Glossary Of Terms - Ryobi RY40509 Operator's Manual

Attachment Hook
Hook that enables the tool to be attached to a
rope or tool strap.
Automatic Oiler System
Lubrication is provided by the automatic oiler sys-
tem. The oiler is driven by the sprocket and adds
lubrication only when the chain is moving.
Bucking
The process of cross cutting a fallen tree or log
into lengths.
Chainsaw Power Head
A chainsaw without the saw chain and guide bar.
Drive Sprocket or Sprocket
The toothed part that drives the saw chain.
Hand Guard
A structural barrier between the front handle of a
chainsaw and the guide bar, typically located close
to the hand position on the front handle.
Front Handle
The support handle located at or toward the front
of the chainsaw. 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.

GLOSSARY OF TERMS

Lock-out Button
A movable stop that prevents the unintentional
operation of the switch until manually actuated.
Low-Kickback Chain
A chain that complies with the kickback perfor-
mance requirements of ANSI B175.1 when tested
on a representative sample of chainsaws.
Normal Cutting Position
Those positions assumed in performing the buck-
ing and pruning cuts.
Rear Handle
The support handle located at or toward the rear
of the saw. It normally contains the switch trigger.
This handle is for the right hand.
Reduced Kickback Guide Bar
A guide bar which has been demonstrated to
reduce kickback significantly.
Replacement Saw Chain
A chain that complies with the kickback perfor-
mance requirements of ANSI B175.1 when tested
with specific chainsaws. It may not meet the ANSI
performance requirements when used with other
saws.
Saw Chain
A loop of chain having cutting teeth that cut the
wood, and that is driven by the motor and is sup-
ported by the guide bar.
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.
Switch Trigger
A device that when operated will complete or
interrupt an electrical power circuit to the motor
of the chainsaw.
11 - English