Work Area; Electrical Safety; Personal Safety - DeWalt DW251 Manual De Instrucciones

D WALT Industrial Tool Co., 701 East Joppa Road, Baltimore, MD 21286
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(OCT04-CD-1) Form No. 626760-00
The following are trademarks for one or more D
the "D" shaped air intake grill; the array of pyramids on the handgrip; the kit box configuration; and the
array of lozenge-shaped humps on the surface of the tool.
IF YOU HAVE ANY QUESTIONS OR COMMENTS ABOUT THIS OR ANY D
CALL US TOLL FREE AT: 1-800-4-DEWALT (1-800-433-9258)
General Safety Rules
WARNING! READ AND UNDERSTAND ALL INSTRUCTIONS. Failure to
follow all instructions listed below may result in electric shock, fire and/or serious
personal injury.
SAVE THESE INSTRUCTIONS

WORK AREA

• Keep your work area clean and well lit. Cluttered benches and dark areas invite accidents.
• Do not operate power tools in explosive atmospheres, such as in the presence of flam-
mable liquids, gases, or dust. Power tools create sparks which may ignite the dust or
fumes.
• Keep bystanders, children, and visitors away while operating a power tool. Distractions
can cause you to lose control.

ELECTRICAL SAFETY

• Grounded tools must be plugged into an outlet properly installed and grounded in
accordance with all codes and ordinances. Never remove the grounding prong or
modify the plug in any way. Do not use any adaptor plugs. Check with a qualified elec-
trician if you are in doubt as to whether the outlet is properly grounded. If the tools
should electrically malfunction or break down, grounding provides a low resistance path to
carry electricity away from the user. Applicable only to Class I (grounded) tools.
• 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
inates the need for the three wire grounded power cord and grounded power supply system.
Applicable only to Class II (double insulated) tools.
• 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. When
using an extension cord, be sure to use one heavy enough to carry the current your product
will draw. An undersized cord will cause a drop in line voltage resulting in loss of power and
overheating. The following table shows the correct size to use depending on cord length and
nameplate ampere rating. If in doubt, use the next heavier gage. The smaller the gage num-
ber, the heavier the cord.
Minimum Gage for Cord Sets
Volts Total Length of Cord in Feet
120V 0-25 26-50
240V 0-50 51-100
Ampere Rating
More Not more AWG
Than Than
0 - 6 18 16

