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Kettensaege_Elektro_302128.book Seite 55 Donnerstag, 5. Januar 2017 4:59 16
With this technique, sawing occurs with the
underside of the saw rail from above down-
wards. The saw chain thus pushes the device
forwards away from the user. This way, the
front edge of the device forms a support,
which catches the forces which arise on the
tree trunk when sawing.
With pulling sawing, the user has much more
control over the device and can avoid
rebounds better. Therefore, this is the pre-
ferred sawing technique.
Pushing sawing
With this technique, sawing occurs with the
upper edge of the saw rail from below
upwards. The saw chain thus pushes the
device backwards towards the user. If the
saw rail twists, the device can fly towards the
user with great force.
If the user does not balance out the force of
the saw chain pushing backwards with his or
her bodily force, there is a danger that only
the tip of the saw rail will make contact with
the wood and there will thus be a rebound
(► Risk of rebound! – p. 54).
Felling a tree
DANGER! Risk of injury! Felling
and delimbing work may only be per-
formed by trained people! There is a
risk of fatal injuries!
A
Before beginning the felling work, make sure
that:
• there are no people or animals in the fell-
ing area of the tree.
• there is an obstacle-free escape route for
each participant. A retreat occurs diago-
nally counter to the felling direction.
• the area around the trunk is free of obsta-
cles (risk of stumbling!).
• the next workplace is at least two and a
half tree lengths away. Before felling, the
felling direction of the tree must be
checked and it must be ensured that
there are no objects, people or animals in
a distance of 2 1/2 tree lengths.
2
1
~5 cm
The felling of a tree occurs in two steps:
1. Notch the trunk by approximately one-
third of its diameter on the felling direc-
tion side.
2. On the other side, make the felling cut,
which must be somewhat higher than the
felling notch (approx. 3-5 cm).
DANGER! Risk of injury! Never saw
the tree trunk completely through.
The area serves as a "hinge" and
ensures a defined felling direction.
DANGER! Risk of injury! When fell-
ing, stand only to the side of the tree
to be felled! There is a risk of fatal
injuries!
Trunks lying flat on the ground
– Cut into the trunk halfway, then turn over
and saw through from the opposite side.
GB
B
45°
45°
B
55
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