Stihl MSA 220 C Notice D'emploi page 69

11 Operating the Saw
E Felling cut
The tree is felled with the felling cut. The felling cut is
1/10 of the trunk diameter (at least 3 cm) above the
bottom of the felling notch.
F Stabilizing strap
The stabilizing strap supports the tree and helps prevent
it from falling prematurely. The width of the stabilizing
strap is 1/10 to 1/5 of the trunk diameter.
G Holding strap
The holding strap supports the tree and helps prevent it
from falling prematurely. The width of the holding strap is
1/10 to 1/5 of the trunk diameter.
11.4.4 Cutting the felling notch
The felling notch determines the direction in which the tree
falls. Country-specific standards for making the felling notch
must be observed.
► Position the saw so that the felling notch is an right angles
to the direction of fall and the saw is close to the ground.
► Make the horizontal cut.
► Make the angle cut at 45° to the horizontal cut.
0458-795-9621-A
► If the wood is sound and long-fibered: Observe the
following points when making sapwood cuts:
– The cuts must be the same at both sides.
– The cuts must be at the same height as the bottom of
the felling notch.
– The width of the cuts is 1/10 of the trunk diameter.
The trunk does not splinter when the tree falls.
11.4.5 Plunge cutting
Plunge cutting is a technique required for felling.
90°
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► Begin cut with the lower portion of the guide bar nose –
with chain running at full speed.
► Cut until depth of kerf is twice the width of the guide bar.
► Swing the saw into plunge-cutting position.
► Perform the plunge cut.
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