| 摘要 |
A drill for metal chip-removing machining includes a shank which defines a longitudinal axis of rotation and has front and rear ends. The front end carries cutting edges defined by respective inserts. Two chip flutes extend rearwardly from respective cutting edges for conducting chips. A cooling channel includes a main portion extending through the shank between the two chip flutes. At a location spaced from the front end of the shank, the main portion of the cooling channel splits into two branch portions which terminate in the front end of the shank. The main portion of the cooling channel is arranged such that a center axis thereof lies parallel to, and radially offset from, the axis of rotation, and such that the axis of rotation lies within the main portion of the cooling channel.
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