Logging eTool
Chain Saw » Parts of a Chain Saw
Typical parts of a chain saw are identified in the following picture.
OSHA REQUIRES that the chain saw have the parts identified in bold text. [29 CFR 1910.266(e)(1) and (e)(2)] 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.
1
Chain catcher to prevent a broken or dislodged chain from striking the logger.
2
Flywheel
3
Clutch
4
Decompression valve
5-7
Anti-vibration handle system is recommended by OSHA to limit ergonomic stress to the logger's joints.
6
Hand guard
8
Muffler to reduce engine noise.
9
Chain brake to stop the chain if kickback occurs, if the saw was placed into service after February 9, 1995.
10
Throttle which will stop the chain when pressure on the throttle is released.
11
Throttle interlock which prevents the throttle from activating until the interlock is depressed.
Checklist for Field Use: Chain Saw
Additional Information:
- 29 CFR 1910 Subpart R, Special industries. OSHA Standard.
- 1910.266(e)(2), Chain saws