How stump grinding works

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Before

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After

Carbide teeth are mounted to a wheel that rotates at a high rate of speed. Through a series of passes back and forth, the carbide teeth turn the stump into chips. The general method is to approach the stump with the cutting wheel and sweep across the top of the stump, the wheel gets lowered and the wheel sweeps in the opposite direction. This will continue until you have worked to the bottom of the stump. The wheel gets raised and the machine will then be moved an inch or so into the stump and repeat the back and forth passes moving to the bottom of the stump.  This is repeated until the stump is completely ground.  I typically will grind 6-8" below the surface to allow for a layer of fresh dirt to be leveled out and grass seed to be planted.