Jonsered CS 2125T Manual De Instrucciones página 142

Directional cuts
To make the directional cuts you begin with the top cut. Try
to take your position in the tree on the right side and cut
on the pull stroke.
Next make the bottom cut so that it finishes exactly at the
end of the top cut.
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. Try to take a correct
position so you are able to cut on the pull stroke.
Make the felling cut about 3-5 cm (1.5-2 inches) above the
bottom directional cut.
142 – English
WORKING TECHNIQUES
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-top 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 in.
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.
We recommend that you use a bar that is longer than the
diameter of the tree, so that you can make the felling cut
and directional cuts with single cutting strokes. See the
Technical data section to find out which lengths of bar are
recommended for your saw.