When machining a shaft type workpiece with a single knife, especially an elongated shaft, the following problems often occur. If the rotation speed is increased and the feed rate is reduced, the surface of the workpiece is roughened, but the workpiece is easily deformed and bent. If the feed rate is low and the feed rate is small, the efficiency is low. The rotation speed is low, the surface roughness is small, the wear of the tool holder is large, and the workpiece is prone to bamboo joints and polygons. Influence worker
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