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TYPES OF CUTTING
HillIIII II I
A. BASIC CUTTING TECHNIQUE
1. IMPORTANT POINTS.
a. Cut wood only, Do not cut metal, plastics,
ma._nr'f,non-woodbuildingmaterials,etc:Donot
useyoursawtopryorshoveawaylimbs,roots,or
otherobjects.
b. Stop the saw tf the chain strikes a foreign
object. Inspect the unitand repair or replace
partsasnecessary.
c. Keep the chain out of dirt and sand. Evena
smallamountofdirtwillquick_ dulla chainand
increasethepossibilityofkickbacl_
A KICKBACK WARNING
Kickbackcan occurwhen the moving chaincontactsan
object st the upper portion of the tip ofthe guide bar or
when the wood closes in and pinches the saw chain in
the cut. Contact at the upper portion of the tip of the
guide barcan causathe chsin todig intotheobject and
stop the chain foran instant. The result is s lightning
fast, reveme reaction which kicks theguide bar upand
back toward the operator. If the saw chain is pinched
along the top of the guide bar, the guide bar can be
drivenrapidlybacktowardtheoperator. Eitherof these
reactions can cause loss of saw control which can
result in serious/injury.
2. UNDERSTAND REACTIVE FORCES
Pinch-Kickback and Pult-ln occur when the chain
issuddenly stopped by being pinched, caught, or
by contacting a foreign object in the wood. This
resultsina reversalofthechainforceusedtocutwood
•andcausesthesawtomoveintheoppositedirectionof
chainrotation.Eitherreactioncanresultinloss ofcon-
trotand aossibleserious personalinjury.
• Pinch-Kickback
-- occurswhenthe chainontopofthebar issuddenly
stoppedwhenthe topofthe barisusedforcuing.
-- rapidly drives the saw straightback towardthe
I I I I IIIlll I II I I Illl IJll
3. PROCEDURE
Practk_cuttingalewsmalltogsusingthefo_wing ted-,ni-
quetogetthe'feel"ofusingyoursawbeforeyoubegina
maw sawingoperation.
a. Accelerate the engine to full throttle Justbefore
entering the cut bysqueezingthe throttletrigger.
b. Begincutting thewith spuragainstthe log. Figure
16
c. Runthe engineat fullthrottle theentiretimeyou are
cutting.
d. Allow the chain to cut for you; exert only light
downward pressure. Ifyouforce the cut, damageto
the bar,chain,orengine canresult.
e. Release the throttle trigger as soon as the cut is
completed, allowingthe enginetoidle.Ifyourunthe
sawat full throttlewithouta cuttingload,unnecessary
wear can occurtothechain, bar,andengine.
f. Donot put pressureonthesawat theend ofthe cut
toavoid!osingcontre!when thecutiscomplete.
g. Stopthe engine before setting the saw downafter
cutting.
12
• Pull-In
-can occur when the chain on the bottom ofthe
bar is suddenly stopped.
- pulls thesaw rapidlyforward.
B. TREE FELLING TECHNIQUES
Figure 16
=
PLAN YOUR SAWING OPERATION CARE-
FULLY IN ADVANCE
a. Clear the work area. Youneed a clear areaall
around the tree where you can have secure
footing.
b. Study the natural conditions that can cause
the tree to fall in a particular direction:
1.) The WIND directionand speed.
2.) The LEAN ofthe tree.
3.) WEIGHTED with BRANCHES on oneside.
4.) SurroundingTREES andOBSTACLES.
c. Look for decay and rot. Ifthe trunkis rotted,
itcould snap and fall towardtheoperator.
d. Check for broken or dead branches which
could fal!on youwhile cutting.
e. Makesure there isenough roomfor thetreeto
fall. Maintainadistance21/2treelengthsfromthe
nearestpersonorotherobject.Engine noisecan
drownouta warningcall.
f. Remove dirt, stones, loose bark, nails,
staples, and wire from the tree where cuts
are to be made.
g. Plan rostand on the up-hill side when cut-
ting on a slope. Figure 16.
h. Plan s clear retreat path to the rear and
diagona! to the line of fall. Figure 17.
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