Felling a tree is a precise operation where preparation dictates safety, and understanding how to cut a fallen tree without pinching chainsaw is the most critical skill you can possess. A pinched bar creates a dangerous kickback, stalls the engine, and can hurl the machine back at you with violent force. This guide moves beyond basic technique to detail the physics of wood tension and the practical steps required to fell trees safely, even when the traditional falling faces challenges.
Understanding Wood Tension and Pinching
The core principle behind how to cut a fallen tree without pinching chainsaw revolves around managing the tension stored in the wood fibers. When a tree or a section of a fallen log rests on the ground, the weight of the trunk creates pressure against the saw bar. If you cut straight through without relief, the wood compresses the blade, pinching it tightly. This friction stops the chain, and the sudden release of stored energy can cause the saw to jerk unpredictably, leading to loss of control or personal injury.
The Role of the Humboldt Cut
Named after its developer, the Humboldt cut is a foundational open-face felling technique that is exceptionally effective for preventing pinch. It involves making a precise directional cut at a 70-degree angle toward the intended fall direction. This initial slice acts as a hinge, creating a gap in the wood ahead of the main horizontal felling cut. By establishing this gap before the tree begins to move, you ensure that the falling weight pulls the bar open rather than closing it, which is the essence of how to cut a fallen tree without pinching chainsaw in a dynamic scenario.
Strategic Undercutting for Fallen Logs
When dealing with a tree already on the ground, the strategy shifts to managing the log’s position relative to the ground surface. The goal is to create a stable platform for your saw, preventing the trunk from rolling or pinching the bar as you work. This requires assessing the log’s diameter and the clearance it has from the earth. If the log is too low, the dirt will interfere with your cut; if it is too high, the weight might shift unexpectedly. Proper positioning is the first defense against a pinched bar.
Using Wedges and Shims
For larger logs, relying solely on the saw’s depth gauge is insufficient. The most reliable method for how to cut a fallen tree without pinching chainsaw involves the tactical use of plastic or metal wedges. As you make your felling cut, insert the wedge into the kerf on the side opposite the fall direction. This physically holds the log open, preventing the wood from closing in on the bar. You will maintain a consistent cutting depth, reduce the risk of the saw binding, and significantly lower the physical strain required to push the saw through the cut.
Execution and Safety Protocol
Before the blade touches the wood, you must establish an escape route. Once the cut is deep enough to accommodate your body weight, position yourself slightly to the side of the intended fall path, never directly in line with the tree. As you complete the back cut, remain alert to the sound of the wood fibers snapping. If you feel the saw vibrate excessively or the cutting speed drops, stop immediately. This indicates the pinching point is forming, and attempting to force the cut will result in a dangerous kickback.
Advanced Techniques for Difficult Cuts
In scenarios where a log is suspended in the air or pinching seems inevitable, you must utilize mechanical advantage. If the tree is hung up on another tree or a rock, cutting through the tensioned wood is impossible without specialized tools. In these situations, using a rope and a second person to pull the log away from the obstruction is safer than forcing the chainsaw. Alternatively, a winch or a block and tackle system can create the necessary clearance to complete the cut safely, ensuring the chain remains in a lubricated and controlled environment.
