| 摘要 |
A replaceable tooth for excavating equipment, such as earth augers, has a distal portion which is generally rectangular in plan but has an inwardly curved cutting edge. The distal is formed with ribs on the upper surface which originate at a transverse protuberance at the rear of the distal and slant forwardly-outwardly to the front corners of the tooth. On the bottom surface, a corresponding protuberance and ribs of lesser dimension than those on the upper surface underly the upper surface ribs. Between the ribs and outside the ribs the tooth is relatively thin and comprises webs. In use, the webs wear faster than the ribs and expose the ends of the rib in points which improve digging action.
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