6
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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 firm 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, center the saw blade in the kerf and check that 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. Supports must be placed under the panel on both sides, near the line of
cut and near the edge of the panel.
Do not use dull or damaged blade.
Dull blades produce a 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 sawing into existing walls or other blind areas.
The protruding blade may
cut objects that can cause kickback
11. Use only recommended
blades, rated at the machine’s maximum rated RPM or higher with correct arbor
hole.
Lower guard function
a) Check lower guard for proper closing before each use. Do not operate the saw if lower guard
does not move freely and close instantly. Never clamp or tie the lower guard into the open
position.
If saw is accidentally dropped, lower guard may be bent. Raise the lower guard with the
retracting handle and make sure it moves freely and does not touch the blade or any other part, in
all angles and depths of cut.
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