DeWalt DC411KA Le manuel du propriétaire

DC411 Cordless Cut-Off Tool

Outil à tronçonner sans fil DC411

DC411 Desbastadora sin cables

INSTRUCTION MANUAL

GUIDE D’UTILISATION

MANUAL DE INSTRUCCIONES

INSTRUCTIVO DE OPERACIÓN, CENTROS DE SERVICIO Y PÓLIZA DE

GARANTÍA. ADVERTENCIA: LÉASE ESTE INSTRUCTIVO ANTES DE

USAR EL PRODUCTO.

If you have questions or comments, contact us.

Pour toute question ou tout commentaire, nous contacter.

Si tiene dudas o comentarios, contáctenos.

1-800-4-DEWALT • www.dewalt.com

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Deﬁ nitions: Safety Guidelines

The definitions below describe the level of severity for each

signal word. Please read the manual and pay attention to these

symbols.

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.

NOTICE: Indicates a practice not related to personal injury

which, if not avoided, may result in property damage.

IF YOU HAVE ANY QUESTIONS OR COMMENTS ABOUT THIS OR

ANY DEWALT TOOL, CALL US TOLL FREE AT: 1-800-4-DEWALT

(1-800-433-9258).

WARNING: To reduce the risk of injury, read the instruction

manual.

General Power Tool Safety Warnings

WARNING! Read all safety warnings and all instructions.

Failure to follow the warnings and instructions may result in

electric shock, fire and/or serious injury.

SAVE ALL WARNINGS AND INSTRUCTIONS

FOR FUTURE REFERENCE

The term “power tool” in the warnings refers to your mains-operated

(corded) power tool or battery-operated (cordless) power tool.

1) WORK AREA SAFETY

a) Keep work area clean and well lit. Cluttered or dark areas

invite accidents.

b) 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.

c) Keep children and bystanders away while operating a

power tool. Distractions can cause you to lose control.

2) ELECTRICAL SAFETY

a) Power tool plugs must match the outlet. Never modify

the plug in any way. Do not use any adapter plugs with

earthed (grounded) power tools. Unmodified plugs and

matching outlets will reduce risk of electric shock.

b) Avoid body contact with earthed or grounded surfaces

such as pipes, radiators, ranges and refrigerators. There

is an increased risk of electric shock if your body is earthed or

grounded.

c) Do not expose power tools to rain or wet conditions.

Water entering a power tool will increase the risk of electric

shock.

d) Do not abuse the cord. Never use the cord for carrying,

pulling or unplugging the power tool. Keep cord away

from heat, oil, sharp edges or moving parts. Damaged or

entangled cords increase the risk of electric shock.

e) When operating a power tool outdoors, use an extension

cord suitable for outdoor use. Use of a cord suitable for

outdoor use reduces the risk of electric shock.

f) If operating a power tool in a damp location is unavoidable,

use a ground fault circuit interrupter (GFCI) protected

supply. Use of a GFCI reduces the risk of electric shock.

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3) PERSONAL SAFETY

a) Stay alert, watch what you are doing and use common

sense when operating a power tool. Do not use a power

tool while you are tired or under the influence of drugs,

alcohol or medication. A moment of inattention while

operating power tools may result in serious personal injury.

b) Use personal protective equipment. Always wear eye

protection. Protective equipment such as dust mask, non-

skid safety shoes, hard hat, or hearing protection used for

appropriate conditions will reduce personal injuries.

c) Prevent unintentional starting. Ensure the switch is in

the off position before connecting to power source and/

or battery pack, picking up or carrying the tool. Carrying

power tools with your finger on the switch or energizing power

tools that have the switch on invites accidents.

d) Remove any adjusting key or wrench before turning the

power tool on. A wrench or a key left attached to a rotating

part of the power tool may result in personal injury.

e) Do not overreach. Keep proper footing and balance at

all times. This enables better control of the power tool in

unexpected situations.

f) Dress properly. Do not wear loose clothing or jewelry.

Keep your hair, clothing and gloves away from moving

parts. Loose clothes, jewelry or long hair can be caught in

moving parts.

g) If devices are provided for the connection of dust

extraction and collection facilities, ensure these are

connected and properly used. Use of dust collection can

reduce dust-related hazards.

4) POWER TOOL USE AND CARE

a) Do not force the power tool. Use the correct power tool

for your application. The correct power tool will do the job

better and safer at the rate for which it was designed.

b) Do not use the power tool if the switch does not turn it

on and off. Any power tool that cannot be controlled with the

switch is dangerous and must be repaired.

c) Disconnect the plug from the power source and/or the

battery pack from the power tool before making any

adjustments, changing accessories, or storing power

tools. Such preventive safety measures reduce the risk of

starting the power tool accidentally.

d) Store idle power tools out of the reach of children and

do not allow persons unfamiliar with the power tool or

these instructions to operate the power tool. Power tools

are dangerous in the hands of untrained users.

e) Maintain power tools. Check for misalignment or binding

of moving parts, breakage of parts and any other

condition that may affect the power tool’s operation. If

damaged, have the power tool repaired before use. Many

accidents are caused by poorly maintained power tools.

f) Keep cutting tools sharp and clean. Properly maintained

cutting tools with sharp cutting edges are less likely to bind and

are easier to control.

g) Use the power tool, accessories and tool bits etc., in

accordance with these instructions taking into account

the working conditions and the work to be performed.

