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4 Working Techniques
Determine direction of fall with gunning sight on
cover and fan housing
Your chainsaw has a gunning sight on the cover
and fan housing. Use this gunning sight.
Making the felling notch
When making a felling notch, align the chainsaw
so that the notch lies at a right angle to the direc‐
tion of fall.
During the procedure, various sequences are
permitted for making a felling notch with a bottom
(horizontal) cut and top (angled) cut – comply
with national legislation regarding felling techni‐
que.
► Make a bottom (horizontal) cut
► Make the top (angled) cut approx. 45°‑ 60° to
the bottom cut
Checking the direction of fall
► Insert the chainsaw with guide bar in the bot‐
tom of the felling notch. The gunning sight
must point in the planned direction of fall – if
necessary, correct direction of fall by re-cutting
the felling notch.
0458-562-8721-B
4.4
Sapwood cuts
Sapwood cuts in long-fibered softwood help pre‐
vent sapwood splintering when the tree falls.
Make cuts at both sides of the trunk at same
height as bottom of felling notch to a depth of
about 1/10 of trunk diameter. On large diameter
trees, cut to no more than width of guide bar.
Do not make sapwood cuts if wood is diseased.
4.5
Basic information on felling cut
Basic dimensions
C
The felling notch (C) determines the direction of
fall.
The hinge (D) functions like a real hinge to guide
the tree to the ground.
– Width of hinge: approx. 1/10 of the trunk diam‐
eter
– Never saw through the hinge while felling –
otherwise the tree will fall in a direction other
than the one planned – risk of accident!
– With rotten trunks, leave a wider hinge
The tree is felled with the felling cut (E).
– Cut horizontally
– 1/10 (at least 3 cm) of tree diameter higher
than bottom of felling notch (C).
The holding strap (F) or stabilizing strap (G) sup‐
ports the tree and helps prevent it from falling
prematurely.
– Width of strip: approx. 1/10 to 1/5 of the trunk
diameter
– Do not cut into the strip during the felling cut
English
C
E
1/10
G
Ø
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