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machining crankshaft flange end-face hole, adopts integrated cast iron slant bed in 45°. Two sets of left/right symmetrical three-coordinate units on the bed realize the movement in X, Y and Z directions. Equipped with two sets of SIEMENS 802D CNC systems, three axes of this machine can interpolate. Therefore, both ends of the crankshaft can be machined simultaneously and also separately. The machine is suitable for machining double-end holes of various crankshaft components with length range from 500mm to 1100mm, and features high rigidity, high accuracy, high automaticity, low labor intensity and convenient operation, as well as suitable for large volume production.