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.
DW660 Copyright © 2000, 2004 D
WALT power tools: the yellow and black color scheme;
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WALT TOOL,
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51-100 101-150
101-200 201-300
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• Dress properly. Do not wear loose clothing or jewelry. Contain long hair. Keep your hair,
clothing, and gloves away from moving parts. Loose clothing, jewelry, or long hair can be
caught in moving parts. Air vents often cover moving parts and should also be avoided.
• 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 bal-
ance enables better control of the tool in unexpected situations.
• Use safety equipment. Always wear eye protection. Dust mask, non-skid safety shoes,
hard hat, or hearing protection must be used for appropriate conditions.
TOOL USE AND CARE
• Use clamps or other practical way to secure and support the workpiece to a stable
platform. Holding the work by hand or against your body is unstable and may lead to loss of
control.
• Do not force tool. Use the correct tool for your application. The correct tool will do the
job better and safer at the rate for which it is designed.
• Do not use tool if switch does not turn it on or off. Any tool that cannot be controlled with
the switch is dangerous and must be repaired.
• Disconnect the plug from the power source before making any adjustments, chang-
ing accessories, or storing the tool. Such preventative safety measures reduce the risk of
starting the tool accidentally.
• Store idle tools out of reach of children and other untrained persons. Tools are dan-
gerous in the hands of untrained users.
• Maintain tools with care. Keep cutting tools sharp and clean. Properly maintained tools,
with sharp cutting edges are less likely to bind and are easier to control.
• Check for misalignment or binding of moving parts, breakage of parts, and any other
condition that may affect the tool's operation. If damaged, have the tool serviced
before using. Many accidents are caused by poorly maintained tools.
• Use only accessories that are recommended by the manufacturer for your model.
Accessories that may be suitable for one tool, may become hazardous when used on
another tool.
SERVICE
• Tool service must be performed only by qualified repair personnel. Service or mainte-
nance performed by unqualified personnel could result in a risk of injury.
• When servicing a tool, use only identical replacement parts. Follow instructions in the
Maintenance section of this manual. Use of unauthorized parts or failure to follow
Maintenance Instructions may create a risk of electric shock or injury.
Additional Specific Safety Instructions for Cut-Out Tools
• Hold tool by insulated gripping surfaces when performing an operation where the tool
may contact hidden wiring or its own cord. Contact with a "live" wire will make exposed
metal parts of the tool "live" and shock the operator.
WARNING: After changing bits or making any adjustments, make sure the collet nut is
securely tightened to avoid injury.
WARNING: Do not press spindle lock or collet lock buttons while motor is running. The oper-
ator may lose control and drop the tool. Personal injury or serious tool damage may result.
WARNING: Shut off all live electric circuits to any areas where cut outs will be made, to avoid
fire or serious personal injury.
CAUTION: Wear appropriate personal hearing protection during use. Under some con-
ditions and duration of use, noise from this product may contribute to hearing loss.
CAUTION: Do not touch the bit or collet nut during or immediately after cutting material. The
bit and collet nut may be hot enough to burn bare skin.
• Always wear eye protection. Dust mask or hearing protection must be used for appropri-
ate conditions. Using personal safety devices is recommended. WORK SAFE.
• Always operate the tool with the depth guide in place. The guide keeps the bit from
plunging too deeply through the material. A minimum of penetration should be maintained to
WALT
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eliminate the danger of cutting into electric wiring.
• Do not use this tool with drill or screwdriver bits. This tool is not intended to be used as
a drill or screwdriver.
• Be sure your cutting bits are sharp and in good condition. Damaged bits can cause the
tool to jump, injuring the operator.
• Be sure that the motor has stopped completely before you lay the cut-out tool down. If
the cutter head is still spinning when the tool is layed down, it could cause injury or damage.
• Be sure that the cutting bit is clear of the workpiece before starting motor. If the bit is
in contact with the workpiece when the motor starts it could make the tool jump, causing
damage or injury.
• If your tool fails to function properly, take it to an authorized service center. There are
no user serviceable parts inside this tool and it should only be opened by trained service
personnel.
WARNING: Some dust created by power sanding, sawing, grinding, drilling, and other con-
struction activities contains chemicals known to cause cancer, birth defects or other reproduc-
tive 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 (CCA).
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 soap and water. Allowing dust to get into your mouth, eyes, or lay on the skin may pro-
mote absorption of harmful chemicals.
WARNING: Use of this tool can generate and/or disburse 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.
• The label on your tool may include the following symbols.
elim-
V ......................volts
Hz ....................hertz
min ..................minutes
..................direct current
......................Class II Construction
....................safety alert symbol
To Maintain Safe Tool Control
• Make sure the work surface is free of nails or screws. Cutting into a nail or screw may
cause the tool to jump, damaging the bit.
• Never operate the tool with one hand while holding the workpiece with the other hand.
Always clamp the material and guide the tool with both hands.
• Do not cut material lying on a hard surface. Clearance behind material to be cut must be
allowed for protruding bit.
• Disconnect plug from power supply before making adjustments, changing bits or cleaning
tool.
• Do not start the tool with bit engaged in the material. The bit may grab the material.
Motor
Be sure your power supply agrees with nameplate marking. 120 volts AC means your tool may
be operated only with alternating current and never with direct current.
Switch
To start the motor, slide the switch (A) to "I" position. To stop the motor, slide the switch to "O"
position (Fig. 1).
Installing and Removing the Bit (Fig. 2)
This tool has a tool-free bit change system. To change bits, FIRST turn off the tool and discon-
nect from power supply. Remove the guide.
A ......................amperes
W......................watts
....................alternating current
n o ....................no load speed
......................earthing terminal
.../min ..............revolutions per minute