Mitigating Kickback from Pinch-Points
Watch the direction of the lean before you ever touch the saw to the bark, as the technical notes at longview arborist tx otmconferences explain how a tree behaves during a felling cut. Every arborist working in Longview, TX knows that wood moves in ways that can trap a bar if the geometry is wrong. If the weight of the tree shifts toward the cut before the hinge is set, the wood will pinch the guide bar and send the saw kicking toward your body. This is not a matter of luck, it is a matter of mechanical physics.
The Geometry of the Pinch
Kickback happens when the compression side of the tree closes the gap on the bar. When you are performing a removal, the weight of the canopy creates massive downward pressure. If the notch is not deep enough or the angle is off, the center of gravity shifts into the kerf. As the wood fibers compress, they squeeze the bar against the bottom of the cut. This creates a mechanical bind that converts the energy of the falling tree into a sudden lateral force. You will feel the saw bite and jump if you do not manage the tension correctly.
Managing the Tension and Compression
You must identify the compression side and the tension side before you begin your backcut. The compression side is where the wood is being squeezed together, and this is where the pinch will occur. Always leave a hinge to control the fall. If you cut too deep into the notch, you lose control of the hinge and allow the tree to sit back on the saw. In Longview, TX, many species have heavy limbs that increase this risk during crown reduction. Always aim your backcut slightly above the level of the notch to create a wedge shape that resists closing.
Using Wedges to Prevent Binding
Do not wait for the saw to get stuck before you act. As soon as the backcut reaches a depth where the bar is at risk, drive a plastic wedge into the kerf. This wedge acts as a mechanical spacer. It keeps the gap open and prevents the compression side from meeting the tension side. If you are working on a heavy removal, you might need to use a larger wedge or even a specialized tool to keep that space clear. If the wood starts to move, you must react immediately to prevent the bar from being trapped.
The Role of the Hinge
The hinge is your only connection to the tree once the backcut starts. A thin hinge will snap, causing the tree to fall unpredictably. A thick hinge provides the strength needed to guide the trunk. If you are performing crown thinning or pruning near a structure, the hinge must be precise. If the hinge fails, the tree can pivot or kick, putting the climber or the person on the ground in danger. Always maintain a clear drop zone to ensure no one is standing where the wood might jump.