DeWalt DW331 Instruction Manual

D WALT Industrial Tool Co., 701 East Joppa Road, Baltimore, MD 21286
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(OCT04) Form No. 586831-01
The following are trademarks for one or more D
scheme; the "D" shaped air intake grill; the array of pyramids on the handgrip; the kit box con-
figuration; 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
1-800-4-D
CALL US TOLL FREE AT:

General Safety Instructions

WARNING! Read and understand all instructions. Failure to follow all instruc-
tions 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
6 - 10 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 medica-
tion. A moment of inattention while operating power tools may result in serious personal injury.
DW331 Copyright © 2004 D
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WALT power tools: the yellow and black color
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WALT (1-800-433-9258)
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51-100 101-150
101-200 201-300
16 14
14 12
• 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, changing
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 mainte-
nance instructions may create a risk of electric shock or injury.
Additional Specific Safety Instructions for Jig Saws
• Hold tool by insulated gripping surfaces when performing an operation where the cut-
ting 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.
• Allow the motor to come to a complete stop before withdrawing the blade from the kerf
(the slot created by cutting). A moving blade may impact the workpiece causing a broken
blade, workpiece damage or loss of control and possible personal injury.
• Keep handles dry, clean, free from oil and grease. This will enable better control of the tool.
• Keep blades sharp. Dull blades may cause the saw to swerve or stall under pressure.
• Clean out your tool often, especially after heavy use. Dust and grit containing metal par-
ticles often accumulate on interior surfaces and could create an electric shock hazard.
• 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.
WARNING: Always wear eye protection while operating this power tool.
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-
WALT
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
WALT TOOL,
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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 microscop-
ic 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.
CAUTION: Wear appropriate hearing protection during use. Under some conditions and
duration of use, noise from this product may contribute to hearing loss.
• The label on your tool may include the following symbols. The symbols and their definitions
are as follows:
V ..................volts
Hz ................hertz
min ..............minutes
............direct current
................Class II Construction
................earthing terminal
................safety alert symbol
COMPONENTS
A. Trigger switch
B. Lock button
elim-
C. Speed control dial
D. Blade lever
E. Bevel lever
F. Shoe
G. Cutting action lever
Motor
Your D WALT tool is powered by a D
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the nameplate markings.
Volts 50/60 Hz or "AC only" means your tool must be operated only with alternating current and
never with direct current. Volts DC-60 Hz or AC/DC means your tool may be operated with either
alternating or direct current.
Voltage decrease of more than 10% will cause loss of power and overheating. All D
are factory tested; if this tool does not operate, check the power supply.
OPERATION
Trigger Switch (Fig. 1)
To start the jig saw, squeeze the trigger switch (A).
To slow and stop the jig saw, release the trigger switch.
For continuous operation, squeeze the trigger switch then depress the lock button (B). Once
lock button is depressed, release the trigger switch.
To release from continuous operation, squeeze the trigger and the lock will disengage.
Variable Speed Switch (Fig. 1, 2)
The variable speed is controlled in two ways: speed control dial (C) and the trigger switch (A).
SPEED CONTROL DIAL
By rotating the speed control dial (C) in either direction, the maximum speed or strokes-per-
minute at which the blade will cut is adjusted. The speed control dial adjusts the speed that the
blade will cut from approximately 500 SPM on speed A to approximately 3,100 SPM on speed F.
A....................amperes
W ..................watts
................alternating current
n o ..................no load speed
.../min............revolutions or
sfpm ..............surface feet per minute
H. Dust blower control
I. No-mar shoe cover
J. Anti-splinter insert
WALT-built motor. Be sure your power supply agrees with
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WALT tools
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