Safety: Operation Precautions
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Avoid Chain Shot
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Saw chain Break without Saw chain shot Guard
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Saw chain Break with Saw chain shot Guard
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Saw chain shot Hazard Zone
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Safety Sign
Chain shot is the high velocity separation and ejection
of a piece or pieces from the end of a broken saw chain
during mechanized timber harvesting.
CAUTION: Saw chain shot exposes machine
operators and bystanders to death or
serious injury
Chain shot typically occurs near the saw drive sprocket
of the cutting system; it can also come from the saw bar
tip. Chain shot pieces typically travel within 15 degrees
on either side of the saw bar plane.
A chain shot consists of two breaks in a saw chain. First,
the saw chain loop breaks and forms two ends. One end
moves past the saw chain drive sprocket or saw bar tip and
is rapidly accelerated due to motion of the saw chain end.
The whip action causes a second break in the saw chain,
ejecting pieces of the cutting saw chain at high speed.
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