautions to reduce the risk of fire, electric shock and personal injury.
NOTE: Advises you of information or instructions vital to the operation or maintenance of the equipment.
WARNING:
The double insulated system is intended to protect the
user from shock resulting from a break in the tool's
internal wiring. Observe all normal safety precautions
related to avoiding electrical shock.
WARNING:
Do not attempt to operate this tool until you have read
thoroughly and understand completely all instructions,
safety rules, etc. contained in this manual. Failure to
comply can result in accidents involving fire, electric
shock, or serious personal injury. Save operator's manual
and review frequently for continuing safe operation, and
instructing others who may use this tool.

Page 4
RULES FOR SAFE OPERATION
■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 acci-
dents.
■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.
■Do not overreach. Keep proper footing and balance
at all times. Proper footing and balance enables better
control of the tool in unexpected situations.
■Use safety equipment. Always wear eye protection.
Dust mask, nonskid safety shoes, hard hat, or hearing
protection must be used for appropriate conditions.
Tool Use and Care
■Use clamps or other practical way to secure and sup-
port the workpiece to a stable platform. Holding the
work by hand or against your body is unstable and may
lead to loss of control.
■Do not force tool. Use the correct tool for your appli-
cation. The correct tool will do the job better and safer at
the rate for which it is designed.
■Do not use tool if switch does not turn it on or off.
Any tool that cannot be controlled with the switch is dan-
gerous and must be repaired.
■Disconnect the plug from the power source before
making any adjustments, changing accessories, or
storing the tool. Such preventive safety measures re-
duce risk of starting the tool accidentally.
■Store idle tools out of reach of children and other
untrained persons. Tools are dangerous in the hands of
untrained users.
■Maintain tools with care. Keep cutting tools sharp and
clean.Properly maintainedtools withsharpcuttingedges
are less likely to bind and are easier to control.
■Check for misalignment or binding of moving parts,
breakage of parts, and any other condition that may
affect the tool's operation. If damaged, have the tool
serviced before using. Many accidents are caused by
poorly maintained tools.
■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.
Service
■Tool service must be performed only by qualified re-
pair personnel. Service or maintenance performed by
unqualified personnel could result in a risk of injury.
■When servicing a tool, use only identical replacement
parts. Follow instructions in the Maintenance section
of this manual. Use of unauthorized parts or failure to
followMaintenanceInstructions maycreate arisk ofelec-
tric shock or injury.
WARNING:
Read and understand all instructions. Failure to
followallinstructionslistedbelow, may result in elec-
tric 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.
■Do not operate power tools in explosive atmo-
spheres, such as in the presence of flammable liq-
uids, gases, or dust. Power tools create sparks which
may ignite the dust or fumes.
■Keep bystanders, children, and visitors away while
operating a power tool. Distractions can cause you to
lose control.
Electrical Safety
■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 in-
stall a polarized outlet. Do not change the plug in any
way. Double insulation eliminates the need for the
three wire grounded power cord and grounded power
supply system.
■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.
■Don't expose power tools to rain or wet conditions.
Water entering a power tool will increase the risk of elec-
tric shock.
■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.
■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
■Stay alert, watch what you are doing and use com-
mon sense when operating a power tool. Do not use
tool while tired or under the influence of drugs, alco-
hol, or medication. Amoment of inattention while operat-
ing power tools may result in serious personal injury.
■Dress properly. Do not wear loose clothing or jew-
elry. Contain long hair. Keep your hair, clothing, and
gloves away from moving parts. Looseclothes,jewelry,
or long hair can be caught in moving parts.

Page 5
The operation of any laminate trimmer 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 wear eye protection which is marked to comply with ANSI Z87.1.
WARNING:
Lookforthissymboltopointoutimportantsafetyprecautions.
It means attention!!! Your safety is involved.
