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 given fixing bolts and spring washers. Motors can be sprocket drive or equipped with winch or belt drum. Features a self-braking worm gear tranny with a patented included linear limit switch program with duty and protection switches having Ventilation Screening And Lifting Gearbox Greenhouse Geared Motors System exceptional switching precision.