Bar and Chain

Bow Bar

An elliptiacal saw chain guide bar used for brush cutting. Its use is not suitable for falling or bucking wood over 8 inches in diameter. The bow bar is NO LONGER APPROVED by manufacturers for use on current chain saws.

Chain

Picture
The chain is made up of cutters rivetted together and rides through the guides on the bar of the chainsaw.

Chain Brake

Illustration of a Chain Brake
Chain Brake
The chain brake is a safety device which stops the saw chain.

Guide Bar

Illustration of a Chain Saw Guide Bar
Guide Bar
The long, thin projection of the chan saw upon which the saw chain travels. Improper use of the bar results in kickback and saw cuts. It is the extreme top and bottom of the chain saw bar's tip that is sensitive.

Tooth

Picture
The chain is made up of multiple teeth that cut the wood.  These must be maintained and sharpened.