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If the weight of the tree trunk is resting on both ends as shown in Fig. 21, first cut through 1/3
of the trunk diameter from the top (A) in order to prevent it from splintering. Make the second
cut from underneath (2/3 of the diameter) to the height of the first cut (B) (this prevents the
chainsaw from being trapped).
When working with the saw on a slope, always position yourself at a higher point on the slope
above the tree as shown in Fig. 14. In order to retain full control at the moment when the cut
goes through, reduce pressure towards the end of the cut without releasing your firm grip on
the handles of the chainsaw. Take care to ensure that the chainsaw does not touch the
ground. After completing the cut, wait for the chain saw to come to a standstill before
removing the chainsaw. Always switch off the motor of the chainsaw before moving from tree
to tree.
Fig19
Fig.20
Fig.21
9.3 Kickback
The term "kickback" describes what happens when the running chainsaw suddenly kicks
upward and backward. Usually, this is caused by contact between the tip of the cutter rail and
the workpiece or the saw chain becoming trapped. In the event of kickback, large forces
occur suddenly and violently. As a result, the chainsaw usually reacts uncontrollably. This can
often result in very serious injuries to the worker or persons in the vicinity. The risk of
kickback is particularly great when performing cross cuts, angled cuts and longitudinal cuts,
as it is not possible to use the claw stop on these cuts. You should therefore avoid these cuts
as far as possible and take particular care when they are unavoidable.
The risk of kickback is at its greatest when the saw is positioned for a cut in the region of the
tip of the cutter rail, as the leverage effect is greatest there (Fig. 22). It is therefore safest to
position the saw flat and as close as possible to the claw stop before making the cut (Fig. 23).
Fig.22
Fig.23
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