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Idiomas disponibles
Idiomas disponibles
BUCKING LOGS UNDER STRESS
See Figures 19 - 20.
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 underbuck-
ing. 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 pre-
vent the bar and chain from pinching.
When bucking on a slope, always stand on the uphill
side of the log as shown in figure 18. 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.
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.
OPERATION
22 - English
LOG SUPPORTED AT ONE END:
FINISHING CUT
LOG SUPPORTED AT BOTH ENDS:
LOAD
FINISHING CUT
OVERBUCKING
UNDERBUCKING
LOAD
1ST CUT
1/3 DIA
1ST CUT 1/3 DIA
Fig. 19
Fig. 20
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