DeWalt DW443 User Manual
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INSTRUCTION MANUAL
GUIDE D’UTILISATION
INSTRUCTIVO DE OPERACIÓN, CENTROS DE SERVICIO Y PÓLIZA
DE GARANTÍA. ADVERTENCIA: LÉASE ESTE INSTRUCTIVO ANTES
DE USAR EL PRODUCTO.
MANUAL DE INSTRUCCIONES
DW441, DW442, DW443, DW444
Right Angle Random Orbit Sanders
Ponceuses orbitales excentriques à angle droit
Lijadoras orbitales de movimiento múltiple de ángulo recto
IF YOU HAVE ANY QUESTIONS OR COMMENTS ABOUT THIS OR
ANY D
EWALT TOOL, CALL US TOLL FREE AT:
1-800-4-DEWALT (1-800-433-9258)
English
SHROUD
DUST BAG
SANDING PAD
(HOOK AND LOOP - DW442 AND DW443)
(PSA- PRESSURE SENSITIVE ADHESIVE - DW441 AND DW444)
ON/OFF SWITCH
R
1
SPEED CONTROL DIAL
(DW443 AND DW444)
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 out-
lets 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.
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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.
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 unex-
pected 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 bat-
tery 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 dan-
gerous in the hands of untrained users.
e) Maintain power tools. Check for misalignment or binding
of moving parts, breakage of parts and any other condi-
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tion 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 cut-
ting 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 accor-
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dance 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.
Special 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.
• Always wear eye protection and a respirator when sanding.
• Sanding of lead based paint is not recommended. See page 5
for additional precautions when sanding paint.
• Do not operate the unit without the dust shroud.
• 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.
• Clean out your tool often, especially after heavy use. Dust and
grit containing metal particles often accumulate on interior surfaces
and could create a risk of serious injury, electric shock or electrocution.
WARNING: Always use eye protection. All users and bystanders
must wear eye protection that conforms to ANSI Z87.1.
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, grind-
ing, 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, saw-
ing, 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.
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.
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FIG. 1 SANDING DISC
1
PAD
FIG. 2
SPEED CONTROL DIAL
(SETTINGS 1 - 5)
FIG. 3
ON
OFF
• 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
....... direct current
...........Class I Construction .............earthing terminal
............... (grounded)
............ Class II Construction …/min....... revolutions or
............... (double insulated) .................reciprocation
BPM .......beats per minute .................per minute
............alternating current
n
o .............no load speed
.............safety alert symbol
SAVE THESE INSTRUCTIONS
FOR FUTURE USE
Motor
Be sure your power supply agrees with nameplate marking. 120 AC
means your tool may be operated only with alternating current and
never with direct current. Voltage decrease of more than 10% will
cause loss of power and overheating. All tools are factory tested; if
this tool does not operate, check the power supply.
Attaching Sanding Discs
Your sander is designed to use 6" sanding discs with the 6 hole dust
extraction pattern.
Hook and Loop (DW442 and DW443)
PSA - Pressure Sensitive Adhesive (DW441 and DW444)
To attach paper to the sanding pad:
1. Turn off and unplug tool.
2. Turn the sander over so that the sanding pad is facing upward.
3. (DW441 and DW444 only) Clean dust from vinyl pad face.
4. Hold the pad with one hand to keep it from rotating.
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FIG. 5
FIG. 4
PAD
TORX HEAD
SCREWS
CFS DISC
ALIGN NOTCHES
TO THOSE IN
SHROUD
FIG. 6
5. With the other hand, align the holes and place the disc directly on
top of the pad (see Fig. 1).
Switch (Fig. 2)
To turn the unit on, slide the switch forward (the symbol “I” will be
visible.) To turn the unit off, slide the switch back (the symbol “O” will
be visible). Before plugging in the unit, make sure the switch is in the
off position.
Speed Control Dial (DW443 & DW444 Only)
The speed control dial (5 incremental settings) allows you to increase
or decrease speed from 4000 - 6800 orbits per minute. The optimal
speed setting for each application is very much dependent on personal preference. You may want to experiment on a piece of scrap to
determine what gives you the best combination of finish quality and
material removal rate for your application. Generally, you will want to
use a higher setting on harder materials and a lower setting on softer
materials. Material removal rate increases as speed increases.
Dust Collection
Your sander comes equipped with a cloth filter bag to collect the
dust generated during sanding. To empty the dust bag, first turn off
and unplug tool. Firmly pull the bag off while holding the rubber boot
(Fig. 3). Empty the bag (you may want to turn it inside out.)