Use of the power tool for operations different from those

intended could result in a hazardous situation.

5) BATTERY TOOL USE AND CARE

a) Recharge only with the charger specified by the

manufacturer. A charger that is suitable for one type of

battery pack may create a risk of fire when used with another

battery pack.

b) Use power tools only with specifically designated battery

packs. Use of any other battery packs may create a risk of

injury and fire.

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c) When battery pack is not in use, keep it away from other

metal objects like paper clips, coins, keys, nails, screws,

or other small metal objects that can make a connection

from one terminal to another. Shorting the battery terminals

together may cause burns or a fire.

d) Under abusive conditions, liquid may be ejected from

the battery; avoid contact. If contact accidentally occurs,

flush with water. If liquid contacts eyes, additionally seek

medical help. Liquid ejected from the battery may cause

irritation or burns.

6) SERVICE

a) Have your power tool serviced by a qualified repair

person using only identical replacement parts. This will

ensure that the safety of the power tool is maintained.

SAFETY INSTRUCTIONS FOR

ALL OPERATIONS

Safety Warnings Common for Grinding,

Sanding, Wire Brushing, Polishing or

Abrasive, Cutting-Off Operations

a) This power tool is intended to function as a grinder,

sander, wire brush, polisher or cut-off tool. Read all safety

warnings, instructions, illustrations and specifications

provided with this power tool. Failure to follow all instructions

listed below may result in electric shock, fire and/or serious

injury.

b) Do not use accessories which are not specifically

designed and recommended by the tool manufacturer.

Just because the accessory can be attached to your power

tool, it does not assure safe operation.

c) The rated speed of the accessory must be at least

equal to the maximum speed marked on the power tool.

Accessories running faster than their rated speed can break

and fly apart.

d) The outside diameter and the thickness of your accessory

must be within the capacity rating of your power tool.

Incorrectly sized accessories cannot be adequately guarded or

controlled.

e) Threaded mounting of accessories must match the

grinder spindle thread. For accessories mounted by flanges,

the arbor hole of the accessory must fit the locating diameter

of the flange. Accessories that do not match the mounting

hardware of the power tool will run out of balance, vibrate

excessively and may cause loss of control.

f) Do not use a damaged accessory. Before each use

inspect the accessory such as abrasive wheels for chips

and cracks, backing pad for cracks, tear or excess wear,

wire brush for loose or cracked wires. If power tool or

accessory is dropped, inspect for damage or install an

undamaged accessory. After inspecting and installing an

accessory, position yourself and bystanders away from

the plane of the rotating accessory and run the power

tool at maximum no-load speed for one minute. Damaged

accessories will normally break apart during this test time.

g) Wear personal protective equipment. Depending on

application, use face shield, safety goggles or safety

glasses. As appropriate, wear dust mask, hearing

protectors, gloves and workshop apron capable of

stopping small abrasive or workpiece fragments. The eye

protection must be capable of stopping flying debris generated

by various operations. The dust mask or respirator must be

capable of filtrating particles generated by your operation.

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Prolonged exposure to high intensity noise may cause hearing

loss.

h) Keep bystanders a safe distance away from work area.

Anyone entering the work area must wear personal

protective equipment. Fragments of workpiece or of a

broken accessory may fly away and cause injury beyond

immediate area of operation.

i) Hold the power tool by insulated gripping surfaces

only, when performing an operation where the cutting

accessory may contact hidden wiring. Cutting accessory

contacting a “live” wire may make exposed metal parts of the

power tool “live” and shock the operator.

j) Position the cord clear of the spinning accessory. If you

lose control, the cord may be cut or snagged and your hand or

arm may be pulled into the spinning accessory.

k) Never lay the power tool down until the accessory has

come to a complete stop. The spinning accessory may grab

the surface and pull the power tool out of your control.

l) Do not run the power tool while carrying it at your side.

Accidental contact with the spinning accessory could snag

your clothing, pulling the accessory into your body.

m) Regularly clean the power tool’s air vents. The motor’s

fan will draw the dust inside the housing and excessive

accumulation of powdered metal may cause electrical hazards.

n) Do not operate the power tool near flammable materials.

Sparks could ignite these materials.

o) Do not use accessories that require liquid coolants.

Using water or other liquid coolants may result in electrocution

or shock.

p) Do not use Type 11 (flaring cup) wheels on this tool. Using

inappropriate accessories can result in injury.

q) Always use side handle. Tighten the handle securely. The

side handle should always be used to maintain control of the

tool at all times.

r) When starting the tool with a new or replacement wheel,

or a new or replacement wire brush installed, hold the

tool in a well protected area and let it run for one minute.

If the wheel has an undetected crack or flaw, it should burst in

less than one minute. If the wire brush has loose wires, they will

be detected. Never start the tool with a person in line with the

wheel. This includes the operator.

Causes and Operator Prevention

of Kickback

Kickback is a sudden reaction to a pinched or snagged rotating

wheel, backing pad, brush or any other accessory. Pinching or

snagging causes rapid stalling of the rotating accessory which

in turn causes the uncontrolled power tool to be forced in the

direction opposite of the accessory’s rotation at the point of the

binding.

For example, if an abrasive wheel is snagged or pinched by the

workpiece, the edge of the wheel that is entering into the pinch

point can dig into the surface of the material causing the wheel

to climb out or kick out. The wheel may either jump toward or

away from the operator, depending on direction of the wheel’s

movement at the point of pinching. Abrasive wheels may also

break under these conditions.