SAVE THESE INSTRUCTIONS
WARNING:
Somedustcreatedbypowersanding,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
asthosedustmasksthatarespeciallydesignedtofilter
out microscopic particles.
RULES FOR SAFE OPERATION
■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.
Additional Rules for Safe Operation
■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.
■Always wear safety glasses with side shields. Every-
day eyeglasses have only impact resistant lenses; they
are NOT safety glasses.
■Protect your lungs. Wear a face or dust mask if the
operation is dusty.
■Protect your hearing. Wear hearing protection during
extended periods of operation.
■Hold tool by insulated gripping surfaces when per-
forming 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.
■Inspect tool cords periodically and if damaged, have
repaired at your nearest authorized service center. Stay
constantly aware of cord location.
■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
movingparts,bindingofmovingparts,breakageofparts,
mounting, and any other conditions that may affect its
operation. A guard or other part that is damaged should
beproperlyrepairedorreplacedbyanauthorizedservice
center. Following this rule will reduce the risk of electric
shock, fire, or serious injury.
■Do not abuse cord. Never carry tool by cord or yank
it to disconnect from receptacle. Keep cord from
heat,oilandsharpedges.Followingthisrulewillreduce
the risk of electric shock or fire.
■Make sure your extension cord is in good condition.
Whenusingan extensioncord, besureto useone heavy
enoughto carrythe currentyour productwill draw.Awire
gage size (A.W.G.) of at least 16 is recommended for an
extension cord 100 feet or less in length. A cord exceed-
ing100feetisnotrecommended.Ifindoubt,usethenext
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.
■Drugs, Alcohol, Medication. Do not operate tool while
under the influence of drugs, alcohol, or any medication.
Following this rule will reduce the risk of electric shock,
fire, or serious injury.
■Save these instructions. Refer to them frequently and
use them to instruct others who may use this tool. If you
loansomeonethistool,loanthemtheseinstructionsalso.
GLASSES
SAFETY
WEAR YOUR
FORESIGHT IS BETTER
THAN NO SIGHT

Page 6
KNOW YOUR TRIMMER
See Figure 2.
Before attempting to use your trimmer, familiarize yourself
with all operating features and safety requirements.
Your trimmer is a versatile woodworking tool which will give
you years of trouble-free performance. It is engineered with
the professional in mind, but its ease of operation allows the
amateur to produce work which is beautiful and precise.
As the name implies your trimmer can be used for trimming
laminates. When used with recommended accessories, such
as a straight guide, trimmer guide, template guide, or com-
bination panel bit, it becomes even more versatile.
WARNING:
Do not allow familiarity with your trimmer to make you
careless. Remember that a careless fraction of a second
is sufficient to inflict severe injury.
HEAVY DUTY MOTOR
Your trimmer has a powerful 3.8 amp motor with sufficient
power to handle many trimming jobs. It is capable of deliv-
ering 3/4 horsepower for heavy duty performance. The
motor also has removable brushes for ease of servicing.
SWITCH
To turn your trimmer ON, slide the switch on top of the
trimmer to ON position. Return the switch to OFF position
when finished.
DEPTH OF CUT SCALE
Your trimmer's cutting depth can be adjusted by using the
depth of cut scale. To adjust to desired depth of cut, loosen
the wing bolt and move the base until the tip of the cutter
touches work surface. The depth of cut is zero at this point.
Position your trimmer so that the cutter can extend below
the subbase for desired depth of cut setting. Move the base
further until the mark on the depth of cut scale corresponds
with your desired depth of cut. Then securely tighten the
wing bolt.
UNPACKING
Your trimmer has been shipped completely assembled and
ready for use. After removing it from the carton, inspect it
carefully to make sure no breakage or damage has occurred
during shipping. If any parts are damaged or missing, con-
tact your nearest Ryobi dealer to obtain replacement parts
before attempting to operate trimmer. A subbase accessory
with handles, operator's manual, warranty registration and
two wrenches are included in the carton.