NOTE: Never operate this tool unless the dust collection bag is in
place.
Replacing Sanding Pad (Fig. 4)
When the pad becomes worn out, use the following procedure to
replace pad.
1. Turn off and unplug tool.
2. Remove 4 torx head screws from the bottom of the tool and
remove the pad.
3. Replace the pad and screws, making sure the CFS disc is aligned
properly.
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Operation
To operate your sander, grasp it as shown in Figure 5 and turn it
on. Move the unit in long, sweeping strokes along the surface being
sanded, letting the sander do the work.
NOTE: Excessive downward pressure on the tool while sanding actually slows the removal rate and produces an inferior quality surface.
A side handle has been provided with your unit and can be used if
desired. The side handle can be screwed into either side of tool by
first removing the plastic screw, as shown in Figure 6.
NOTE: Be sure to check your work often, this sander is capable of
removing material rapidly, especially with coarse paper.
The random orbital action of your sander allows you to sand with
the grain or at any angle across it for most sanding jobs. To produce
the best finish possible, start with coarse grit sandpaper and change
gradually to finer and finer paper. Vacuum and wipe surface with a
tack cloth between grit steps.
The rate at which the dust bag fills up will vary with the type of material
being sanded and the coarseness of the sandpaper. For best results,
empty the bag frequently.
When sanding painted surfaces, (see additional precautions when
sanding paint) you may find that the sandpaper loads up and clogs
with paint. A heat gun will work much better to remove paint before
sanding. FOLLOW ALL SAFETY INSTRUCTIONS IN HEAT GUN
INSTRUCTION MANUAL.
NOTE: (DW441 and DW444 only): When using PSA sanding discs, it
is necessary to remove the disc soon after operation. PSA papers, if
left on during tool storage, sometimes become difficult to remove. To
aid in the removal of old PSA paper, sand for a few minutes to soften
adhesive backing prior to changing disc.
Precautions To Take When Sanding
Paint
1. Sanding of lead based paint is NOT RECOMMENDED due to the
difficulty of controlling the contaminated dust. The greatest danger
of lead poisoning is to children and pregnant women.
2. Since it is difficult to identify whether or not a paint contains lead
without a chemical analysis, we recommend the following precautions when sanding any paint:
PERSONAL SAFETY
a. No children or pregnant women should enter the work area where
the paint sanding is being done until all clean up is completed.
b. A dust mask or respirator should be worn by all persons entering
the work area. The filter should be replaced daily or whenever the
wearer has difficulty breathing.
NOTE: Only those dust masks suitable for working with lead paint
dust and fumes should be used. Ordinary painting masks do not
offer this protection. See your local hardware dealer for the proper
N.I.O.S.H. approved mask.
c. NO EATING, DRINKING or SMOKING should be done in the
work area to prevent ingesting contaminated paint particles.
Workers should wash and clean up BEFORE eating, drinking or
smoking. Articles of food, drink, or smoking should not be left in
the work area where dust would settle on them.
ENVIRONMENTAL SAFETY
a. Paint should be removed in such a manner as to minimize the
amount of dust generated.
b. Areas where paint removal is occurring should be sealed with
plastic sheeting of 4 mils thickness.
c. Sanding should be done in a manner to reduce tracking of paint
dust outside the work area.
CLEANING AND DISPOSAL
a. All surfaces in the work area should be vacuumed and thoroughly
cleaned daily for the duration of the sanding project. Vacuum filter
bags should be changed frequently.
b. Plastic drop cloths should be gathered up and disposed of along
with any dust particles or other removal debris. They should be
placed in sealed refuse receptacles and disposed of through regular trash pick-up procedures.
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During clean up, children and pregnant women should be kept
away from the immediate work area.
c. All toys, washable furniture and utensils used by children should
be washed thoroughly before being used again.
Application Notes
SANDPAPER - GRIT TYPES
Natural Abrasives
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Flint is the softest (Mohs’ Scale* 7) of the common natural abrasives.
It has a tan color and is very inexpensive.
Garnet paper is harder than flint (Mohs’ Scale 7.5) and is easily
identified by its bright orange color. Even though it is not the hardest, the way the abrasive fractures gives you a good cutting edge for
woodworking.
Emery, even though harder than garnet (Mohs’ Scale 9), has blunt
edges making it a poor sanding abrasive. Its primary use is for polishing metal.
* Mohs’ Scale is the mineral hardness scale. It rates diamond at 15,
the hardest, and talc at 1.
