DeWalt DHS790 Manual page 5

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s ) 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.
t ) 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.
u ) 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.
v ) Maintain power tools and accesories. 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.
w ) Keep cutting tools sharp and clean. Properly maintained cutting tools with sharp cutting
edges are less likely to bind and are easier to control.
x ) 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.
y ) 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.
Battery Tool Use and Care
z ) Recharge only with the charger specified by the manufacturer. A charger that is
suitable for one type of battery pack may create a risk of fire when used with another
battery pack.
aa ) Use power tools only with specifically designated battery packs. Use of any other
battery packs may create a risk of injury and fire.
ab ) When battery pack is not in use, keep it away from other metal objects, like paper
clips, coins, keys, nails, screws or other small metal objects, that can make a
connection from one terminal to another. Shorting the battery terminals together may
cause burns or a fire.
ac ) Under abusive conditions, liquid may be ejected from the battery; avoid contact. If
contact accidentally occurs, flush with water. If liquid contacts eyes, additionally
seek medical help. Liquid ejected from the battery may cause irritation or burns.
ad ) Do not use a battery pack or tool that is damaged or modified. Damaged or modified
batteries may exhibit unpredictable behavior resulting in fire, explosion or risk of injury.
ae ) Do not expose a battery pack or tool to fire or excessive temperature. Exposure to fire
or temperature above 265 °F (130 °C) may cause explosion.
af ) Follow all charging instructions and do not charge the battery pack or tool outside
the temperature range specified in the instructions. Charging improperly or at
temperatures outside the specified range may damage the battery and increase the risk of
fire.
Service
ag ) 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.
ah ) Never service damaged battery packs. Service of battery packs should only be performed
by the manufacturer or authorized service providers.
Safety Instructions for Miter Saws
a ) Miter saws are intended to cut wood or wood-like products, they cannot be used
with abrasive cut-off wheels for cutting ferrous material such as bars, rods, studs,
etc. Abrasive dust causes moving parts such as the lower guard to jam. Sparks from abrasive
cutting will burn the lower guard, the kerf insert and other plastic parts.
b ) Use clamps to support the workpiece whenever possible. If supporting the
workpiece by hand, you must always keep your hand at least 4" (100 mm) from
either side of the saw blade. Do not use this saw to cut pieces that are too small to
be securely clamped or held by hand. If your hand is placed too close to the saw blade,
there is an increased risk of injury from blade contact.
c ) The workpiece must be stationary and clamped or held against both the fence and
the table. Do not feed the workpiece into the blade or cut "freehand" in any way.
Unrestrained or moving workpieces could be thrown at high speeds, causing injury.
d ) Push the saw through the workpiece. Do not pull the saw through the workpiece. To
make a cut, raise the saw head and pull it out over the workpiece without cutting,
start the motor, press the saw head down and push the saw through the workpiece.
Cutting on the pull stroke is likely to cause the saw blade to climb on top of the workpiece
and violently throw the blade assembly towards the operator.
e ) Never cross your hand over the intended line of cutting either in front or behind the
saw blade. Supporting the workpiece "cross handed" i.e. holding the workpiece to the right
of the saw blade with your left hand or vice versa is very dangerous.
f ) Do not reach behind the fence with either hand closer than 100 mm from either side
of the saw blade, to remove wood scraps, or for any other reason while the blade
is spinning. The proximity of the spinning saw blade to your hand may not be obvious and
you may be seriously injured.
g ) Inspect your workpiece before cutting. If the workpiece is bowed or warped, clamp
it with the outside bowed face toward the fence. Always make certain that there
is no gap between the workpiece, fence and table along the line of the cut. 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 miter saw is mounted or placed on a level, firm work surface before use.
A level and firm work surface reduces the risk of the miter saw becoming unstable.
k ) Plan your work. Every time you change the bevel or miter 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 miter
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 miter 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 miter 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 Miter 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.
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.
FOLLOW ALL WIRING CODES and recommended electrical connections to prevent shock
or electrocution. Protect electric supply line with at least a 15 ampere time-delay fuse or a
circuit breaker.
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 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 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 PLACE HANDS CLOSER THAN 4" (100 mm) FROM THE BLADE.
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.
English
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