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