Ryobi Drill D46C User Guide

OPERATOR’S MANUAL  
3/8 in. DRILL  
DOUBLE INSULATED  
D46C  
Your drill has been engineered and manufactured to our high standard for dependability, ease of operation, and operator  
safety. When properly cared for, it will give you years of rugged, trouble-free performance.  
WARNING: To reduce the risk of injury, the user must read and understand the operator's manual before using  
this product.  
Thank you for your purchase.  
SAVE THIS MANUAL FOR FUTURE REFERENCE  
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GENERAL SAFETY RULES  
Avoid accidental starting. Be sure switch is off  
WARNING:  
before plugging in. Carrying tools with your finger on  
the switch or plugging in tools that have the switch on  
invites accidents.  
Read and understand all instructions. Failure to follow  
all instructions listed below, may result in electric shock,  
fire and/or serious personal injury.  
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.  
SAVE THESE INSTRUCTIONS  
WORK AREA  
Do not overreach. Keep proper footing and balance  
at all times. Proper footing and balance enables better  
control of the tool in unexpected situations.  
Use safety equipment. Always wear eye protection.  
Dust mask, nonskid safety shoes, hard hat, or hearing  
protection must be used for appropriate conditions.  
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, Do not wear loose clothing or jewelry. Contain long  
or dust. Power tools create sparks which may ignite the  
dust or fumes.  
hair. Loose clothes, jewelry, or long hair can be drawn  
into air vents.  
Do not use on a ladder or unstable support. Stable  
footing on a solid surface enables better control of the  
tool in unexpected situations.  
Keep bystanders, children, and visitors away while  
operating a power tool. Distractions can cause you to  
lose control.  
TOOL USE AND CARE  
ELECTRICAL SAFETY  
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 appli-  
cation. The correct tool will do the job better and safer  
at the rate for which it is designed.  
Double insulated tools are equipped with a polarized  
plug (one blade is wider than the other). This plug will  
fit in a polarized outlet only one way. If the plug does  
not fit fully in the outlet, reverse the plug. If it still  
does not fit, contact a qualified electrician to install a  
polarized outlet. Do not change the plug in any way.  
Double insulation  
eliminates the need for the three-  
wire grounded power cord and grounded power supply  
system.  
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 power source before making  
any adjustments, changing accessories, or storing the  
tool. Such preventive safety measures reduce the risk of  
starting the tool accidentally.  
Store idle tools out of the 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.  
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.  
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.  
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  
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.  
Keep the tool and its handle dry, clean and free from  
oil and grease. Always use a clean cloth when clean-  
ing. Never use brake fluids, gasoline, petroleum-based  
products, or any strong solvents to clean your tool.  
Following this rule will reduce the risk of loss of con-  
trol and deterioration of the enclosure plastic.  
Stay alert, watch what you are doing and use common  
sense when operating a power tool. Do not use tool  
while tired or under the influence of drugs, alcohol,  
or medication. A moment of inattention while operating  
power tools may result in serious personal injury.  
Dress properly. Do not wear loose clothing or jewelry.  
Contain long hair. Keep your hair, clothing, and gloves  
away from moving parts. Loose clothes, jewelry, or long  
hair can be caught in moving parts.  
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GENERAL SAFETY RULES  
When servicing a tool, use only identical replacement  
SERVICE  
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  
shock or injury.  
Tool service must be performed only by qualified  
repair personnel. Service or maintenance performed by  
unqualified personnel may result in a risk of injury.  
SPECIFIC SAFETY RULES  
Hold tool by insulated gripping surfaces when Check damaged parts. Before further use of the  
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 cutting  
tool “live” and shock the operator.  
tool, a guard or other part that is damaged should  
be carefully checked to determine that it will operate  
properly and perform its intended function. Check for  
alignment of moving parts, binding of moving parts,  
breakage of parts, mounting, and any other conditions  
that may affect its operation. A guard or other part that  
is damaged should be properly repaired or replaced  
by an authorized service center. Following this rule will  
reduce the risk of shock, fire, or serious injury.  
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.  
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 gauge size (A.W.G.) of at least 16 is  
recommended for an extension cord 50 feet or less  
in length. A cord exceeding 100 feet is not recom-  
mended. If in doubt, use the next heavier gauge. The  
smaller the gauge number, the heavier the cord. An  
undersized cord will cause a drop in line voltage resulting  
in loss of power and overheating.  
