Causes And Operator Prevention Of Kickback - DeWalt DW368 Manual De Instrucciones

• NEVER hold piece being cut in your hands or across your leg. It
is important to support the work properly to minimize body exposure,
blade binding, or loss of control.
• Hold tool by insulated gripping surfaces when performing an
operation where the cutting tool may contact hidden wiring or
its own cord. Contact with a "live" wire will also make exposed metal
parts of the tool "live" and shock the operator.
• When ripping, always use a rip fence or straight edge guide.
This improves the accuracy of cut and reduces the chance for blade
binding.
• Always use blades with correct size and shape (diamond vs.
round) arbor holes. Blades that do not match the mounting hardware
of the saw will run eccentrically, causing loss of control.
• Never use damaged or incorrect blade washers or bolts. The
blade washers and bolt were specially designed for your saw, for
optimum performance and safety of operation.

CAUSES AND OPERATOR PREVENTION OF KICKBACK

• Kickback is a sudden reaction to a pinched, bound or misaligned saw
blade, causing an uncontrolled saw to lift up and out of the workpiece
toward the operator.
• When the blade is pinched or bound tightly by the kerf closing down,
the blade stalls and the motor reaction drives the unit rapidly back
toward the operator.
• If the blade becomes twisted or misaligned in the cut, the teeth at the
back edge of the blade can dig into the top surface of the wood causing
the blade to climb out of the kerf and jump back toward operator.
• Kickback is the result of tool misuse and/or incorrect operating
procedures or conditions and can be avoided by taking proper
precautions as given below.
a. Maintain a firm grip with both hands on the saw and position
your body and arm to allow you to resist KICKBACK forces.
Kickback forces can be controlled by the operator, if proper
precautions are taken.
b. When blade is binding, or when interrupting a cut for any
reason, release the trigger and hold the saw motionless in the
material into the blade comes to a complete stop. Never attempt
to remove the saw from the work or pull the saw backward while
the blade is in motion or KICKBACK may occur. Investigate and
take corrective actions to eliminate the cause of blade binding.
c. When restarting a saw in the workpiece, center the saw blade in
the kerf and check that the saw teeth are not engaged into the
material. If saw blade is binding, it may walk up or KICKBACK from
the workpiece as the saw is restarted.
d. Support large panels to minimize the risk of blade pinching
and KICKBACK. Large panels tend to sag under their own weight.
Support must be placed under the panel on both sides, near the line
of cut and near the edge of the panel.
e. Do not use dull or damaged blade. Unsharpened or improperly
set blades produce narrow kerf causing excessive friction, blade
binding, and KICKBACK.
f. Blade depth and bevel adjusting locking levers must be tight
and secure before making cut. If blade adjustment shifts while
cutting, it may cause binding and KICKBACK.
g. Use extra caution when making a "Pocket Cut" into existing
walls or other blind areas. The protruding blade may cut objects
that can cause KICKBACK.
Additional Specific Instructions
CAUTION: When cutting into walls, floors or wherever live electrical
wires may be encountered, DO NOT TOUCH ANY METAL PARTS OF
THE TOOL! Hold the tool only by insulated grasping surfaces to prevent
electric shock if you cut into a live wire.
• KEEP BLADES CLEAN AND SHARP. Sharp blades minimize stalling
and kickback.
DANGER: KEEP HANDS AWAY FROM CUTTING AREA. Keep
hands away from blades. Do not reach underneath work while blade is
rotating. Do not attempt to remove cut material when blade is moving.
CAUTION: Blades coast after turn off.
• SUPPORT LARGE PANELS. Large panels must be supported
as shown in Figure 10 to minimize the risk of blade pinching and
kickback. When cutting operation requires the resting of the saw on
the work piece, the saw shall be rested on the larger portion and the
smaller piece cut off.
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