The practical guide
How to find the right replacement chainsaw chain
Bar length is only the starting point. Match the chain specification and the approved cutting attachment before ordering a replacement.
Record the pitch, gauge and drive-link count, then confirm the complete chain is approved for your saw, guide bar and sprocket. Two chains described as the same bar length can still be incompatible.
The three numbers to record
Scroll sideways to see the full comparison.
| Specification | What you are matching |
|---|---|
| Pitch | The chain's spacing. It must match the sprocket and the guide bar's requirements. |
| Gauge | The thickness of the drive link that runs in the bar groove. Match the bar specification exactly. |
| Drive-link count | The number of drive links in the loop, which determines its length. This is not the number of cutting teeth. |
Keep any suffix in the specification. For example, do not shorten a marking such as 1/4-inch P to an assumed equivalent. Chain design and the manufacturer's approved combinations still matter after the basic dimensions match.
Use the saw and bar information together
Find the saw's exact model, the guide-bar part number and its stamped specifications, and the old chain's part number or packaging if available. A replacement bar may differ from the one originally supplied with the saw.
Before examining the cutting attachment, stop the saw and isolate its power as directed by the manual. Wear protective gloves around the chain. If markings are unreadable or the installed parts are uncertain, have a dealer identify them rather than guessing from a photo or nominal bar length.
A small difference that changes the fit
Interline lists STIHL 71PM356E and 71PM364E chains. Both listings specify 1/4-inch P pitch and .043-inch gauge. One has 56 drive links; the other has 64. That difference changes the loop length, so these are not interchangeable choices for the same unchanged cutting attachment.
These links illustrate the specifications. They are not a recommendation for your saw until the complete approved combination has been confirmed.
A useful checklist for the counter
- Saw make and exact model.
- Guide-bar part number and stamped specification.
- Chain pitch, gauge and drive-link count.
- Existing chain part number or packaging, if known.
- Confirmation that the chain design is approved for the saw, bar and sprocket.
A new chain will not fix a worn or damaged bar or sprocket. Ask for an inspection if you are unsure of their condition. Have installation and tension checked against the saw's instructions before use; this identification guide is not a fitting procedure.
For local help, use Interline's service information and contact details.
