| 摘要 |
A cutting tool includes a frame, a shaft, a cutter and a cam. The shaft is rotatable about an axis. The cutter is coupled to the shaft such that rotation of the shaft about its axis causes rotation of the cutter about the shaft's axis. The cam is positioned around the shaft such that the cam contacts the frame upon rotation of the shaft, The cam has a cam surface which is distanced away from the axis of the shaft a varying amount such that contact of the ca m with the frame upon rotation of the shaft causes the shaft, and thus the cutter, to reciprocate in a generally transverse direction relative to the axis of the shaft.
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