OPERATOR'S MANUAL
HD501 - 1/2 in. (13 mm) Hammer Drill
DOUBLE INSULATED
SPECIFICATIONS:
Chuck Capacity
1/16 in. (1.5 mm) - 1/2 in. (13 mm)
120 volts, 60Hz, AC only, 5.5 Amperes
0 - 1,000 & 0 - 3,000 RPM
Rating
No Load Speed
Hammer Speed
Switch
0 - 48,000 BPM
Adjustable Variable Speed/Reversible
THANK YOU FOR BUYING A RYOBI HAMMER DRILL.
Your new hammer drill 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 operator'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.
Please fill out and return the Warranty Registration Card so we can be of future service to you.
Thank you again for buying Ryobi tools.
SAVE THIS MANUAL FOR FUTURE REFERENCE
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RULES FOR SAFE OPERATION
The purpose of safety symbols is to attract your attention to possible dangers. The safety symbols, and the
explanations with them, deserve your careful attention and understanding. The safety warnings do not by
themselves eliminate any danger. The instructions or warnings they give are not substitutes for proper
accident prevention measures.
SYMBOL
MEANING
SAFETY ALERT SYMBOL:
Indicates danger, warning, or caution. May be used in conjunction with other symbols or pictographs.
DANGER: Failure to obey a safety warning will result in serious injury to yourself or to others. Always
follow the safety precautions to reduce the risk of fire, electric shock and personal injury.
WARNING:Failuretoobeyasafetywarningcanresultinseriousinjurytoyourselfortoothers.Always
follow the safety precautions to reduce the risk of fire, electric shock and personal injury.
CAUTION: Failure to obey a safety warning may result in property damage or personal injury to
yourself or to others. Always follow the safety precautions to reduce the risk of fire, electric shock and
personal injury.
NOTE:
Advises you of information or instructions vital to the operation or maintenance of the equipment.
GENERAL SAFETY RULES
any way. Double insulation
eliminates the need for
the three wire grounded power cord and grounded power
supply system.
WARNING:
Read and understand all instructions. Failure to follow
all instructions listed below, may result in electric shock,
fire and/or serious personal injury.
■ 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.
SAVE THESE INSTRUCTIONS
Work Area
■ Keep your work area clean and well lit. Cluttered
benches and dark areas invite accidents.
■ 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.
■ Do not operate power tools in explosive atmo-
spheres, such as in the presence of flammable
liquids, gases, or dust. Power tools create sparks which
may ignite the dust or fumes.
■ 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.
■ Keep bystanders, children, and visitors away while
operating a power tool. Distractions can cause you to
lose control.
Personal Safety
Electrical 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.
■ 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
Page 3
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GENERAL SAFETY RULES
■ Dress properly. Do not wear loose clothing or jew-
■ Disconnect the plug from the power source before
making any adjustments, changing accessories, or
storing the tool. Such preventive safety measures
reduce risk of starting the tool accidentally.
elry. 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.
■ 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.
■ 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 maintained tools with sharp cutting edges
are less likely to bind and are easier to control.
■ 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.
■ 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.
■ 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, non-skid safety shoes, hard hat, or hearing
protection must be used for appropriate conditions.
■ 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.
Tool Use and Care
■ 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.
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.
■ 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.
■ 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
follow Maintenance Instructions may create a risk of elec-
tric shock or injury.
■ 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.
SPECIFIC SAFETY RULES
■ 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
beproperlyrepairedorreplacedbyanauthorizedservice
center. Following this rule will reduce the risk of electric
shock, fire, or serious injury.
Specific Safety Rules for Hammer Drills
■ 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.
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.
■ Keep the tool and its handle 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.
■ Always wear safety glasses with side shields. Every-
day eyeglasses have only impact resistant lenses; they
are NOT safety glasses.
■ 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.
■ 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.
■ Inspect for and remove all foreign objects from
workpiecebeforecutting.Followingthisrulewill reduce
the risk of serious personal injury.
■ Inspect tool cords periodically and if damaged, have
repaired at your nearest authorized service center. Stay
constantly aware of cord location.
Page 4
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SPECIFIC SAFETY RULES
■ 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 100 feet or less in length. A cord exceed-
ing 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.
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.
■ 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.
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.
■ Keep hands away from drilling area. Following this rule
will reduce the risk of serious personal injury.
■ 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.
SAVE THESE INSTRUCTIONS
SYMBOLS
Important: Some of the following symbols may be used on your tool. Please study them and learn their meaning. Proper
interpretation of these symbols will allow you to operate the tool better and safer.
