Ryobi HD500 Operation manual

OWNER'S OPERATING MANUAL
1/2 in. (13 mm) Hammer Drill - HD500
DOUBLE INSULATED
SAVE THIS MANUAL FOR FUTURE REFERENCE
THANK YOU FOR BUYING A RYOBI HAMMER DRILL.
YournewhammerdrillhasbeenengineeredandmanufacturedtoRyobi'shighstandardfordependability,easeofoperation,
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 hammer drill. Pay close
attention to the Rules for Safe Operation, Warnings, and Cautions. If you use your hammer drill properly and only for what
it is intended, you will enjoy years of safe, reliable service.
Thank you again for buying Ryobi tools.
SPECIFICATIONS:
Chuck Capacity 5/64 in. (2 mm) - 1/2 in. (13 mm)
Horsepower 3/8
Rating 220 volts, 50 Hz, AC only, 1.75 Amperes
No Load Speed 0-1200 RPM
Hammer Speed 0-19,200 BPM
Hammer Travel .025
Switch Adjustable Variable Speed/Reversible

Page 2
TABLE OF CONTENTS
1. Product Specifications ................................................................................... 1
2. Table Of Contents .......................................................................................... 2
3. Rules For Safe Operation ........................................................................... 2-4
4Operation...................................................................................................5-11
5. Maintenance ................................................................................................ 12
6. Parts Ordering / Service............................................................................... 14
DOUBLE INSULATION
Your Ryobi power tool is double insulated. This means you
areseparatedfromthetool'selectricalsystembytwocomplete
sets of electrical insulation. This extra layer of insulation is
intended to protect the user from electrical shock due to a
break in the wiring insulation. All exposed metal parts are
isolated from the internal metal motor components with
protecting insulation. Double insulated tools do not need to
be grounded.
IMPORTANT
Servicing of a tool with double insulation requires extreme
careand knowledgeof thesystem andshould beperformed
onlybyaqualifiedservicetechnician.Forservicewesuggest
you return the tool to your nearest RYOBI FACTORY
SERVICE CENTER or other AUTHORIZED SERVICE
ORGANIZATIONforrepair.Whenservicinguseonlyidentical
Ryobi replacement parts.
RULES FOR SAFE OPERATION
The purpose of safety symbols is to attract your attention to possible dangers. The safety symbols, and the
explanations with them, deserve your careful attention and understanding. The safety warnings do not by
themselves eliminate any danger. The instructions or warnings they give are not substitutes for proper accident
prevention measures.
SYMBOL MEANING
SAFETY ALERT SYMBOL:
Indicates caution or warning. May be used in conjunction with other symbols or pictographs.
WARNING: Failure to obey a safety warning can result in serious injury to yourself or to others. Always
follow the safety precautions to reduce the risk of fire, electric shock and personal injury.
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:
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 owner's manual
and review frequently for continuing safe operation, and
instructing others who may use this tool.
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.