FEATURES
WARNING:
If any parts are missing do not operate your trimmer until
the missing parts are replaced. Failure to do so could
result in possible serious injury.
ELECTRICAL CONNECTION
Your trimmer 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.
WARNING:
The operation of any trimmer can result in foreign objects
being thrown into your eyes, which can result in severe
eye damage. Before starting power tool operation, always
wear safety goggles or safety glasses with side shields
and a full face shield when needed. We recommend wide
vision safety mask for use over eyeglasses or standard
safety glasses with side shields.
WARNING:
Do not attempt to modify this tool or create accessories
not recommended for use with this tool. Any such alter-
ation or modification is misuse and could result in a
hazardous condition leading to possible serious personal
injury.
APPLICATIONS
(Use only for the purpose listed below)
■Smooth, professional trimming of laminates.
■Cabinet making, trimming counter tops, and finishing
work.
■Trimming wood and plastics.
BALL BEARING PILOTED CUTTER
See Figures 1 and 5.
Use of ball bearing piloted trimmer cutters provide a conve-
nient method of laminate trimming. Guide the ball bearing
surface along the edge of workpiece. Be careful to follow
instructions for correct direction of feed .

Page 7
OFF
ON
1
3/4
1/2
FEATURES
WRENCH (2)
MOTOR
HOUSING
ON
OFF
DEPTH OF
CUT SCALE
BRUSH CAP
BASE
COLLET NUT COLLET
SUBBASE
ADJUSTMENTS
Fig. 2
WING BOLT
ON-OFF
SWITCH
WARNING:
Your laminate trimmer should never be connected to
power supply when you are assembling parts, making
adjustments, installing or removing cutters, or when not
inuse.Disconnectingyourtrimmer willprevent accidental
starting that could cause serious injury.
WARNING:
Do not use cutters that are larger in diameter than the
opening in trimmer base. Use of such cutters will come
in contact with the trimmer base and damage both the
cutter and trimmer base. This situation could also cause
possible loss of control or create other hazardous
conditions that could cause possible serious personal
injury.
WARNING:
Do not use cutters with undersized shanks. Undersized
shankswillnot tightenproperlyand could bethrown from
tool causing injury.

Page 8
0
1/4
1/2
3/4
1
OFF
ON
1
3/4
1/2
ADJUSTMENTS
INSTALLING/REMOVING CUTTERS
See Figure 3.
■UNPLUG YOUR TRIMMER.
WARNING:
Failure to unplug your trimmer could result in accidental
starting causing serious injury.
■Placeyourtrimmerupsidedownonaworkbenchinorder
to gain easy access to the spindle and collet nut.
■Place the small end of one of the wrenches provided on
the spindle flats. This will hold the spindle stationary.
■Placethelargeendoftheotherwrenchprovidedontothe
collet nut. Rotate wrench counterclockwise to loosen
collet nut. See Figure 3.
WARNING:
If you are changing a cutter immediately after use, be
careful not to touch the cutter or collet with your hands or
fingers. They will get burned because of the heat buildup
from cutting. Always use the wrench provided.
■Ifinstalling cutterforthe firsttime,it canbeinstalled once
colletnutisloose.Ifchangingcutters,cutterwilleasilyslip
from collet after loosening collet nut.
■Thecolletismachinedtoprecisiontolerancestofitcutters
with 1/4 in. (6.4 mm) diameter shanks.
■Withyourtrimmerstillupsidedownonaworkbench,insert
shankofcutter intocollet.Theshankofyourcuttershould
be close to but not touching bottom of collet. This allows
for expansion when the cutter gets hot.
■Tighten the collet nut securely by turning clockwise with
the wrench provided. See Figure 3.
WARNING:
If collet nut is not tightened securely, cutter may come
out during use, causing serious personal injury.
WARNING:
Avoidopenareaoftrimmerbase.Seriouspersonalinjury
will result from contact with a rotating cutter.
