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Page 36 of 80
Felling
WARNING!
Unless you have special training we advise you not to fell trees
with a diameter larger than the bar length of your saw!
Directional cuts
To make the directional cut you begin with the top cut. Aim using to the saw’s felling direction mark
(1) toward a goal further forward in the terrain, where you would like the tree to fall (2). Stand on
the right-hand side of the tree, behind the saw, and cut with a pull stroke.
Next make the bottom cut so that it ends exactly at the end of the top coat.
The directional cuts should run 1/4 of the diameter through the trunk and the angle between the
top cut and bottom cut should be 45°.
The line where the two cuts meet is called the directional cut line. This line should be perfectly
horizontal and at right angles (90°) to the chosen felling direction
Felling cut
The felling cut is made from the opposite side of the tree and it must be
perfectly horizontal. Stand on the left side of the tree and cut on the pull
stroke. Make the felling cut about 3-5 cm (1.5-2 inches) above the bottom
directional cut. Set the spike bumper (if one is fitted) just behind the felling
hinge. Use full throttle and advance the chain/bar slowly into the tree. Make
sure the tree does not start to move in the opposite direction to your
intended felling direction.
Finish the felling cut parallel with the directional cut line so that the distance
between them is at least 1/10 of the trunk diameter.
The uncut section of the trunk is called the felling hinge. The felling hinge
controls the direction that the tree falls.
All control over the felling direction is lost if the felling hinge is too narrow
or non-existent, or if the directional cuts and felling cut are badly placed.
When the felling cut and directional cut are complete the tree should start
to fall by itself or with the aid of a felling wedge or breaking bar.
We recommend that you use a bar that is longer than the diameter of the
tree,
There are methods for felling trees with a diameter larger than the bar
length. However, these methods involve a much greater risk that the
kickback zone of the bar will come into contact with the tree.