SYMBOL
NAME
DESIGNATION/EXPLANATION
V
Volts
Voltage
A
Amperes
Hertz
Current
Hz
W
Frequency (cycles per second)
Watt
Power
Time
min
Minutes
Alternating Current
No Load Speed
Type or a characteristic of current
Strokes, at no load
n
0
Designates Double Insulated
Construction tools
Class II Construction
Revolutions, strokes, surface speed,
orbits etc. per minute
.../min
Revolutions or Reciprocation Per Minute
Indicates danger, warning or caution.
It means attention!!! Your safety is
involved.
Safety Alert Symbol
Page 5
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ELECTRICAL
EXTENSION CORDS
ELECTRICAL CONNECTION
When using a power tool at a considerable distance from the
power source, use an extension cord heavy enough to carry
the current that the tool will draw. An undersized extension
cord will cause a drop in line voltage, resulting in a loss of
power and causing the motor to overheat. Use the chart
provided below to determine the minimum wire size required
in an extension cord. Only round jacketed cords listed by
Underwriter's Laboratories (UL) should be used.
Your hammer drill has a precision built electric motor. It
should be connected to a power supply that is 120 volts,
60Hz,AConly(normalhouseholdcurrent).Donotoperate
this tool on direct current (DC). A substantial voltage drop will
cause a loss of power and the motor will over heat. If your tool
does not operate when plugged into an outlet, double-check
the power supply.
Length of Extension Cord
Wire Size (A.W.G.)
CAUTION:
Keep the cord away from the work area and position the
cord so that it may not get caught on materials or other
objects during drilling.
Up to 25 feet
26 to 50 feet
51 to 100 feet
16
14
12
When working with the tool outdoors, use an extension cord
that is designed for outside use. This is indicated by the
letters WA on the cord's jacket.
Before using an extension cord, inspect it for loose or
exposed wires and cut or worn insulation.
UNPACKING
Your hammer drill has been shipped completely assembled
and ready for use. Inspect it carefully to make sure no
breakage or damage has occurred during shipping.
PACKING LIST
Hammer Drill with Auxiliary Handle Assembly
Carrying Case
If any parts are damaged or missing, call 1-800-525-2579 to
obtain replacement parts before attempting to operate tool.
An operator's manual and warranty registration are also
included.
Operator's Manual
Warranty Registration Card
WARNING:
If any parts are missing do not operate your hammer drill
until the missing parts are replaced. Failure to do so could
result in possible serious injury.
Page 6
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FEATURES
KNOW YOUR HAMMER DRILL
APPLICATIONS
See Figure 1.
(Use only for the purposes listed below)
■ Hammer drilling in concrete and masonry.
■ Drilling in wood.
Before attempting to use your hammer drill, familiarize
yourself with all operating features and safety requirements.
■ Drilling in ceramics, plastics, fiberglass, and laminates.
■ Drilling in both hard and soft metals.
WARNING:
Donotallowfamiliaritywithyourhammerdrilltomakeyou
careless. Remember that a careless fraction of second is
sufficient to inflict severe injury.
■ Using driving accessories, such as driving screws with
screwdriver bits.
■ Mixing paints.
AUXILIARY
HANDLE ASSEMBLY
MODE
SELECTOR
DEPTH
GAGE ROD
LOCK-ON
BUTTON
TWO-SPEED
GEAR SHIFT
CHUCK
VARIABLE SPEED
CONTROL SELECTOR
KNOB
SWITCH
TRIGGER
CHUCK KEY
CHUCK KEY
STORAGE
Fig. 1
Page 7
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OPERATION
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
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,
push in and hold the lock-on button located on the side of the
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.
SWITCH
TRIGGER
If you have the "lock-on" feature engaged during use and
your drill becomes disconnected from power supply,
disengage the "lock-on" feature immediately.
Fig. 2
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.
FORWARD
FORWARD-REVERSE
LEVER
REVERSIBLE
See Figure 3.
Your hammer drill has the feature of being reversible in the
drill mode. 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 direction of rotation is reversed when the
lever is to the right of the switch.
REVERSE
Thedesignoftheswitchwillnotpermitchangingthedirection
of rotation while the drill is running. Release the switch
triggerandallowthedrilltostopbeforechangingitsdirection.
Fig. 3
NOTE: Your hammer drill will not run unless switch lever is
pushed fully to the left or right.
TO
REMOVE
TO
STORE
CAUTION:
Your hammer drill has not been designed for reverse
hammering. Failure to obey this warning may result in
property damage.
CHUCK KEY
See Figure 4.
A chuck key has been provided for use when installing or
removing bits. It is also used when removing the chuck. (See
chuck removal section).
CHUCK KEY STORAGE
CHUCK KEY
STORAGE
See Figure 4.
When not in use, the chuck key can be placed in the storage
on the cord.