TO SET DEPTH OF CUT
See Figure 4.
■UNPLUG YOUR TRIMMER.
WARNING:
Failure to unplug your trimmer could result in accidental
starting causing serious injury.
■Loosen the wing bolt and move the base until the tip of
cutter touches the work surface. The depth of cut is zero
at this point. See Figure 4.
■Positionyour trimmersothatthecutter canextend below
the subbase for desired depth of cut setting.
■Move the base to obtain the desired depth of cut. The
distancethecutter movescan be readon thedepthof cut
scale.Eachmarkonthescaleindicatesa1/16in.(1.6mm)
changeindepthsetting.Indicatorpointsarelocatedonthe
base.
■Securely tighten the wing bolt.
WRENCH ON
SPINDLE FLATS
WRENCH ON
COLLET NUT
CUTTER
Fig. 3
Fig. 4
DEPTH OF
CUT SCALE
INDICATOR
POINT(S)
INDICATOR
POINT(S)
WING
BOLT

Page 9
OPERATION
WARNING:
Always wear safety goggles or safety glasses with side
shields when using your trimmer. Failure to do so could
result in dust, shavings, chips, loose particles, or foreign
objects being thrown into your eyes resulting in possible
serious injury. If the operation is dusty, also wear a face
or dust mask.
WARNING:
When turning your trimmer ON, be prepared for start-up
torque. Always have a firm grasp of your trimmer before
starting. Because of the high cutter speed rotation your
trimmerhas atendency totwist,jerk,orgrabinyour hands
during start-up. If not prepared, this can cause a loss of
control resulting in possible serious injury.
HOW TO OPERATE YOUR TRIMMER
Before startingyourtrimmer,unplug itandmake surecutter
issecurelytightenedincolletandthatdepthofcutisproperly
set.Neverstarttrimmerwhilecutterisincontactwiththe
workpiece.
After completing a cut, pull cutter slightly away from cut
surface. Turn trimmer off and wait for rotating cutter to
completely stop before removing base from work surface.
Yourtrimmer isturned onbymeansofa slideswitchlocated
on top of the tool. Make a few cuts on a piece of scrap
material to determine the desired depth or shape of cut.
When cutting, fit the base of your trimmer over the work
surface and firmly hold the body of your trimmer with your
hand.Makesurethetrimmerisrunningatfullspeed.Forbest
results, move your trimmer from left to right, against the
turning direction of the cutter. See Figure 5. Be sure not to
move trimmer too rapidly.
Remain alert and watch what you are doing. DO NOT
operate trimmer when fatigued or under the influence of
drugs, alcohol, or any medication.
FEED DIRECTION
Whentrimming, thecutter rotatesclockwise.Therefore,you
should feed the trimmer into the workpiece from left to right.
When fed from left to right, the rotation of the cutter pulls the
trimmer against the workpiece. If fed in the opposite direc-
tion, the rotation forces of the spinning cutter will tend to
throw the trimmer away from the workpiece. This could
cause loss of control of your trimmer.
RATE OF FEED
IMPORTANT: The whole “secret” of professional laminate
trimmingliesin makinga carefulsetupfor thecut tobemade
and in selecting the proper rate of feed.
Theproperrateoffeeddependsonseveralfactors: thehard-
ness and moisture content of the workpiece, the depth of
cut,andthe cuttingdiameter ofthe cutter.Whencutting shal-
low grooves in soft woods such as pine, a faster rate of feed
can be used. When making cuts in hardwoods such as oak,
a slower rate of feed will be required.
The best rate of feed is one that does not slow down the
trimmer motor more than one-third of its no-load speed. If
the trimmer is fed too fast, it will take large chips out of the
wood and leave gouge marks. If the trimmer is fed too slow,
it will scorch or burn the wood.
