DeWalt D28770 Guide D'utilisation

624781-00,D28770 4/15/04 4:24 PM Page 1
D WALT Industrial Tool Co., 701 East Joppa Road, Baltimore, MD 21286
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(APR04) Form No. 624781-00 D28770
The following are trademarks for one or more D WALT power tools: the yellow and black color scheme; the "D" shaped
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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-D WALT (1-800-433-9258)
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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 acci-
dents.
• 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.
• 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
electrician 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.
• 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 dam-
aged 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 prod-
uct 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 number, the heavier the cord.
Minimum Gage for Cord Sets
Volts Total Length of Cord in Feet
120V 0-25 26-50 51-100
240V 0-50 51-100 101-200
Ampere Rating
More Not more AWG
Than Than
0 - 6 18 16 16
6 - 10 18 16 14
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 per-
sonal injury.
• 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 main-
tenance 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 Safety Rules - Portable Band Saws
• Hold tool by insulated gripping surfaces when performing an operation where the
cutting tool may contact hidden wiring. Contact with a "live" wire will make exposed
metal parts of the tool "live" and shock the operator.
• Keep hands away from cutting area and blade. Keep one hand on the main handle and
the other hand on the front handle to prevent loss of control which could result in personal
injury.
• Always make sure the portable band saw is clean before using
• Always cease operation at once if you notice any abnormality whatsoever.
• Always be sure all components are mounted properly and securely before using tool.
• Always handle the band saw blade with care when mounting or removing it.
• Always keep your hands out of the line of the band saw blade.
• Always wait until the motor has reached full speed before starting a cut.
• Always keep handles dry, clean, and free of oil and grease. Hold the tool firmly when in use.
• Always be alert at all times, especially during repetitive, monotonous operations. Always be
sure of position of your hands relative to the blade.
• Never remove material guide.
• Stay clear of end pieces that may fall after cutting off. They may be hot, sharp and/or heavy.
Serious personal injury may result.
WARNING: DO NOT modify and/or use this tool for any application other than for which it
was designed.
WARNING: Exercise extreme caution when cutting blind into conduit and pipe. Be sure the
object being cut does not contain electrical wires, gases, or water, etc., which could create haz-
ardous conditions causing personal injury and property damage.
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
Copyright © 2004
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 pro-
tection 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
WALT TOOL,
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are as follows:
V ..............volts
Hz ............hertz
min ..........minutes
........direct current
............Class II Construction
............safety alert symbol
sfpm ........surface feet per minute
COMPONENTS (FIG. 1, 2)
A. Auxiliary handle
B. Sight light
C. Trigger switch
D. Main handle
E. Material guide
F. Guide rollers
G. Guide roller adjustment
H. Blade tension lever
ASSEMBLY
Blades
This portable band saw is setup for use with .020" (0.5 mm) thick, 1/2" (12.5 mm) wide and
44-7/8" (1140 mm) long blades. To use .025 (.64 mm) thick blades, please contact an author-
ized D WALT service center.
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CAUTION: The use of any other blade or accessory might be hazardous. DO NOT use any
other type of accessory with your band saw. Blades used on stationary band saws are of
different thickness. Do not attempt to use them on your portable unit.
Blade Selection
In general, first consider the size and shape of the work, and the type of material to be cut.
Remember, for the most efficient cutting, the coarsest tooth blade possible should be used in a
given application, because the coarser the tooth, the faster the cut. In selecting the appropriate
number of teeth per inch of the band saw blade, at least two teeth should contact the work sur-
face when the blade is rested against the workpiece. As a rule of thumb, soft materials usually
require coarse tooth blades, while hard materials require fine tooth blades. Where a smoother
finish is important, select one of the finer tooth blades.
Select the appropriate band saw blade according to the material type, dimensions, and num-
ber of teeth. See Blade Description chart.
101-150 CAUTION: The following table is intended as a general guide only. Determine the type of
material and dimension of the workpiece and select the most appropriate band saw blade.
201-300
CAUTION: Never use the band saw to cut resin materials which are subject to melting.
Melting of resin material caused by high heat generated during cutting may cause the band saw
blade to become bound to the material, possibly resulting in overload and burn-out of the motor.
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Type of band saw blade
Workpiece thickness
Blade Speed
Your D28770 portable band saw is equipped with variable speed for greater versatility.
Turn the speed knob (I) to select the desired speed (Fig. 1).
When cutting copper, brass, bronze, aluminum, cast iron, angle iron, and mild steel, use a
higher speed. Rotate the speed knob to a higher speed .
When cutting plastic pipe, tougher steels, chrome steel, tungsten steel, stainless steel, and
other problem materials, use low speed. Rotate the speed knob to a lower speed.
NOTE: When cutting plastic pipe, higher speeds may melt plastic.
Removing and Installing Blades
CAUTION: Turn off and unplug the tool before making any adjustments or removing/
installing attachments or accessories.
CAUTION: Blade tension lever is under spring pressure. Maintain control of lever when
releasing blade tension.
TO REMOVE BLADE (FIG. 1, 2)
1. Rotate the blade tension lever (H) clockwise until it stops to release tension in blade.
2. Turn the saw over and place it on a workbench or table with the cord to the left.
3. Begin removing the blade at the blade guard (M) and continue around the pulleys (L).
When removing the blade, tension may be released and the blade may spring free. SAW
BLADES ARE SHARP. USE CARE IN HANDLING THEM.
A ..........amperes
W ........watts
......alternating current
n o ........no load speed
........earthing terminal
.../min ..revolutions per minute
SAVE THESE INSTRUCTIONS
I. Speed knob
J. Rubber bumpers
K. Hang hook
L. Pulley
M. Blade guard
N. Rubber tires
O. Blade
P. Sight light switch
BLADE DESCRIPTION
Bi-Metal
Number of teeth 24 18 14 10 14/18 10/14
1/8" and under • •
1/8"- 1/4" • •
1/4" - 13/32" •
13/32" and over •
•