Kickback is the result of tool misuse and/or incorrect operating

procedures or conditions and can be avoided by taking proper

precautions as given below:

a) Maintain a firm grip on the power tool and position your

body and arm to allow you to resist kickback forces.

Always use auxiliary handle, if provided, for maximum

control over kickback or torque reaction during start up.

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The operator can control torque reaction or kickback forces, if

proper precautions are taken.

b) Never place your hand near the rotating accessory.

Accessory may kickback over your hand.

c) Do not position your body in the area where power tool

will move if kickback occurs. Kickback will propel the tool

in direction opposite to the wheel’s movement at the point of

snagging.

d) Use special care when working corners, sharp edges etc.

Avoid bouncing and snagging the accessory. Corners,

sharp edges or bouncing have a tendency to snag the rotating

accessory and cause loss of control or kickback.

e) Do not attach a saw chain woodcarving blade or toothed

saw blade. Such blades create frequent kickback and loss of

control.

Safety Warnings Speciﬁ c for Grinding and

Abrasive Cutting-Off Operations

a) Use only wheel types that are recommended for your

power tool and the specific guard designed for the

selected wheel. Wheels for which the power tool was not

designed cannot be adequately guarded and are unsafe.

b) The grinding surface of center depressed wheels must

be mounted below the plane of the guard lip. An

improperly mounted wheel that projects through the plane of

the guard lip cannot be adequately protected.

c) The guard must be securely attached to the power tool

and positioned for maximum safety, so the least amount

of wheel is exposed towards the operator. The guard

helps to protect operator from broken wheel fragments and

accidental contact with wheel.

d) Wheels must be used only for recommended applications.

For example: do not grind with the side of cut-off wheel.

Abrasive cut-off wheels are intended for peripheral grinding,

side forces applied to these wheels may cause them to shatter.

e) Always use undamaged wheel flanges that are of correct

size and shape for your selected wheel. Proper wheel

flanges support the wheel thus reducing the possibility of wheel

breakage. Flanges for cut-off wheels may be different from

grinding wheel flanges.

f) Do not use worn down wheels from larger power tools.

Wheel intended for larger power tool is not suitable for the

higher speed of a smaller tool and may burst.

Additional Safety Warnings Speciﬁ c for

Abrasive Cutting-Off Operations

a) Do not “jam” the cut-off wheel or apply excessive

pressure. Do not attempt to make an excessive depth

of cut. Overstressing the wheel increases the loading and

susceptibility to twisting or binding of the wheel in the cut and

the possibility of kickback or wheel breakage.

b) Do not position your body in line with and behind the

rotating wheel. When the wheel, at the point of operation, is

moving away from your body, the possible kickback may propel

the spinning wheel and the power tool directly at you.

c) When wheel is binding or when interrupting a cut for any

reason, switch off the power tool and hold the power

tool motionless until the wheel comes to a complete

stop. Never attempt to remove the cut-off wheel from

the cut while the wheel is in motion otherwise kickback

may occur. Investigate and take corrective action to eliminate

the cause of wheel binding.

d) Do not restart the cutting operation in the workpiece.

Let the wheel reach full speed and carefully reenter the

cut. The wheel may bind, walk up or kickback if the power tool

is restarted in the workpiece.

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e) Support panels or any oversized workpiece to minimize

the risk of wheel pinching and kickback. Large workpieces

tend to sag under their own weight. Supports must be placed

under the workpiece near the line of cut and near the edge of

the workpiece on both sides of the wheel.

f) Use extra caution when making a “pocket cut” into

existing walls or other blind areas. The protruding wheel

may cut gas or water pipes, electrical wiring or objects that can

cause kickback.

Safety Warnings Speciﬁ c for Sanding

Operations

a) Do not use excessively oversized sanding disc paper.

Follow manufacturers recommendations, when selecting

sanding paper. Larger sanding paper extending beyond the

sanding pad presents a laceration hazard and may cause

snagging, tearing of the disc or kickback.

Safety Warnings Speciﬁ c for Polishing

Operations

a) Do not allow any loose portion of the polishing bonnet

or its attachment strings to spin freely. Tuck away or

trim any loose attachment strings. Loose and spinning

attachment strings can entangle your fingers or snag on the

workpiece.

Safety Warnings Speciﬁ c for Wire

Brushing Operations

a) Be aware that wire bristles are thrown by the brush even

during ordinary operation. Do not overstress the wires

by applying excessive load to the brush. The wire bristles

can easily penetrate light clothing and/or skin.

b) If the use of a guard is recommended for wire brushing,

do not allow any interference of the wire wheel or brush

with the guard. Wire wheel or brush may expand in diameter

due to work and centrifugal forces.

c) Safety goggles or safety glasses with side shields and a

full face shield compliant with ANSI Z87.1 MUST be worn

by the operator and others that are within 50’ (15.2 m) of

the use of this product.

Additional Safety Information

WARNING: ALWAYS use safety glasses. Everyday eyeglasses are

NOT safety glasses. Also use face or dust mask if cutting operation is

dusty. ALWAYS WEAR CERTIFIED SAFETY EQUIPMENT:

• ANSI Z87.1 eye protection (CAN/CSA Z94.3),

• ANSI S12.6 (S3.19) hearing protection,

• NIOSH/OSHA/MSHA respiratory protection.

