A traditional axe uses a wedge-shaped head to split the wood. The wedge, as you know, is a simple machine that gives a person a physical advantage over wood. (Other simple machines include the wheel and axle, pulley, inclined plane, screw and the lever.) For eons, humans have used the wedge combined with strength and some help from gravity, to splinter wood.

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Even though the tool is simple, using it can be dangerous in unskilled hands. One uses a lot of power to drive the sharp tip into wood and once the head of an axe gets going, it’s not easy to stop. The chopper can miss the wood and impale a body part or hit the log at the wrong angle, causing the axe to bounce and do little chopping at all.

But check out this ax from Finnish company Vipukirves. It’s called the Leveraxe and instead of a wedge, this ax works more like a lever. The head is attached to the handle from the side instead of the center, which also moves the center of gravity off to the side. The specialized shape of the head also capitalizes on the natural kinetic energy of a person’s swing. The tip is not strictly a wedge. A couple of inches from the tip, the blades widens. That causes the head to slow when it penetrates the wood, but the momentum from the swing is still there and because the head is off center, gravity forces the tip to rotate downward, which turns the blade into a lever.

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Just look how easy it is to split wood. And putting the log inside a tire is also genius-level thinking. Father’s Day is right around the corner, people. Wouldn’t dad love this? And hell, mom might like one too.

via BoingBoing

Credit: Vipukirves