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CHAIN SAW TERMS AND DEFINITIONS
Bucking Process of cutting a felled tree
or log into lengths.
Felling Process of cutting down a tree.
Felling Cut
Final cut when felling a tree.
Make this cut on opposite side of tree from
notching cut.
Front Handle
Located at front of saw
body.
Front Hand Guard
Shield between front
handle and guide bar. Protects left hand
while using saw.
Guide Bar
Metal bar that extends from
saw body. The guide bar supports and
guides chain.
Guide Bar Nose
Tip or end of guide
bar.
Inner Pole
The moveable section of tubing
to which the saw is attached.
Kickback Quick backward and upward
motion of guide bar. Kickback may occur
when tip of guide bar touches an object while
chain is moving. The guide bar will kick up
and back towards operator.
Limbing
Process of cutting limb(s) from
a felled tree.
Low-Kickback Chain
Chain that reduces
chance of kickback as required by ANSI
B175.1.
Normal Cutting Position
Stance used
while making bucking and felling cuts.
Notching Cut
Notch cut in tree that di-
rects fall of tree.
Outer Pole
Retains the moveable inner
pole.
Power Head
Chain saw without chain and
guide bar. Also known as saw body.
Pushback (Kickback, Pinch)
Rapid
pushback of chain saw. Pushback may occur
if chain along top of guide bar is pinched,
caught, or contacts a foreign object.
Rear Handle
Handle located at rear of
saw body.
Reduced Kickback Guide Bar
Guide
bar that reduces chance of kickback.
Replacement Chain
Chain that complies
with ANSI B175.1 when used with a specific
saw. It may not meet ANSI requirements
when used with other saws.
Saw Chain (Chain)
Loop of chain hav-
ing cutting teeth for cutting wood. The
motor drives chain. The guide bar supports
chain.
Spiked Bumper (Spike)
Pointed teeth
at front of saw body beside guide bar. Keep
spiked bumper in contact with wood when
felling or bucking. It helps maintain position
of saw while cutting.
Sprocket Toothed wheel that drives
chain.
Switch Device that completes or interrupts
electrical circuit to motor of saw.
Switch Linkage
This device connects
switch to trigger. It moves switch when you
squeeze trigger.
Trigger Lockout
Device that reduces ac-
cidental starting of saw.
Trigger
Device that turns saw on and off.
Squeezing trigger turns saw on. Releasing
trigger turns saw off.
Trimming (Pruning)
Process of cutting
limb(s) from a living tree.
Undercut An upward cut from underside
of log or limb. This is done while in nor-
mal cutting position and cutting with top
of guide bar.