Hyper Tough HT19-401-003-11 Manuel De L'opérateur page 7

When the log is supported along its entire length as illustrated in Figure 3, it is cut from the top (overbuck),
avoid contacting ground as this will greatly reduce the chain sharpness.
Figure 3
When the log is supported on one end, as illustrated in Figure 4, cut 1/3 the diameter from the underside (
underbuck) (1). Then make the finished cut by overbucking (2) to meet the first cut.
2
1
1/3
2/3
Figure 4
When the log is supported on both ends, as illustrated in Figure 5, cut 1/3 the diameter from the top
(overbuck) (1). Then make the finished cut by underbucking (2) the lower 2/3 to meet the first cut.
2
1
1/3
2/3
Figure 5
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