A chainsaw that consistently pulls to one side or produces a curved cut usually has an imbalance somewhere in the chain-and-bar system. The most common causes are uneven sharpening and unequal cutter lengths, but guide-bar wear, incorrect chain fit, damaged drive components, poor tension, and inadequate lubrication can also contribute.
If the saw pulls hard, chatters, binds, overheats, or shows obvious chain damage, stop using it until the cause is identified.
Table of Contents
- Common causes of crooked cuts
- Check sharpening first
- Inspect the guide bar
- Verify chain fit, tension, and lubrication
- When to sharpen vs replace
- Replacement-chain examples
- FAQ
Common Causes of a Chainsaw Cutting Crooked
| Symptom | Likely cause | First check |
|---|---|---|
| Saw pulls strongly to one side | One side of cutters is sharper or longer than the other | Compare left- and right-hand cutters |
| Cut curves even with a freshly sharpened chain | Guide-bar rails may be uneven or groove worn | Inspect rail height, burrs, and side play |
| Chain feels loose sideways in the groove | Bar groove wear or incorrect chain gauge | Verify bar gauge and inspect groove wear |
| Chain runs hot or looks dry | Lubrication problem, excessive tension, or contamination | Check oil delivery, bar oil passages, and tension |
| Tracking remains poor after sharpening | Damaged drive links, sprocket wear, or bar damage | Inspect the complete drive system |
Check Sharpening First
Unequal cutter lengths
If cutters on one side have been filed shorter than cutters on the other, the chain can remove more wood on one side of the kerf. The saw then tends to steer toward the side doing less effective cutting.
One side is sharper than the other
Hand filing can become asymmetric because most operators find one filing direction easier. Compare cutter condition on both sides and use consistent filing pressure, angle, and stroke count.
Depth gauges must be consistent too
Even with equal cutter lengths, inconsistent depth gauges can change how aggressively individual cutters bite. Service them using the chain manufacturer's specified gauge and procedure.
Inspect the Guide Bar
A correctly sharpened chain can still cut crooked if the bar no longer guides it squarely.
- Look for burrs or mushrooming on the bar rails.
- Compare rail wear on both sides.
- Check the groove for excessive side clearance.
- Inspect the bar nose and nose sprocket where applicable.
- Keep the oil holes and groove clean.
If the bar manufacturer recommends periodic bar flipping for your model, doing so can help distribute normal rail wear. Follow the bar or saw manual rather than using a universal interval.
Verify Chain Fit, Tension, and Lubrication
A replacement chain must match the required pitch, gauge, and drive-link count. Gauge is especially relevant to tracking: a chain that is not correctly matched to the guide-bar groove cannot be expected to run accurately.
Set chain tension according to the saw manufacturer's procedure. A chain that is too loose can track poorly or derail; a chain that is too tight creates heat and accelerated wear.
Also confirm that bar-and-chain oil is reaching the chain. Poor lubrication can accelerate uneven rail, drive-link, and sprocket wear.
When to Sharpen and When to Replace
Sharpening can correct normal dullness and moderate cutter-length differences. Replacement is the better option when cutters are badly damaged, near their wear limits, rivets or drive links are damaged, or the chain still cannot track correctly after proper sharpening and inspection of the bar and sprocket.
Do not install a new chain on a severely worn bar or sprocket and expect the tracking problem to disappear. Treat the chain, guide bar, and drive sprocket as a system.
Replacement-Chain Examples by Specification
ALBO 16 Inch 3/8"LP .043" 55DL Chainsaw Chain — 3 Pack
A replacement option for compatible 16-inch systems requiring .043 gauge and 55 drive links.
View Product
ALBO 14" 3/8"LP .050" 52DL Full Chisel Chain — 3 Pack
A 14-inch replacement set for saws specified for this exact pitch, gauge, and drive-link count.
View Product
ALBO 20" 3/8" Pitch .050" 72DL Full Chisel Chain
A 20-inch single-loop option for compatible standard 3/8-pitch setups.
View Product
ALBO 18 Inch .325" Pitch .063" Gauge 68DL Chain
An example of why bar length alone is insufficient: this chain uses a different pitch and gauge family.
View ProductReplace the Chain by Specification, Not Guesswork
Confirm pitch, gauge, and drive-link count on the bar or saw documentation before selecting a replacement.
Shop Chainsaw ChainFAQ
What is the most common reason a chainsaw cuts to one side?
Uneven sharpening is a common cause, especially when cutters on one side are sharper or longer than cutters on the other side.
Can a worn bar make a new chain cut crooked?
Yes. Uneven bar rails or an excessively worn groove can allow poor tracking even with a new, correctly sharpened chain.
Should every cutter be exactly the same length?
They should be kept reasonably consistent according to the chain manufacturer's sharpening procedure. Major left-to-right differences can cause uneven cutting.
Can wrong chain gauge cause side-to-side movement?
Yes. The chain gauge must match the guide-bar groove specification. Excessive groove wear can also create side play even with the nominally correct chain.
Should I keep using a chain that pulls hard to one side?
No. Stop and inspect the chain, bar, tension, lubrication, and drive system. Binding or severe pulling can indicate a condition that needs correction before further cutting.
Safety note: Disconnect the spark plug or battery as directed by the saw manufacturer before handling or servicing the chain. Wear appropriate PPE and follow the saw, guide-bar, and chain manufacturer's instructions.
