Ryobi RCS4246B Operator's Manual page 11

Felling Back Cut
the final cut in a tree felling operation made on the
opposite side of the tree from the notching undercut.
Front Hand Guard
a structural barrier between the front handle of a chain
saw and the guide bar, typically located close to the hand
position on the front handle, and sometimes employed as
an activating lever for a chain brake.
Front Handle
the support handle located at or toward the front of the
chain saw. this handle is for the left hand.
Guide Bar
a solid railed structure that supports and guides the saw
chain.
kickback
the backward or upward motion, or both, of the guide bar
occurring when the saw chain near the nose of the top
area of the guide bar contacts any object such as a log or
branch, or when the wood closes in and pinches the saw
chain in the cut.
kickback (Pinch)
the rapid pushback of the saw which can occur when the
wood closes in and pinches the moving saw chain in the
cut along the top of the guide bar.
kickback (Rotational)
the rapid upward and backward motion of the saw which
can occur when the moving saw chain near the upper
portion of the tip of the guide bar contacts an object, such
as a log or branch.
Low-kickback Chain
a chain that complies with the kickback performance
requirements of IsO 9518 when tested on a
representative sample of chain saws.
Normal Cutting Position
the positions assumed in performing the bucking and
felling cuts.
Notching Undercut
a notch cut in a tree that directs the tree's fall.
Rear Handle
the support handle located at or toward the rear of the
saw. It normally contains the throttle. this handle is for
the right hand.
Reduced kickback Guide Bar
English
a guide bar which has been demonstrated to reduce
kickback significantly.
Replacement Saw Chain
a chain that complies with the kickback performance
requirements of IsO 9518 when tested with specific chain
saws.
Saw Chain
a loop of chain having cutting teeth that cut the wood
and that is driven by the motor and is supported by the
guide bar.
Skating
When the chain saw fails to dig in during a cut, the guide
bar will begin hopping or dangerously skidding along the
surface of the log or branch, possibly resulting in the loss
of control of the chain saw. the sideward motion of the
guide bar can increase the risk of kickback. to prevent
or reduce this skating, hold the chain saw with two hands
and make sure the saw chain establishes a groove for
cutting.
Springpole
a small tree (sapling) or limb that is bent or trapped under
tension. It may "spring back" rapidly when cut, causing a
dangerous situation.
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