superior size/performance ratio designed for permanent operation in rough conditions above-average lifespan housing produced from high quality grey cast iron with rugged walls and internal ribbing extreme torsional resistance and low noise smooth surface prevents build up of residue (advantageous in food-; beverage-; pharmaceutical industry) superior smooth operation even small models are able to transmit high torques integral coupling / IEC-Adaptor with servo coupling lifetime lubrication (sealed for life) high rigidity mathematically correct ratios up to i=100