Personal Safety; Additional Safety Rules For Mitre Saws - DeWalt DW743N Series Original Instructions Manual

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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 tools
may result in serious personal injury.
b ) Use personal protective equipment. Always wear eye protection. Protective
equipment such as a dust mask, non-skid safety shoes, hard hat or hearing protection
used for appropriate conditions will reduce personal injuries.
c ) Prevent unintentional starting. Ensure the switch is in the off-position before
connecting to power source and/or battery pack, picking up or carrying the tool.
Carrying power tools with your finger on the switch or energising 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 and
clothing away from moving parts. Loose clothes, jewellery or long hair can be caught
in moving parts.
g ) If devices are provided for the connection of dust extraction and collection
facilities, ensure these are connected and properly used. Use of dust collection can
reduce dust-related hazards.
h ) Do not let familiarity gained from frequent use of tools allow you to become
complacent and ignore tool safety principles. A careless action can cause severe
injury within a fraction of a second.
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 remove the battery pack,
if detachable, 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 and accessories. Check for misalignment or binding of
moving parts, breakage of parts and any other condition that may affect the
power tool's 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, 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.
h ) Keep handles and grasping surfaces dry, clean and free from oil and grease.
Slippery handles and grasping surfaces do not allow for safe handling and control of the
tool in unexpected situations.
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 Safety Rules for Flip-over Saws
• Do not allow untrained people to operate this machine.
• Do not use the saw to cut materials other than wood or similar materials.
• Select the correct saw blade for the material to be cut.
• Do not use cracked or damaged saw blades.
• Do not use HIGH SPEED STEEL blades.
• Use correctly sharpened blades. Observe the maximum speed marked on the saw blade. The
marked speed must always be equal to or greater than the no-load speed of the machine
specified under technical data.
• Do not use any spacers and spindle rings to make a blade fit onto the spindle.
• Ensure that the saw blade is mounted correctly before use.
• Make sure that the blade rotates in the correct direction. Keep the blade sharp.
• Do not use blades of larger or smaller diameter than recommended. For the proper blade
rating refer to the technical data. Use only the blades specified in this manual, complying
with EN847-1.
• Consider applying specially designed noise-reduction blades.
• Disconnect the machine from the mains supply before leaving the working place.
• Do not use the saw without the guards and riving knife in position and properly maintained,
especially when changing from mitre saw mode to bench saw mode, or vice versa.
• Make sure the floor area around the machine is level, well maintained and free of loose
materials, e.g. chips and cut-offs.
• Make sure adequate general or localized lighting is provided.
• Wear suitable personal protective equipment when necessary, including:
- hearing protection to reduce the risk of induced hearing loss;
- respiratory protection to reduce the risk of inhalation of harmful dust;
10
- gloves for handling saw blades and rough material. Saw blades should be carried in a
holder wherever practicable.
• Before making any operation ensure the machine is located on an even and stable surface.
• Refrain from removing any cut-offs or other parts of the work piece from the cutting area
while the saw is running and the saw head is not in the rest position.
• Replace the table insert when worn.
• Replace the table when the slot in the table is too wide.
• Report faults in the machine, including guards or saw blades, to your dealer as soon as they
are discovered.
• Ensure that the upper portion of the saw blade is completely enclosed in the mitre
sawing mode.
• Ensure that the arm is securely fixed in the working position in the bench sawing mode.
• Ensure that the arm is securely fixed when bevelling in the bench saw mode.
• Take care when grooving during the bench saw operation by using appropriate guarding
system. Slotting is not allowed.
• Connect the saw to a dust collection device when sawing wood. Always consider factors
which influence exposure of dust such as:
- Type of material to be machined (chip board produces more dust than wood);
- Correct adjustment of the saw blade;
- Ensure that the local extraction as well as hoods, baffles and chutes are properly adjusted.
- Dust extractor with air velocity not less than 20 m/s
• Do not use any abrasive discs or diamond cutting wheels..
• In case of an accident or machine failure, immediately turn the machine off and disconnect
machine from the power source.
• Report the failure and mark the machine in suitable form to prevent other people from using
the defective machine.
• When the saw blade is blocked due to abnormal feed force during cutting, turn the machine
off and disconnect it from power supply. Remove the workpiece and ensure that the saw blade
runs free. Turn the machine on and start new cutting operation with reduced feed force.
• Never cut light alloy, especially magnesium.
• Whenever the situation allows, mount the machine to a bench using bolts with a diameter of
8 mm and 80 mm in length (Fig. G2).

Additional Safety Rules for Mitre Saws

• Make sure all locking knobs and clamp handles are tight before starting any operation.
• Do not operate the machine without the guard in position, or if the guard does not function or
is not maintained properly.
• Never use your saw without the kerf plate.
• Never place either hand in the blade area when the saw is connected to the electrical
power source.
• Never attempt to stop a machine in motion rapidly by jamming a tool or other means against
the blade; serious accidents can be caused unintentionally in this way.
• Before using any accessory consult the instruction manual. The improper use of an accessory
can cause damage.
• Select the correct blade for the material to be cut.
• Use a holder or wear gloves when handling a saw blade or rough material.
• Raise the blade from the kerf in the workpiece prior to releasing the switch.
• Ensure that the arm is securely fixed when performing bevel cuts.
• Do not wedge anything against the fan to hold the motor shaft.
• The blade guard on your saw will automatically raise when the arm is brought down; it will
lower over the blade when the arm is raised. The guard can be raised by hand when installing
or removing saw blades or for inspection of the saw. Never raise the blade guard manually
unless the saw is switched off.
• Keep the surrounding area of the machine well maintained and free of loose materials, e.g.
chips and cut-offs.
• Check periodically that the motor air slots are clean and free of chips.
• Replace the kerf plate when worn.
• Disconnect the machine from the mains before carrying out any maintenance work or when
changing the blade.
• Never perform any cleaning or maintenance work when the machine is still running and the
head is not in the rest position.
• When possible, always mount the machine to a bench.
• If you use a laser to indicate the cutting line, make sure that the laser is of class 2 according to
EN60825-1:2007. Do not replace a laser diode with a different type. If damaged, have the laser
repaired by an authorised repair agent.
• Never use the machine in mitre saw mode as long as the guard is not fitted (
• Never cut workpiece shorter than 150 mm.
• Without additional support the machine is designed to accept the maximum workpiece
size of:
- Height 68 mm by width 140 mm by length 600 mm
- Longer workpieces need to be supported by suitable additional table. Always clamp the
workpiece safely.
• Always clamp the workpiece safely.
41 Fig. H).