Page 3
READ ALL INSTRUCTIONS
1. KNOW YOUR POWER TOOL. Read owner's
manual carefully. Learn its applications and
limitations as well as the specific potential
hazards related to this tool.
2. GUARD AGAINST ELECTRICAL SHOCK by
preventing body contact with grounded
surfaces. For example: Pipes, radiators,
ranges, refrigerator enclosures.
3. KEEP GUARDS IN PLACE and in working
order.
4. KEEP WORK AREA CLEAN. Cluttered areas
and benches invite accidents.
5. AVOID DANGEROUS ENVIRONMENT. Don't
use power tool in damp or wet locations or
expose to rain. Keep work area well lit.
6. KEEP CHILDREN AND VISITORS AWAY.
All visitors should wear safety glasses and be
kept a safe distance from work area. Do not
let visitors contact tool or extension cord.
7. STORE IDLE TOOLS. When not in use tools
should be stored in a dry and high or locked-
up place - out of the reach of children.
8. DON'T FORCE TOOL. It will do the job better
and safer at the rate for which it was designed.
9. USE RIGHT TOOL. Don't force small tool or
attachment to do the job of a heavy duty tool.
Don't use tool for purpose not intended - for
example - A circular saw should never be
used for cutting tree limbs or logs.
10. WEAR PROPER APPAREL. Do not wear
loose clothing or jewelry that can get caught
in the tool's moving parts and cause personal
injury. Rubber gloves and nonskid footwear
are recommended when working outdoors.
Wear protective hair covering to contain long
hair and keep it from being drawn into nearby
air vents.
11. ALWAYS WEAR SAFETY GLASSES.
Everyday eyeglasses have only impact-
resistant lenses; they are NOT safety glasses.
12. PROTECT YOUR LUNGS. Wear a face or
dust mask if operation is dusty.
13. PROTECT YOUR HEARING. Wear hearing
protection during extended periods of
operation.
14. DON'T ABUSE CORD. Never carry tool by
cord or yank it to disconnect from receptacle.
Keep cord from heat, oil and sharp edges.
15. SECURE WORK. Use clamps or a vise to
hold work. Both hands are needed to operate
the tool.
16. DON'T OVERREACH. Keep proper footing
and balance at all times. Do not use on a
ladder or unstable support.
17. MAINTAIN TOOLS WITH CARE. Keep tools
sharp at all times, and clean for best and
safest performance. Follow instructions for
lubricating and changing accessories.
18. DISCONNECT TOOLS. When not in use,
before servicing, or when changing
attachments,blades,bits,cutters,etc.,alltools
should be disconnected from power supply.
19. REMOVE ADJUSTING KEYS AND
WRENCHES. Form habit of checking to see
thatkeysandadjustingwrenchesareremoved
from tool before turning it on.
20. AVOID ACCIDENTAL STARTING. Don't
carry plugged-in tools with finger on switch.
Be sure switch is off when plugging in.
21. MAKE SURE YOUR EXTENSION CORD IS
IN GOOD CONDITION. When using an
extension cord, be sure to use one heavy
enough to carry the current your product will
draw. An undersized cord will cause a drop in
line voltage resulting in loss of power and
overheating. A wire gage size (A.W.G.) of at
least 16 is recommended for an extension
cord 100 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.
22. OUTDOOR USE EXTENSION CORDS.
When tool is used outdoors, use only
extension cords suitable for use outdoors.
Outdoor approved cords are marked with
the suffix W-A, for example - SJTW-A or
SJOW-A.
23. KEEP BITS CLEAN AND SHARP. Sharp bits
minimize stalling and kickback.

Page 4
RULES FOR SAFE OPERATION (Continued)
authorized service center unless indicated
elsewhere in this instruction manual.
31. DO NOT USE TOOL IF SWITCH DOES NOT
TURN IT ON AND OFF. Have defective
switches replaced by an authorized service
center.
32. DRILLING INTO ELECTRICAL WIRING IN
WALLS CAN CAUSE DRILL BIT AND
CHUCK TO BECOME ELECTRICALLY
LIFE. Do not touch the chuck or metal housing
when drilling into a wall; grasp only the
insulated handle(s) provided on the tool.
33. INSPECT FOR and remove all nails from
lumber before drilling.
34. DRUGS, ALCOHOL, MEDICATION. Do not
operatetoolwhileundertheinfluenceofdrugs,
alcohol, or any medication.
35. WHEN SERVICING USE ONLY IDENTICAL
RYOBI REPLACEMENT PARTS.
36. POLARIZED PLUGS. To reduce the risk of
electric shock, this tool has 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 the proper outlet. Do not
change the plug in any way.
37. SAVE THESE INSTRUCTIONS. Reviewthem
frequently and use them to instruct others
who may use this tool. If you loan someone
this tool, loan them these instructions also.
24. KEEP HANDS AWAY FROM DRILLING
AREA. Keep hands away from bits. Do not
reachunderneathworkwhilebitisrotating.Do
not attempt to remove material while bit is
rotating.
25. NEVER USE IN AN EXPLOSIVE ATMO-
SPHERE. Normal sparking of the motor could
ignite fumes.
26. INSPECT TOOL CORDS PERIODICALLY
and if damaged, have repaired at your nearest
FACTORY SERVICE CENTER or other
AUTHORIZED SERVICE CENTER. Stay
constantly aware of cord location.
27. INSPECT EXTENSION CORDS PERIODI-
CALLY and replace if damaged.
28. KEEP HANDLES DRY, CLEAN, AND FREE
FROM OIL AND GREASE. Always use a
clean cloth when cleaning. Never use brake
fluids, gasoline, petroleum-based products or
any strong solvents to clean your tool.
29. STAY ALERT. Watch what you are doing
and use common sense. Do not operate tool
when you are tired. Do not rush.
30. 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
The operation of any hammer drill 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.
SAFETY GLASSES
SAFETY GLASSES
FORESIGHTIS BETTER
THAN NO SIGHT
FORESIGHTIS BETTE
R
THAN NO SIGHT
WEAR YOUR
WARNING:
Lookforthissymboltopointoutimportantsafetyprecautions.
It means attention!!! Your safety is involved.

