optimised size/performance ratio designed for permanent operation under rough conditions above average lifespan produced entirely in stainless steel extreme torsional resistance and low noise smooth surface prevents build-up of residue (of advantage for food-; beverage-; pharmaceutical industry) case hardened worm shafts and worms with precision ground flanks helical worm gearboxes equipped with helical gear wheel space saving angular drive superior smooth operation high efficiency through the use of synthetic oil (lifetime lubrication)