Always wear safety glasses. Everyday eyeglasses  
have only impact-resistant lenses; they are NOT  
safety glasses. Following this rule will reduce the risk  
of serious personal injury.  
Protect your lungs. Wear a face or dust mask if the  
operation is dusty. Following this rule will reduce the  
risk of serious personal injury.  
Protect your hearing. Wear hearing protection during  
extended periods of operation. Following this rule will  
reduce the risk of serious personal injury.  
Inspect for and remove all nails from lumber before  
using this tool. Following this rule will reduce the risk of  
serious personal injury.  
Inspect tool cords periodically and, if damaged, have  
repaired at your nearest Authorized Service Center.  
Constantly stay aware of cord location. Following this  
rule will reduce the risk of electric shock or fire.  
Save these instructions. Refer to them frequently and  
use them to instruct others who may use this tool. If you  
loan someone this tool, loan them these instructions  
also.  
WARNING:  
Some dust created by power sanding, sawing, grinding, drilling, and other construction activities contains chemicals  
known to cause cancer, birth defects or other reproductive harm. Some examples of these chemicals are:  
• lead from lead-based paints,  
• crystalline silica from bricks and cement and other masonry products, and  
• arsenic and chromium from chemically-treated lumber.  
Your risk from these exposures varies, depending on how often you do this type of work. To reduce your exposure to  
these chemicals: work in a well ventilated area, and work with approved safety equipment, such as those dust masks  
that are specially designed to filter out microscopic particles.  
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SYMBOLS  
Someofthefollowingsymbolsmaybeusedonthistool. Pleasestudythemandlearntheirmeaning. Properinterpretation  
of these symbols will allow you to operate the tool better and safer.  
SYMBOL  
NAME  
DESIGNATION/EXPLANATION  
V
Volts  
Voltage  
Current  
A
Hz  
W
Amperes  
Hertz  
Frequency (cycles per second)  
Power  
Watt  
min  
Minutes  
Time  
Alternating Current  
Direct Current  
Type of current  
Type or a characteristic of current  
Rotational speed, at no load  
Double-insulated construction  
Revolutions, strokes, surface speed, orbits etc., per minute  
n
o
No Load Speed  
Class II Construction  
Per Minute  
.../min  
Wet Conditions Alert  
Do not expose to rain or use in damp locations.  
To reduce the risk of injury, user must read and understand  
operator’s manual before using this product.  
Read The Operator’s Manual  
Always wear safety goggles or safety glasses with side shields and,  
as necessary, a full face shield when operating this product.  
Eye Protection  
Safety Alert  
Precautions that involve your safety.  
Failure to keep your hands away from the blade will result in serious  
personal injury.  
No Hands Symbol  
Failure to keep your hands away from the blade will result in serious  
personal injury.  
No Hands Symbol  
No Hands Symbol  
No Hands Symbol  
Failure to keep your hands away from the blade will result in serious  
personal injury.  
Failure to keep your hands away from the blade will result in serious  
personal injury.  
To reduce the risk of injury or damage, avoid contact with any hot  
surface.  
Hot Surface  
5
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SYMBOLS  
The following signal words and meanings are intended to explain the levels of risk associated with this product.  
SYMBOL  
SIGNAL  
MEANING  
Indicates an imminently hazardous situation, which, if not avoided, will result  
in death or serious injury.  
DANGER:  
Indicates a potentially hazardous situation, which, if not avoided, could result  
in death or serious injury.  
WARNING:  
CAUTION  
CAUTION  
Indicates a potentially hazardous situation, which, if not avoided, may result in  
minor or moderate injury.  
(Without Safety Alert Symbol) Indicates a situation that may result in property  
damage.  
SERVICE  
WARNING:  
Servicing requires extreme care and knowledge and should  
be performed only by a qualified service technician. For  
service we suggest you return the product to the nearest  
AUTHORIZED SERVICE CENTER for repair. When servic-  
ing, use only identical replacement parts.  
To avoid serious personal injury, do not attempt to use this  
product until you read thoroughly and understand com-  
pletely the operator’s manual. If you do not understand  
the warnings and instructions in the operator’s manual,  
do not use this product. Call Ryobi customer service for  
assistance.  