PROPER FEEDING
The right feed is neither too fast nor too slow. It is the rate at
which the cutter is being advanced firmly and surely to pro-
duce a continuous spiral of uniform chips or a smooth trim
edge on laminate. If you are making a small diameter, shal-
low groove in soft, dry wood, the proper feed may be about
as fast as you can travel your trimmer along your guide line.
On the other hand, if the cutter is a large one, the cut is
deep or the workpiece is hard to cut, the proper feed may
be a very slow one. A cross-grain cut may require a slower
pace than an identical with-grain cut in the same workpiece.
There is no fixed rule. You will learn by experience from
practice and use. The best rate of feed is determined by
listening to the sound of the trimmer motor and by feeling
the progress of each cut.Always test a cut on a scrap piece
of the workpiece wood or laminate beforehand.
FORCE FEEDING
Clean, smooth laminate trimming and edge shaping can be
done only when the cutter is revolving at a relatively high
speed and is taking very small bites to produce tiny, cleanly
severed chips. If your trimmer is forced to move forward too
fast, the speed of the cutter becomes slower than normal in
relationtoits forward movement.As aresult,the cuttermust
take bigger bites as it revolves. “Bigger bites” mean bigger
Fig. 5

Page 10
chips, and a rougher finish. Bigger chips also require more
power, which could result in the trimmer motor becoming
overloaded.
Under extreme force-feeding conditions the relative speed
of the cutter can become so slow — and the bites it has to
takesolarge —that chipswillbe partiallyknocked off(rather
than fully cut off), with resulting splintering and gouging of
the workpiece. See Figure 6.
Your trimmer is an extremely high-speed tool (23,000 RPM
no-load speed), and will make clean, smooth cuts if allowed
to run freely without the overload of a forced (too fast) feed.
Three things that cause “force feeding” are cutter size,
depth-of-cut, and workpiece characteristics. The larger the
cutter or the deeper the cut, the more slowly the trimmer
should be moved forward. If the wood is very hard, knotty,
gummy or damp, the operation must be slowed still more.
You can always detect “force feeding” by the sound of the
motor. Its high-pitched whine will sound lower and stronger
as it loses speed. Also, the strain of holding the tool will be
noticeably increased.
TOO SLOW FEEDING
It is also possible to spoil a cut by moving the trimmer for-
wardtooslowly. Whenit isadvanced intothe worktooslowly,
a revolving cutter does not dig into new wood fast enough
to take a bite; instead, it simply scrapes away sawdust-like
particles. Scraping produces heat, which can glaze, burn,
or mar the cut — in extreme cases, it can even overheat the
cutter so as to destroy its hardness. Dull cutters can also
contribute to scraping and burning.
In addition, it is more difficult to control a trimmer when the
cutter is scraping instead of cutting. With practically no load
on the motor the cutter will be revolving at close to top RPM,
and will have a much greater than normal tendency to
bounce off the sides of the cut (especially, if the wood has a
pronounced grain with hard and soft areas).As a result, the
cut produced may have sides that are rippled instead of
straight.
“Too-slow feeding” can also cause your trimmer to take off
in a wrong direction from the intended line of cut. You can
detect “too-slow feeding” by the high-pitched sound of the
motor. Always grasp and hold your trimmer firmly when
trimming.
DEPTH OF CUT
See Figure 7.
As previously mentioned, the depth of cut is important
because it affects the rate of feed which, in turn, affects the
quality of a cut (and, also, the possibility of damage to your
trimmermotorand cutter).Adeepcutrequiresaslower feed
thanashallowone,andatoodeepcutwillcauseyoutoslow
the feed so much that the cutter is no longer cutting, it is
scraping, instead.
Makingadeep cutis neveradvisable. Thesmallercutters—
especially those only 1/16 in. (1.6 mm) in diameter — are
easily broken off when subjected to too much side thrust. A
OPERATION
Fig. 6
TOO FAST
TOO SLOW
Fig. 7
largeenoughcuttermaynotbebrokenoff,butifthecutistoo
deep a rough cut will result — and it may be very difficult to
guide and control the cutter as desired. For these reasons,
werecommendthatyoudonotexceed1/8in.(3.2mm)depth
of cut in a single pass, regardless of the cutter size or the
softness or condition of the workpiece. This will result in a
higher quality cut.
