Ryobi Outdoor CS1800 manual Glossary of Terms, Front Handle Guard

Front Handle

The support handle located at or toward the front of the chain saw.

Front Handle 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.

Guide Bar

A solid railed structure that supports and guides the saw chain.

Saw Chain

A loop of chain that has cutting teeth for cutting wood. It is driven by the motor and is supported by the guide bar.

Kickback

The backward and/or upward motion of the guide bar occurring when the moving chain contacts an object at the upper portion of the tip of the guide bar, or when the wood closes in and pinches the saw chain in the cut.

Kickback, Pinch

The rapid push back of the saw which can occur when the wood closed 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 top 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 ANSI B175-1-1991 when tested on a representative sample of chain saws.

Normal Cutting Position

Those positions assumed in performing the bucking and felling cuts.

Notching Undercut

A notch cut in a tree that directs the tree’s fall.

Felling

The process of cutting down a tree.

Felling Back Cut

The final cut in a tree felling operation, made on the opposite side of the tree from the notching undercut.

Oiler Control

A system for oiling the guide bar and saw chain.

Rear Handle

The support handle located at or toward the rear of the saw.

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 performance requirements of ANSI B175.1-1991 when tested with specific chain saws. It may not meet the ANSI perfor- mance requirements when used with other saws.

Switch

A device that when operated will complete or interrupt an electrical power circuit to the motor of the chain saw.

Switch Lockout

A movable stop that prevents the unintentional opera- tion of the switch until manually actuated.

Safe-T-Tip

An attachment that may be provided on the end of the guide bar to prevent the chain, on the end of the guide bar, from contacting the wood.

Drive Sprocket or Sprocket

The toothed part that drives the saw chain.

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