Fig. 4
Page 8
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OPERATION
VARIABLE SPEED
VARIABLE SPEED
CONTROL SELECTOR
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 counterclock-
wise to increase the speed and torque of your hammer drill.
Turn clockwise 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.
TO
DECREASE
SPEED
TO
INCREASE
SPEED
NOTE: If the variable speed control selector is fully turned in
the clockwise direction (zero setting) your drill may not run. If
you desire not to use the variable speed control selector, turn
it in the full counterclockwise direction. This will allow the
speed of your drill to be fully controlled by the amount of
switch trigger depression.
Fig. 5
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, and copper, and when using driving acces-
sories.
AUXILIARY HANDLE ASSEMBLY
See Figure 6.
An auxiliary handle assembly has been installed on your
hammer drill. For ease of operation, this auxiliary handle
assembly may be used in either the left-hand or right-hand
position.
■ To adjust, loosen the auxiliary handle assembly by turn-
ing the handle counterclockwise.
■ Rotate auxiliary handle assembly to desired operating
position.
■ Securely tighten by turning the auxiliary handle
clockwise.
Page 9
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OPERATION
USING DEPTH GAGE ROD
See Figure 6.
A depth gage rod has been installed on your hammer drill to
assist you in controlling the depth of drilled holes.
TO DECREASE
DRILLING DEPTH
DEPTH
GAGE ROD
■ Adjust depth gage rod so that the drill bit extends beyond
TO INCREASE
the end of the rod to the required drilling depth.
DRILLING DEPTH
DRILLING
DEPTH
■ Securely tighten auxiliary handle. This secures depth
gage rod at desired depth of cut. It also secures auxiliary
handle assembly.
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
TO LOOSEN
AUXILIARY
HANDLE
See Figure 7.
To adjust for type of drilling, slide mode selector on top of
motor housing left to hammer mode or right to drilling mode.
For your convenience a hammer symbol and drill bit symbol
have been molded into motor housing.
DRILL BIT
TO TIGHTEN
AUXILIARY
HANDLE
CAUTION:
Fig. 6
Your hammer drill has not been designed for reverse
hammering. Failure to obey this warning may result in
property damage.
PUSH RIGHT FOR
DRILLING MODE
MODE
SELECTOR
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.
PUSH LEFT FOR
HAMMER MODE
Fig. 7
Page 10
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OPERATION
WARNING:
DRILL BIT
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 8.
CHUCK JAWS
■ UNPLUG YOUR HAMMER DRILL.
WARNING:
Failure to unplug your hammer drill could result in
accidental starting causing serious injury.
RIGHT
Fig. 8
■ Openorclosethechuckjawstoapointwheretheopening
is slightly larger than the drill bit you intend to use. Also,
raise the front of your drill slightly to keep the drill bits from
falling out of the chuck jaws.
■ 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 9. This could cause drill bit to be thrown from your drill
resulting in possible serious personal injury or damage to your
chuck.
■ 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.
■ Remove chuck key and return to storage area.
WRONG
Fig. 9
TO REMOVE BITS
■ UNPLUG YOUR HAMMER DRILL.
WARNING:
Failure to unplug your hammer drill could result in
accidental starting causing serious injury.
■ Loosenthechuckjawsusingonlythechuckkeyprovided.
Do not use a wrench to tighten or loosen the chuck
jaws.
■ Remove drill bit from chuck jaws.
■ Remove chuck key and return to storage area.
Page 11
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OPERATION
TWO-SPEED GEAR SHIFT KNOB
See Figure 10.
The hammer drill has a two-speed gear shift knob which
provides a high speed of approximately 3,000 RPM and a
low speed of approximately 1,000 RPM (stated speeds are
with the trigger switch in "Full-On" position).
1
2
+
WARNING:
Failure to unplug your hammer drill could result in
accidental starting causing serious injury.
HIGH
SPEED
LOW
SPEED
TWO-SPEED
GEAR SHIFT
KNOB
For high speed operation, rotate two-speed gear shift knob
clockwise aligning "2" with indicating mark on knob. For low
speed operation, rotate knob counterclockwise aligning "1"
with the indicating mark on knob. It may be necessary to
rotate the chuck by hand while rotating knob.
DO NOT SHIFT SPEEDS WHILE TOOL IS RUNNING.
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
thrown into your eyes, resulting in possible serious injury.
DRILLING
See Figure 10.
■ Depressandreleasetheswitchtriggertobesureyourdrill
is in OFF position before connecting it to power supply.
Fig. 10
■ Check the direction of rotation lever for correct setting
(forward or reverse). See Figure 3, Page 8.
■ Secure the material to be drilled in a vise or with clamps
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.
to keep it from turning as the drill bit rotates.
