1. Screw milling machine, can machining single-head and multihead rotors of spiral drilling rigs (downhole motors), the max machining diameter isφ300㎜, Min. diameter isφ65㎜, Max. workpiece length is 4m, effective milling length is 3m
2. Main technical parameter:
Triaxial linkage: X+Z+C(spindle rotation)
Z axis (lengthways) carriage moving distance: 3.5m
X axis (crosswise) carriage moving distance: 300mm
Quck travel speed Z/X 4000/3000（m/min）
Screw pitch range: 5～1000㎜；
Groove depth: 0～80㎜
Minimum pulse equivalent Z/X 0.01/0.005㎜
