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11 Operating the Saw

E Felling cut

The tree is felled with the felling cut. The felling cut is

1/10 of the trunk diameter (at least 3 cm) above the

bottom of the felling notch.

F Stabilizing strap

The stabilizing strap supports the tree and helps prevent

it from falling prematurely. The width of the stabilizing

strap is 1/10 to 1/5 of the trunk diameter.

G Holding strap

The holding strap supports the tree and helps prevent it

from falling prematurely. The width of the holding strap is

1/10 to 1/5 of the trunk diameter.

11.4.4 Cutting the felling notch

The felling notch determines the direction in which the tree

falls. Country-specific standards for making the felling notch

must be observed.

► Position the saw so that the felling notch is an right angles

to the direction of fall and the saw is close to the ground.

► Make the horizontal cut.

► Make the angle cut at 45° to the horizontal cut.

► If the wood is sound and long-fibered: Observe the

following points when making sapwood cuts:

– The cuts must be the same at both sides.

– The cuts must be at the same height as the bottom of

the felling notch.

– The width of the cuts is 1/10 of the trunk diameter.

The trunk does not splinter when the tree falls.

11.4.5 Plunge cutting

Plunge cutting is a technique required for felling.

► Begin cut with the lower portion of the guide bar nose –

with chain running at full speed.

► Cut until depth of kerf is twice the width of the guide bar.

► Swing the saw into plunge-cutting position.

► Perform the plunge cut.

90°

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