WARNING:  
The operation of any power tool can result in foreign objects being thrown into your eyes, which can  
result in severe eye damage. Before beginning power tool operation, always wear safety goggles or  
safety glasses with side shields and, when needed, a full face shield. We recommend Wide Vision  
Safety Mask for use over eyeglasses or standard safety glasses with side shields. Always use eye  
protection which is marked to comply with ANSI Z87.1.  
SAVE THESE INSTRUCTIONS  
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ELECTRICAL  
DOUBLE INSULATION  
EXTENSION CORDS  
Double insulation is a concept in safety in electric power  
tools, which eliminates the need for the usual three-  
wire grounded power cord. All exposed metal parts are  
isolated from the internal metal motor components with  
protecting insulation. Double insulated tools do not need  
to be grounded.  
When using a power tool at a considerable distance from  
a power source, be sure to use an extension cord that has  
the capacity to handle the current the tool will draw. An  
undersized cord will cause a drop in line voltage, resulting in  
overheating and loss of power. Use the chart to determine  
the minimum wire size required in an extension cord. Only  
round jacketed cords listed by Underwriter’s Laboratories  
(UL) should be used.  
WARNING:  
When working outdoors with a tool, use an extension cord  
that is designed for outside use. This type of cord is desig-  
nated with “WA” on the cord’s jacket.  
The double insulated system is intended to protect  
the user from shock resulting from a break in the tool’s  
internal insulation. Observe all normal safety precautions  
to avoid electrical shock.  
Before using any extension cord, inspect it for loose or  
exposed wires and cut or worn insulation.  
NOTE: Servicing of a tool with double insulation requires  
extreme care and knowledge of the system and should be  
performedonlybyaqualifiedservicetechnician. Forservice,  
we suggest you return the tool to your nearest authorized  
service center for repair. Always use original factory replace-  
ment parts when servicing.  
**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'  
50'  
16  
16  
16  
16  
16  
16  
16  
16  
14  
16  
14  
12  
14  
14  
10  
14  
12  
ELECTRICAL CONNECTION  
100'  
This tool has a precision-built electric motor. It should be  
connected to a power supply that is 120 volts, 60 Hz, AC  
only (normal household current). Do not operate this tool  
on direct current (DC). A substantial voltage drop will cause  
a loss of power and the motor will overheat. If the tool does  
not operate when plugged into an outlet, double-check the  
power supply.  
**Used on 12 gauge - 20 amp circuit.  
NOTE: AWG = American Wire Gauge  
WARNING:  
Keep the extension cord clear of the working area.  
Position the cord so that it will not get caught on lumber,  
tools or other obstructions while you are working with a  
power tool. Failure to do so can result in serious personal  
injury.  
WARNING:  
Check extension cords before each use. If damaged  
replace immediately. Never use tool with a damaged cord  
since touching the damaged area could cause electrical  
shock resulting in serious injury.  
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FEATURES  
PRODUCT SPECIFICATIONS  
Chuck.......................................................................3/8 in.  
Switch.............................Variable Speed Reversible (VSR)  
Clutch............................................................. 24 Positions  
No Load Speed ..............................................0-1,000/min.  
Input ............................... 120 V, 60 Hz, AC only, 4.5 Amps  
Net Weight.............................................................. 3.8 lbs.  
BIT STORAGE  
TORQUE  
ADJUSTMENT RING  
DIRECTION OF  
ROTATION SELECTOR  
(FORWARD/REVERSE)  
KEYLESS  
CHUCK  
LOCK-ON  
BUTTON  
SWITCH  
TRIGGER  
Fig. 1  
KNOW YOUR DRILL  
KEYLESS CHUCK  
See Figure 1.  
The keyless chuck allows you to hand-tighten or release  
the drill bit in the chuck jaws.  
The safe use of this product requires an understanding of  
the information on the tool and in this operator’s manual as  
well as a knowledge of the project you are attempting. Before  
use of this product, familiarize yourself with all operating  
features and safety rules.  
LOCK-ON BUTTON  
The lock-on button is convenient for continuous drilling for  
extended periods of time.  
TORQUE ADJUSTMENT RING  
Your drill has a 24-position clutch. The torque adjustment  
ring can be turned to select the right amount of torque for  
your application.  