Page 5
APPLICATIONS
(Use only for the purposes listed below)
1. Hammer drilling in concrete and masonry.
2. Drilling in wood.
3. Drilling in ceramics, plastics, fiberglass, and laminates.
4. Drilling in both hard and soft metals.
5. Using driving accessories, such as driving screws with
screwdriver bits.
6. Mixing paints.
ELECTRICAL CONNECTION
Your hammer drill has a precision built Ryobi electric motor.
Itshouldbeconnectedto apower supplythat is220 volts,
50 Hz only. Do not operate this tool on direct current (DC).
A voltage drop of more than 10 percent will cause a loss of
power and the motor will overheat. If this tool does not
operate when plugged into an outlet, double-check the
power supply.
KNOW YOUR HAMMER DRILL
See Figure 1.
Before attempting to use your hammer drill, familiarize
yourselfwithalloperatingfeaturesandsafety requirements.
WARNING:
Donotallowfamiliaritywithyourhammerdrilltomakeyou
careless.Rememberthatacareless fractionof secondis
sufficient to inflict severe injury.
Fig. 1
OPERATION
WARNING:
If any parts are missing do not operate your hammer drill
untilthemissingpartsarereplaced.Failuretodosocould
result in possible serious injury.
AUXILIARY
HANDLE
LOCK-ON
BUTTON
CHUCK KEY
SWITCH
TRIGGER
VARIABLE SPEED
CONTROL SELECTOR
CHUCK
TO REMOVE
CHUCK KEY
STORAGE
TO STORE
DEPTH
GAGE ROD
DEPTH
GAGE CLAMP

Page 6
SWITCH
See Figure 2.
To turn your hammer drill ON, depress the switch trigger.
Release switch trigger to turn your hammer drill OFF.
LOCK-ON BUTTON
See Figure 2.
Yourhammerdrillisequippedwitha"lock-on"feature,which
is convenient when continuous drilling for extended periods
of time is required. To lock-on, depress the switch trigger,
pushinandholdthelock-onbuttonlocatedonthesideofthe
handle, then release switch trigger. Release lock-on button
and your drill will continue running.
To release the lock, depress the switch trigger and release
it.
If you have the "lock-on" feature engaged during use and
your drill becomes disconnected from power supply,
disengage the "lock-on" feature immediately.
WARNING:
Before connecting your hammer drill to power supply
source, always check to be sure it is not in “lock-on”
position (depress and release switch trigger). Failure to
do so could result in accidental starting of your drill
resulting in possible serious injury. Also, do not lock the
trigger on jobs where your drill may need to be stopped
suddenly.
REVERSIBLE
See Figure 3.
Your hammer drill has the feature of being reversible. The
direction of chuck rotation is controlled by a lever located
above the switch trigger. With your drill held in normal
operating position, the direction of rotation lever should be
positioned to the left of the switch for drilling operation. The
directionofrotationisreversed when the lever is to the right
of the switch.
The design of the switch will not permit changing the
direction of rotation while the drill is running. Release
the switch trigger and allow the drill to stop before
changing its direction.
NOTE: Your hammer drill will not run unless switch
lever is pushed fully to the left or right.
CHUCK KEY
See Figure 4.
A chuck key has been provided for use when installing or
removingbits.Itisalsousedwhenremovingthechuck.(See
chuck removal section).
CHUCK KEY STORAGE
See Figure 4.
Whennot inuse, thechuck keycan beplacedinthestorage
area located on the bottom portion of drill handle. Fig. 4
OPERATION
Fig. 2
Fig. 3
LOCK-ON
BUTTON
SWITCH TRIGGER
FORWARD-REVERSE LEVER
REVERSE
FORWARD
CHUCK KEY
STORAGE
TO
REMOVE
TO
STORE