WARNING: Some dust created by power sanding, sawing,

grinding, drilling, and other construction activities contains chemicals

known to the State of California 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.

• Avoid prolonged contact with dust from power sanding,

sawing, grinding, drilling, and other construction activities.

Wear protective clothing and wash exposed areas with

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soap and water. Allowing dust to get into your mouth, eyes, or

lay on the skin may promote absorption of harmful chemicals.

WARNING: Use of this tool can generate and/or disperse dust,

which may cause serious and permanent respiratory or other injury.

Always use NIOSH/OSHA approved respiratory protection appropriate

for the dust exposure. Direct particles away from face and body.

WARNING: Always wear proper personal hearing protection

that conforms to ANSI S12.6 (S3.19) during use. Under some

conditions and duration of use, noise from this product may

contribute to hearing loss.

WARNING: Always use eye protection. All users and

bystanders must wear eye protection that conforms to ANSI Z87.1.

WARNING: When not in use, place grinder on a stable

surface where it will not move inadvertantly, roll or cause a

tripping or falling hazard. The grinder may stand upright on the

battery pack but may be easily knocked over. Serious personal injury

may result.

CAUTION: To reduce the risk of personal injury, use extra care

when working into a corner or edge because a sudden, sharp

movement of the tool may be experienced when the wheel or other

accessory contacts a secondary surface or a surface edge.

• The label on your tool may include the following symbols. The

symbols and their definitions are as follows:

V ................... volts A ......................amperes

Hz ................. hertz W .....................watts

min ............... minutes or AC ..........alternating

or DC ... direct current ........................current

................. Class I Construction or AC/DC ...alternating

.....................

..................... (grounded) ........................or direct

................. Class II Construction ........................current

..................... (double insulated) no ....................no load

…/min ..........per minute ........................speed

BPM ............. beats per minute

n ......................rated

IPM ............... impacts per minute ........................speed

RPM ............. revolutions per .....................earthing

..................... minute ........................terminal

sfpm ............. surface feet ..................... safety alert

..................... per minute ........................symbol

SPM ............. strokes per minute

Important Safety Instructions for All

Battery Packs

When ordering replacement battery packs, be sure to include catalog

number and voltage. Consult the chart at the end of this manual for

compatibility of chargers and battery packs.

The battery pack is not fully charged out of the carton. Before using

the battery pack and charger, read the safety instructions below. Then

follow charging procedures outlined.

READ ALL INSTRUCTIONS

• Do not charge or use battery in explosive atmospheres,

such as in the presence of flammable liquids, gases or dust.

Inserting or removing the battery from the charger may ignite the

dust or fumes.

• NEVER force battery pack into charger. DO NOT modify

battery pack in any way to fit into a non-compatible charger

as battery pack may rupture causing serious personal

injury. Consult the chart at the end of this manual for compatibility

of batteries and chargers.

• Charge the battery packs only in DEWALT chargers.

• DO NOT splash or immerse in water or other liquids.

• Do not store or use the tool and battery pack in locations

where the temperature may reach or exceed 105 °F (40 °C)

(such as outside sheds or metal buildings in summer).

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DANGER: Electrocution hazard. Never attempt to open the battery

pack for any reason. If battery pack case is cracked or damaged, do

not insert into charger. Do not crush, drop or damage battery pack.

Do not use a battery pack or charger that has received a sharp blow,

been dropped, run over or damaged in any way (i.e., pierced with a

nail, hit with a hammer, stepped on). Electric shock or electrocution

may result. Damaged battery packs should be returned to service

center for recycling.

NOTE: Battery storage and carrying caps are provided

for use whenever the battery is out of the tool or charger.

Remove cap before placing battery in charger or tool.

WARNING: Fire hazard. Do not store or carry

battery so that metal objects can contact exposed

battery terminals. For example, do not place battery in aprons,

pockets, tool boxes, product kit boxes, drawers, etc., with loose

nails, screws, keys, etc. without battery cap. Transporting batteries

can possibly cause fires if the battery terminals inadvertently

come in contact with conductive materials such as keys, coins,

hand tools and the like. The U.S. Department of Transportation

Hazardous Material Regulations (HMR) actually prohibit transporting

batteries in commerce or on airplanes (i.e., packed in suitcases and

carry-on luggage) UNLESS they are properly protected from short

circuits. So when transporting individual batteries, make sure that the

battery terminals are protected and well insulated from materials that

could contact them and cause a short circuit.

SPECIFIC SAFETY INSTRUCTIONS FOR NICKEL CADMIUM

(NiCd) OR NICKEL METAL HYDRIDE (NiMH)

• Do not incinerate the battery pack even if it is severely

damaged or is completely worn out. The battery pack can

explode in a fire.

• A small leakage of liquid from the battery pack cells may

occur under extreme usage or temperature conditions. This

does not indicate a failure.

However, if the outer seal is broken:

a. and the battery liquid gets on your skin, immediately wash with

soap and water for several minutes.

b. and the battery liquid gets into your eyes, flush them with

clean water for a minimum of 10 minutes and seek immediate

medical attention. (Medical note: The liquid is 25–35%

solution of potassium hydroxide.)

SPECIFIC SAFETY INSTRUCTIONS FOR LITHIUM ION (Li-Ion)

• Do not incinerate the battery pack even if it is severely

damaged or is completely worn out. The battery pack can

explode in a fire. Toxic fumes and materials are created when

lithium ion battery packs are burned.

