Minimum Gauge for Cord Sets
Volts
Total Length of Cord in Feet
120V
0-25
26-50
51-100
101-150
240V
0-50
51-100
101-200
201-300
Ampere Rating
More
Not more
AWG
Than Than
0
-
6
18
16
16
14
6
-
10
18
16
14
12
10
-
12
16
16
14
12
12
- 16
14
12
Not Recommended
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 toolsmay
result in serious personal injury.
b) Use safety equipment. Always wear eye protection.
Safety equipment such as
dust mask, non-skid safety shoes, hard hat, or hearing protection used for appropriate
conditions will reduce personal injuries.
c) Avoid accidental starting. Ensure the switch is in the off-position before plugging
in.
Carrying power tools with your finger on the switch or plugging in 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 jewellery. Keep your hair, clothing
and gloves away from moving parts.
Loose clothes, jewellery or long hair can be caught
in moving parts. Air vents often cover moving parts and should also be avoided.
g) If devices are provided for the connection of dust extraction and collection facilities,
ensure these are connected and properly used.
Use of these devices 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 tools 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 and in the manner intended for the particular type of power tool, 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) 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.
Additional Specific Safety Instructions For Sanders
• Hold power tools by insulated gripping surfaces when performing an operation
where the cutting tool may contact hidden wiring or its own cord.
Contact with a “live”
wire will make exposed metal parts of the tool “live” and shock the operator.
• Do not sand metal of any kind with your sander.
Sparks may be generated by sanding
screws, nails or other metals which may ignite dust particles.
• Do not wet sand with this sander.
Liquids may enter the motor housing and cause electric
shock.
• Empty dust bag frequently. Especially when sanding resin coated surfaces such as
polyurethane, varnish, shellac, etc.
The accumulation of fine sanding dust particles may
self ignite and cause fire.
• Do not operate this tool for long periods of time.
Vibration caused by the operating action
of this tool may cause permanent injury to fingers, hands, and arms. Use gloves to provide
extra cushion, take frequent rest periods, and limit daily time of use.
• Sanding of lead-based paint, chemically pressure treated lumber or other materials
that may contain carcinogens is not recommended.
Sanding of these materials should
only be performed by a professional.
• Clean out your tool often, especially after heavy use.
Dust and grit containing metal par-
ticles often accumulate on interior surfaces and could create a risk of serious injury, electric
shock or electrocution.
ALWAYS
disconnect the sander from the power source before clean-
ing.
ALWAYS WEAR SAFETY GLASSES
that conform to ANSI Z87.1.
•
ALWAYS disconnect tool from the power source before changing abrasive belts,
sheets or discs.
Such preventive safety measures reduce the risk of starting the power tool
accidentally.
• Replace worn CFS disc when it causes high tool rpm.
High tool rpm caused by a worn
out CFS disc may result in separation of sanding pad from the sander, possibly causing per-
sonal injury. for instructions on replacing the CFS disc, see the section of this manual titled
“Tool Care.”
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: 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:
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 (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 promote
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. The symbols and their definitions
are as follows:
V ....................volts A
....................amperes
Hz ..................hertz W
...................watts
min ................minutes
.................alternating current
.............direct current
no ..................no load speed
Definitions: 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
.
CAUTION:
Used without the safety alert symbol indicates a poten-
tially hazardous situation which, if not avoided,
may
result in
property
damage
.
IF YOU HAVE ANY QUESTIONS OR COMMENTS ABOUT THIS OR ANY D
E
WALT TOOL,
CALL US TOLL FREE AT:
1-800-4-D
E
WALT (1-800-433-9258)
General Safety Rules
WARNING!
Read all instructions. Failure to follow all instructions listed below
may result in electric shock, fire and/or serious injury. The term “power tool” in all
of the warnings listed below refers to your mains-operated (corded) power tool or
battery-operated (cordless) power tool.
SAVE THESE INSTRUCTIONS
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. Replace or repair damaged cords.
Make sure your extension cord is in good condition. Use only 3-wire extension cords that
have 3-prong grounding-type plugs and 3-pole receptacles that accept the tool’s plug.
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. 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 gauge. The smaller the
gauge number, the heavier the cord.
INSTRUCTION MANUAL
GUIDE D'UTILISATION
MANUAL DE INSTRUCCIÓNES
DW421
Random Orbit Palm Sander
Ponceuse des finition orbitale excentrique
Lijadorae des órbita aleatoria
INSTRUCTIVO DE OPERACIÓN, CENTROS DE SERVICIO
Y PÓLIZA DE GARANTÍA.
ADVERTENCIA:
LÉASE ESTE
INSTRUCTIVO ANTES DE USAR EL PRODUCTO.
D
E
WALT Industrial Tool Co., 701 East Joppa Road, Baltimore, MD 21286
(AUG07) Form No. 655380-00 DW421 Copyright © 2002, 2007 D
E
WALT
The following are trademarks for one or more D
E
WALT power tools: the yellow and black
color scheme; 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 questions or comments, contact us.
Pour toute question ou tout commentaire, nous contacter.
Si tiene dudas o comentarios, contáctenos.
1-800-4-D
E
WALT • www.dewalt.com
