Chainsaw kickback and how to prevent it

Symptoms

• Bar tip suddenly jerks up and back toward the operator
• Happens most when cutting with the upper tip of the bar
• Occurs when the tip touches a branch, log, or the ground unexpectedly
• Chain brake activates suddenly during cutting

Likely causes

• CommonCutting with the upper quadrant of the bar tipContact in this zone forces the bar violently upward and toward the operator.
• CommonPinching the bar in a cutA closing cut can pinch the bar and cause the chain to grab suddenly.
• PossibleDull or improperly filed chainA chain that doesn't cut cleanly is more likely to snag and kick.
• PossibleLow-kickback chain not installedStandard chains have more aggressive teeth that increase kickback risk versus low-kickback designs.
• Less commonCutting overhead or at odd angles without controlPoor body position reduces the operator's ability to control a kickback event.

What to do

1. Always keep the chain sharp and properly tensioned, since a dull chain increases snagging and kickback.
2. Watch bar tip position at all times and avoid letting the upper tip contact wood, branches, or the ground.
3. Use a firm two-handed grip with your thumb wrapped under the front handle at all times.
4. Stand with solid footing, slightly to the side of the cutting line, not directly behind the saw.
5. Engage the chain brake before walking, and let go of the throttle whenever you're not actively cutting.
6. Consider a low-kickback chain and a bar with a reduced-radius tip if your saw supports one.
7. If you're new to chainsaw use, take a hands-on safety course before cutting unsupervised.

Tools and parts

• Chain file (to maintain a sharp chain)

When to call a pro

If you're not confident handling a chainsaw safely, hire a professional tree service for the job instead.

Safety