Causes And Operator Prevention Of Kickback - DeWalt DC300 Mode D'emploi

d Never hold piece being cut in your hands
or across your leg. Secure the workpiece
to a stable platform.
It is important to support the work properly
to minimize body exposure, blade binding, or
loss of control.
e Hold power 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 power tool "live"
and shock the operator.
f When ripping always use a rip fence or
straight edge guide.
This improves the accuracy of cut and
reduces the chance of blade binding.
g Always use blades with correct size and
shape (diamond versus round) of arbour
holes. Blades that do not match the
mounting hardware of the saw will run
eccentrically, causing loss of control.
h Never use damaged or incorrect blade
washers or bolt.
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 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 Maintain a fi rm grip with both hands on
the saw and position your arms to resist
kickback forces. Position your body to
either side of the blade, but not in line with
the blade.
Kickback could cause the saw to jump
backwards, but 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 until
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,
centre the saw blade in the kerf and check
that 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 minimise the risk of
blade pinching and kickback.
Large panels tend to sag under their own
weight. Supports 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 blades.
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 "plunge
cut" into existing walls or other blind areas.
The protruding blade may cut objects that can
cause kickback.
E N G L I S H
35