Pitch:
Defines the distance between the chain’s drive links. It is measured as the distance between any three consecutive rivets, divided by two. Common pitch sizes include:
- 1/4-inch – Small chains used for light pruning and carving.
- .325-inch – Common for mid-sized saws used in forestry and general cutting tasks.
- 3/8-inch – The most common size used for professional and heavy-duty cutting.
- .404-inch – Designed for the most powerful chainsaws used in logging and tree-felling.
Gauge:
Refers to the thickness of the drive links that fit into the guide bar groove. Common gauges include:
- .043 inch (1.1mm) – Light-duty chains for small chainsaws.
- .050 inch (1.3mm) – The most common gauge for general-purpose use.
- .058 inch (1.5mm) – Found in professional-grade chainsaws for tougher cutting.
- .063 inch (1.6mm) – Used in heavy-duty and industrial logging applications.
Number of Drive Links
The number of drive links determines the chain’s overall length and ensures compatibility with the guide bar. It is critical to match the exact number of drive links specified by the chainsaw manufacturer.