• If battery contents come into contact with the skin,

immediately wash area with mild soap and water. If battery

liquid gets into the eye, rinse water over the open eye for 15

minutes or until irritation ceases. If medical attention is needed,

the battery electrolyte is composed of a mixture of liquid organic

carbonates and lithium salts.

• Contents of opened battery cells may cause respiratory

irritation. Provide fresh air. If symptoms persist, seek medical

attention.

WARNING: Burn hazard. Battery liquid may be flammable if

exposed to spark or flame.

The RBRCTM Seal

The RBRC™ (Rechargeable Battery Recycling Corp oration) Seal on

the nickel cadmium, nickel metal hydride or lithium ion

batteries (or battery packs) indicate that the costs to

recycle these batteries (or battery packs) at the end of

their useful life have already been paid by DEWALT. In

some areas, it is illegal to place spent nickel cadmium,

nickel metal hydride or lithium ion batteries in the trash

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or municipal solid waste stream and the RBRC program provides an

environmentally conscious alternative.

RBRC™ in cooperation with DEWALT and other battery users, has

established programs in the United States and Canada to facilitate

the collection of spent nickel cadmium, nickel metal hydride or lithium

ion batteries. Help protect our environment and conserve natural

resources by returning the spent nickel cadmium, nickel metal hydride

or lithium ion batteries to an authorized DEWALT service center or

to your local retailer for recycling. You may also contact your local

recycling center for information on where to drop off the spent

battery.

RBRC™ is a registered trademark of the Rechargeable Battery

Recycling Corporation.

Important Safety Instructions for All

Battery Chargers

SAVE THESE INSTRUCTIONS: This manual contains important

safety and operating instructions for battery chargers.

• Before using charger, read all instructions and cautionary markings

on charger, battery pack, and product using battery pack.

DANGER: Electrocution hazard. 120 volts are present at charging

terminals. Do not probe with conductive objects. Electric shock or

electrocution may result.

WARNING: Shock hazard. Do not allow any liquid to get inside

charger. Electric shock may result.

CAUTION: Burn hazard. To reduce the risk of injury, charge only

DEWALT rechargeable batteries. Other types of batteries may burst

causing personal injury and damage.

NOTICE: Under certain conditions, with the charger plugged in to

the power supply, the exposed charging contacts inside the charger

can be shorted by foreign material. Foreign materials of a conductive

nature such as, but not limited to, grinding dust, metal chips, steel

wool, aluminum foil, or any buildup of metallic particles should be

kept away from charger cavities. Always unplug the charger from

the power supply when there is no battery pack in the cavity. Unplug

charger before attempting to clean.

• DO NOT attempt to charge the battery pack with any

chargers other than the ones in this manual. The charger and

battery pack are specifically designed to work together.

• These chargers are not intended for any uses other than

charging DEWALT rechargeable batteries. Any other uses

may result in risk of fire, electric shock or electrocution.

• Do not expose charger to rain or snow.

• Pull by plug rather than cord when disconnecting charger.

This will reduce risk of damage to electric plug and cord.

• Make sure that cord is located so that it will not be stepped

on, tripped over, or otherwise subjected to damage or

stress.

• Do not use an extension cord unless it is absolutely

necessary. Use of improper extension cord could result in risk of

fire, electric shock, or electrocution.

• When operating a power tool outdoors, use an extension

cord suitable for outdoor use. Use of a cord suitable for

outdoor use reduces the risk of electric shock.

• An extension cord must have adequate wire size (AWG

or American Wire Gauge) for safety. The smaller the gauge

number of the wire, the greater the capacity of the cable, that is

16 gauge has more capacity than 18 gauge. An undersized cord

will cause a drop in line voltage resulting in loss of power and

overheating. When using more than one extension to make up the

total length, be sure each individual extension contains at least the

minimum wire size. The following table shows the correct size to

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use depending on cord length and nameplate ampere rating. If in

doubt, use the next heavier gauge. The smaller the gauge number,

the heavier the cord.

Minimum Gauge for Cord Sets

Ampere

Rating

Volts Total Length of Cord

in Feet (meters)

120 V 25

(7.6) 50

(15.2) 100

(30.5) 150

(45.7)

240 V 50

(15.2) 100

(30.5) 200

(61.0) 300

(91.4)

More

Than

Not

More

Than AWG

0 6 18 16 16 14

610 1816 14 12

10 12 16 16 14 12

12 16 14 12 Not Recommended

• Do not place any object on top of charger or place the

charger on a soft surface that might block the ventilation

slots and result in excessive internal heat. Place the charger

in a position away from any heat source. The charger is ventilated

through slots in the top and the bottom of the housing.

• Do not operate charger with damaged cord or plug.

• Do not operate charger if it has received a sharp blow, been

dropped, or otherwise damaged in any way. Take it to an

authorized service center.

• Do not disassemble charger; take it to an authorized service

center when service or repair is required. Incorrect reassembly

may result in a risk of electric shock, electrocution or fire.

• Disconnect the charger from the outlet before attempting

any cleaning. This will reduce the risk of electric shock.

Removing the battery pack will not reduce this risk.

• NEVER attempt to connect two chargers together.

• The charger is designed to operate on standard 120 volt

household electrical power. Do not attempt to use it on any

other voltage. This does not apply to the vehicular charger.

