Page 1
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)
Rating 120 volts, 60Hz, AC only, 5.5 Amperes
No Load Speed 0 - 1,000 & 0 - 3,000 RPM
Hammer Speed 0 - 48,000 BPM
Switch 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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TABLE OF CONTENTS
■ Product Specifications.......................................................................................................................1
■ Table Of Contents & Introduction......................................................................................................2
■ Rules For Safe Operation .................................................................................................................3
■ General Safety Rules.................................................................................................................... 3-4
■ Specific Safety Rules .................................................................................................................... 4-5
■ Symbols ............................................................................................................................................5
■ Electrical & Unpacking ......................................................................................................................6
■ Features............................................................................................................................................7
■ Operation .................................................................................................................................... 8-13
■ Maintenance....................................................................................................................................14
■ Parts Ordering / Service..................................................................................................................16
INTRODUCTION
DOUBLE INSULATION
Your Ryobi power tool is double insulated. This means you
are separated from the tool's electrical system by two complete
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.
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.
IMPORTANT
Servicing of a tool with double insulation requires extreme
care and knowledge of the system and should be performed
only by a qualified service technician. For service we suggest
you return the tool to your nearest RYOBI AUTHORIZED
SERVICE CENTER for repair. When servicing use only
identical Ryobi replacement parts.
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.
WARNING:
The operation of any power tool can result in foreign objects being thrown into your eyes, which
can result in severe eye damage. Before beginning 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.
Look for this symbol to point out important safety precautions.
It means attention!!! Your safety is involved.
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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: 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.
GENERAL SAFETY RULES
any way. Double insulation eliminates the need for
WARNING:
Read and understand all instructions. Failure to follow
all instructions listed below, may result in electric shock,
fire and/or serious personal injury.
SAVE THESE INSTRUCTIONS
Work Area
■ Keep your work area clean and well lit. Cluttered
benches and dark areas invite accidents.
■ Do not operate power tools in explosive atmospheres, such as in the presence of flammable
liquids, gases, or dust. Power tools create sparks which
may ignite the dust or fumes.
■ 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
install a polarized outlet. Do not change the plug in
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 electric 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 common sense when operating a power tool. Do not use
tool while tired or under the influence of drugs, alcohol, or medication. A moment of inattention while operat-
ing power tools may result in serious personal injury.
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GENERAL SAFETY RULES
■ Dress properly. Do not wear loose clothing or jew-
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 accidents.
■ 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, non-skid 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
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.
■ Do not force tool. Use the correct tool for your application. The correct tool will do the job better and safer at
the rate for which it is designed.
■ 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.
■ 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.
■ 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.
■ 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
■ T ool service must be performed only by qualified repair 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
follow Maintenance Instructions may create a risk of electric shock or injury.
SPECIFIC SAFETY RULES
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.
■ 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.
■ 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
moving parts, binding of moving parts, breakage of parts,
mounting, and any other conditions that may affect its
operation. A guard or other part that is damaged should
be properly repaired or replaced by an authorized service
center. Following this rule will reduce the risk of 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, petroleumbased products, or any strong solvents to clean your
tool.
■ Do not abuse cord. Never carry tool by cord or yank
it to disconnect from receptacle. Keep cord from
heat, oil and sharp edges. Following this rule will reduce
the risk of electric shock or fire.
■ Inspect for and remove all foreign objects from
workpiece before cutting. Following this rule will reduce
the risk of serious personal injury.
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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 exceeding 100 feet is not recommended. If in doubt, use the next
heavier gage. The smaller the gage number, the heavier
the cord. An undersized cord will cause a drop in line
voltage resulting in loss of power and overheating.
■ 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.
■ 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
WARNING:
Some dust created by power sanding, sawing, grinding,
drilling, and other construction activities contains
chemicals known to cause cancer, birth defects or
other reproductive harm. Some examples of these
chemicals are:
• lead from lead-based paints,
• crystalline silica from bricks and cement and other
masonry products, and
• arsenic and chromium from chemically-treated
lumber.
Your risk from these exposures varies, depending on
how often you do this type of work. To reduce your
exposure to these chemicals: work in a well ventilated
area, and work with approved safety equipment, such
as those dust masks that are specially designed to filter
out microscopic particles.
