The 5840-31ZY double long model is the top of the line double extended model in the series. It adopts a double section extended structure of an extended 31ZY motor barrel and an extended gearbox connection section, paired with a 5840 all metal thickened worm gear gearbox. Compared to the standard and single length models, the winding capacity and heat dissipation area have been double increased, making it less prone to overheating and fatigue during long-term continuous operation; The 31ZY high-power brushed core is paired with a large-sized turbine pair, providing abundant low-speed output torque. It comes with a power-off mechanical self-locking mechanism, DC12V/24V mainstream voltage, and multiple gear ratios to choose from. It is suitable for industrial automation, medical equipment, and heavy-duty intelligent equipment for all-weather heavy-duty operations.