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How to count drive links
The drive-link count is the third number you need, after pitch and gauge. It takes a minute with a piece of chalk.
Drive links are the tang-shaped links on the underside of the chain — the ones that ride inside the bar groove and engage the sprocket. Cutters and tie straps on top do not count.
- Lay the loop flat, or keep it on the bar with the cover off.
- Mark one drive link with chalk or a marker.
- Count every drive link around the loop until you get back to the marked one. Count the marked link once.
- That total is the number on the box: a “72” loop has 72 drive links regardless of brand.
Full verification guide: bar stamps, pitch measurement and gauge checks →
Questions
What are drive links on a chainsaw chain?
Drive links are the tang-shaped links on the underside of the chain. They ride inside the bar groove and engage the drive sprocket. Cutters and tie straps on top are not drive links and are not counted.
Do I count cutters or drive links?
Count drive links only — the tangs that drop into the bar groove. Cutters (the teeth) are a different number and are not what the chain box or bar stamp quotes.
Is the drive-link count enough to buy a chain?
No. The count must be combined with pitch and gauge. Two chains with the same count but different pitch or gauge are not interchangeable. Read the stamp on your bar tail and match all three numbers.
Always confirm pitch and gauge as well — see how to verify your chain size and the identification chart.