To make deeper cuts it is therefore necessary to make as
many successive passes as required, lowering the cutter
1/8 in. (3.2 mm) for each new pass. In order to save time,
do all the cutting necessary at one depth setting, before
lowering the cutter for the next pass. This will also assure
a uniform depth when the final pass is completed.
WARNING:
If desired depth of cut is greater than can be safely cut in
one pass, make cuts in two or more passes.
WIDTH
OF CUT
DEPTH
OF CUT
2ND.
PASS
1ST.
PASS 1ST. PASS
2ND. PASS

Page 11
DIRECTION OF FEED AND THRUST
See Figures 8 and 9.
The trimmer motor and cutter revolve in a clockwise direc-
tion. This gives the tool a slight tendency to twist (in your
hands) in a counterclockwise direction, especially when the
motor starts.
Becauseoftheextremelyhighspeedofcutterrotationduring
a “proper feeding” operation, there is very little kickback to
contend with under normal conditions. However, should the
cutterstrikeaknot,hardgrain,foreignobject,etc.thatwould
affect the normal progress of the cutting action, there will be
aslightkickback—sufficienttospoilthetruenessofyourcut
if you are not prepared. Such a kickback is always in the
direction opposite to the direction of cutter rotation.
To guard against such a kickback, plan your setup and
direction of feed so that you will always be thrusting the tool
— to hold it against whatever you are using to guide the cut
—inthe samedirectionthat theleading edge ofthe cutteris
moving.Inshort,thethrustshouldbeinadirectionthatkeeps
thesharpedgesofthecuttercontinuouslybitingstraightinto
new (uncut) wood.
EXTENSION CORDS
Theuseofanyextensioncordwill causesome lossof power.
To keep the loss to a minimum and to prevent tool
overheating, use an extension cord that is heavy enough to
carry the current the tool will draw.
Awire gage size (A.W.G.) of at least 16 is recommended for
an extension cord 100 feet or less in length. When working
outdoors, use an extension cord that is suitable for outdoor
use. The cord's jacket will be marked WA.
CAUTION:
Keep extension cords away from any trimming area and
position the cord so that it will not get caught on lumber,
tools, etc., during trimming operation.
WARNING:
Check extension cords before each use. If damaged
replaceimmediately.Never usetoolwith adamaged cord
since touching the damaged area could cause electrical
shock resulting in serious injury.
OPERATION
TRIMMER FEED
DIRECTION
BIT
ROTATION
TRIMMER FEED
DIRECTION
TRIMMER FEED
DIRECTION
TRIM END
GRAINS FIRST
THRUST
FEED
GUIDE
FEED
GUIDE INSIDE
GUIDE OUTSIDE
THRUST Fig. 9
Fig. 8
GUIDE
BIT
ROTATION
ROTATION
ROTATION

Page 12
ACCESSORIES
Standard accessories included with your laminate trimmer
are two wrenches. A subbase accessory with two handles is
also included.
The following is a list of optional accessories available for
your Laminate Trimmer:
Part No. Description
6072373 Trimmer Guide
4675208 Straight Trim Bit
6072063 Straight Guide
HELPFUL HINTS
✓Always clamp workpiece securely before trimming.
✓A safe operator is one who thinks ahead.
✓Always wear eye protection when trimming.
✓Make setup adjustments carefully. Then double check.
Measure twice and cut once.
✓Keep cutters clean and properly sharpened.
✓Don’t let familiarity make you careless.
✓Study all safety rules and do the job safely.
✓NEVER place your hands in jeopardy.
✓ Make certain clamps can’t loosen while in use.
