Chain Shot Primer

摘要

While the risk of a chain shot euent can't be eliminated, it can be reduced by following some simple operational recommendations. "Chain shot" is not a new term to the forestry industry. However, events within the last two years have brought this termto the forefront of our industry. Chain shot is the high-velocity separation and ejection of a piece or pieces of saw chain from the end of a broken loop of saw chain in mechanized timber harvesting. Chain shot typically originates near the drive end ofthe cutting system, but can also originate from the guide bar tip area. In either case, it poses the same risk of serious injury or death to the machine operator, ground personnel and bystanders. Saw chain pieces usually travel in the cutting plane of the guide bar, but can deviate to either side. Although the shot cone (a term used by Oregon) reflects the most likely chain shot path, deflection can occur, substantially expanding the distance saw chain pieces may travel.