Ryobi D46C D46CK_808_eng User Manual To The 67aab63d 5887 4845 8966 0cde63e7e16f

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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

TABLE OF CONTENTS
 Introduction ...................................................................................................................................................................... 2
� General Safety Rules .....................................................................................................................................................3-4
� Specific Safety Rules ....................................................................................................................................................... 4
� Symbols ........................................................................................................................................................................5-6
� Electrical ........................................................................................................................................................................... 7
� Features............................................................................................................................................................................ 8
� Assembly .......................................................................................................................................................................... 9
� Operation.....................................................................................................................................................................9-12
� Maintenance ..............................................................................................................................................................13-14
� Parts Ordering / Service ....................................................................................................................................Back Page

INTRODUCTION
This tool has many features for making its use more pleasant and enjoyable. Safety, performance, and dependability have
been given top priority in the design of this product making it easy to maintain and operate.

WARRANTY
®
RYOBI
AND
3030
DAY
EXCHANGE
POLICY
RYOBI® POWER
POWER TOOL
TOOL--LIMITED
LIMITEDTWO
TWOYEAR
YEARWARRANTY
WARRANTY
AND
DAY
EXCHANGE
POLICY
®
Ryobi
Technologies,
Inc.,Inc.,
(“RYOBI”)
warrants
its power
One
World
Technologies,
warrants
its RYOBI
powertools
toolswith
with the
the following
following conditions:
conditions:
30-DAY EXCHANGE
EXCHANGE POLICY:
POLICY: During
During the
the first
first 30
30 days
days after
after date
date of purchase,
30-DAY
purchase, you may either request service under this
warranty or
or you
you may
may exchange
exchange any
anyRYOBI
Ryobi ®power
powertool
toolwhich
whichdoes
doesnot
notwork
workproperly
properly due
due to
to defective
defective workmanship
workmanship or
warranty
materials by
by returning
returning the
the power
power tool
tool to the dealer from which it was purchased.
materials
purchased. To receive a replacement
replacement power tool
warranty service,
service, you
you must
must present
present proof
proof of purchase and return all original equipment packaged
or requested
requested warranty
packaged with the
original product.
product.The
Thereplacement
replacementpower
power
tool
covered
by limited
the limited
warranty
forbalance
the balance
two
year
original
tool
willwill
be be
covered
by the
warranty
for the
of the of
twothe
year
period
period
of the purchase.
original purchase.
from
thefrom
datethe
of date
the original
WHAT THIS
THIS WARRANTY
WARRANTYCOVERS:
COVERS:This
Thiswarranty
warrantycovers
coversallalldefects
defectsininworkmanship
workmanshiporormaterials
materials
your
Ryobi® power
WHAT
inin
your
RYOBI
tool for a period of two years
years from
from the
the date
date of
of purchase.
purchase. With
With the
the exception
exception of batteries,
batteries, power tool accessories are
warranted for
for ninety
ninety(90)
(90)days.
days.Batteries
Batteriesare
arewarranted
warrantedforfor
two
years.
warranted
two
years.
HOW TO GET SERVICE:
HOW
SERVICE: Just return the power tool, properly packaged and postage prepaid, to an Authorized
Authorized Service
Center. You can obtain
service
representative
at at
Ryobi,
Center.
obtain the
the location
location of
ofthe
theService
ServiceCenter
Centernearest
nearestyou
youbybycontacting
contactinga a
service
representative
One
P.O. Box
1207, Anderson,
SCBox
29622-1207,
by calling
1-800-525-2579
or by
logging on to or
Ryobi’s
website
atwww.
http:
World
Technologies,
Inc., P.O.
1207, Anderson,
SC 29622-1207,
by calling
1-800-525-2579
by logging
on to
//www.ryobitools.com.
When
you request
warranty
youalso
must
also present
of purchase
documentation
ryobitools.com.
When you
request
warranty
service,service,
you must
present
proof ofproof
purchase
documentation,
which
which includes
of purchase
(for example,
a bill We
of sale).
We will
faulty workmanship
either
repair
includes
the datethe
of date
purchase
(for example,
a bill of sale).
will repair
anyrepair
faulty any
workmanship,
and eitherand
repair
or replace
or replace
anypart,
defective
part, atWe
ourwill
option.
will do
without
any charge
to you. We
will
complete
the worktime,
in a
any
defective
at our option.
do soWe
without
anyso
charge
to you.
We will complete
the
work
in a reasonable
reasonable
time,within
but, inninety
any case,
within
but,
in any case,
(90) days
or ninety
less. (90) days or less.
WHAT’S NOT
NOT COVERED:
COVERED: This
This warranty
warranty applies
applies only
only to
to the
the original
original purchaser
purchaser at
at retail
retail and
and may not be transferred. This
WHAT’S
warranty only
only covers
covers defects
defectsarising
arisingunder
undernormal
normalusage
usageand
anddoes
doesnot
notcover
coverany
anymalfunction,
malfunction,failure
failure,
defects
resultwarranty
oror
defects
resulting
ing from
misuse,
abuse,
neglect,
alteration,
modification,
or repairs
by other
Authorized
Service
Centers.
from
misuse,
abuse,
neglect,
alteration,
modification
or repairs
by other
than than
Authorized
Service
Centers.
One Ryobi
World
makes no warranties,
representations,
promises as toor
the
quality or
power toolsofother
than those
Technologies,
Inc. makes
no warranties,orrepresentations
promises
asperformance
to the qualityoforitsperformance
its power
tools
specifically
stated
in this warranty.
other
than those
specifically
stated in this warranty.
ADDITIONAL LIMITATIONS:
LIMITATIONS:Any
Anyimplied
impliedwarranties
warranty granted
ADDITIONAL
granted under
under state
state law,
law, including
including warranties
warranties of
of merchantability
merchantability or
fitness for
for a particular
particular purpose,
purpose, are
are limited
limited to
to two
two years
years from
from the
the date
dateof
of purchase.
purchase.One
Ryobi
is not
responsible Inc.
for direct,
fitness
World
Technologies,
is not
indirect, or incidental
the above
limitations
andabove
exclusions
may and
not apply
to you.
This
you
responsible
for direct, damages,
indirect, orso
incidental
damages,
so the
limitations
exclusions
may
notwarranty
apply togives
you. This
specific legal
and you
may
also and
haveyou
other
rights
vary rights
from state
state.
warranty
givesrights,
you specific
legal
rights,
may
also which
have other
whichtovary
from state to state.