✓Test difficult setups on scrap — Don’t waste lumber.
✓Plan each operation before you begin.
✓Provide for smoother operation by cleaning your
trimmer frequently. Shake trimmer or blow with an air
jet to remove sawdust buildup.
✓THINK SAFETY BY THINKING AHEAD. Fig. 10
Fig. 11
EDGE SHAPING WITH OPTIONAL TRIMMER GUIDE
WARNING:
Avoid hand positions that may expose fingers to cutter
through open areas of trimmer base. See Figure 11.

Page 13
R2
R2
R3
1
2
1/4
1/2
3/4
1
Fig. 12
ACCESSORIES
TRIMMING WITH SUBBASE ACCESSORY
See Figures 12 and 15.
Asubbaseaccessoryispackedintheboxwithyourtrimmer.
If desired, the existing subbase can be removed and this
accessory attached.
Itisconvenientwhenrouting4in.(101.6mm),5in.(127 mm),
or 6 in. (152.4 mm) circular grooves. It can also be used
when routing grooves parallel to the edge of the workpiece.
The handles provided allow you to grasp and hold your
trimmer with two hands similar to grasping and holding a
router.
TO ATTACH SUBBASE ACCESSORY
See Figure 12.
■Unplug your trimmer.
WARNING:
Failure to unplug your trimmer could result in accidental
starting causing serious injury.
■Turn your laminate trimmer upside down, remove the
four subbase screws and subbase.
■Attach your subbase accessory using the same four
subbase screws.
■Tighten subbase screws securely, but do not overtighten.
■Turn your laminate trimmer upright and thread the
handles provided into the threaded holes in the subbase
accessory.
■Tighten handles securely.
ROUTING GROOVES IN A CIRCLE
See Figure 13.
■There are three holes marked R2", R2-1/2", and R3" on
the subbase accessory. Each number represents a ra-
dius and may be used when cutting circular grooves that
are 4 in. (101.6 mm), 5 in. (127 mm) or 6 in. (152.4 mm)
in diameter.
■Select the radius for the desired circle, place a finishing
nail through the hole and securely tack it into your
workpiece. This will create a pivot axis for that size
radius.
■Rout circular groove in a clockwise direction only. See
arrow shown in figure 13.
SUBBASE
SCREW(S)
SUBBASE
ACCESSORY
HANDLE(S)
LAMINATE
TRIMMER
ROUT CIRCULAR GROOVE CLOC WISE
R2
R2
R3
1
2
1/4
1/2
3/4
1
Fig. 13
WOR PIECE
FINISHING
NAIL

Page 14
R2
R2
R3
1
2
1/4
1/2
3/4
1
Fig. 14
Fig. 15
R2
R2
R3
1
2
1/4
1/2
3/4
1
ACCESSORIES
ROUTING GROOVES PARALLEL TO AN EDGE
See Figures 14 and 15.
You can use the scale provided on the subbase accessory
to cut a straight parallel line up to 1 in. (25.4 mm) from the
edge of your workpiece.
■The intersection of the horizontal and vertical lines at
the center of the subbase accessory indicates the cen-
ter of your cutter. This is also the center of groove being
cut.
■If you have purchased an optional straight guide, place
cutter at desired position on the workpiece and make
your cut from left to right as shown by the arrow in
figure 14.
■In this case the thrust is from straight guide towards
the cutter or trimmer.
■For grooves more than 1 in. (25.4 mm) from the edge
of workpiece, align the center of desired groove on
workpiece with centerline on subbase accessory. Then
measure from the centerline on subbase accessory to
the guiding portion of straight guide. Tighten knob on
the straight guide securely.
■If you are using "C" clamps and a board to act as your
straight edge, place cutter at desired position on the
workpiece and make your cut from right to left as
shown by the arrow in figure 15.
■Note: The board being used as a straight edge must
be 1/4 in. (6.4 mm) thick or less to prevent contact with
trimmer base. It must also be at least as long as the
workpiece in order to be a guide.
