The screw shutter includes a motor, shutter, frame, and protective cover; it employs a three-stage reduction mechanism and is driven by a spiral coupling for a greater output torque. The shutter is paired with a steel frame to overcome uneven civil construction, thereby reducing the overall noise and vibration of the unit.

Outdoor-type long-time operation motor with protection grade > IP55. The stroke control mechanism operates on the decimal counter principle, ensuring a stroke accuracy of 0.5%. Torque protection control is achieved by the worm generating an axial displacement to trigger a microswitch, thereby protecting the electrical appliance. Easy operation and maintenance, with on-site and remote control capabilities.