Kickback Causes And Related Warnings; Saw Blades - DeWalt DWE7491 Manual De Instrucciones

k ) Do not remove pieces of cut-off material while the saw is running. The material
may become trapped between the fence or inside the saw blade guard and the saw
blade pulling your fingers into the saw blade. Turn the saw off and wait until the saw
blade stops before removing material.
l ) Use an auxiliary fence in contact with the table top when ripping workpieces less
than (2 mm) thick. A thin workpiece may wedge under the rip fence and create a kickback.

3) Kickback Causes and Related Warnings

Kickback is a sudden reaction of the workpiece due to a pinched, jammed saw blade or misaligned
line of cut in the workpiece with respect to the saw blade or when a part of the workpiece binds
between the saw blade and the rip fence or other fixed object.
Most frequently during kickback, the workpiece is lifted from the table by the rear portion of the saw
blade and is propelled towards the operator.
Kickback is the result of saw misuse and/or incorrect operating procedures or conditions and can be
avoided by taking proper precautions as given below.
a ) Never stand directly in line with the saw blade. Always position your body on the
same side of the saw blade as the fence. Kickback may propel the workpiece at high
velocity towards anyone standing in front and in line with the saw blade.
b ) Never reach over or in back of the saw blade to pull or to support the workpiece.
Accidental contact with the saw blade may occur or kickback may drag your fingers into the
saw blade.
c ) Never hold and press the workpiece that is being cut off against the rotating saw
blade. Pressing the workpiece being cut off against the saw blade will create a binding
condition and kickback.
d ) Align the fence to be parallel with the saw blade. A misaligned fence will pinch the
workpiece against the saw blade and create kickback.
e ) Use a featherboard to guide the workpiece against the table and fence when
making non-through cuts such as rabbeting cuts. A featherboard helps to control the
workpiece in the event of a kickback.
f ) Support large panels to minimize the risk of saw blade pinching and kickback.
Large panels tend to sag under their own weight. Support(s) must be placed under all
portions of the panel overhanging the table top.
g ) Use extra caution when cutting a workpiece that is twisted, knotted, warped or
does not have a straight edge to guide it with a miter gauge or along the fence. A
warped, knotted, or twisted workpiece is unstable and causes misalignment of the kerf with
the saw blade, binding and kickback.
h ) Never cut more than one workpiece, stacked vertically or horizontally. The saw blade
could pick up one or more pieces and cause kickback.
i ) When restarting the saw with the saw blade in the workpiece, center the saw blade
in the kerf so that the saw teeth are not engaged in the material. If the saw blade
binds, it may lift up the workpiece and cause kickback when the saw is restarted.
j ) Keep saw blades clean, sharp, and with sufficient set. Never use warped saw blades
or saw blades with cracked or broken teeth. Sharp and properly set saw blades minimize
binding, stalling and kickback.
4) Table Saw Operating Procedure Warnings
a ) Turn off the table saw and disconnect from the power source when removing the
table insert, changing the saw blade or making adjustments to the riving knife,
anti-kickback pawls or saw blade guard, and when the machine is left unattended.
Precautionary measures will avoid accidents.
b ) Never leave the table saw running unattended. Turn it off and don't leave the tool
until it comes to a complete stop. An unattended running saw is an uncontrolled hazard.
c ) Locate the table saw in a well-lit and level area where you can maintain good
footing and balance. It should be installed in an area that provides enough room
to easily handle the size of your workpiece. Cramped, dark areas, and uneven slippery
floors invite accidents.
d ) Frequently clean and remove sawdust from under the saw table and/or the dust
collection device. Accumulated sawdust is combustible and may self-ignite.
e ) The table saw must be secured. A table saw that is not properly secured may move or
tip over.
f ) Remove tools, wood scraps, etc. from the table before the table saw is turned on.
Distraction or a potential jam can be dangerous.
g ) Always use saw blades with correct size and shape (diamond versus round) of
arbour holes. Saw blades that do not match the mounting hardware of the saw will run
off-center, causing loss of control.
h ) Never use damaged or incorrect saw blade mounting means such as flanges, saw
blade washers, bolts or nuts. These mounting means were specially designed for your
saw, for safe operation and optimum performance.
i ) Never stand on the table saw, do not use it as a stepping stool. Serious injury could
occur if the tool is tipped or if the cutting tool is accidentally contacted.
j ) Make sure that the saw blade is installed to rotate in the proper direction. Do not
use grinding wheels, wire brushes, or abrasive wheels on a table saw. Improper saw
blade installation or use of accessories not recommended may cause serious injury.
Additional Safety Rules for Table Saws

