Abstract: A pile-cutting machine for cutting multi-sided piles, such as square piles, having a frame which can be clamped to the pile at a desired location, a carriage mounted on the frame for movement in a continuous path around the pile and a cutting head carried by the carriage with a power-driven cutter positioned relative to the carriage to be at full cutting depth in a pile as the carriage moves along a straight side of the pile and, thereafter, to automatically withdraw from the pile as the carriage swings in travelling around a corner of the pile and subsequently move to full cutting depth in the pile as the carriage advances along the next straight side of the pile.

Abstract: A cutting machine for concrete piles and the like having an annular elongate frame positionable around a concrete pile, with first and second sets of guide members in spaced-apart relation to align the frame with the pile, first and second sets of movable clamps for locking the frame to the concrete pile, annular track means on the frame and a cutter head with drive means movably mounted on the annular track means and having a cutter-carrying arm movable across the top of the frame to engage the wall of the concrete pile.