Additional Safety Rules For Mitre Saws; Residual Risks - DeWalt DCS781 Original Instructions Manual

Bent or warped workpieces can twist or shift and may cause binding on the spinning saw
blade while cutting. There should be no nails or foreign objects in the workpiece.
h ) Do not use the saw until the table is clear of all tools, wood scraps, etc., except
for the workpiece. Small debris or loose pieces of wood or other objects that contact the
revolving blade can be thrown with high speed.
i ) Cut only one workpiece at a time. Stacked multiple workpieces cannot be adequately
clamped or braced and may bind on the blade or shift during cutting.
j ) Ensure the mitre saw is mounted or placed on a level, firm work surface before
use. A level and firm work surface reduces the risk of the mitre saw becoming unstable.
k ) Plan your work. Every time you change the bevel or mitre angle setting, make
sure the fence will not interfere with the blade or the guarding system. Without
turning the tool "ON" and with no workpiece on the table, move the saw blade through
a complete simulated cut to assure there will be no interference or danger of cutting
the fence.
l ) Provide adequate support such as table extensions, saw horses, etc. for a
workpiece that is wider or longer than the table top. Workpieces longer or wider
than the mitre saw table can tip if not securely supported. If the cut‑off piece or workpiece
tips, it can lift the lower guard or be thrown by the spinning blade.
m ) Do not use another person as a substitute for a table extension or as additional
support. Unstable support for the workpiece can cause the blade to bind or the
workpiece to shift during the cutting operation pulling you and the helper into the
spinning blade.
n ) The cut‑off piece must not be jammed or pressed by any means against the
spinning saw blade. If confined, i.e. using length stops, the cut‑off piece could get
wedged against the blade and thrown violently.
o ) Always use a clamp or a fixture designed to properly support round material
such as rods or tubing. Rods have a tendency to roll while being cut, causing the blade
to "bite" and pull the work with your hand into the blade.
p ) Let the blade reach full speed before contacting the workpiece. This will reduce the
risk of the workpiece being thrown.
q ) If the workpiece or blade becomes jammed, turn the mitre saw off. Wait for
all moving parts to stop and disconnect the plug from the power source and/
or remove the battery pack. Then work to free the jammed material. Continued
sawing with a jammed workpiece could cause loss of control or damage to the mitre saw.
r ) After finishing the cut, release the switch, hold the saw head down and wait for
the blade to stop before removing the cut‑off piece. Reaching with your hand near
the coasting blade is dangerous.
s ) Hold the handle firmly when making an incomplete cut or when releasing the
switch before the saw head is completely in the down position. The braking action
of the saw may cause the saw head to be suddenly pulled downward, causing a risk
of injury.

Additional Safety Rules for Mitre Saws


WARNING: Do not allow familiarity (gained from frequent use of your saw) to replace
safety rules. Always remember that a careless fraction of a second is sufficient to inflict
severe injury.

WARNING: Never modify the power tool or any part of it. Damage or personal injury
could result.