BIT STORAGE  
Bits provided with the drill can be placed in the storage  
area, located on the top of the drill.  
DIRECTION OF ROTATION SELECTOR  
VARIABLE SPEED  
The variable speed switch trigger delivers higher speed  
with increased trigger pressure and lower speed with  
decreased trigger pressure.  
(FORWARD/REVERSE)  
Your drill has a direction of rotation (forward/reverse) selector  
located above the switch trigger for changing the direction  
of bit rotation.  
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ASSEMBLY  
UNPACKING  
This product has been shipped completely assembled.  
WARNING:  
If any parts are damaged or missing do not operate  
this tool until the parts are replaced. Failure to heed this  
warning could result in serious personal injury.  
Carefully remove the tool and any accessories from the  
box. Make sure that all items listed in the packing list are  
included.  
Inspect the tool carefully to make sure no breakage or  
damage occurred during shipping.  
WARNING:  
Do not discard the packing material until you have care-  
Do not attempt to modify this tool or create accesso-  
ries not recommended for use with this tool. Any such  
alteration or modification is misuse and could result in a  
hazardous condition leading to possible serious personal  
injury.  
fully inspected and satisfactorily operated the tool.  
If any parts are damaged or missing, please call  
1-800-525-2579 for assistance.  
PACKING LIST  
Drill  
Double Ended Bits (2)  
Operator’s Manual  
Case  
WARNING:  
Do not connect to power supply until assembly is  
complete. Failure to comply could result in accidental  
starting and possible serious personal injury.  
OPERATION  
SWITCH TRIGGER  
See Figure 2.  
WARNING:  
Do not allow familiarity with tools to make you care-  
less. Remember that a careless fraction of a second is  
sufficient to inflict serious injury.  
To turn the drill ON, depress the switch trigger. To turn it  
OFF, release the switch trigger.  
VARIABLE SPEED  
The variable speed switch delivers higher speed and torque  
with increased trigger pressure and lower speed with  
decreased trigger pressure.  
WARNING:  
Always wear safety goggles or safety glasses with side  
shields when operating power tools. Failure to do so  
could result in objects being thrown into your eyes  
resulting in possible serious injury.  
NOTE: You might hear a whistling or ringing noise  
from the switch during use. Do not be concerned;  
this is a normal part of the switch function.  
DIRECTION OF  
ROTATION SELECTOR  
FORWARD/REVERSE  
WARNING:  
REVERSE  
LOCK-ON  
BUTTON  
Do not use any attachments or accessories not  
recommended by the manufacturer of this tool. The use  
of attachments or accessories not recommended can  
result in serious personal injury.  
APPLICATIONS  
You may use this tool for the purposes listed below:  
Drilling in wood  
Drilling in ceramics, plastics, fiberglass, and laminates  
Drilling in metals  
FORWARD  
SWITCH TRIGGER  
Mixing paint  
Fig. 2  
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OPERATION  
DIRECTION OF ROTATION SELECTOR  
(FORWARD/REVERSE)  
See Figure 2.  
UNLOCK  
(RELEASE)  
CHUCK BODY  
The direction of bit rotation is reversible and is controlled  
by a selector located above the switch trigger. With the drill  
held in normal operating position, the direction of rotation  
selector should be positioned to the left of the switch trigger  
for drilling. The drilling direction is reversed when the selector  
is to the right of the switch trigger.  
CHUCK  
JAWS  
CAUTION:  
To prevent gear damage, always allow the chuck to  
come to a complete stop before changing the direction  
of rotation.  
LOCK  
(TIGHTEN)  
CHUCK  
COLLAR  
To stop the drill, release the switch trigger and allow the  
chuck to come to a complete stop.  
Fig. 3  
NOTE: The drill will not run unless the direction of rotation  
selector is pushed fully to the left or right.  
BIT STORAGE  
Avoid running the drill at low speeds for extended periods  
of time. Running at low speeds under constant usage may  
cause the drill to become overheated. If this occurs, cool the  
drill by running it without a load and at full speed.  
KEYLESS CHUCK  
See Figure 3.  
The drill has a keyless chuck that makes it simple to  
tighten or release drill bits in the chuck jaws. Grasp and  
hold the collar of the chuck with one hand. Rotate the chuck  
body with your other hand. The arrows on the chuck indicate  
which direction to rotate the chuck body in order to LOCK  
(tighten) or UNLOCK (release) the drill bit.  