Using Automatic Tune-Up™ Mode

The automatic Tune-Up™ Mode equalizes or balances the

individual cells in the battery pack allowing it to function at peak

capacity. Battery packs should be tuned up weekly or after

10 charge/discharge cycles or whenever the pack no longer delivers

the same amount of work. To use the automatic Tune-Up™, place

the battery pack in the charger and leave it for at least 8 hours. The

charger will cycle through the following modes.

1. The red light will blink continuously indicating that the 1-hour

charge cycle has started.

2. When the 1-hour charge cycle is complete, the light will stay on

continuously and will no longer blink. This indicates that the pack

is fully charged and can be used at this time.

3. If the pack is left in the charger after the initial 1-hour charge, the

charger will begin the Automatic Tune-Up™ mode. This mode

continues up to 8 hours or until the individual cells in the battery

pack are equalized. The battery pack is ready for use and can be

removed at any time during the Automatic Tune-Up™ mode.

4. Once the Automatic Tune-Up™ mode is complete, the charger

will begin a maintenance charge; the red indicator will remain lit.

Chargers

Your tool uses a DEWALT charger. Be sure to read all safety

instructions before using your charger. Consult the chart at the end of

this manual for compatibility of chargers and battery packs.

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Charging Procedure (Fig. 1)

DANGER: Electrocution hazard. 120 volts are present at charging

terminals. Do not probe with conductive objects. Electric shock or

electrocution may result.

1. Plug the charger into an appropriate outlet before inserting

battery pack.

2. Insert the battery pack (J) into the charger, making sure the

pack is fully seated in charger. The red (charging) light will blink

continuously indicating that the charging process has started.

FIG. 1

J

3. The completion of charge will be indicated by the red light

remaining on continuously. The pack is fully charged and may be

used at this time or left in the charger.

Indicator Light Operation

Charge Indicators

Some chargers are designed to detect certain problems that can arise

with battery packs. Problems are indicated by the red light flashing

at a fast rate. If this occurs, re-insert battery pack into the charger. If

the problem persists, try a different battery pack to determine if the

charger is OK. If the new pack charges correctly, then the original

pack is defective and should be returned to a service center or

other collection site for recycling. If the new battery pack elicits the

same trouble indication as the original, have the charger tested at an

authorized service center.

HOT/COLD PACK DELAY

Some chargers have a Hot/Cold Pack Delay feature: when the

charger detects a battery that is hot, it automatically starts a Hot Pack

Delay, suspending charging until the battery has cooled. After the

battery has cooled, the charger automatically switches to the Pack

Charging mode. This feature ensures maximum battery life. The red

light flashes long, then short while in the Hot Pack Delay mode.

PROBLEM POWER LINE

Some chargers have a Problem Power Line indicator. When the

charger is used with some portable power sources such as

generators or sources that convert DC to AC, the charger may

temporarily suspend operation, flashing the red light with two

fast blinks followed by a pause. This indicates the power source

is out of limits.

LEAVING THE BATTERY PACK IN THE CHARGER

The charger and battery pack can be left connected with the red light

glowing indefinitely. The charger will keep the battery pack fresh and

fully charged.

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NOTE: A battery pack will slowly lose its charge when kept out of

the charger. If the battery pack has not been kept on maintenance

charge, it may need to be recharged before use. A battery pack may

also slowly lose its charge if left in a charger that is not plugged into

an appropriate AC source.

WEAK BATTERY PACKS: Chargers can also detect a weak battery

pack. Such batteries are still usable but should not be expected to

perform as much work. The charger will indicate to replace battery

pack.

Important Charging Notes

1. Longest life and best performance can be obtained if the battery

pack is charged when the air temperature is between 65 °F

and 75 °F (18 °–24 °C). DO NOT charge the battery pack in

an air temperature below +40 °F (+4.5 °C), or above +105 °F

(+40.5°C). This is important and will prevent serious damage to

the battery pack.

2. The charger and battery pack may become warm to touch while

charging. This is a normal condition, and does not indicate a

problem. To facilitate the cooling of the battery pack after use,

avoid placing the charger or battery pack in a warm environment

such as in a metal shed, or an uninsulated trailer.

3. If the battery pack does not charge properly:

a. Check operation of receptacle by plugging in a lamp or other

appliance;

b. Check to see if receptacle is connected to a light switch which

turns power off when you turn out the lights;

c. Move charger and battery pack to a location where the

surrounding air temperature is approximately 65 °F–75 °F

(18°– 24 °C);

d. If charging problems persist, take the tool, battery pack and

charger to your local service center.

4. The battery pack should be recharged when it fails to produce

sufficient power on jobs which were easily done previously. DO

NOT CONTINUE to use under these conditions. Follow the

charging procedure. You may also charge a partially used pack

whenever you desire with no adverse affect on the battery pack.

5. Under certain conditions, with the charger plugged into the power

supply, the exposed charging contacts inside the charger can

be shorted by foreign material. Foreign materials of a conductive

nature such as, but not limited to, grinding dust, metal chips, steel

wool, aluminum foil, or any buildup of metallic particles should be

kept away from charger cavities. Always unplug the charger from

the power supply when there is no battery pack in the cavity.

Unplug charger before attempting to clean.

6. Do not freeze or immerse charger in water or any other liquid.

WARNING: Shock hazard. Don’t allow any liquid to get inside

charger. Electric shock may result.