SYMBOLS
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 Current
Hz Hertz Frequency (cycles per second)
W Watt Power
min Minutes Time
Alternating Current Type or a characteristic of current
n
0
No Load Speed Strokes, at no load
Class II Construction
Designates Double Insulated
Construction tools
.../min
Revolutions or Reciprocation Per Minute
Safety Alert Symbol
Page 5
Revolutions, strokes, surface speed,
orbits etc. per minute
Indicates danger, warning or caution.
It means attention!!! Your safety is
involved.
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ELECTRICAL
EXTENSION CORDS
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.
Length of Extension Cord Wire Size (A.W.G.)
Up to 25 feet 16
26 to 50 feet 14
51 to 100 feet 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.
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.
ELECTRICAL CONNECTION
Your hammer drill has a precision built electric motor. It
should be connected to a power supply that is 120 volts,
60Hz, 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 over heat. If your tool
does not operate when plugged into an outlet, double-check
the power supply.
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.
PACKING LIST
Hammer Drill with Auxiliary Handle Assembly
Carrying Case
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.
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FEATURES
KNOW YOUR HAMMER DRILL
See Figure 1.
Before attempting to use your hammer drill, familiarize
yourself with all operating features and safety requirements.
WARNING:
Do not allow familiarity with your hammer drill to make you
careless. Remember that a careless fraction of second is
sufficient to inflict severe injury.
AUXILIARY
HANDLE ASSEMBLY
APPLICATIONS
(Use only for the purposes listed below)
■ Hammer drilling in concrete and masonry.
■ Drilling in wood.
■ Drilling in ceramics, plastics, fiberglass, and laminates.
■ Drilling in both hard and soft metals.
■ Using driving accessories, such as driving screws with
screwdriver bits.
■ Mixing paints.
MODE
SELECTOR
DEPTH
GAGE ROD
CHUCK
TWO-SPEED
GEAR SHIFT
KNOB
CHUCK KEY
SWITCH
TRIGGER
CHUCK KEY
STORAGE
LOCK-ON
BUTTON
VARIABLE SPEED
CONTROL SELECTOR
Fig. 1
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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
See Figure 2.
Your hammer drill is equipped with a "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.
If you have the "lock-on" feature engaged during use and
your drill becomes disconnected from power supply,
disengage the "lock-on" feature immediately.
LOCK-ON
BUTTON
SWITCH
TRIGGER
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 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.
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.
CAUTION:
Fig. 2
FORWARD
FORWARD-REVERSE
LEVER
REVERSE
Fig. 3
TO
REMOVE
TO
STORE
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
See Figure 4.
When not in use, the chuck key can be placed in the storage
on the cord.
CHUCK KEY
STORAGE
Fig. 4
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OPERATION
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 counterclockwise 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.
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.
Avoid running your hammer drill at low speeds for extended
periods of time. Running at low speeds under constant usage
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 punching, 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 accessories.
TO
INCREASE
SPEED
VARIABLE SPEED
CONTROL SELECTOR
TO
DECREASE
SPEED
Fig. 5
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 turning the handle counterclockwise.
■ Rotate auxiliary handle assembly to desired operating
position.
■ Securely tighten by turning the auxiliary handle
clockwise.
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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.
■ Adjust depth gage rod so that the drill bit extends beyond
the end of the rod to the required 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
desired hole depth has been reached when the end of the rod
comes in contact with the surface of the material being
drilled.
TO ADJUST DRILLING MODE
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.
TO DECREASE
DRILLING DEPTH
DRILLING
DEPTH
DRILL BIT
TO INCREASE
DRILLING DEPTH
TO LOOSEN
AUXILIARY
HANDLE
DEPTH
GAGE ROD
TO TIGHTEN
AUXILIARY
HANDLE
CAUTION:
Your hammer drill has not been designed for reverse
hammering. Failure to obey this warning may result in
property damage.
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. 6
PUSH RIGHT FOR
DRILLING MODE
MODE
SELECTOR
PUSH LEFT FOR
HAMMER MODE
Fig. 7
Page 10
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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.
DRILL BIT
TO INSTALL BITS
See Figure 8.
■ UNPLUG YOUR HAMMER DRILL.
WARNING:
Failure to unplug your hammer drill could result in
accidental starting causing serious injury.
