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