WARNING:  
Do not hold the chuck body with one hand and use the  
power of the drill to tighten the chuck jaws on the drill  
bit. The chuck body could slip in your hand, or your hand  
could slip and come in contact with the rotating drill bit.  
This could cause an accident resulting in serious personal  
injury.  
Fig. 4  
BIT STORAGE  
See Figure 4.  
When not in use, bits provided with the drill can be placed  
in the storage area located on the top of the drill.  
WARNING:  
Always unplug the tool when installing or remov-  
ing bits, adjusting settings, or when the tool is  
not in use. Failure to unplug the tool may result  
in accidental starting and serious personal injury.  
10  
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OPERATION  
INSTALLING BITS  
UNLOCK  
(RELEASE)  
See Figure 5 - 6.  
CHUCK  
JAWS  
CHUCK BODY  
Unplug the drill.  
Open or close the chuck jaws to a point where the open-  
ing is slightly larger than the bit size you intend to use.  
Also, raise the front of the drill slightly to keep the bit from  
falling out of the chuck jaws.  
Insert the drill bit.  
DRILL BIT  
WARNING:  
Make sure to insert the drill bit straight into the chuck  
jaws. Do not insert the drill bit into the chuck jaws at  
an angle then tighten, as shown infigure 6. This could  
cause the drill bit to be thrown from the drill, resulting in  
possible serious personal injury or damage to the  
chuck.  
LOCK  
(TIGHTEN)  
CHUCK  
COLLAR  
Fig. 5  
RIGHT  
Tighten the chuck jaws securely on the bit.  
NOTE: Rotate the chuck body in the direction of the ar-  
row marked LOCK to close the chuck jaws. Do not use  
a wrench to tighten or loosen the chuck jaws.  
REMOVING BITS  
See Figure 5.  
Unplug the drill.  
Open the chuck jaws.  
NOTE: Rotate the chuck body in the direction of the arrow  
marked UNLOCK to open the chuck jaws. Do not use a  
wrench to tighten or loosen the chuck jaws.  
Remove the drill bit.  
LOCK-ON BUTTON  
See Figure 7.  
WRONG  
This drill is equipped with a lock-on feature, which is  
convenient for continuous drilling for extended periods of  
time. To lock-on:  
Fig. 6  
Depress the switch trigger.  
DIRECTION OF  
ROTATION SELECTOR  
(FORWARD/REVERSE)  
Push in and hold the lock-on button, located on the side  
LOCK-ON  
BUTTON  
of the handle.  
Release the switch trigger.  
Release the lock-on button and the drill will continue  
running.  
To release the lock, depress and release the switch trigger.  
If the lock-on feature is engaged during use and the drill  
becomes disconnected from the power supply, disengage  
the lock-on feature immediately.  
SWITCH  
TRIGGER  
Fig. 7  
11  
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OPERATION  
ADJUSTABLE TORQUE CLUTCH  
TORQUE  
ADJUSTMENT RING  
TO DECREASE  
TORQUE  
See Figure 8.  
This product is equipped with an adjustable torque  
clutch for driving different types of screws into different  
materials.Thepropersettingdependsonthetypeofmaterial  
and the size of screw you are using.  
ADJUSTING TORQUE  
See Figure 8.  
There are twenty-four torque indicator settings located on  
the front of the drill.  
Rotate the adjusting ring to the desired setting.  
1 - 4  
5 - 8  
For driving small screws  
For driving screws into soft material  
TO INCREASE  
TORQUE  
9 - 12 For driving screws into soft and hard  
materials  
Fig. 8  
13 - 16 For driving screws into hard wood  
17 - 23 For driving large screws  
For heavy drilling  
DRILLING  
See Figure 9.  
Depress and release the switch trigger to be sure the drill  
is in the OFF position before connecting it to a power  
supply.  
Check the direction of rotation selector for the correct  
setting (forward or reverse).  
Secure the material to be drilled in a vise or with clamps  
to keep it from turning as the drill bit rotates.  
Plug the drill into power supply. Hold the drill firmly and  
place the bit at the point to be drilled.  
Depress the switch trigger to start the drill.  
