Gunning Sight; Conventional Cut; Open-Face Technique - Stihl 9 Instruction Manual

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When making the felling notch, use the
gunning sight on the shroud and housing
to check the required direction of fall:
•
Position the saw so that the
gunning sight points exactly in the
direction you want the tree to fall.
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felling notch - determines the
direction of the fall
For a conventional cut:
•
Properly place felling notch
perpendicular to the Iine of fall,
close to the ground
•
Cut down at app. 45-degree angle
to a depth of about 1/5 to 1/4 of the
trunk diameter
•
Make second cut horizontal
•
Remove resulting 45-degree piece
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$ = felling notch - determines the
direction of the fall
For an open-face cut:
•
Properly place felling notch
perpendicular to the Iine of falI,
close to the ground
•
Cut down at app. 50-degree angle
to a depth of app.1/5 to 1/4 of the
trunk diameter
•
Make second cut from below at
app. 40 degree angle
•
Remove resulting 90-degree piece