Reactive Forces - Stihl MSA 120 C Manual De Instrucciones

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4.8

Reactive Forces

4.8.1 Kickback
Kickback can be caused for the following reasons:
– The rotating saw chain in the upper quadrant of the bar
nose makes contact with a hard object and is suddenly
braked.
– The rotating saw chain is pinched at the bar nose.
The chain brake cannot prevent kickback.
WARNING
￭
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￭ If kickback occurs, the saw can be thrown up in the
direction of the operator. The operator can lose control of
the saw and be seriously or fatally injured.
► Hold the saw firmly with both hands.
► Always keep your body out of the plane of the cutting
attachment.
► Operate the saw as described in this instruction manual.
► Do not cut with the upper quadrant of the bar nose.
► Always cut with a properly sharpened and tensioned
saw chain.
► Use a reduced kickback saw chain.
► Use a guide bar with a narrow radius nose.
► Always cut with the chain running at full speed.
4.8.2 Pull-in
The saw is pulled away from the operator when the bottom
of the bar is used for cutting.
WARNING
￭ If the rotating chain makes contact with a hard object and
is suddenly pinched, the saw is abruptly jerked away from
the operator. The operator can lose control of the saw and
be seriously or fatally injured.
► Hold the saw firmly with both hands.
► Operate the saw as described in this instruction manual.
► Keep the guide bar straight in the cut.
4 Safety Precautions
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