Page 7
VARIABLE SPEED
See Figure 5.
Your hammer drill has a variable speed control selector
designed to allow operator control and adjustment of speed
and torque limits. Speed and torque can be increased or
decreased by rotating the variable speed control selector in
the direction of the arrows shown in figure 5.
NOTE: Hold your hammer drill in normal operating position
and turn the variable speed control selector clockwise to
increase the speed and torque of your hammer drill. Turn
counterclockwise to decrease the speed and torque of your
hammer drill.
If you desire to lock the switch on at a given speed, depress
the switch trigger, push in and hold the lock-on button, and
release the switch trigger. Next, adjust the variable speed
control selector until the desired speed is reached.
NOTE: If the variable speed control selector is fully
turned in the counterclockwise direction (zero setting)
your drill may not run.
If you desire not to use the variable speed control
selector, turn it in the full clockwise direction. This will
allow the speed of your drill to be fully controlled by the
amount of switch trigger depression.
Avoid running your hammer drill at low speeds for extended
periodsoftime.Runningatlowspeedsunderconstantusage
may cause your drill to become overheated. If this occurs,
cool your drill by running it without a load and at full speed.
The following guidelines may be used in determining correct
speed for various applications:
LOW speed is ideal when minimum speed and power is
required. For example: starting holes without center punch-
ing, driving screws, mixing paint, and drilling in ceramics.
MEDIUM speed is suitable for drilling hard metals, plastics,
and laminates.
HIGH speed produces best results when maximum power is
required. For example: drilling in wood; soft metals such as
aluminum,brass,andcopper;andwhenusingdrivingacces-
sories.
INSTALLING AUXILIARY HANDLE
See Figure 6.
An auxiliary handle is packed with your hammer drill for
ease of operation and to help prevent loss of control.
NOTE: For convenience the screw has been trapped inside
the auxiliary handle.
1. Remove depth gage clamp and auxiliary handle from
plastic bag in hammer drill box.
2. Orient depth gage clamp so that the tabs will fit into
motor housing of hammer drill.
3. Threaddepthgage clamp onto auxiliaryhandleuntil it
reaches undercut area of screw threads. Undercut of
screwthreadswillkeepdepthgageclamponauxiliary
handle, preventing it from getting lost.
Fig. 6
Fig. 5
OPERATION
VARIABLE SPEED
CONTROL SELECTOR
TO
INCREASE
SPEED
TO
DECREASE
SPEED
AUXILIARY
HANDLE
DEPTH
GAGE CLAMP
DEPTH
GAGE ROD
TABS
SLOTS
MOTOR
HOUSING

Page 8
OPERATION
INSTALLINGAUXILIARY HANDLE(Continued)
4. Align tabs on depth gage clamp with slots in threaded
hole in motor housing. NOTE: Depth gage clamp can
berotated 180°sothatdepth gagerod willfiton either
side of motor housing.
5. Carefully start the fine screw threads (#3/8-24) into
fine threaded hole in motor housing and tighten
securely. DO NOT cross thread handle bolt in motor
housing.
To prevent thread damage and possible loss of control,
auxiliaryhandleshouldbecheckedperiodicallyfortightness.
DO NOT operate hammer drill with handle loose or with
depth gage clamp removed. In addition to securing depth
gage rod to your hammer drill, depth gage clamp also
provides the proper amount of handle screw thread
engagement when depth gage rod is not being used.
USING DEPTH GAGE ROD
See Figure 7.
Adepth gagerodhasbeenpacked withyour hammerdrill to
assist you in controlling the depth of drilled holes.
1. Installdepthgagerodthrudepthgageclampasshown
in figure 7.
2. Adjust depth gage rod so that the drill bit extends
beyondtheendoftherodtotherequireddrillingdepth.
3. Securely tighten auxiliary handle against depth gage
clamp. This secures depth gage rod at desired depth
of cut. It also secures auxiliary handle.
When drilling holes with the depth gage rod installed, the
desiredholedepthhasbeenreachedwhentheendoftherod
comes in contact with the surface of the material being
drilled.
TO ADJUST DRILLING MODE
See Figure 8.
To adjust for type of drilling, slide adjustment button on side
of motor housing up to hammer mode or down to drilling
mode. For your convenience a hammer symbol and drill bit
symbol have been molded into adjustment button.
NOTE: Adjustment button may be difficult to slide when
changing drilling modes. If this situation occurs, turn you
hammer drill on and slide adjustment button while drill is
running.
WARNING:
Your hammer drill has not been designed for reverse
hammering.
We recommend that you use carbide-tipped bits and select
hammer mode when drilling in hard materials such as brick,
tile, concrete, etc.
We recommend that you select normal drill mode when
drilling with twist drills, hole saws, etc. in soft materials.
Fig. 7
Fig. 8
TO LOOSEN AUXILIARY
HANDLE AND CLAMP
TO
TIGHTEN
AUXILIARY
HANDLE
AND CLAMP
DEPTH
GAGE
CLAMP
DRILLING
DEPTH
TO
INCREASE
DRILLING
DEPTH
TO
DECREASE
DRILLING
DEPTH
DEPTH
GAGE
ROD
DRILL
BIT
PUSH DOWN FOR
DRILLING MODE
ADJUSTMENT
BUTTON
PUSH UP FOR
HAMMER MODE

