Chainsaw Cutting Right (Bar & Chain Fixes)
A chainsaw that cuts to the right usually has uneven cutters, a bar problem, or a chain that does not fit or run correctly. Stop cutting and inspect it with the engine off. Check both sides of the chain first, then the depth gauges, bar rails, chain fit and sprocket. Fix the cause before making a careful test cut.
If your saw keeps steering right, do not push harder or twist the handle to correct it. That can bind the chain and make the saw harder to control. Shut it down, let the chain stop, and work through the checks below. Many causes are visible on the bench, so you can narrow the problem before buying parts.
Start with safety and a clear diagnosis
A right-steering cut means the saw does not travel straight through the wood during a normal cut. The cause is often uneven sharpening, but a worn or bent bar, poor chain fit, or sprocket wear can also pull the cut off line. Inspect the saw before cutting again; do not try to steer it straight with force.
Put on a helmet, eye and face protection, hearing protection, chainsaw-rated leg protection, gloves, and protective boots. Check your footing, overhead hazards, bystanders, and escape path. Follow applicable ANSI Z133 guidance, and OSHA 29 CFR 1910.266 for covered logging work.
With the engine off and cool, engage the chain brake before inspecting the chain. Keep hands clear of the cutters. Check the brake, throttle lockout, trigger return, chain catcher, handles, and other safety devices. Take the saw out of service if a safety device fails.
A chain that comes off the bar is an immediate stop-work condition. Shut the saw off, wait for all movement to stop, and find the cause before restarting.
Check sharpening symmetry and depth gauges first
A cutter is the sharp, hooked tooth that removes wood. If cutters on one side are shorter, duller, or filed at a different angle than those on the other, the chain can cut unevenly and steer. Depth gauges, often called rakers, control how much wood each cutter takes; they need to match the chain maker’s specification.
Look closely at the left- and right-facing cutters. Check for chipped or damaged edges, then compare cutter length and filing angle across both sides. If one side is noticeably shorter or more damaged, the chain may pull toward the weaker side. Sharpen both sides to the chain manufacturer’s angle and length instructions, using the correct file size.
Next, check the depth gauges with the maker’s gauge tool. A setting of .025 in (0.635 mm) is common on many chains, but it is not a universal setting. Use the chain maker’s specification and tool. Do not lower the gauges beyond spec: cutters can bite too deeply, making the saw aggressive and increasing kickback risk.
| What you find | Likely issue | Next step |
|---|---|---|
| Unequal cutter lengths or angles | Uneven sharpening | Sharpen both sides to the chain maker’s specs |
| Damaged cutters | Impact or worn chain | Replace the chain if damage cannot be corrected within spec |
| Rakers vary or sit too low | Incorrect depth-gauge setting | Check and set with the specified gauge tool |
| Chain still pulls after sharpening | Bar, fit, or sprocket issue | Continue the inspection |
Do not force a dull or uneven chain through wood. It creates extra heat and wear, and it can make the saw harder to control. If you cannot restore even cutters within the chain maker’s limits, replace the chain.
Inspect the bar rails, groove, and nose
The guide bar is the metal track that supports the chain. Its rails are the two edges that guide the chain around the bar. If the rails are uneven, worn, burred, or bent, the chain may not track straight. A dirty groove or blocked oil passage can also affect chain movement and lubrication.
With the saw off, remove the bar and chain as directed in the manual. Clean debris from the bar groove and oil holes. Check both rails for burrs, uneven wear, cracks, and damage. Inspect the bar nose for damage or unusual wear. A visibly bent bar or uncertain structural damage needs assessment by a qualified service provider.
Some bars can be turned to spread wear, but only if the bar maker allows it. Dress rails only within the maker’s service limits. Replace a cracked bar, an excessively worn bar, or one that cannot hold alignment.
Typical diagnostic example: A chain is sharpened evenly, but the saw still drifts. The bar shows uneven rail wear, and the chain sits poorly in the groove. In that case, more sharpening will not correct the underlying bar problem. Inspect or replace the bar according to its maker’s instructions, then retest safely.
Confirm chain fit, tension, and sprocket condition
The chain, bar, and drive sprocket must match the saw. Pitch is the chain’s size class, gauge is the thickness of its drive links, and drive-link count is the number of links that run inside the bar groove. All three must match the bar and sprocket specifications.
Check the bar markings and the saw manual before buying parts. For example, 3/8-in low-profile pitch and .050-in gauge is a common combination, not a universal fit. Confirm the drive-link count and sprocket compatibility as well. Use only a bar and chain approved for your make and model.