2

GENERAL SAFETY RULES

 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.

 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, nonskid safety shoes, hard hat, or hearing
protection must be used for appropriate conditions.
 Do not wear loose clothing or jewelry. Contain long
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.

ELECTRICAL SAFETY

TOOL USE AND CARE

 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 threewire 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.

 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 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.
 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.
 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.
Following this rule will reduce the risk of loss of control and deterioration of the enclosure plastic.

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

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 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.
3

GENERAL SAFETY RULES
SERVICE

 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
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
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.

 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 shock, fire, or serious injury.

 Know your power tool. Read operator’s manual carefully. 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 recommended. 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.

4

SYMBOLS
Some of the following symbols may be used on this 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

Minutes

Time

Alternating Current

Type of current

Direct Current

Type or a characteristic of current

No Load Speed

Rotational speed, at no load

Class II Construction

Double-insulated construction

Per Minute

Revolutions, strokes, surface speed, orbits etc., per minute

Wet Conditions Alert

Do not expose to rain or use in damp locations.

Read The Operator’s Manual

To reduce the risk of injury, user must read and understand
operator’s manual before using this product.

Eye Protection

Always wear safety goggles or safety glasses with side shields and,
as necessary, a full face shield when operating this product.

Safety Alert

Precautions that involve your safety.

No Hands Symbol

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

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.

Hot Surface

To reduce the risk of injury or damage, avoid contact with any hot
surface.

min

no

.../min

5

SYMBOLS
The following signal words and meanings are intended to explain the levels of risk associated with this product.
SYMBOL

SIGNAL

MEANING

DANGER:

Indicates an imminently hazardous situation, which, if not avoided, will result
in death or serious injury.

WARNING:

Indicates a potentially hazardous situation, which, if not avoided, could result
in death or serious injury.

CAUTION

Indicates a potentially hazardous situation, which, if not avoided, may result in
minor or moderate injury.

CAUTION

(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 servicing, use only identical replacement parts.

To avoid serious personal injury, do not attempt to use this
product until you read thoroughly and understand completely 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

6

ELECTRICAL
DOUBLE INSULATION

EXTENSION CORDS

Double insulation is a concept in safety in electric power
tools, which eliminates the need for the usual threewire 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.
When working outdoors with a tool, use an extension cord
that is designed for outside use. This type of cord is designated with “WA” on the cord’s jacket.
Before using any extension cord, inspect it for loose or
exposed wires and cut or worn insulation.

WARNING:
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.
NOTE: 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 authorized
service center for repair. Always use original factory replacement parts when servicing.

**Ampere rating (on tool data plate)

0-2.0

2.1-3.4

Cord Length

ELECTRICAL CONNECTION
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.

3.5-5.0

5.1-7.0

7.1-12.0 12.1-16.0

Wire Size (A.W.G.)

