Important Parts of a Chainsaw

Chainsaw Parts Essential for Operation and Safety

Here are 10 typical parts of a chainsaw identified and illustrated. Occupational Safety and Health Administration REQUIRES that the chainsaw ​have the parts identified in ​bold italic text. Chain saws placed into service after February 9, 1995 must also meet the requirements of ANSI B175.1-1991, Safety Requirements for Gasoline Powered Chain Saws.

01
of 10

Chain Catcher

chainsaw parts
chainsaw parts. OSHA

The Chain Catcher is a metal or plastic guard designed to prevent a broken or derailed saw chain from striking the operator. See figure 1 in the OSHA parts photo.

02
of 10

Flywheel

The flywheel is a weighted wheel that controls engine speed and assists in cooling the engine. See figure 2 in the OSHA parts photo.
03
of 10

Clutch

The clutch, attached to the chain sprocket, is the connector that controls the driving part of a saw. See figure 3 in the OSHA parts photo.
04
of 10

Decompression Valve

Chainsaw Parts
Chainsaw Parts. OSHA
The important decompression valve releases saw compression which allows easier starting. See figure 4 in the OSHA parts photo.
05
of 10

Anti-vibration Handle System

Chainsaw Parts
Chainsaw Parts. OSHA
The anti-vibration handle system of handle shocks is recommended by OSHA to limit ergonomic stress to the operator's hands, arms and joints. See figure 5 and 7 in the OSHA parts photo.
06
of 10

Hand Guard

Chainsaw Parts
Chainsaw Parts. OSHA
The hand guard is a defensive plastic shield that protects a users hands from kickback. See figure 6 in the OSHA parts photo.
07
of 10

Muffler

Chainsaw Parts
Chainsaw Parts. OSHA
The muffler is a hearing protection device used on chainsaws to reduce engine noise. See figure 8 in the OSHA parts photo.
08
of 10

Chain Brake

Chainsaw Parts
Chainsaw Parts. OSHA

Adding a chain brake to all saws was a safety requirement enabled in February, 1995. The function of the chain brake is to stop the chain if kickback occurs to prevent user injury. See figure 9 in the OSHA parts photo.

09
of 10

Throttle

Chainsaw Parts
Chainsaw Parts. OSHA

The throttle regulates a saw's RPMs by increasing or decreasing the volume of fuel to the cylinders. The chainsaw will stop the chain when pressure on the throttle is released. See figure 10 in the OSHA parts photo.

10
of 10

Throttle Interlock

Chainsaw Parts
Chainsaw Parts. OSHA

The throttle interlock locking mechanism prevents the throttle from activating until the interlock is depressed. See figure 11 in the OSHA parts photo.

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Your Citation
Nix, Steve. "Important Parts of a Chainsaw." ThoughtCo, Apr. 7, 2017, thoughtco.com/important-parts-of-a-chainsaw-1342751. Nix, Steve. (2017, April 7). Important Parts of a Chainsaw. Retrieved from https://www.thoughtco.com/important-parts-of-a-chainsaw-1342751 Nix, Steve. "Important Parts of a Chainsaw." ThoughtCo. https://www.thoughtco.com/important-parts-of-a-chainsaw-1342751 (accessed December 18, 2017).