DeWalt DHS780 - Additional Mitre Saw Safety Rules; General Precautions and Blade Safety; Blade and Guard Maintenance

10
ENGLISH
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 connect the power supply into the 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
in the direction of rotation as marked on thesaw.
• TIGHTEN ALL CLAMP HANDLES, knobs and levers prior to operation. Loose clamps can
cause parts or the workpiece to be thrown at highspeeds.
• BE SURE all blade and blade clamps are clean, recessed sides of blade clamps are against
blade and arbour 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
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 has been turned off and the battery
packs have been removed. Contact 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 EN847-1).
• 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. Observe the maximum speed marked on
the sawblade.
• 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.
• THE 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 the rating plate
of thetool.
• 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
guard. The polycarbonate material used in the guard is subject to attack by certainchemicals.
• KEEP GUARD IN PLACE and in workingorder.
• 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.
• MAKE SURE to use the correct saw blade for the material to becut.
• 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
is unintentionallycontacted.

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 wear proper personal hearing protection. 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.

WARNING: ALWAYS use safety glasses. Everyday eyeglasses are NOT safety glasses. Also
use face or dust mask if cutting operation isdusty.

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.

WARNING: Some dust created by power sanding, sawing, grinding, drilling, and other
construction activities contains chemicals known 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.
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.
• Risk of injury when changing the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 increase the risk of breathing problems:
• No dust extractor connected when sawingwood.
• Insufficient dust extraction caused by uncleaned exhaustfilters.
SAVE THESE INSTRUCTIONS
Chargers
DeWALT
chargers require no adjustment and are designed to be as easy as possible tooperate.
Electrical Safety
This machine has been designed to different voltages—battery supply 2x 54V and AC supply
115V or 230V. Always check that the battery pack voltage corresponds to the voltage on
the rating plate. Also make sure that the voltage of your corded power supply and charger
corresponds to that of yourmains.
Your
DeWALT
tool, charger and corded power supply are double insulated in
accordance with EN62841 and EN60335; therefore no earth wire isrequired.
If the supply cord is damaged, it must be replaced only by
DeWALT
or an authorised
serviceorganisation.

WARNING: We recommend the use of a residual current device with a residual current
rating of 30mA orless.

WARNING: 115 V units have to be operated via a fail-safe isolating transformer with an
earth screen between the primary and secondarywinding.
Mains Plug Replacement
(U.K. & Ireland Only)
If a new mains plug needs to be fitted:
• Safely dispose of the oldplug.
• Connect the brown lead to the live terminal in theplug.
• Connect the blue lead to the neutralterminal.

WARNING: No connection is to be made to the earthterminal.
Follow the fitting instructions supplied with good quality plugs. Recommended fuse for the
charger: 3A. Recommended fuse for the corded power supply:13A.
Using an Extension Cable for Your Charger or Corded PowerSupply
An extension cord should not be used unless absolutely necessary. Use an approved extension
cable suitable for the power input of your charger or corded power supply (see Technical
Data). The minimum conductor size is 1.5mm
2
; the maximum length is30m.
When using a cable reel, always unwind the cablecompletely.