Move the drill bit into the workpiece, applying only enough  
pressure to keep the bit cutting. Do not force the drill or  
apply side pressure to elongate a hole. Let the tool do  
the work.  
WARNING:  
Be prepared for binding at bit breakthrough. When these  
situations occur, the 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. 9  
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.  
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 the drill stalls, stop  
the tool immediately. Remove the bit from the workpiece  
and determine the reason for jamming.  
12  
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MAINTENANCE  
WARNING:  
WARNING:  
Do not at any time let brake fluids, gasoline, petroleum-  
based products, penetrating oils, etc., come in contact  
with plastic parts. Chemicals can damage, weaken or  
destroy plastic which may result in serious personal  
injury.  
When servicing, use only identical replacement parts.  
Use of any other parts may create a hazard or cause  
product damage.  
WARNING:  
Electrictoolsusedonfiberglassmaterial,wallboard,spackling  
compounds, or plaster are subject to accelerated wear and  
possible premature failure because the fiberglass chips and  
grindings are highly abrasive to bearings, brushes, commu-  
tators,etc.Consequently,wedonotrecommendedusingthis  
toolforextendedworkonthesetypesofmaterials. However,  
if you do work with any of these materials, it is extremely  
important to clean the tool using compressed air.  
Always wear safety goggles or safety glasses with side  
shields during power tool operation or when blowing  
dust. If operation is dusty, also wear a dust mask.  
GENERAL MAINTENANCE  
Avoid using solvents when cleaning plastic parts. Most  
plastics are susceptible to damage from various types of  
commercial solvents and may be damaged by their use. Use  
clean cloths to remove dirt, dust, oil, grease, etc.  
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 lubrica-  
tion is required.  
13  
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MAINTENANCE  
CHUCK REMOVAL  
See Figures 10 - 12.  
MALLET  
The chuck may be removed and replaced with a new one.  
Unplug the drill.  
CHUCK  
JAWS  
Insert a 5/16 in. or larger hex key into the chuck of the  
drill and tighten the chuck jaws securely.  
Tap the hex key sharply with a mallet in a clockwise di-  
rection. This will loosen the screw in the chuck for easy  
removal.  
Open the chuck jaws and remove the hex key. Using a  
screwdriver, remove the chuck screw by turning it in a  
clockwise direction.  
NOTE: The chuck screw has left hand threads.  
KEYLESS  
CHUCK  
HEX KEY  
Insert the hex key into the chuck and tighten the chuck  
jaws securely. Tap sharply with a mallet in a counterclock-  
wise direction. This will loosen the chuck on the spindle.  
It can now be unscrewed by hand.  
Fig. 10  
TO RETIGHTEN A LOOSE CHUCK  
The chuck may become loose on the spindle and develop  
a wobble. Also, the chuck screw may become loose, caus-  
ing the chuck jaws to bind and prevent them from closing.  
To tighten:  
SCREWDRIVER  
Unplug the drill.  
Open the chuck jaws.  
Insert a hex key into the chuck and tighten chuck jaws  
securely. Tap the hex key sharply with a mallet in a  
clockwise direction. This will tighten the chuck on the  
spindle.  
Fig. 11  
Open the chuck jaws and remove the hex key.  
Tighten the chuck screw.  
MALLET  
HEX KEY  
Fig. 12  
14  
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NOTES  
15  
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OPERATOR’S MANUAL  
3/8 in. DRILL  
DOUBLE INSULATED  
D46C  
• SERVICE  
Now that you have purchased your tool, should a need ever exist for repair parts or service,  
simply contact your nearest Authorized Service Center. Be sure to provide all pertinent  
facts when you call or visit. Please call 1-800-525-2579 for your nearest Authorized  
list of Authorized Service Centers.  
• MODEL NO. AND SERIAL NO.  
The model number of this tool will be found on a plate attached to the motor housing.  
Please record the model number and serial number in the space provided below.  
• HOW TO ORDER REPAIR PARTS  
When ordering repair parts, always give the following information:  
D46C  
• MODEL NUMBER  
• SERIAL NUMBER  
Ryobi® is a registered trademark of Ryobi® Limited used under license.  
ONE WORLD TECHNOLOGIES, INC.  
1428 Pearman Dairy Road, Anderson, SC 29625  
Phone 1-800-525-2579  
983000-808  
01-09-05 (REV:00)  
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