| 摘要 |
The present concept a stump auger is used for removing tree stumps. The stump auger includes a main shaft connected at a top end to a drive mechanism for turning the shaft about a vertical axis. The main shaft is connected at a bottom end to a cone top wherein the cone including a thread extending about the outer surface of the cone. The stump auger further includes at least two boring bars, each boring bar includes third blades mounted in stepped offset side by side fashion wherein the inner face of one third blade abuts the outer face of the adjacent third blade. The third blades oriented parallel to a bar axis which defines a boring bar angle theta relative the horizontal, and the third blades also include a blade edge for shaving, grinding and chipping the tree stump as the stump auger is rotated about the vertical axis. |
