Stump grinder

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A stump grinder is a power tool that removes tree stumps by means of a rotating flail that chips away the wood. Stump grinders come in a variety of sizes from the size of a lawn mower to nearly as big as a large truck. Most accomplish their task by means of a high-speed disk with specially designed teeth that grind the stump and underground roots into small chips. A typical stump grinder incorporates a cutter wheel with carbide teeth. The cutter wheel movements are controlled by hydraulic cylinders to push the cutter wheel through the stump and to raise and lower the cutter wheel.