WARNING: Burn hazard. Never attempt to open the battery pack

for any reason. If the plastic housing of the battery pack breaks or

cracks, return to a service center for recycling.

Storage Recommendations

1. The best storage place is one that is cool and dry away from

direct sunlight and excess heat or cold.

2. For long storage, it is recommended to store a fully charged

battery pack in a cool dry place out of the charger for optimal

results.

NOTE: Battery packs should not be stored completely depleted of

charge. The battery pack will need to be recharged before use.

SAVE THESE INSTRUCTIONS

FOR FUTURE USE

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FIG. 2

E

FC

B

A

J

I

COMPONENTS (Fig. 2)

A. Trigger Switch G. Unthreaded Backing Flange

B. Lock-Off Button (not shown)

C. Spindle Lock Button H. Threaded Locking Flange

D. Spindle (not shown) (not shown)

E. Side Handle I. Guard

F. Abrasive Wheel J. Battery

ASSEMBLY AND ADJUSTMENTS

WARNING: To reduce the risk of serious personal injury,

turn tool off and remove the battery pack before making any

adjustments or removing/installing attachments or accessories.

An accidental start-up can cause injury.

Attaching Side Handle (Fig. 3)

The side handle (E) can be fitted to either

E

FIG. 3

side of the gear case in the threaded holes.

Before using the tool, check that the handle

is tightened se cure ly.

To improve user comfort, the gear case will

rotate 90° for cutting operations.

Rotating the Gear Case

(Fig. 4)

1. Remove the four corner screws attaching FIG. 4

the gear case to motor housing.

2. Without separating the gear case from

motor housing, rotate the gear case head

to desired position.

NOTE: If the gear case and motor housing

become separated by more than 1/8"

(3.17 mm), the tool must be serviced and

re-assembled by a DEWALT service center.

Failure to have the tool serviced may cause

brush, motor and bearing failure.

3. Re-install screws to attach the gear case to the motor housing.

Tighten screws to 20 in.-lbs. torque. Overtightening could cause

screws to strip.

Accessories

The capacity of this tool is 4-1/2" (115 mm) diameter x 1/4" (6.35mm)

thick grinding or cutting wheels. It is important to choose the correct

guards, backing pads and flanges to use with grinder accessories.

See pages 14 and 15 for information on choosing the correct

accessories.

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* NOTE: A Type 27 guard is available at extra cost from your local dealer

or authorized service center.

Type 27 guard*

4-1/2" (115 mm)

Surface Grinding Wheels

unthreaded

backing flange

threaded locking flange

Type 27 surface grinding

hubbed wheel

Type 27 guard*

Type 27 surface grinding

depressed center wheel

Wire Wheels

3" (76.2mm)

wire cup brush 4" (101.6mm)

wire wheel

Type 27 guard* Type 27 guard*

rubber backing pad

sanding disc

threaded clamp nut

Sanding Discs

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* NOTE: A Type 27 guard is available at extra cost from your local dealer

or authorized service center.

4-1/2" (115 mm)

Sanding Flap Discs

hubbed sanding

flap disc

4-1/2" (115 mm) Cutting Wheels

Type 27 guard*

unthreaded backing

flange

non-hubbed sanding

flap disc

threaded locking flange

Type 27 guard* Type 1 guard

unthreaded backing

flange

abrasive cutting wheel

threaded locking flange

Type 1 guard

unthreaded backing

flange

diamond cutting wheel

threaded locking flange

Type 1 guard

unthreaded backing

flange

Type 27 depressed

center wheel,

cutting only

threaded locking flange

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WARNING: Accessories must be rated for at least the speed

recom mended on the tool warning label. Wheels and other accessories

running over their rated accessory speed may fly apart and cause

injury. Threaded accessories must have a 5/8"-11 hub. Every

unthreaded accessory must have a 7/8" (22.2 mm) arbor hole. If it

does not, it may have been designed for a circular saw. Use only the

accessories shown on pages 14 and 15 of this manual. Accessory

ratings must always be above tool speed as shown on tool nameplate.

WARNING: Handle and store all abrasive wheels carefully to

prevent damage from thermal shock, heat, mechanical damage, etc.

Store in a dry protected area free from high humidity, freezing

temperatures or extreme temperature changes.

Mounting Guard

MOUNTING AND REMOVING GUARD (FIG. 5, 6)

CAUTION: Guards must be used with all grinding wheels,

cutting wheels, sanding flap discs, wire brushes, and wire

wheels. The tool may be used without a guard only when sanding

with conventional sanding discs. A Type 27 guard (intended for

use with depressed center grinding wheels [Type 27 and Type 29],

sanding flap discs, wire wheels and wire cup brushes) is available

at extra cost from your local dealer or authorized service center.

Grinding and cutting with wheels other than Type 27 and 29

require different accessory guards not included with tool. A Type

1 guard is provided for use with the Type 1 wheel. Mounting

instructions for accessory guards are shown below and are also

included in the accessory package.

1. Open the guard latch (K), and align the lugs (L) on the guard with

the slots on the gear case (M). This will align the lugs on the guard

with the slots on the gear case cover.

FIG. 5 L

K

MI

2. Push the guard down until the guard lugs engage and rotate freely

in the groove on the gear case hub.

