Stihl MS 251 Manual De Instrucciones página 20

English
Conventional Cut
C
C
Felling notch (C) – determines the
direction of the fall
For a conventional cut:
Properly place felling notch
N
perpendicular to the line of fall,
close to the ground.
Cut down at approx. 45° angle to a
N
depth of about 1/5 to 1/4 of the trunk
diameter.
Make second cut horizontal.
N
Remove resulting 45° piece.
N
18
Open-face Technique
Felling notch (C) – determines the
direction of the fall
For an open-face cut:
Properly place felling notch
N
perpendicular to the line of fall,
close to the ground.
Cut down at approx. 50° angle to a
N
depth of approx.1/5 to 1/4 of the
trunk diameter.
Make second cut from below at
N
approx. 40 degree angle.
Remove resulting 90° piece.
N
Making Sapwood Cuts
For medium sized or larger trees
N
make cuts at both sides of the trunk,
at same height as subsequent
felling cut.
Cut to no more than width of guide
N
bar.
This is especially important in softwood
in summer – it helps prevent sapwood
splintering when the tree falls.
MS 251, MS 251 C