Notching undercut:
Make the notch (X-W) 1/3 the diameter of the tree, perpendicular to the direction of falls
as make the lower horizontal notching cut first. This will help to avoid pinching either the saw chain or the
guide bar when the second notch is being made.
Felling back cut:
Make the felling back cut (Y) at least 50 mm higher than the horizontal notching cut. Keep the
felling back cut parallel to the horizontal notching cut. Make the 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. As the felling gets close to the hinge the tree should begin to fall. If there is any chance that the tree
may not fall in desired direction or it may rock back and bind the saw chain, stop cutting before the felling back
cut is complete and use wedges of wood, plastic, or aluminum 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 cutting, stop the motor, put
the chain saw down, and then use the retreat path planned. Be alert for overhead limbs falling and watch your
footing. To complete the felling operation, drive a wedge (Z) into the horizontal cut. Beware of falling branches
when the tree starts to move.
LIMBING A TREE
Limbing is removing the branches from a fallen tree. When limbing, use larger lower limbs to support the log
off the ground. Remove the small limbs in one cut as illustrated. Branches under tension should be cut from
the bottom up to avoid binding the chainsaw.
BUCKING A LOG
Bucking is cutting a log into lengths. It is important to make sure your footing is firm and your weight is evenly
distributed on both feet. When possible, the log should be raised and supported by the use of limbs, logs or
chocks. Follow the simple directions for easy cutting.
When the log is supported along its entire length as illustrated, it is cut from the top (overbuck).
When the log is supported on one end, as illustrated below, cut 1/3 the diameter from the underside
(underbuck). Then make the finished cut by overbucking to meet the first cut.
When the log is supported on both ends, as illustrated, cut 1/3 the diameter from the top overbuck. Then
make the finished cut by underbucking the lower 2/3 to meet the first cut.
