Types Of Cutting - Craftsman 138.98946 Operator's Manual

[] When bucking on a slope, always stand
on the uphill side of the log. To maintain
complete control of the chain saw when
cutting through the log, release the cutting
pressure near the end of the cut without
relaxing your grip on the chain saw handles.
Do not let the chain contact the ground. After
completing the cut, wait for the saw chain to
stop before you move the chain saw. Always
stop the motor before moving from tree to
tree.
[] Sometimes it is impossible to avoid pinching
(with just standard cutting techniques) or
difficult to predict which way a log will settle
when cut. To avoid pinching while cutting,
rotate or move the log so that the pinch is
eliminated.
TYPES OF CUTTING USED
See figure 20.
OVERBUCKING
Begin on the top side of the log with the bottom
of the saw against the log; exert light pressure
downward. Note that the saw will tend to pull
away from you.
UNDERBUCKING
Begin on the under side of the log with the top
of the saw against the log; exert light pressure
upward. During underbucking, the saw will
tend to push back at you. Be prepared for this
reaction and hold the saw firmly to maintain
control.
BUCKING LOGS UNDER STRESS
See figure 19.
When the log is supported along its entire
length, it should be cut from the top or
overbucking.
When the log is supported on one end,
cut 1/3 the diameter from the underside or
underbucking. Then make the finishing cut by
overbucking to meet the first cut.
As the log is being cut, it will tend to bend. The
saw can become pinched or hung in the log if
you make the first cut deeper than 1/3 of the
diameter of the log.
Give special attention to logs under stress to
prevent the bar and chain from pinching.
When bucking on a slope, always stand on
the uphill side of the log.
When "cutting through," to maintain complete
control of the chain saw, release the cutting
pressure near the end of the cut without relaxing
your grip on the chain saw handles. Do not let
the chain contact the ground. After completing
the cut, wait for the saw chain to stop before
you move the chain saw. Always stop the motor
before moving from tree to tree.
17 - English