25'

16

16

16

16

14

14

50'

16

16

16

14

14

12

100'

16

16

14

12

10

—

**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.

7

FEATURES
PRODUCT SPECIFICATIONS
Chuck ....................................................................... 3/8 in.

No Load Speed ..............................................0-1,000/min.

Switch............................. Variable Speed Reversible (VSR)

Input ............................... 120 V, 60 Hz, AC only, 4.5 Amps

Clutch ............................................................. 24 Positions

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 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 keyless chuck allows you to hand-tighten or release
the drill bit in the chuck jaws.
The lock-on button is convenient for continuous drilling for
extended periods of time.

TORQUE ADJUSTMENT RING

BIT STORAGE

Your drill has a 24-position clutch. The torque adjustment
ring can be turned to select the right amount of torque for
your application.

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

(FORWARD/REVERSE)
Your drill has a direction of rotation (forward/reverse) selector
located above the switch trigger for changing the direction
of bit rotation.

The variable speed switch trigger delivers higher speed
with increased trigger pressure and lower speed with
decreased trigger pressure.

8

ASSEMBLY
UNPACKING

WARNING:

This product has been shipped completely assembled.

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.
 Do not discard the packing material until you have carefully inspected and satisfactorily operated the tool.
 If any parts are damaged or missing, please call
1-800-525-2579 for assistance.

WARNING:
Do not attempt to modify this tool or create accessories 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.

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

WARNING:

See Figure 2.
To turn the drill ON, depress the switch trigger. To turn it
OFF, release the switch trigger.

Do not allow familiarity with tools to make you careless. Remember that a careless fraction of a second is
sufficient to inflict serious injury.

VARIABLE SPEED

The variable speed switch delivers higher speed and torque
with increased trigger pressure and lower speed with
decreased trigger pressure.
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.

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.

DIRECTION OF
ROTATION SELECTOR
FORWARD/REVERSE

WARNING:

REVERSE

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.

LOCK-ON
BUTTON

APPLICATIONS
You may use this tool for the purposes listed below:
 Drilling in wood
 Drilling in ceramics, plastics, fiberglass, and laminates
 Drilling in metals
 Mixing paint

FORWARD
SWITCH TRIGGER
9

Fig. 2

OPERATION
DIRECTION OF ROTATION SELECTOR
(FORWARD/REVERSE)
See Figure 2.

UNLOCK
(RELEASE)

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 BODY

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 removing 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

OPERATION
INSTALLING BITS
See Figure 5 - 6.
 Unplug the drill.

CHUCK
JAWS

UNLOCK
(RELEASE)

CHUCK BODY

 Open or close the chuck jaws to a point where the opening 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.

WARNING:

DRILL BIT

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
RIGHT

Fig. 5

 Tighten the chuck jaws securely on the bit.
NOTE: Rotate the chuck body in the direction of the arrow 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
of the handle.
 Release the switch trigger.

LOCK-ON
BUTTON

 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

OPERATION
ADJUSTABLE TORQUE CLUTCH

TO DECREASE
TORQUE

See Figure 8.
This product is equipped with an adjustable torque
clutch for driving different types of screws into different
materials. The proper setting depends on the type of material
and the size of screw you are using.

TORQUE
ADJUSTMENT RING

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
For driving small screws
• 5-8
For driving screws into soft material
• 9 - 12 For driving screws into soft and hard
materials
•

13 - 16 For driving screws into hard wood

•
•

17 - 23 For driving large screws
For heavy drilling

TO INCREASE
TORQUE

Fig. 8

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

MAINTENANCE
WARNING:

WARNING:

Do not at any time let brake fluids, gasoline, petroleumbased 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:

Electric tools used on fiberglass material, 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, commutators, etc. Consequently, we do not recommended using this
tool for extended work on these types of materials. 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 lubrication is required.

13

MAINTENANCE
CHUCK REMOVAL

MALLET

See Figures 10 - 12.
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 direction. 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.

HEX KEY

 Insert the hex key into the chuck and tighten the 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.

KEYLESS
CHUCK

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, causing 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

NOTES

15

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
Service Center. You can also check our web site at www.ryobitools.com for a complete
list of Authorized Service Centers.

• MODEL NO. AND SERIAL NO.

The model number of this tool will be found on a plate attached to the motor housing.
Please record the model number and serial number in the space provided below.

• HOW TO ORDER REPAIR PARTS

When ordering repair parts, always give the following information:
•

MODEL NUMBER

•

SERIAL NUMBER

D46C

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
www.ryobitools.com

983000-808
01-09-05 (REV:00)

16



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