§ How-To
How to Match a Bar-and-Chain Combo to Your Saw
Buying the bar and chain together removes the gauge-matching guesswork. Here's what still has to line up with your powerhead — and how to confirm it.
A bar-and-chain combo is the easiest way to re-cut your saw with confidence: because the bar and chain are paired at the factory, the chain’s gauge already matches the bar groove and its drive-link count already matches the bar length. That eliminates the two most common mismatches in one purchase. What a combo can’t do is guarantee it fits your powerhead — that’s still on you to confirm. Here’s the short checklist.
Confirm three things against the saw
1. Mount pattern (the dealbreaker)
The bar’s mounting slot, stud spacing, and oil-feed hole position are designed for a specific family of saws. This is brand- and often model-specific: a STIHL small-mount bar will not bolt to a Husqvarna, and even within one brand the mount changes between homeowner and pro saws. Always match the combo to your saw model, not just to its cutting specs. Every combo we list shows its fitment list — find your exact model there.
2. Pitch must match the drive sprocket
Your saw already has a drive sprocket of a certain pitch (3/8” LP, .325”, 3/8”, etc.). The combo’s chain pitch must match it. If you want to switch pitch — say from .325” to 3/8” — you also have to replace the sprocket (see How to Replace a Sprocket or Clutch Drum). For a straight replacement, keep the pitch you already run.
3. Stay within the saw’s max bar length
Every powerhead is rated to pull a maximum bar length. A 50cc saw will happily run a 16–18” bar; hang a 24” bar off it and it bogs in the cut, overheats the clutch, and wears the chain unevenly. Match (or stay under) the manufacturer’s recommended bar length for your saw.
What the combo handles for you
Once those three line up, the internal matching is done:
- Gauge: the chain gauge equals the bar groove width — no measuring.
- Drive-link count: the loop is cut to the right number of links for that exact bar and nose sprocket.
Installing the new combo
With the right combo in hand, fitting it is a ten-minute job — cover off, chain over the sprocket and around the bar with the cutters facing forward, tension set, oil checked. The full procedure is in How to Install a New Chainsaw Chain.
When a combo is the smart buy
- You’re not 100% sure your old chain’s gauge matches the bar.
- You’re replacing a worn bar and a stretched chain at the same time (you should — a new chain on a hooked old bar wears fast).
- You want one part number to reorder instead of two.
Browse bar-and-chain combos, or shop by your saw on the Brands page.
§ Parts