■ Open or close the chuck jaws to a point where the opening
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.
TO REMOVE BITS
■ UNPLUG YOUR HAMMER DRILL.
CHUCK JAWS
RIGHT
WRONG
Fig. 8
Fig. 9
WARNING:
Failure to unplug your hammer drill could result in
accidental starting causing serious injury.
■ Loosen the chuck jaws using only the chuck key provided.
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
Page 12
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).
WARNING:
Failure to unplug your hammer drill could result in
accidental starting causing serious injury.
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.
W ARNING:
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.
HIGH
SPEED
1
2
LOW
SPEED
+
-
TWO-SPEED
2
1
GEAR SHIFT
KNOB
DRILLING
See Figure 10.
■ Depress and release the switch trigger to be sure your drill
is in OFF position before connecting it to power supply.
■ 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
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.
■ 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.
W ARNING:
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.
Fig. 10
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.
Page 12
Page 13
OPERATION
CHUCK REMOVAL
See Figures 11, 12, and 13.
Whenever necessary to remove the chuck for replacement,
use the following procedure for chuck removal:
■ UNPLUG YOUR HAMMER DRILL.
W ARNING:
Failure to unplug your hammer drill could result in
accidental starting causing serious injury.
MALLET
CHUCK
■ 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.
■ Tap the hex key sharply with a mallet in a clockwise
direction.
for removal.
■ Open the chuck jaws and remove hex key. Remove the
chuck screw by turning it in a clockwise direction.
Figure 12.
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 11.
See Figure 13.
This will loosen the chuck screw
See
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.
W ARNING:
CHUCK
JAWS
HEX KEY
Fig. 11
SCREWDRIVER
Fig. 12
Failure to unplug your hammer drill could result in
accidental starting causing serious injury.
■ Insert hex key into chuck and tighten chuck jaws securely.
Tap hex key sharply with a mallet in a clockwise direction.
This will tighten the chuck on the spindle.
■ Open the chuck jaws and remove hex key.
■ Tighten the chuck screw.
NOTE: The chuck screw has left hand threads.
Figure 12.
See Figure 11.
See
Page 13
HEX KEY
MALLET
CHUCK
CHUCK REMOVAL
Fig. 13
Page 14
MAINTENANCE
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 plastics are susceptible to damage from various types of commercial 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, petroleumbased products, penetrating oils, etc. come in contact
with plastic parts. They contain chemicals that can
damage, weaken, or destroy plastic.
EXTENSION CORDS
The use of any extension cord will cause some loss of power.
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.
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.
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:
Always wear safety goggles or safety glasses with side
shields during power tool operation or when blowing dust.
If operation is dusty, also wear a dust mask.
WARNING:
Check extension cords before each use. If damaged
replace immediately. Never use tool with a damaged cord
since touching the damaged area could cause electrical
shock resulting in serious injury.
WARNING:
Do not use this product as a component of other products.
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
normal operating conditions. Therefore, no further lubrication
is required.
Page 14
Page 15
NOTES
Page 15
Page 16
OWNER'S OPERATING MANUAL
1/ 2 in. (13 mm) Hammer Drill - HD501
DOUBLE INSULATED
EXTENSION CORD CAUTION
When using a power tool at a considerable distance from a power
source, be sure to use an extension cord that has the capacity to
handle the current the tool will draw. An undersized cord will cause
a drop in line voltage, resulting in overheating and loss of power.
Use the chart to determine the minimum wire size required in an
extension cord. Only round jacketed cords should be used.
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.
Before using any extension cord, inspect it for loose or exposed
wires and cut or worn insulation.
• 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.
**Ampere rating
(on tool data plate) 0-2.0 2.1-3.4 3.5-5.0 5.1-7.0 7.1-12.0 12.1-16.0
Cord Length Wire Size (A.W.G.)
25' 161616161414
50' 161616141412
100' 16 16 14 12 10 —
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.
**Used on 12 gauge - 20 amp circuit.
• 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 HD501
• SERIAL NUMBER
RYOBI TECHNOLOGIES, INC.
1428 Pearman Dairy Road Anderson SC 29625
Post Office Box 1207 Anderson SC 29622
Phone 1-800-525-2579
www.ryobitools.com
972000-947
10-01
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