The Motovario PBH series of gearboxes for heavy industries, is a range of parallel and bevel helical gearboxes up to 4 reduction stages, built as standard and designed specifically to ensure maximum reliability in the most arduous conditions. PBH series reducers present the classic features of parallel and bevel helical gear reducers such as robustness, efficiency, compactness and reliability, combined with universality, ease of application and low maintenance which are a result of a modern design concept, typical of quality reducers.