Additional Safety Rules For Mitre Saws; Residual Risks - DeWalt DCS778 Manual

18 . Check for damaged parts.
Before use, carefully check the machine to determine that it will operate
properly and perform its intended function. Check for alignment of moving
parts, binding of moving parts, breakage of parts, mounting and any
other conditions that may affect its operation. A guard or other part that
is damaged should be properly repaired or replaced by an authorized
service centre unless otherwise indicated in this instruction manual. Have
defective switches replaced by an authorized service centre.
Do not use the tool if the switch does not turn it on and off.
Never attempt any repairs yourself.

WARNING! The use of any accessory or attachment or performance
of any operation with this tool other than those recommended in this
instruction manual may present a risk of personal injury.
19 . Have your tool repaired by a qualified person.
This electric tool complies relevant safety rules. Repairs should only be
carried out by qualified persons using original spare parts; otherwise this
may result in considerable danger to the user.

Additional Safety Rules for Mitre Saws

• Do not use the saw to cut other materials than those recommended by
the manufacturer.
• Do not operate the machine without guards in position, or if guards do not
function or are not maintained properly.
• Ensure that the arm is securely fixed when performing bevel cuts.
• Keep the floor area around the machine level, well-maintained and free of
loose materials, e.g., chips and cut-offs.
• Select the correct blade for the material to be cut.
• Use correctly sharpened saw blades. Observe the maximum speed mark on
the saw blade.
• Make sure all locking knobs and clamp handles are tight before starting
any operation.
• 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 occur.
• Before using any accessory consult the instruction manual. The improper
use of an accessory can cause damage.
• Use a holder or wear gloves when handling a saw blade or rough material.
• Ensure that the saw blade is mounted correctly before use.
• Make sure that the blade rotates in the correct direction.
• 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.
• Do not use HIGH SPEED STEEL blades.
• Do not use cracked or damaged saw blades.
• Do not use any abrasive or diamond discs.
• Use only saw blades where the marked speed is at least equal to the speed
marked on the saw.
• Never use your saw without the kerf plate.
• Raise the blade from the kerf in the workpiece prior to releasing the switch.
• Before each cut ensure that the machine is stable.
• Do not wedge anything against the fan to hold the motor shaft.
• The blade guard on your saw will open when the guard release lever
is pushed.
• Never raise the blade guard manually unless the saw is switched off. The
guard can be raised by hand when installing or removing saw blades or
for inspection of the saw.
• Check periodically that the motor air slots are clean and free of chips.
• Replace the kerf plate when worn.
• Remove the battery from the machine 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 fitted with LED, no exchange with different type of LED
permitted. Repairs shall only be carried out by the manufacturer or an
authorized agent.
• Connect the saw to a dust collection device when sawing wood. Always
consider factors which influence exposure of dust such as:
ʵ type of material to be machined (chip board produces more dust than
wood);
ʵ sharpness of the saw blade;
ʵ correct adjustment of the saw blade,
ʵ dust extractor with air velocity not less than 20 m/s.
Ensure that the local extraction as well as hoods, baffles and chutes are
properly adjusted.
• Please be aware of the following factors influencing exposure
to noise:
ʵ use saw blades designed to reduce the emitted noise;
ʵ use only well sharpened saw blades;
• Machine maintenance shall be conducted periodically;
• Provide adequate general or localized lighting;
• Ensure the operator is adequately trained in the use, adjustment and
operation of the machine;
• Ensure that any spacers and spindle rings are suitable for the purpose as
stated in this manual.
• Refrain from removing any cut-offs or other parts of the workpiece from
the cutting area while the machine is running and the saw head is not in
the rest position
• Never cut workpieces shorter than 150 mm.
• Without additional support the machine is designed to accept the
maximum workpiece size of:
ʵ Height 60 mm by width 216 mm by length 500 mm
ʵ Longer workpieces need to be supported by suitable additional table,
e.g. DE7023. Always clamp the workpiece safely.
• 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.

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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• Risk of injury when changing the unprotected saw blade.
• Risk of squeezing fingers when opening the guards.
• Health hazards caused by breathing dust developed when sawing wood,
especially oak, beech and MDF.
The following factors increases the risk of breathing problems:
• No dust extractor connected when sawing wood
• Insufficient dust extraction caused by uncleaned exhaust filters
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