A tree chipper or wood chipper's a machine used for reducing wood (generally tree limbs or trunks) into smaller parts, such as wood chips or sawdust. They're often portable, being mounted on wheels on frames suitable for towing behind a truck or van. Power's generally provided by an internal combustion engine from 3 to 1,000 horsepower. Tree chippers are typically made of a hopper with a collar, the chipper mechanism itself, and an optional collection bin for the chips. A tree limb's inserted i… (More on Woodchipper)