Page 9
RIGHT
OPERATION
WARNING:
Your hammer drill should never be connected to power
supply when you are assembling parts, making
adjustments, installing or removing drill bits, or when not
in use. Disconnecting your drill will prevent accidental
starting that could cause serious injury.
TO INSTALL BITS
See Figure 9.
1. UNPLUG YOUR HAMMER DRILL.
WARNING:
Failure to unplug your hammer drill could result in
accidental starting causing serious injury.
2. Open or close the chuck jaws to a point where the
opening is slightly larger than the drill bit you intend to
use.Also, raisethefrontofyourdrillslightlytokeep the
drill bits from falling out of the chuck jaws.
3. Insert drill bit into chuck the full length of the jaws.
WARNING:
Do not insert drill bit into chuck jaws and tighten as shown in
figure 10. This could cause drill bit to be thrown from your drill
resultinginpossibleseriouspersonalinjuryordamagetoyour
chuck.
4. Tighten the chuck jaws securely on drill bit, using only
the chuck key provided. Do not use a wrench to
tighten or loosen the chuck jaws.
5. Remove chuck key and return to storage area.
TO REMOVE BITS
1. UNPLUG YOUR HAMMER DRILL.
WARNING:
Failure to unplug your hammer drill could result in
accidental starting causing serious injury.
2. Loosen the chuck jaws using only the chuck key pro-
vided. Do not use a wrench to tighten or loosen the
chuck jaws.
3. Remove drill bit from chuck jaws.
4. Remove chuck key and return to storage area.
CHUCK JAWS
DRILL BIT
WRONG
Fig. 9
Fig. 10

Page 10
WARNING:
Always wear safety goggles or safety glasses with side
shields when operating hammer drill. Failure to do so
could result in dust, shavings, or loose particles being
thrownintoyoureyes,resultinginpossibleseriousinjury.
DRILLING
See Figure 11.
1. Depressandreleasetheswitchtriggertobesureyour
drill is in OFF position before connecting it to power
supply.
2. Checkthedirection of rotationleverfor correct setting
(forward or reverse). See Figure 3, Page 6.
3. Secure the material to be drilled in a vise or with
clamps to keep it from turning as the drill bit rotates.
4. Plug your hammer drill into power supply source.
5. Holdyour drillfirmly andplacethebitat thepoint tobe
drilled.
6. Depress the switch trigger to start your drill. Do not
lock the switch ON for jobs where your drill may need
to be stopped suddenly.
7. Move the drill bit into the workpiece applying only
enough pressure to keep the bit cutting. Do not force
yourdrillorapplysidepressuretoelongateahole.Let
your drill and bit do the work. See Figure 11.
WARNING:
Be prepared for binding or breakthrough. When these
situations occur, drill has a tendency to grab and kick in
the opposite direction and could cause loss of control
whenbreakingthroughmaterial.Ifnotprepared,thisloss
of control can result in possible serious injury.
When drilling hard, smooth surfaces use a center punch to
mark the desired hole location. This will prevent the drill bit
from slipping off center as the hole is started. However, the
variable speed feature allows starting holes without center
punching if desired. To accomplish this, operate your drill at
a low speed until the hole is started.
When drilling metals use a light oil on the drill bit to keep it
from overheating. The oil will prolong the life of the bit and
increase the drilling action.
If the bit jams in the workpiece or if your drill stalls, stop the
tool immediately. Remove the bit from the workpiece and
determine the reason for jamming.
OPERATION
Fig. 11

