Husqvarna K 770 Operator's Manual page 17

If the blade is pinched or stalled, the reactive force will
be strong and you might not be able to control the power
cutter.
Never move the product when the cutting equipment is
rotating. Gyroscopic forces can obstruct the intended
movement
Kickback zone
Never use the kickback zone of the blade for cutting. If
the blade is pinched or stalled in the kickback zone, the
reactive force will push the power cutter up and back
towards the user in a rotating motion causing serious or
even fatal injury.
Rotational kickback
A rotational kickback occurs when the cutting blade
does not move freely in the kickback zone.
1447 - 001 - 16.04.2020
Climbing kickback
If the kickback zone is used for cutting, the reactive
force drives the blade to climb up in the cut. Do not use
the kickback zone. Use the lower quadrant of the blade
to avoid climbing kickback.
Pinching kickback
Pinching is when the cut closes and pinches the blade. If
the blade is pinched or stalled the reactive force will be
strong and you might not be able to control the power
cutter.
If the blade is pinched or stalled in the kickback zone,
the reactive force will push the power cutter up and back
towards the user in a rotating motion causing serious or
even fatal injury. Be alert for potential movement of the
work piece. If the work piece is not properly supported
and shifts as you cut, it might pinch the blade and cause
a kick back.
To cut in pipes
WARNING: If the blade is pinched in the
kickback zone it will cause a severe
kickback.
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