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.
• Avoid awkward positions, where a sudden slip could cause a hand to move into a saw blade.
• Do not attempt to retrieve materials near the blade on the saw table while the blade is spinning.
• Never reach in back of, or around, the cutting tool with either hand to hold down
the workpiece.
• Keep Arms, Hands and fingers away from the blade to prevent serious injury.
• Use a push stick that is appropriate to the application to push workpieces through the
saw. A push stick is a wooden or plastic stick, often homemade, that should be used whenever
the size or shape of the workpiece would cause you to place your hands within 6" (152 mm) of
the blade.
• Use hold-downs, jigs, fixtures or feather boards to help guide and control the
workpiece. Accessories for use with your tool are available at extra cost from your local dealer
or authorized service center. Instructions for making a push stick, a narrow rip auxiliary fence, a
push block and feather boards are included in this manual.
Do not perform ripping, crosscutting or any other operation freehand.
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NEVER reach around or over saw blade while the blade is spinning.
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Stability. Make sure the table saw is firmly mounted to a secure surface before use and does
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not move.
The table saw should only be set up on a level and stable surface. The work area should be
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free from obstructions and trip hazards. No materials or tools should be leaned against the saw.
Never cut metals, cement board or masonry. Certain man-made materials have special
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instructions for cutting on table saws. Follow the manufacturer's recommendations at all times.
Damage to the saw and personal injury may result.
• Do not install a diamond masonry blade and attempt to use the table saw as a wet saw.
• The proper throat plate must be locked in place at all times to reduce the risk of a thrown
workpiece and possible injury.
• Wear gloves when handling saw blades.
• Use the correct saw blade for the intended operation. The blade must rotate toward the
front of the saw. Always tighten the blade arbor nut securely. Before use, inspect the blade for
cracks or missing teeth. Do not use a damaged or dull blade.
• Never attempt to free a stalled saw blade without first turning the machine off and
disconnect the plug from the power source. If a workpiece or cut-off piece becomes trapped
inside the blade guard assembly, turn saw off and wait for blade to stop before lifting the blade
guard assembly and removing the piece.
• Never Start The Machine with the workpiece against the blade to reduce the risk of a thrown
workpiece and personal injury.
• Do Not Have Any Part Of Your Body In Line With The Blade. Personal injury may occur.
Stand to either side of the blade.
• Never Perform Layout, Assembly Or Set-Up Work on the table/work area when the machine
is running. A sudden slip could cause a hand to move into the blade. Severe injury can result.
• Never perform any adjustments while the saw is running such as fence repositioning or
removal, bevel lock adjustment, or blade height adjustment.
• Clean the table/work area before leaving the machine. Lock the switch in the "OFF"
position and disconnect the plug from the power source to prevent unauthorized use.
• ALWAYS lock the fence and bevel adjustment before cutting.
• Avoid overheating the saw blade tips. Keep material moving and parallel with the fence. Do
not force work into the blade.
• If cutting plastic materials, avoid melting the plastic.
• DO NOT leave a long board (or other workpiece) unsupported so the spring of the board
causes it to shift on the table resulting in loss of control and possible injury. Provide
proper support for the workpiece, based on its size and the type of operation to be performed.
Hold the work firmly against the fence and down against the table surface.
If this saw makes an unfamiliar noise or if it vibrates excessively, cease operating immediately,
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turn unit off and disconnect from the plug from the power source until the problem has been
located and corrected. Contact a D WALT factory service center, a D
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center or other qualified service personnel if the problem can not be found.
Do not operate this machine until it is completely assembled and installed according to the
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instructions. A machine incorrectly assembled can cause serious injury.
• NEVER attempt to cut a stack of loose pieces of material which could cause loss of control or
kickback. Support all materials securely.

Saw Blades

• Do not use saw blades that do not conform to the dimensions stated in the Specifications. Do
not use any spacers to make a blade fit onto the spindle. Use only the blades specified in this
manual, complying with EN847-1, if intended for wood and similar materials.
• Consider applying specially designed noise-reduction blades.
• Do not use high steel (HS) saw blades.
• Do not use cracked or damaged saw blades.
• Ensure that the chosen saw blade is suitable for the material to be cut.
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