Manufactured Abrasives
White Aluminum Oxide (AlO) is extremely hard (Mohs’ Scale 12) and
durable which makes it a great abrasive for use with the Random Orbit
Sander. “White” describes the particular way the abrasive is manufactured, not its color. This abrasive is widely available and comes in a
variety of colors due to the increasing use of dyes. Stearate lubricants
on the paper also enhance performance by reducing heat and the rate
at which the paper clogs.
Silicon Carbide (SiC) is the hardest abrasive (Mohs’ Scale 13) commonly available next to industrial diamond but is not as tough as
Aluminum Oxide abrasives. This abrasive easily fractures and provides sharp faces to the work throughout the life of the sanding paper.
This “self-sharpening” feature makes SiC an outstanding abrasive for
material removal but limits its life.
OPEN COAT VERSUS CLOSED COAT
Abrasives are applied to the paper with glue. When the grit is large
(say 60 or 80 grit) the percent of coverage is usually reduced to 60%
to 70% of the backing paper surface.This increases the life of the
paper by reducing the rate at which the paper clogs. This is called an
open coat and almost the only way you can buy sandpaper in heavier
grits. With finer grits the grit is applied at rates of 90% or more and
are labeled closed coat. Since the dust particle is much smaller the
tendency of the paper to load up and clog is greatly reduced.
GRIT SIZES
There are several grading systems used. The system most popular
today is sieve size. The number on the back of your sandpaper disc
refers to the screen size the particle can pass through. 120 grit paper
for example will sift through a screen with 120 holes per linear inch.
Every square inch of screen has 14,400 holes (120 x 120). The higher
the number the finer the particle size. Common sizes are from 36 to
600 with the recent introduction of grit sizes up to 1200.
PAPER AND FILM: THE BACKING
Paper: The material most commonly used to carry the abrasive is
paper. Paper is graded by weight. “A” weight paper which is the most
prevalent is the lightest paper used and gives good durability and
flexibility in most sanding applications. Other paper weights that are
available are C, D, E, and F weight. The disadvantage of paper is its
low mechanical stiffness. Since the paper fiber gives during sanding,
the abrasive doesn’t stand up and some of the cutting edges do not
engage the work. The advantage is cost.
Film: Film backed sanding discs address the disadvantage of paper.
The film is mechanically stiffer than paper. Film is also more expensive but when all other things are held constant improves the cutting
performance of the abrasive.
Cloth and Vulcanized Fiber: These backings are typically hard to
find and are used in specialty applications. Most sandpaper you will
use will have the paper or film backing.
7
HOOK AND LOOP AND PSA: WHAT HOLDS THE SANDING
DISK TO THE PAD.
Hook & Loop: The sanding disk as backed with a fabric nap (loops)
that interlocks with a grid of posts (hooks) on the sander’s pad. The
advantages are paper reusability and cooler interface between paper
and work.
PSA: Pressure Sensitive Adhesive is applied to the back of the sanding disc and adheres to the sanding pad (Not the same pad that carries Hook & Loop paper). The advantage is cost. The major disadvantage is the tendency of PSA backed papers to adhere permanently
to the pad if left on after sanding. Why does this happen? The main
culprit is heat. During sanding the pad and paper heat up. This causes
the adhesive to flow into all the ridges on the vinyl pad and form a tight
bond. If you remove the paper soon after you are finished sanding
you don’t allow the adhesive to set. If you leave it on for a couple of
days the adhesive sets and has more strength than the paper carrier,
causing the paper to tear and leaving you with a difficult clean up job.
One more disadvantage: If you do small sanding jobs and don’t wear
out the paper you cannot reuse it and tend to waste more paper.
SANDING
THE BASIC RULES:
Always start with the coarsest grit first. Don’t break this rule. The
scratches get smaller as the grit number gets larger and the quality
of the finish generally improves. When you change grits be particular
about cleaning the surface that you are finishing. An 80 grit particle
floating on your work under your 220 grit paper will leave 80 grit
scratches. The best way to avoid this is to vacuum the work and then
carefully wipe down the work with a tack rag.
The random orbit sander action is equally applied across the grain
and with the grain. Since the scratch mark is small and random in all
directions, the ability of the eye to see a scratch is greatly reduced.
Always wear a mask to avoid breathing the dust. NEVER BREAK
THIS RULE. We have engineered the tool to collect a majority of the
dust created in the sanding process but the tool does not capture it
all. To improve the capture rate use a vacuum but ALWAYS wear a
dust mask.
SOME OTHER HINTS FOR A BETTER FINISH
A random orbit sander is much more aggressive than other similarly
sized orbital tools so you may want to consider the next finer grit when
you start to sand your project.