Check that the chain is installed in the correct direction and tensioned as the manual directs. A chain that is too loose may derail; one that is too tight may bind or wear parts. Inspect the sprocket for damage or excessive wear, and replace parts as the service manual directs.
| Check | What to confirm | Why it matters |
|---|---|---|
| Pitch | Matches bar and drive sprocket | A mismatch prevents proper engagement |
| Gauge | Matches bar groove | A mismatch can cause poor tracking |
| Drive-link count | Matches bar specification | The chain must fit the bar length |
| Chain direction | Cutters face forward over the bar top | Incorrect installation prevents proper cutting |
| Tension | Set by the saw manual | Too loose or too tight can cause trouble |
There is no safe universal bar-length-to-engine-size ratio or torque value. Use the manufacturer’s fitment chart and service manual. Hardwood and longer bars increase load. Do not force the saw or fit an unapproved longer bar to solve a cutting problem.
Correct the fault, then make a controlled test cut
Once you find the fault, correct it before running the saw. Sharpen both cutter sides to the chain maker’s specifications, set the depth gauges with the right tool, clean the bar groove and oil passages, and replace damaged parts. Turn the bar only if its maker permits it. Refit and tension the chain according to the manual.
Use dedicated chainsaw bar-and-chain oil. Choose oil suited to the working temperature, then confirm oil reaches the bar tip using the saw maker’s test method. Oil flow and any adjustment are model-specific; do not rely on an assumed universal flow rate.
Start the saw outdoors and follow its manual. Make a controlled test cut from stable footing, with a two-handed grip. Keep the bar nose clear of wood and nearby objects. The upper quadrant of the bar nose can cause rotational kickback, which may lift the bar rapidly toward you. Use a functioning chain brake and low-kickback equipment. Never cut above shoulder height.
Keep the bumper spikes engaged where appropriate, and do not twist the bar in the cut, force the chain, or let the wood pinch it. For pruning, assess how the limb may move before cutting. Do not use a running chainsaw from a ladder. Leave hung-up trees, trees under tension, and complex felling to qualified professionals.
If the saw still cuts right, stop and recheck the bar, chain fit, and sprocket. If it also runs poorly, overheats, or lacks power, diagnose fuel, air, exhaust, and carburetion before continued use. Use the service manual’s idle and maximum RPM values and a tachometer where required. Do not tune by ear or exceed the specified maximum RPM.
Typical diagnostic example: After an even sharpening and bar inspection, a saw still pulls. The chain’s gauge matches the bar, but its pitch or drive-link count does not match the saw’s specified setup. Confirming every fitment marking before replacing parts can prevent buying another incompatible chain.
Maintain the setup and store it safely
Regular checks help catch uneven wear before it affects a cut. After use, shut down the saw, let it cool, engage the brake for transport, and clear debris from the bar and saw. Inspect the chain, bar, and safety controls before the next job. Follow the manual for chain tension during storage; do not assume every saw needs the same setting.
Follow the manufacturer’s fuel-drain or fuel-stabilization instructions. Use the specified fuel mix and fresh fuel. A 50:1 mix is correct only when the saw maker specifies 50:1. Never use straight gasoline in a two-stroke saw. Store the saw securely, with the chain protected from corrosion and out of reach of unauthorized users.
Before returning it to service, recheck chain condition and tension, oil delivery, and safety controls. If a defect returns or damage is unclear, stop and have the saw assessed rather than guessing at parts.
Frequently asked questions
Why does my chainsaw keep cutting to the right?
Uneven cutter sharpness or length is a common cause. A bent or worn bar, incorrect chain fit, or sprocket wear can also make the saw steer.
Can a dull chain make a saw cut crooked?
Yes. Uneven dullness or sharpening can make the chain cut off line. Stop and inspect both sides instead of pushing harder.
Should left and right cutters be the same length?
Keep cutters even according to the chain maker’s limits and sharpening instructions. Use the specified file size and filing angle.
What depth-gauge setting should I use?
Use the chain maker’s specification and depth-gauge tool. Although .025 in (0.635 mm) is common on many chains, it is not correct for every chain.
Can I turn the guide bar around?
Only if the bar maker’s instructions allow it. Clean the groove and oil holes, and inspect the rails before refitting.
How do I know if the chain fits my saw?
Match pitch, gauge, and drive-link count to the bar and sprocket specifications. Confirm the setup in the saw manual or fitment chart.
Can I fit a longer bar to improve cutting?
Only if the manufacturer approves it for your saw. A longer bar increases load, and there is no safe universal bar-length-to-engine-size rule.
What should I do if the chain comes off?
Stop the saw, wait for all motion to stop, and find the cause. Check chain fit, tension, bar condition, and sprocket before restarting.
Why does my saw still pull after sharpening?
Inspect the bar rails and alignment, then confirm chain fit and sprocket condition. Replace damaged parts or seek qualified service if the cause is unclear.
Is it safe to keep cutting if the saw steers right?
No. Stop and correct the cause. Do not compensate with body force or twist the saw through the cut.
(This article was written by one of our staff writers, Robert Callahan. Visit our Meet the Team page.)
