The EP motor gearboxes are maintenance-free, compact power units for generating ventilation, screening and lifting systems in greenhouses and livestock sheds. Electric motor gearboxes are given fixing bolts and spring washers. Motors could be sprocket drive or built with winch or belt drum. Features a Ventilation Screening And Lifting Gearbox Greenhouse Geared Motors System self-braking worm gear transmission with a patented integrated linear limit switch program with duty and security switches having exceptional switching precision.