5 Mechanical Timber Harvesting Handbook
Chain Catcher
A chain catcher prevents a saw chain that has escaped from the
bar groove from being “thrown” from the saw box. Chain catchers
resemble a sturdy spool and are placed in line with the drive
sprocket. A small gap on one side of the chain catcher allows
installation and removal of the saw chain.
Chain Shot Guard
A chain shot guard is a piece of material mounted behind the drive
sprocket; it performs two functions:
1. It absorbs the energy of a broken saw chain coming into
contact with the saw box, reducing the risk of ejected parts
during a chain shot event.
2. It acts as an extension of the saw box, reducing the risk of a
thrown loop of saw chain (or saw chain parts) escaping the
saw box.
Important Safety Information
Chain
catcher
Chain shot guard
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