Since the random orbit action makes a short scratch, you may find
that a project doesn’t require as many grit steps. A lot of professional
cabinet makers only use 80, 120, and 150 grit on their work with
satisfactory results. If in doubt about how the finish will take to your
sanded surface, wipe the surface with some paint thinner. Defects will
show up darker than the surrounding wood.
Careful inspection of the work prior to the finishing operation may
reveal dents. Try to correct these problems by raising the dent
(a hot iron and wet rag will do this) or carefully sand a large area
around the dent. If you vigorously sand the dent, you may create a
cupped surface.
When you are satisfied with the sanding job and you have finished
sanding with your finest grit, raise the grain by dampening the wood
with a wet rag. When the wood has dried and you are ready to apply
the finish, resand lightly to take off the wood fibers raised by the water.
Vac and tack the surfaces and immediately apply the first coat of finish
before the wood gets dirty.
WOOD: Some important characteristics of wood
Hard grain and soft grain
Wood has hard grain and soft grain. Hard grain is typically the
product of summer growth and soft grain the product of spring. All
sanders will remove more soft grain than hard grain and since the
random orbit sander is more aggressive, it will remove it that much
more quickly. Extended sanding on a piece of fir for example, will
produce a noticeably uneven finish. This is a good reason to correct
flaws before sanding.
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MAINTENANCE
WARNING: To reduce the risk of injury, turn unit off and
disconnect machine from power source before installing and
removing accessories, before adjusting or changing set-ups or
when making repairs. An accidental start-up can cause injury.
Lubrication
Self lubricating bearings are used in the tool and periodic relubrication
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is not required. However, it is recommended that, once a year, you
take or send the tool to a service center for a thorough cleaning and
inspection.
Cleaning
WARNING: Never use solvents or other harsh chemicals for cleaning the non-metallic parts of the tool. These chemicals may weaken
the plastic materials used in these parts. Use a cloth dampened only
with water and mild soap. Never let any liquid get inside the tool; never
immerse any part of the tool into a liquid.
WARNING: Always use eye protection. All users and bystanders
must wear eye protection that conforms to ANSI Z87.1.
Keep your machine as clean as possible by wiping with a clean cloth
and blowing through it with air after every 5 hours of use. If you typically wrap the cord around the tool when you store it, leave a generous loop of cord such that the strain relief does not bend. This helps
prevent premature cord failure.
Accessories
WARNING: Since accessories, other than those offered by
EWALT, have not been tested with this product, use of such acces-
D
sories with this tool could be hazardous. To reduce the risk of injury,
EWALT recommended accessories should be used with this
only D
product.
Recommended accessories for use with your tool are available at
extra cost from your local dealer or authorized service center. If you
need assistance in locating any accessory for your tool, please con-
EWALT Industrial Tool Co., 701 East Joppa Road, Baltimore,
tact D
MD 21286, call 1-800-4-D
site www.dewalt.com.
EWALT (1-800-433-9258) or visit our web-
Repairs
To assure product SAFETY and RELIABILITY, repairs, maintenance
and adjustment (including brush inspection and replacement) should
be performed by a D
rized service center or other qualified service personnel. Always use
identical replacement parts.
EWALT factory service center, a DEWALT autho-
Three Year Limited Warranty
DEWALT will repair, without charge, any defects due to faulty materials or workmanship for three years from the date of purchase. This
warranty does not cover part failure due to normal wear or tool
abuse. For further detail of warranty coverage and warranty repair
information, visit www.dewalt.com or call 1-800-4-D
433-9258). This warranty does not apply to accessories or damage
caused where repairs have been made or attempted by others. This
warranty gives you specific legal rights and you may have other rights
which vary in certain states or provinces.
In addition to the warranty, D
EWALT will maintain the tool and replace worn parts caused by nor-
D
mal use, for free, any time during the first year after purchase.
90 DAY MONEY BACK GUARANTEE
If you are not completely satisfied with the performance of your
EWALT Power Tool, Laser, or Nailer for any reason, you can return
D
it within 90 days from the date of purchase with a receipt for a full
refund – no questions asked.
LATIN AMERICA: This warranty does not apply to products sold in
Latin America. For products sold in Latin America, see country specific warranty information contained either in the packaging, call the
local company or see website for warranty information.
EWALT tools are covered by our:
1 YEAR FREE SERVICE
EWALT (1-800-
9
FREE WARNING LABEL REPLACEMENT: If your warning labels
become illegible or are missing, call 1-800-4-D
replacement.
EWALT for a free
XXX
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