| 摘要 |
A hard material insert (1) for a drill (2, 2′) includes an axially central reinforcement (3) provided in the insert, and two diametrically opposite, radial arms (4) each having a cross-section tapering radially outwardly, opposite free side (8) and connection side (7), with the free and connection sides (8, 7) of one of the radial arms (4) being arranged alternatively to the free and connection sides of another of the radial arms (4), and a concave recess (6) provided on the connection side (7).
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