Page 11
CHUCK REMOVAL
CHUCK REMOVAL
See Figures 12, 13, and 14.
Whenever necessary to remove the chuck for replacement,
etc., use the following procedure for chuck removal:
1. UNPLUG YOUR HAMMER DRILL.
WARNING:
Failure to unplug your hammer drill could result in
accidental starting causing serious injury.
2. Open chuck jaws. Insert a 5/16 inch or larger hex key
wrench (allen wrench) into the chuck of your drill and
tighten the chuck jaws securely.
3. Tap the hex key wrench sharply with a mallet in a
clockwisedirection.
SeeFigure12. Thiswill loosen the
chuck screw for removal.
4. Open the chuck jaws and remove hex key wrench.
Remove the chuck screw by turning it in a clockwise
direction. See Figure 13.
NOTE: The chuck screw has left hand threads.
5. Insert hex key wrench in chuck and tighten chuck jaws
securely. Tap sharply with a mallet in a counterclock-
wisedirection.Thiswillloosenthechuckonthespindle.
It can now be unscrewed by hand. See Figure 14.
TO RETIGHTEN A LOOSE CHUCK
The chuck may at times become loose on the spindle and
developawobble.Also,thechuckscrewmaybecomeloose
causing the chuck jaws to bind and prevent them from
closing. To tighten, follow these steps:
1. UNPLUG YOUR HAMMER DRILL.
WARNING:
Failure to unplug your hammer drill could result in
accidental starting causing serious injury.
2. Insert hex key wrench into chuck and tighten chuck
jawssecurely.Tapallenwrenchsharplywithamalletin
a clockwise direction. This will tighten the chuck on the
spindle. See Figure 12.
3. Open the chuck jaws and remove hex key wrench.
4. Tighten the chuck screw.
NOTE: The chuck screw has left hand threads. See
Figure 13.
Fig. 12
Fig. 14
Fig. 13
OPERATION
CHUCK
CHUCK
JAWS
MALLET
HEX KEY WRENCH
(ALLEN WRENCH)
SCREWDRIVER
HEX KEY WRENCH
(ALLEN WRENCH)
CHUCK
MALLET

Page 12
MAINTENANCE
GENERAL
Avoid using solvents when cleaning plastic parts. Most plas-
ticsaresusceptibletodamagefromvarioustypesofcommer-
cial solvents and may be damaged by their use. Use clean
cloths to remove dirt, carbon dust, etc.
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.
When electric tools are used on fiberglass boats, sports
cars, wallboard, spackling compounds, or plaster, it has
been found that they are subject to accelerated wear and
possible premature failure, as the fiberglass chips and
grindings are highly abrasive to bearings, brushes,
commutators, etc. Consequently it is not recommended that
thistoolbeused for extended work onanyfiberglassmaterial,
wallboard, spackling compounds, or plaster. During any use
on fiberglass it is extremely important that the tool is cleaned
frequently by blowing with an air jet.
EXTENSION CORDS
Theuseofanyextensioncordwillcausesomelossofpower.
To keep the loss to a minimum and to prevent tool from
overheating, use an extension cord that is heavy enough to
carry the current the tool will draw.
Awiregage size (A.W.G.) of at least16 isrecommended 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.
WARNING:
When servicing use only identical Ryobi 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
shieldsduringpowertooloperationorwhenblowingdust.
If operation is dusty, also wear a dust mask.
WARNING:
Check extension cords before each use. If damaged
replaceimmediately.Neverusetoolwithadamagedcord
since touching the damaged area could cause electrical
shock resulting in serious injury.
CAUTION:
Keep extension cords away from the drilling area and
position the cord so that it will not get caught on lumber,
tools, etc., during drilling operation.
WARNING:
Donotusethisproductasacomponentofotherproducts.
Also, do not use attachments or accessories not
recommended for use with this product. Any such use
could result in possible serious personal injury.
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.

Page 13
NOTES

972000-401
8-97 Printed In U.S.A.
OWNER'S OPERATING MANUAL
1/2 in. (13 mm) Hammer Drill - HD500
DOUBLE INSULATED
• SERVICE
Nowthatyouhavepurchasedyourtool,shouldaneedeverexistforrepairpartsorservice,
simplycontactyournearestRyobiFactoryServiceCenterorAuthorizedServiceOrganization.
Be sure to provide all pertinent facts when you call or visit.
•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
HD500