WARNING: Do not insert battery into unit until complete instructions are read
and understood
• DO NOT OPERATE THIS MACHINE until it is completely assembled and installed according
to the instructions. A machine incorrectly assembled can cause serious injury.
• OBTAIN ADVICE from your supervisor, instructor, or another qualified person if you are not
thoroughly familiar with the operation of this machine. Knowledge is safety..
MAKE CERTAIN the blade rotates in the correct direction. The teeth on the blade should point
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in the direction of rotation as marked on the saw.
TIGHTEN ALL CLAMP HANDLES, knobs and levers prior to operation. Loose clamps can
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cause parts or the workpiece to be thrown at high speeds.
• AVOID UNCONTROLLED RELEASE OF THE SAW HEAD FROM FULLY DOWN POSITION.
Otherwise, there is a risk that the machine will tip over.
• BE SURE all blade and blade clamps are clean, recessed sides of blade clamps are against
blade and arbor screw is tightened securely. Loose or improper blade clamping may result in
damage to the saw and possible personal injury.
DO NOT OPERATE ON ANYTHING OTHER THAN THE DESIGNATED VOLTAGE for the
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saw. Overheating, damage to the tool and personal injury may occur.
• DO NOT WEDGE ANYTHING AGAINST THE FAN to hold the motor shaft. Damage to tool
and possible personal injury may occur.
• NEVER CUT FERROUS METALS or masonry. Either of these can cause the carbide tips to fly
off the blade at high speeds causing serious injury.
• NEVER HAVE ANY PART OF YOUR BODY IN LINE WITH THE PATH OF THE SAW BLADE.
Personal injury will occur.
• NEVER APPLY BLADE LUBRICANT TO A RUNNING BLADE. Applying lubricant could cause
your hand to move into the blade resulting in serious injury.
• DO NOT place either hand in the blade area when the saw is connected to the power source.
Inadvertent blade activation may result in serious injury.
• NEVER REACH AROUND OR BEHIND THE SAW BLADE. A blade can cause serious injury.
DO NOT REACH UNDERNEATH THE SAW unless it is unplugged and turned off. Contact
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with saw blade may cause personal injury.
• SECURE THE MACHINE TO A STABLE SUPPORTING SURFACE. Vibration can possibly
cause the machine to slide, walk, or tip over, causing serious injury.
• USE ONLY CROSSCUT SAW BLADES recommended for mitre saws. For best results, do not
use carbide tipped blades with hook angles in excess of 7 degrees. Do not use blades with
deep gullets. These can deflect and contact the guard, and can cause damage to the machine
and/or serious injury.
• USE ONLY BLADES OF THE CORRECT SIZE AND TYPE specified for this tool to prevent
damage to the machine and/or serious injury (complying with EN847:2017).
• MAXIMUM SPEED OF THE SAW BLADE shall always be greater than or at least equal to the
speed marked on the rating plate of the tool.
• THE SAW BLADE DIAMETER must be in accordance with the markings on rating plate of
the tool.
• INSPECT BLADE FOR CRACKS or other damage prior to operation. A cracked or damaged
blade can come apart and pieces can be thrown at high speeds, causing serious injury.
Replace cracked or damaged blades immediately.
• CLEAN THE BLADE AND BLADE CLAMPS prior to operation. Cleaning the blade and blade
clamps allows you to check for any damage to the blade or blade clamps. A cracked or
damaged blade or blade clamp can come apart and pieces can be thrown at high speeds,
causing serious injury.
• DO NOT USE WARPED BLADES. Check to see if the blade runs true and is free from vibration.
A vibrating blade can cause damage to the machine and/or serious injury.
DO NOT use lubricants or cleaners (particularly spray or aerosol) in the vicinity of the plastic
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guard. The polycarbonate material used in the guard is subject to attack by certain chemicals.
KEEP GUARD IN PLACE and in working order.
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• ALWAYS USE THE KERF PLATE AND REPLACE THIS PLATE WHEN DAMAGED. Small chip
accumulation under the saw may interfere with the saw blade or may cause instability of
workpiece when cutting.
• USE ONLY BLADE CLAMPS SPECIFIED FOR THIS TOOL to prevent damage to the machine
and/or serious injury.
• CLEAN THE MOTOR AIR SLOTS of chips and sawdust. Clogged motor air slots can cause the
machine to overheat, damaging the machine and possibly causing a short which could cause
serious injury.
• NEVER LOCK THE SWITCH IN THE "ON" POSITION. Severe personal injury may result.
NEVER STAND ON TOOL. Serious injury could occur if the tool is tipped or if the cutting tool
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is unintentionally contacted.
NEVER LEAVE TOOL RUNNING UNATTENDED. TURN POWER OFF. Don't leave tool until it
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comes to a complete stop.
• MAKE SURE to use the correct saw blade for the material to be cut.
DO NOT USE ABRASIVE WHEELS OR BLADES. The excessive heat and abrasive particles
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generated by them may damage the saw and cause personal injury.

WARNING: Cutting plastics, sap coated wood, and other materials may cause melted
material to accumulate on the blade tips and the body of the saw blade, increasing the
risk of blade overheating and binding while cutting.

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:

WARNING: Some dust created by power sanding, sawing, grinding, drilling, and other
construction activities contains chemicals known to the State of California 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.
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 disperse dust, which may cause serious
and permanent respiratory or other injury. Always use approved respiratory protection
appropriate for the dust exposure. Direct particles away from face and body.

WARNING: Always wear proper personal hearing protection during use. Under
some conditions and duration of use, noise from this product may contribute to
hearing loss.
• Be aware of the following factors influencing exposure to noise:
• Use saw blades designed to reduce the emitted noise,
• Use only well sharpened saw blades, and
• Use specifically designed noise‑reduction saw blades.
Air vents often cover moving parts and should be avoided. Loose clothes, jewelry or
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long hair can be caught in moving parts.

Residual Risks

The following risks are inherent to the use of saws:
• Injuries caused by touching the rotating parts.
In spite of the application of the relevant safety regulations and the implementation of safety
devices, certain residual risks cannot be avoided. These are:
• Impairment of hearing.
• Risk of accidents caused by the uncovered parts of the rotating saw blade.
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