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felling back cut so enough wood is left to act as a hinge. The hinge
wood keeps the tree from twisting and falling in the wrong
direction. Do not cut
through the hinge.
• (Figure Q) As the
felling cut gets close to
the hinge the tree
should begin to fall. If
there is any chance that
the tree may not fall in
the desired direction or
it may rock back and
bind the saw chain,
stop cutting before the
felling cut is complete
and use wedges to open the cut and drop the tree along the
desired line of fall. When the tree begins to fall remove the chain
saw from the cut, stop the motor, put the chain saw down, then
use the retreat path planned. Be alert for overhead limbs falling
and watch your footing.
Limbing (figure R)
Limbing is removing the
branches from a fallen
tree. When limbing, leave
larger lower limbs to
support the log off the
ground. Remove the
small limbs in one cut.
Branches under tension
should be cut from the
bottom up to avoid binding
the chain saw. Trim limbs
from opposite side
keeping tree stem between you and saw. Never make cuts with saw
between your legs or straddle the limb to be cut.
Bucking
Bucking is cutting a felled tree or log into lengths. How you should
cut depends on how the log is supported. Use a saw horse
(figure W) whenever possible.
Always start a cut with the chain running at full speed and the
ribbed bumper (7) in contact with the wood. To complete the cut
use a pivoting action of the ribbed bumper against the wood.
• (Figure S) When
supported along its
whole length
Make a cut from the
top (overbuck), but
avoid cutting the earth
as this will dull your
saw quickly.
• (Figure T) When
supported at
one end
First, cut 1/3 the
diameter from the
underside
(underbuck).
Then make the
finished cut by
overbucking to
meet the first cut.
Q
2 (5cm)
INCHES
DIRECTION
OF FALL
2 (5cm)
INCHES
HINGE
NOTCH
FELLING BACK
CUT
S
R
LIMB CUT
KEEP WORK OFF GROUND. LEAVE
SUPPORT LIMBS UNTIL LOG IS CUT
CUT FROM TOP
(OVERBUCK)
AVOID CUTTING
EARTH
1
1
2
T
2nd CUT
OVERBUCK (2/3
DIAMETER) TO
MEET 1st CUT (TO
AVOID PINCHING)
1st CUT UNDERBUCK (1/3
DIAMETER) TO AVOID
SPLINTERING
14