■In this case the thrust is from your trimmer against the
straight edge.
■As mentioned previously, do not make too heavy of a
cut in one pass. If a deep cut is required, make suc-
cessive passes at increasing depths with each new
pass until you reach the desired groove depth.
ROUT GROOVE FROM LEFT TO RIGHT
ROUT GROOVE FROM RIGHT TO LEFT

Page 15
MAINTENANCE
WARNING:
When servicing use only identical Ryobi replacement
parts. Use of any other parts may create a hazard or
cause product damage.
BRUSH REPLACEMENT
See Figure 16.
Your trimmer has externally accessible brush assemblies
that should periodically be checked for wear. Proceed as
follows when replacement is required:
■UNPLUG YOUR TRIMMER.
WARNING:
Failure to unplug your trimmer could result in accidental
starting causing serious injury.
■Remove brush cap with a flat blade screwdriver. Brush
assembly is spring loaded and will pop out when you
remove brush cap.
■Remove brush assembly (brush and spring).
■Check for wear. If worn, always replace in pairs. DO
NOT replace one side without replacing the other .
■Reassemble using new brush assemblies. Make sure
curvature of brush matches curvature of motor and that
brush moves freely in brush tube.
■Make sure brush cap is oriented correctly (straight) and
replace.
■Tighten brush cap securely. DO NOT over torque.
PROPER CARE OF CUTTERS
Get faster more accurate cutting results by keeping cutters
clean and sharp. Remove all accumulated pitch and gum
from cutters after each use.
When sharpening cutters, sharpen only the inside of the
cutting edge. Never grind the outside diameter. Be sure
when sharpening the end of a cutter to grind the clearance
angle the same as originally ground.
PROPER CARE OF COLLET
From time to time, it also becomes necessary to clean your
collet and collet nut. To do so, simply remove collet nut from
colletandclean thedustand chipsthat have collected.Then
return collet nut to its original position.
GENERAL
Avoid using solvents when cleaning plastic parts. Most
plastics are susceptible to damage from various types of
commercialsolventsand maybe damagedbytheir use.Use
clean cloths to remove dirt, carbon dust, etc.
Fig. 16
BRUSH CAP
BRUSH CAP
BRUSH
ASSEMBLY
BRUSH
ASSEMBLY
WARNING:
Do not at any time let brake fluids, gasoline, petroleum-
based products, penetrating oils, etc. come in contact
with plastic parts. They contain chemicals that can
damage, weaken, or destroy plastic.
Whenelectric toolsareusedonfiberglassboats,sports cars,
wallboard, spackling compounds, or plaster, it has been
foundthatthey aresubjectto acceleratedwear and possible
premature failure, as the fiberglass chips and grindings are
highly abrasive to bearings, brushes, commutators, etc.
Consequently it is not recommended that this tool be used
for extended work on any fiberglass material, wallboard,
spackling compounds, or plaster. During any use on these
materials, it is extremely important that the tool is cleaned
frequently by blowing with an air jet.
WARNING:
Always wear safety goggles, or safety glasses with side
shieldsduringpowertooloperation orwhen blowingdust.
If operation is dusty, also wear a dust mask.
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.

972000-890
OPERATOR'S MANUAL
LAMINATE TRIMMER - TR31
DOUBLE INSULATED
RYOBI TECHNOLOGIES, INC.
1428 Pearman Dairy Road Anderson, SC 29625
Post Office Box 1207 Anderson, SC 29622-1207
Phone [phone]
www.ryobitools.com
• SERVICE
Now that you have purchased your tool, should a need ever exist for repair parts or
service, simply contact your nearest Ryobi Authorized Service Center. Be sure to
provide all pertinent facts when you call or visit. Please call 1-800-525-2579 for your
nearest Ryobi Authorized Service Center. You can also check our web site at
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
TR31