■ Plug your hammer drill into power supply source.
■ Hold your drill firmly and place the bit at the point to be
drilled.
■ 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.
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.
■ Move the drill bit into the workpiece applying only enough
pressure to keep the bit cutting. Do not force your drill or
apply side pressure to elongate a hole. Let your drill and
bit do the work. See Figure 10.
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.
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
when breaking through material. If not prepared, this loss
of control can result in possible serious injury.
Page 12
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OPERATION
CHUCK REMOVAL
See Figures 11, 12, and 13.
MALLET
Whenever necessary to remove the chuck for replacement,
use the following procedure for chuck removal:
CHUCK
■ UNPLUG YOUR HAMMER DRILL.
WARNING:
Failure to unplug your hammer drill could result in
accidental starting causing serious injury.
■ Open chuck jaws. Insert a 5/16 in. (8 mm) or larger hex
key into the chuck of your drill and tighten the chuck jaws
securely.
CHUCK
JAWS
■ Tap the hex key sharply with a mallet in a clockwise
direction. See Figure 11. This will loosen the chuck screw
for removal.
HEX KEY
■ Open the chuck jaws and remove hex key. Remove the
chuck screw by turning it in a clockwise direction. See
Figure 12.
Fig. 11
NOTE: The chuck screw has left hand threads.
■ Insert hex key in chuck and tighten chuck jaws securely.
Tap sharply with a mallet in a counterclockwise direction.
This will loosen the chuck on the spindle. It can now be
unscrewed by hand. See Figure 13.
SCREWDRIVER
TO RETIGHTEN A LOOSE CHUCK
The chuck may at times become loose on the spindle and
develop a wobble. Also, the chuck screw may become loose
causing the chuck jaws to bind and prevent them from
closing. To tighten, follow these steps:
■ UNPLUG YOUR HAMMER DRILL.
Fig. 12
WARNING:
Failure to unplug your hammer drill could result in
accidental starting causing serious injury.
MALLET
■ Inserthexkeyintochuckandtightenchuckjawssecurely.
Tap hex key sharply with a mallet in a clockwise direction.
This will tighten the chuck on the spindle. See Figure 11.
■ Open the chuck jaws and remove hex key.
CHUCK
■ Tighten the chuck screw.
NOTE: The chuck screw has left hand threads. See
Figure 12.
HEX KEY
CHUCK REMOVAL
Fig. 13
Page 13
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MAINTENANCE
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
this tool be used for extended work on any fiberglass material,
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.
WARNING:
When servicing use only identical Ryobi replacement
parts. Use of any other parts may create a hazard or
cause product damage.
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:
Always wear safety goggles or safety glasses with side
shieldsduringpowertooloperationorwhenblowingdust.
If operation is dusty, also wear a dust mask.
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.
WARNING:
Check extension cords before each use. If damaged
replaceimmediately. Neverusetoolwithadamagedcord
since touching the damaged area could cause electrical
shock resulting in serious injury.
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.
A wire 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.
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.
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.
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 14
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NOTES
Page 15
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OWNER'S OPERATING MANUAL
1/2 in. (13 mm) Hammer Drill - HD501
DOUBLE INSULATED
**Ampere rating
(on tool data plate) 0-2.0
EXTENSION CORD CAUTION
2.1-3.4 3.5-5.0 5.1-7.0 7.1-12.0 12.1-16.0
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
handlethecurrentthetoolwilldraw. Anundersizedcordwillcause
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 should be used.
Cord Length
Wire Size (A.W.G.)
25'
50'
16
16
16
16
16
16
16
16
14
16
14
12
14
14
10
14
12
—
100'
When working with a tool outdoors, use an extension cord that is
designed for outside use. This is indicated by the letters "WA" on
the cord's jacket.
CAUTION: Keep the extension cord clear of the working
area. Position the cord so that it will not get caught on workpiece,
tools, or other obstructions while you are working with a power
tool.
Before using any extension cord, inspect it for loose or exposed
wires and cut or worn insulation.
**Used on 12 gauge - 20 amp circuit.
• SERVICE
Now that you have purchased your tool, should a need ever exist for repair parts or service,
simply contact your nearest Ryobi Authorized Service Center. Be sure to provide all
pertinent facts when you call or visit. Please call 1-800-525-2579 for your nearest Ryobi
complete list of Authorized Service Centers.
• MODEL NO.
The model number of your 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.
•
•
MODEL NUMBER
SERIAL NUMBER
HD501
RYOBI TECHNOLOGIES, INC.
1428 Pearman Dairy Road Anderson SC 29625
Post Office Box 1207
Anderson SC 29622
Phone 1-800-525-2579
972000-947
10-01
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