Bucking is the process of cutting a log into shorter lengths with a chain saw.
Before cutting, make sure your footing is firm and your weight is evenly distributed on both feet. When possible, raise and support the log using limbs, logs, or chocks.
Do not buck a log that is larger than your saw's maximum cutting thickness.
Cutting capacity varies by model. Check the product information and operator's manual for your exact Sun Joe chain saw before beginning.
Before You Begin
- Use the bucking procedure only with a chain saw or a convertible pole + chain saw when operated in the configuration permitted by its operator's manual.
- Make sure both feet are on solid ground and maintain a stable stance.
- Hold the chain saw firmly with both hands.
- Allow the chain to reach full speed before it enters the wood.
- Keep the saw running at a steady speed while cutting.
- Let the chain do the cutting. Apply only light downward pressure rather than forcing the saw through the log.
Keep the chain away from the ground. Contact with the ground while completing a cut can damage or dull the saw chain.
How Is the Log Supported?
The correct cutting sequence depends on where the log is supported.
Fully Supported
Supported Along Its Entire Length
Cut the log from the top. This is called overbucking.
One End Supported
Supported on One End
Begin from the underside, then finish the cut from the top.
Both Ends Supported
Supported on Both Ends
Begin from the top, then complete the cut from underneath.
Log Supported Along Its Entire Length
- Confirm the log is supported along its full length.
- Position yourself with firm footing and hold the saw securely with both hands.
- Allow the chain to reach full speed before entering the wood.
- Cut downward from the top of the log. This is an overbuck cut.
- Near the end of the cut, reduce cutting pressure while maintaining a secure grip on the handles.
Log Supported on One End
- Begin from the underside of the log.
- Cut approximately one-third of the log's diameter from underneath. This is an underbuck cut.
- Move to the top of the log.
- Finish by cutting downward from the top until the second cut meets the first.
Log Supported on Both Ends
- Begin from the top of the log.
- Cut approximately one-third of the log's diameter downward from the top.
- Move to the underside of the log.
- Finish by underbucking through the lower two-thirds until the second cut meets the first.
Using the Spiked Bumper
If your chain saw is equipped with a spiked bumper, it can be used to help support and control the saw while bucking.
- Place the spiked bumper against the log.
- Use the bumper as a pivot point.
- Move the saw in an arched cutting motion so the guide bar enters the wood.
- Repeat as needed, repositioning the spiked bumper at another point on the log.
Bucking on a Slope
Always stand on the uphill side of the log when bucking on a slope.
As the cut approaches completion, reduce the cutting pressure while keeping a secure grip on both chain saw handles.
Do not allow the chain to contact the ground.
After Completing the Cut
- Wait for the saw chain to come to a complete stop before moving the chain saw.
- Stop the motor before moving to another log or cutting location.
- Check the chain and guide bar before continuing if the chain contacted the ground or another unintended surface.
Frequently Asked Questions
What does "bucking" mean?
Bucking is the process of cutting a log into shorter lengths.
Which direction should I cut if the whole log is supported?
When the log is supported along its entire length, cut from the top using an overbuck cut.
How do I cut a log that is supported on only one end?
Cut approximately one-third of the diameter from the underside, then finish by overbucking from the top until the cuts meet.
How do I cut a log that is supported on both ends?
Cut approximately one-third of the diameter from the top, then finish by underbucking through the lower two-thirds until the cuts meet.
Where should I stand when bucking on a slope?
Always stand on the uphill side of the log.
Can I buck a log larger than my saw's cutting capacity?
No. Do not buck logs that are larger than the maximum cutting thickness specified for your chain saw.
Find Your Electric Chain Saw or Pole Saw
Visit the Shop Joe Chainsaws + Pole Saws collection to locate your model and review its maximum cutting thickness and product information.
Before bucking, check the operator's manual for your exact model to confirm that the saw and its current configuration are intended for this type of cutting.
If you need help identifying your model or confirming the correct guidance for your saw, Shop Joe Customer Care can help.