Instruction Manual

Checking the direction of fall
The bottom cut and top cut must meet in a con‐
tinuous straight sink chord.
001BA243 KN
► Position the meter stick at the pivot point of
the sink chord – the tip of the meter stick must
point in the direction of the specified direction
of fall – where necessary, correct the direction
of fall by cutting the felling notch accordingly
4.4 Sapwood cuts
001BA150 KN
Sapwood cuts in long-fibered softwood help pre‐
vent sapwood splintering when the tree falls.
Make cuts at both sides of the trunk at same
height as bottom of felling notch to a depth of
about 1/10 of trunk diameter. On large diameter
trees, cut to no more than width of guide bar.
Do not make sapwood cuts if wood is diseased.
4.5 Basic information on felling cut
Basic dimensions
001BA259 KN
G
E
C
C
Ø
1/10
The felling notch (C) determines the direction of
fall.
The hinge (D) functions like a real hinge to guide
the tree to the ground.
–
Width of hinge: approx. 1/10 of the trunk diam‐
eter
–
Never saw through the hinge while felling –
otherwise the tree will fall in a direction other
than the one planned – risk of accident!
–
With rotten trunks, leave a wider hinge
The tree is felled with the felling cut (E).
–
Cut horizontally
–
1/10 (min. 3 cm) of the width of the hinge (D)
across the bottom of the felling notch (C)
The holding wood (F) or safety strip (G) supports
the tree and secures it against premature falling.
–
Width of strip: approx. 1/10 to 1/5 of the trunk
diameter
–
Do not cut into the strip during the felling cut
–
With rotten trunks, leave a wider strip
Plunge cutting
–
For relieving cuts during shortening
–
For wood carving
001BA269 KN
3.
1.
2.
► Use a low kickback saw chain and proceed
with special care
1.Begin cut by applying the lower portion of the
guide bar nose – do not use upper portion
because of risk of kickback. Cut at full strength
until the depth of the kerf is twice the width of the
guide bar2.Swing the machine slowly into the
plunge cutting position – risk of kickback and
pushback!3.Make the plunge cut very carefully.
Risk of pushback.
English 4 Working Techniques
12 0458-506-0121-B