3. With the guard latch open, rotate the guard (I) into the desired

working position. The guard body should be positioned between

the spindle and the operator to provide maximum operator

protection.

4. Close the guard latch to secure the guard on the gear case. You

should not be able to rotate the guard by hand when the latch

is closed. Do not operate the grinder with a loose guard or the

clamp lever in open position.

5. To remove the guard, open the guard latch, rotate the guard so

that the arrows are aligned and pull up on the guard.

NOTE: The guard is pre-adjusted to

N

FIG. 6

the diameter of the gear case hub at

the factory. If, after a period of time, the

guard becomes loose, tighten the

adjusting screw (N) with clamp lever in

the closed position with guard installed

on the tool.

CAUTION: Do not tighten the adjusting screw with the clamp

lever in the open position. Undetectable damage to the guard or the

mounting hub may result.

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CAUTION: If the guard cannot be tightened by the adjusting

clamp, do not use the tool. To reduce the risk of personal injury, take

the tool and guard to a service center to repair or replace the guard.

NOTE: Edge grinding and cutting can be performed with Type 27

wheels designed and specified for this purpose; 1/4" (6.35 mm)

thick wheels are designed for surface grinding while thinner Type 27

wheels need to be examined for the manufacturer’s label to see if

they can be used for surface grinding or only edge grinding/cutting.

A Type 1 guard must be used for any wheel where surface grinding

is forbidden. Cutting can also be performed by using a Type1 wheel

and a Type 1 guard.

OPERATION

WARNING: To reduce the risk of serious personal injury,

turn tool off and remove the battery pack before making any

adjustments or removing/installing attachments or accessories.

An accidental start-up can cause injury.

Installing and Removing the Battery Pack

(Fig. 7)

NOTE: Make sure your battery pack is fully charged.

FIG. 7

O

To install the battery pack into the tool handle, align the notch inside

the tool’s handle with the battery pack and slide the battery pack

firmly into the handle until you hear the lock snap into place.

To remove the battery pack from the tool, press the release buttons

(O) and firmly pull the battery pack out of the tool handle. Insert it into

the charger as described in the charger section of this manual.

Switch (Fig. 8)

LOCK-OFF BUTTON AND TRIGGER SWITCH

Your cut-off tool is

A

B

UNLOCKED

LOCKED

FIG. 8

equipped with a lock-off

button (B).

To lock the trigger

switch, press the lock-

off button as shown in

Figure8. When the lock-

off button is depressed

to the lock icon, the unit

is locked.

Always lock the trigger

switch when carrying

or storing the tool to

eliminate unintentional

starting.

To unlock the trigger switch, press the lock-off button. When the

lock-off button is depressed to the unlock icon, the unit is unlocked.

The lock-off button is colored red to indicate when the switch is in its

unlocked position.

Pull the trigger switch (A) to turn the motor ON. Releasing the trigger

switch turns the motor OFF.

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NOTE: This tool has no provision to lock the switch in the ON

position, and should never be locked ON by any other means.

WARNING: Hold the side handle and body of the tool firmly to

maintain control of the tool at start up and during use and until the

wheel or accessory stops rotating. Make sure the wheel has come to

a complete stop be fore laying the tool down.

WARNING: Allow the tool to reach full speed before touching tool

to the work surface. Lift the tool from the work surface before turning

the tool off.

SPINDLE LOCK (FIG. 2)

The spindle lock pin is provided to prevent the spindle from rotating

when installing or removing wheels. Operate the spindle lock pin only

when the tool is turned off, the battery is removed, and the wheel has

come to a complete stop.

NOTICE: To reduce the risk of damage to the tool, do not engage

the spindle lock while the tool is operating. Damage to the tool will

result and attached accessory may spin off possibly resulting in

injury.

To engage the lock, depress the spindle lock button (C) and rotate the

spindle until you are unable to rotate the spindle further.

Mounting and Using Depressed Center

Grinding Wheels and Sanding Flap Discs

CAUTION: Always use the correct guard per the instructions

in this manual.

MOUNTING AND REMOVING HUBBED WHEELS

Hubbed wheels install directly on the 5/8"-11 threaded spindle.

1. Thread the wheel on the spindle by hand.

2. Depress the spindle lock button and use a wrench to tighten the

hub of the wheel.

3. Reverse the above procedure to remove the wheel.

NOTICE: Failure to properly seat the wheel before turning the tool on

may result in damage to the tool or the wheel.

MOUNTING NON-HUBBED WHEELS (FIG. 9, 10)

Depressed center Type 27 grinding wheels must be used with

included flanges. See pages 14 and 15 of this manual for more

information.

1. Install the unthreaded backing flange (G) on spindle (D) with the

raised section (pilot) against the wheel.

FIG. 9

H

D

G

2. Place wheel against the backing flange, centering the wheel on

the raised section (pilot) of the backing flange.

3. While depressing the spindle lock button, thread the threaded

locking flange (H) on spindle. If the wheel you are installing is more

than 1/8" (3.17 mm) thick, place the threaded locking flange on

the spindle so that the raised section (pilot) fits into the center of

the wheel. If the wheel you are installing is 1/8" (3.17 mm) thick or

less, place the threaded locking flange on the spindle so that the

raised section (pilot) is not against the wheel.

4. While depressing the spindle lock button, tighten the threaded

locking flange with a wrench.

5. To remove the wheel, depress the spindle lock button and loosen

the threaded locking flange with a wrench.

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